File greetd-0.7.0.obscpio of Package greetd

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File greetd-0.7.0.obscpio of Package greetd (Revision 910cd3d8195a904cc5ce3088e88d8f8e)

Currently displaying revision 910cd3d8195a904cc5ce3088e88d8f8e , Show latest

07070100000000000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001500000000greetd-0.7.0/.builds07070100000001000081A4000003E800000064000000015FE1D8AC00000100000000000000000000000000000000000000002000000000greetd-0.7.0/.builds/alpine.ymlimage: alpine/edge
packages:
  - cargo
  - linux-pam-dev
sources:
  - https://git.sr.ht/~kennylevinsen/greetd
tasks:
  - test: |
      cd greetd
      cargo check --locked --all-targets --all-features
      cargo test --locked --all-targets --all-features
07070100000002000081A4000003E800000064000000015FE1D8AC0000012B000000000000000000000000000000000000002300000000greetd-0.7.0/.builds/archlinux.ymlimage: archlinux
packages:
  - rust
sources:
  - https://git.sr.ht/~kennylevinsen/greetd
tasks:
  - rustfmt-check: |
      cd greetd
      cargo fmt -- --check
  - test: |
      cd greetd
      cargo check --locked --all-targets --all-features
      cargo test --locked --all-targets --all-features
07070100000003000081A4000003E800000064000000015FE1D8AC00005C53000000000000000000000000000000000000001800000000greetd-0.7.0/Cargo.lock# This file is automatically @generated by Cargo.
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07070100000005000081A4000003E800000064000000015FE1D8AC0000894D000000000000000000000000000000000000001500000000greetd-0.7.0/LICENSE                    GNU GENERAL PUBLIC LICENSE
                       Version 3, 29 June 2007

Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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How to Apply These Terms to Your New Programs

If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.

To do so, attach the following notices to the program.  It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.

<one line to give the program's name and a brief idea of what it does.>
    Copyright (C) <year>  <name of author>

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    it under the terms of the GNU General Public License as published by
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    (at your option) any later version.

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    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

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    along with this program.  If not, see <https://www.gnu.org/licenses/>.

Also add information on how to contact you by electronic and paper mail.

If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:

<program>  Copyright (C) <year>  <name of author>
    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License.  Of course, your program's commands
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You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.

The GNU General Public License does not permit incorporating your program
into proprietary programs.  If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library.  If this is what you want to do, use the GNU Lesser General
Public License instead of this License.  But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.
07070100000006000081A4000003E800000064000000015FE1D8AC0000092F000000000000000000000000000000000000001700000000greetd-0.7.0/README.md# greetd

greetd is a minimal and flexible login manager daemon that makes no assumptions about what you want to launch.

Use [gtkgreet](https://git.sr.ht/~kennylevinsen/gtkgreet) to launch [sway](https://github.com/swaywm/sway) if you want a fully graphical session, or use `agreety` to launch a shell if you want a drop-in replacement for `agetty(8)` and `login(1)`.

If you can run it from your shell in a TTY, greetd can start it. If it can be taught to speak a simple JSON-based IPC protocol, then it can be a greeter.

See the [wiki](https://man.sr.ht/~kennylevinsen/greetd) for FAQ, guides for common configurations, and troubleshooting information.

## List of known greetd greeters

- agreety - The simple, text-based greeter living in this repo is a simple example.
- [gtkgreet](https://git.sr.ht/~kennylevinsen/gtkgreet) - The flagship graphical, GTK based greeter (xdg-shell or wlr-layer-shell, to be used with something like `cage`)
- [dlm](https://git.sr.ht/~kennylevinsen/dlm) - Dumb Login Manager (using fbdev)
- [wlgreet](https://git.sr.ht/~kennylevinsen/wlgreet) - Wayland greeter (using wlr-layer-shell, to be used with something like `sway`)
- [tuigreet](https://github.com/apognu/tuigreet) - Console UI greeter (using tui-rs)

## Installation

The below will install greetd, agreety and the default configuration. This looks *just* like `agetty(8)` and `login(1)`. See the manpages and the wiki for information on how to do more interesting things.

### From packages

#### Arch Linux

greetd and a few greeters are available in AUR for Arch Linux.

#### Gentoo

```sh
emerge gui-libs/greetd
```

### Manually from source

```sh
# Compile greetd and agreety.
cargo build --release

# Put things into place
sudo cp target/release/{greetd,agreety} /usr/local/bin/
sudo cp greetd.service /etc/systemd/system/greetd.service
mkdir /etc/greetd
cp config.toml /etc/greetd/config.toml

# Create the greeter user
sudo useradd -M -G video greeter
sudo chown -R greeter:greeter /etc/greetd/

# Look in the configuration file `/etc/greetd/config.toml` and edit as appropriate.
# When done, enable and start greetd
systemctl enable --now greetd
```

## How do I write my own greeter?

All you need to do is an application that can speak the greetd IPC protocol, which is documented in `greetd-ipc(7)`. See gtkgreet or agreety for inspiration.
07070100000007000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001500000000greetd-0.7.0/agreety07070100000008000081A4000003E800000064000000015FE1D8AC00000183000000000000000000000000000000000000002000000000greetd-0.7.0/agreety/Cargo.toml[package]
name = "agreety"
version = "0.6.0"
authors = ["Kenny Levinsen"]
edition = "2018"
license = "GPL-3.0"
homepage = "https://kl.wtf/projects/agreety"
repository = "https://git.sr.ht/~kennylevinsen/greetd/"

[dependencies]
greetd_ipc = { path = "../greetd_ipc", features = ["sync-codec"]}
inish = { path = "../inish"}
rpassword = "4.0"
getopts = "0.2"
enquote = "1.0.3"
nix = "0.17"07070100000009000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001900000000greetd-0.7.0/agreety/src0707010000000A000081A4000003E800000064000000015FE1D8AC000016B4000000000000000000000000000000000000002100000000greetd-0.7.0/agreety/src/main.rsuse std::{
    env, fs,
    io::{self, BufRead},
    os::unix::net::UnixStream,
};

use enquote::unquote;
use getopts::Options;
use nix::sys::utsname::uname;
use rpassword::prompt_password_stderr;

use greetd_ipc::{codec::SyncCodec, AuthMessageType, ErrorType, Request, Response};

fn maybe_unquote(s: &str) -> Result<String, Box<dyn std::error::Error>> {
    Ok(match s.chars().next() {
        Some('"') | Some('\'') => unquote(s)?,
        _ => s.to_string(),
    })
}

fn prompt_stderr(prompt: &str) -> Result<String, Box<dyn std::error::Error>> {
    let stdin = io::stdin();
    let mut stdin_iter = stdin.lock().lines();
    eprint!("{}", prompt);
    Ok(stdin_iter.next().unwrap()?)
}

fn get_distro_name() -> Result<String, Box<dyn std::error::Error>> {
    let os_release = fs::read_to_string("/etc/os-release")?;
    let parsed = inish::parse(&os_release)?;
    let general = parsed.get("").ok_or("no general section")?;
    Ok(maybe_unquote(
        general.get("PRETTY_NAME").ok_or("no pretty name")?,
    )?)
}

fn get_issue() -> Result<String, Box<dyn std::error::Error>> {
    let vtnr: usize = env::var("XDG_VTNR")
        .unwrap_or_else(|_| "0".to_string())
        .parse()
        .expect("unable to parse VTNR");
    let uts = uname();
    Ok(fs::read_to_string("/etc/issue")?
        .replace(
            "\\S",
            &get_distro_name().unwrap_or_else(|_| "Linux".to_string()),
        )
        .replace("\\l", &format!("tty{}", vtnr))
        .replace("\\s", &uts.sysname())
        .replace("\\r", &uts.release())
        .replace("\\v", &uts.version())
        .replace("\\n", &uts.nodename())
        .replace("\\m", &uts.machine())
        .replace("\\\\", "\\"))
}

enum LoginResult {
    Success,
    Failure,
}

fn login(node: &str, cmd: &mut Option<String>) -> Result<LoginResult, Box<dyn std::error::Error>> {
    let username = loop {
        let username = prompt_stderr(&format!("{} login: ", node))?;
        if username.starts_with('!') {
            *cmd = Some(username[1..].to_string());
            eprintln!("Login command changed to: {}", &username[1..]);
            continue;
        }
        break username;
    };

let mut stream = UnixStream::connect(env::var("GREETD_SOCK")?)?;

let mut next_request = Request::CreateSession { username };
    let mut starting = false;
    loop {
        next_request.write_to(&mut stream)?;

match Response::read_from(&mut stream)? {
            Response::AuthMessage {
                auth_message,
                auth_message_type,
            } => {
                let response = match auth_message_type {
                    AuthMessageType::Visible => Some(prompt_stderr(&auth_message)?),
                    AuthMessageType::Secret => Some(prompt_password_stderr(&auth_message)?),
                    AuthMessageType::Info => {
                        eprintln!("info: {}", auth_message);
                        None
                    }
                    AuthMessageType::Error => {
                        eprintln!("error: {}", auth_message);
                        None
                    }
                };

next_request = Request::PostAuthMessageResponse { response };
            }
            Response::Success => {
                if starting {
                    return Ok(LoginResult::Success);
                } else {
                    starting = true;
                    let command = match cmd {
                        Some(cmd) => cmd.clone(),
                        None => prompt_stderr("Command: ")?,
                    };
                    next_request = Request::StartSession {
                        cmd: vec![command.to_string()],
                    }
                }
            }
            Response::Error {
                error_type,
                description,
            } => {
                Request::CancelSession.write_to(&mut stream)?;
                match error_type {
                    ErrorType::AuthError => return Ok(LoginResult::Failure),
                    ErrorType::Error => {
                        return Err(format!("login error: {:?}", description).into())
                    }
                }
            }
        }
    }
}

fn print_usage(program: &str, opts: Options) {
    let brief = format!("Usage: {} [options]", program);
    print!("{}", opts.usage(&brief));
}

fn main() {
    let args: Vec<String> = env::args().collect();
    let program = args[0].clone();
    let mut opts = Options::new();
    opts.optflag("h", "help", "print this help menu");
    opts.optopt("c", "cmd", "command to run", "COMMAND");
    opts.optopt(
        "f",
        "max-failures",
        "maximum number of accepted failures",
        "FAILURES",
    );
    let matches = match opts.parse(&args[1..]) {
        Ok(m) => m,
        Err(f) => {
            println!("{}", f.to_string());
            print_usage(&program, opts);
            std::process::exit(1);
        }
    };
    if matches.opt_present("h") {
        print_usage(&program, opts);
        std::process::exit(0);
    }

let mut cmd = matches.opt_default("cmd", "");
    let max_failures: usize = match matches.opt_get("max-failures") {
        Ok(v) => v.unwrap_or(5),
        Err(e) => {
            eprintln!("unable to parse max failures: {}", e);
            std::process::exit(1)
        }
    };

if let Ok(issue) = get_issue() {
        print!("{}", issue);
    }

# The default session, also known as the greeter.
[default_session]

# `agreety` is the bundled agetty/login-lookalike. You can replace `$SHELL`
# with whatever you want started, such as `sway`.
command = "agreety --cmd $SHELL"

# The user to run the command as. The privileges this user must have depends
# on the greeter. A graphical greeter may for example require the user to be
# in the `video` group.
user = "greeter"
0707010000000C000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001700000000greetd-0.7.0/fakegreet0707010000000D000081A4000003E800000064000000015FE1D8AC000001A2000000000000000000000000000000000000002200000000greetd-0.7.0/fakegreet/Cargo.toml[package]
name = "fakegreet"
version = "0.6.0"
authors = ["Kenny Levinsen"]
edition = "2018"
license = "GPL-3.0"
homepage = "https://kl.wtf/projects/greetd"
repository = "https://git.sr.ht/~kennylevinsen/greetd/"

[dependencies]
serde = { version = "1.0", features = ["derive"] }
greetd_ipc = { path = "../greetd_ipc", features = ["tokio-codec"] }
tokio = { version = "0.2", features = ["process"] }
thiserror = "1.0"
0707010000000E000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001B00000000greetd-0.7.0/fakegreet/src0707010000000F000081A4000003E800000064000000015FE1D8AC00000532000000000000000000000000000000000000002400000000greetd-0.7.0/fakegreet/src/error.rsuse std::convert::From;

use serde::{Deserialize, Serialize};
use thiserror::Error as ThisError;

#[derive(Debug, ThisError, Clone, Deserialize, Serialize)]
pub enum Error {
    #[error("{0}")]
    Error(String),

#[error("authentication error: {0}")]
    AuthError(String),

#[error("protocol error: {0}")]
    ProtocolError(String),

#[error("i/o error: {0}")]
    Io(String),

#[error("configuration error: {0}")]
    ConfigError(String),
}

impl From<Box<dyn std::error::Error>> for Error {
    fn from(error: Box<dyn std::error::Error>) -> Self {
        Error::Error(format!("{}", error))
    }
}

impl From<std::io::Error> for Error {
    fn from(error: std::io::Error) -> Self {
        Error::Io(format!("{}", error))
    }
}

impl From<greetd_ipc::codec::Error> for Error {
    fn from(error: greetd_ipc::codec::Error) -> Self {
        match error {
            greetd_ipc::codec::Error::Serialization(s) => Error::ProtocolError(s),
            greetd_ipc::codec::Error::Io(s) => Error::Io(s),
            greetd_ipc::codec::Error::Eof => Error::Io("EOF".to_string()),
        }
    }
}

impl From<String> for Error {
    fn from(error: String) -> Self {
        Error::Error(error)
    }
}

impl From<&str> for Error {
    fn from(error: &str) -> Self {
        Error::Error(error.to_string())
    }
}
07070100000010000081A4000003E800000064000000015FE1D8AC000014F9000000000000000000000000000000000000002300000000greetd-0.7.0/fakegreet/src/main.rsmod error;

use std::{cell::RefCell, env, rc::Rc, time::Duration};

use tokio::{
    net::{UnixListener, UnixStream},
    process::Command,
    task,
    time::delay_for,
};

use crate::error::Error;
use greetd_ipc::{
    codec::{Error as CodecError, TokioCodec},
    AuthMessageType, ErrorType, Request, Response,
};

fn wrap_result<T>(res: Result<T, Error>) -> Response {
    match res {
        Ok(_) => Response::Success,
        Err(Error::AuthError(msg)) => Response::Error {
            error_type: ErrorType::AuthError,
            description: msg,
        },
        Err(e) => Response::Error {
            error_type: ErrorType::Error,
            description: format!("{}", e),
        },
    }
}

struct InnerContext {
    user: Option<String>,
    password: Option<String>,
    ok: bool,
}

struct Context {
    inner: RefCell<InnerContext>,
}

impl Context {
    fn new() -> Context {
        Context {
            inner: RefCell::new(InnerContext {
                user: None,
                password: None,
                ok: false,
            }),
        }
    }

async fn create_session(&self, username: String) -> Result<(), Error> {
        self.inner.borrow_mut().user = Some(username);
        Ok(())
    }

async fn get_question(&self) -> Result<Option<(AuthMessageType, String)>, Error> {
        let s = self.inner.borrow();
        if s.ok {
            Ok(None)
        } else if s.user.is_none() {
            Ok(Some((AuthMessageType::Visible, "User:".to_string())))
        } else if s.password.is_none() {
            Ok(Some((AuthMessageType::Secret, "Password:".to_string())))
        } else {
            Ok(Some((AuthMessageType::Visible, "7 + 2:".to_string())))
        }
    }

async fn post_response(&self, response: Option<String>) -> Result<(), Error> {
        let mut s = self.inner.borrow_mut();
        if s.ok {
            return Err(Error::Error("wat".to_string()));
        }
        if s.user.is_none() {
            s.user = response;
        } else if s.password.is_none() {
            s.password = response;
        } else {
            if s.user != Some("user".to_string())
                || s.password != Some("password".to_string())
                || response != Some("9".to_string())
            {
                delay_for(Duration::from_millis(2000)).await;
                return Err(Error::AuthError("nope".to_string()));
            }
            s.ok = true;
        }
        Ok(())
    }

async fn start(&self, _cmd: Vec<String>) -> Result<(), Error> {
        if !self.inner.borrow().ok {
            return Err(Error::Error("not yet dammit".to_string()));
        }
        delay_for(Duration::from_millis(5000)).await;
        Ok(())
    }

async fn cancel(&self) -> Result<(), Error> {
        let mut s = self.inner.borrow_mut();
        s.user = None;
        s.password = None;
        s.ok = false;
        Ok(())
    }
}

async fn client_get_question(ctx: &Context) -> Response {
    match ctx.get_question().await {
        Ok(Some((auth_message_type, auth_message))) => Response::AuthMessage {
            auth_message_type,
            auth_message,
        },
        res => wrap_result(res),
    }
}

async fn client_handler(ctx: &Context, mut s: UnixStream) -> Result<(), Error> {
    loop {
        let req = match Request::read_from(&mut s).await {
            Ok(req) => req,
            Err(CodecError::Eof) => return Ok(()),
            Err(e) => return Err(e.into()),
        };

println!("req: {:?}", req);
        let resp = match req {
            Request::CreateSession { username } => match ctx.create_session(username).await {
                Ok(()) => client_get_question(&ctx).await,
                res => wrap_result(res),
            },
            Request::PostAuthMessageResponse { response } => {
                match ctx.post_response(response).await {
                    Ok(()) => client_get_question(&ctx).await,
                    res => wrap_result(res),
                }
            }
            Request::StartSession { cmd } => wrap_result(ctx.start(cmd).await),
            Request::CancelSession => wrap_result(ctx.cancel().await),
        };

println!("resp: {:?}", resp);
        resp.write_to(&mut s).await?;
    }
}

pub async fn server() -> Result<(), Error> {
    let path = "./greetd.sock";
    std::env::set_var("GREETD_SOCK", path);

let _ = std::fs::remove_file(path);
    let mut listener =
        UnixListener::bind(path).map_err(|e| format!("unable to open listener: {}", e))?;

let arg = env::args().nth(1).expect("need argument");
    let _ = Command::new("sh").arg("-c").arg(arg).spawn()?;

let ctx = Rc::new(Context::new());

loop {
        match listener.accept().await {
            Ok((stream, _)) => {
                let ctx = ctx.clone();
                task::spawn_local(async move {
                    if let Err(e) = client_handler(&ctx, stream).await {
                        eprintln!("client loop failed: {}", e);
                    }
                });
            }
            Err(err) => return Err(format!("accept: {}", err).into()),
        }
    }
}

#[tokio::main]
async fn main() {
    let res = task::LocalSet::new()
        .run_until(async move { server().await })
        .await;
    if let Err(e) = res {
        eprintln!("error: {}", e);
    }
}
07070100000011000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001400000000greetd-0.7.0/greetd07070100000012000081ED000003E800000064000000015FE1D8AC00000172000000000000000000000000000000000000001C00000000greetd-0.7.0/greetd.service[Unit]
Description=Greeter daemon
After=systemd-user-sessions.service plymouth-quit-wait.service
After=getty@tty1.service
Conflicts=getty@tty1.service

[Service]
Type=simple
ExecStart=greetd
IgnoreSIGPIPE=no
SendSIGHUP=yes
TimeoutStopSec=30s
KeyringMode=shared
Restart=always
RestartSec=1
StartLimitBurst=5
StartLimitInterval=30

[Install]
Alias=display-manager.service
07070100000013000081A4000003E800000064000000015FE1D8AC0000028E000000000000000000000000000000000000001F00000000greetd-0.7.0/greetd/Cargo.toml[package]
name = "greetd"
version = "0.6.0"
authors = ["Kenny Levinsen"]
edition = "2018"
license = "GPL-3.0"
homepage = "https://kl.wtf/projects/greetd"
repository = "https://git.sr.ht/~kennylevinsen/greetd/"

[features]
debug = []

[dependencies]
nix = "0.17"
pam-sys = "0.5.6"
users = "0.9.1"
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
greetd_ipc = { path = "../greetd_ipc", features = ["tokio-codec"] }
inish = { path = "../inish" }
libc = "0.2"
tokio = { version = "0.2", features = ["net", "sync", "macros", "signal", "rt-util", "io-util", "time"] }
getopts = "0.2"
thiserror = "1.0"
async-trait = "0.1"
enquote = "1.0.3"07070100000014000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001800000000greetd-0.7.0/greetd/src07070100000015000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001F00000000greetd-0.7.0/greetd/src/config07070100000016000081A4000003E800000064000000015FE1D8AC000039A5000000000000000000000000000000000000002600000000greetd-0.7.0/greetd/src/config/mod.rsuse std::{collections::HashMap, default::Default, env, fs::read_to_string};

use enquote::unquote;
use getopts::Options;

use super::error::Error;

#[derive(Debug, Eq, PartialEq)]
pub enum VtSelection {
    Next,
    Current,
    None,
    Specific(usize),
}

impl Default for VtSelection {
    fn default() -> Self {
        VtSelection::None
    }
}

#[derive(Debug, Eq, PartialEq, Default)]
pub struct ConfigSession {
    pub command: String,
    pub user: String,
}

#[derive(Debug, Eq, PartialEq, Default)]
pub struct ConfigInternal {
    pub session_worker: usize,
}

#[derive(Debug, Eq, PartialEq, Default)]
pub struct ConfigTerminal {
    pub vt: VtSelection,
}

#[derive(Debug, Eq, PartialEq)]
pub struct ConfigGeneral {
    pub source_profile: bool,
}

impl Default for ConfigGeneral {
    fn default() -> Self {
        ConfigGeneral {
            source_profile: true,
        }
    }
}

#[derive(Debug, Eq, PartialEq, Default)]
pub struct ConfigFile {
    pub terminal: ConfigTerminal,
    pub general: ConfigGeneral,
    pub default_session: ConfigSession,
    pub initial_session: Option<ConfigSession>,
}

#[derive(Debug, Eq, PartialEq)]
pub struct Config {
    pub file: ConfigFile,
    pub internal: ConfigInternal,
}

fn print_usage(program: &str, opts: Options) {
    let brief = format!("Usage: {} [options]", program);
    println!("{}", opts.usage(&brief));
    println!("For more details, see greetd(1).");
}

fn maybe_unquote(s: &str) -> Result<String, Error> {
    Ok(match s.chars().next() {
        Some('"') | Some('\'') => unquote(s).map_err(|e| Error::ConfigError(format!("{}", e)))?,
        _ => s.to_string(),
    })
}

fn parse_old_config(config: &HashMap<&str, HashMap<&str, &str>>) -> Result<ConfigFile, Error> {
    let general = config.get("").ok_or("no general section")?;

let greeterstr = general
        .get("greeter")
        .ok_or("unable to parse configuration file: no greeter specified")?;
    let greeter = maybe_unquote(greeterstr)?;

let greeter_userstr = general.get("greeter_user").unwrap_or(&"greeter");
    let greeter_user = maybe_unquote(greeter_userstr)?;

let vtstr = general
        .get("vt")
        .ok_or("unable to parse configuration file: no VT specified")?;
    let vt: VtSelection = match maybe_unquote(vtstr)?.as_str() {
        "none" | "\"none\"" => VtSelection::None,
        "current" | "\"current\"" => VtSelection::Current,
        "next" | "\"next\"" => VtSelection::Next,
        v => VtSelection::Specific(
            v.parse()
                .map_err(|e| format!("could not parse vt number: {}", e))?,
        ),
    };

Ok(ConfigFile {
        terminal: ConfigTerminal { vt },
        default_session: ConfigSession {
            user: greeter_user,
            command: greeter,
        },
        general: Default::default(),
        initial_session: None,
    })
}

fn parse_new_config(config: &HashMap<&str, HashMap<&str, &str>>) -> Result<ConfigFile, Error> {
    let default_session = match config.get("default_session") {
        Some(section) => {
            let commandstr = section
                .get("command")
                .ok_or("default_session contains no command")?;
            let command = maybe_unquote(commandstr)
                .map_err(|e| format!("unable to read default_session.command: {}", e))?;

let userstr = section.get("user").unwrap_or(&"greeter");
            let user = maybe_unquote(userstr)
                .map_err(|e| format!("unable to read default_session.user: {}", e))?;

Ok(ConfigSession { command, user })
        }
        None => Err("no default_session specified"),
    }?;

let initial_session = match config.get("initial_session") {
        Some(section) => {
            let commandstr = section
                .get("command")
                .ok_or("initial_session contains no command")?;
            let command = maybe_unquote(commandstr)
                .map_err(|e| format!("unable to read initial_session.command: {}", e))?;

let userstr = section
                .get("user")
                .ok_or("initial_session contains no user")?;
            let user = maybe_unquote(userstr)
                .map_err(|e| format!("unable to read initial_session.user: {}", e))?;

Some(ConfigSession { command, user })
        }
        None => None,
    };

let terminal = match config.get("terminal") {
        Some(section) => Ok(ConfigTerminal {
            vt: match maybe_unquote(section.get("vt").ok_or("VT not specified")?)
                .map_err(|e| format!("unable to read terminal.vt: {}", e))?
                .as_str()
            {
                "none" | "\"none\"" => VtSelection::None,
                "current" | "\"current\"" => VtSelection::Current,
                "next" | "\"next\"" => VtSelection::Next,
                v => VtSelection::Specific(
                    v.parse()
                        .map_err(|e| format!("could not parse vt number: {}", e))?,
                ),
            },
        }),
        None => Err("no terminal specified"),
    }?;

let general = match config.get("general") {
        Some(section) => ConfigGeneral {
            source_profile: section
                .get("source_profile")
                .unwrap_or(&"true")
                .parse()
                .map_err(|e| format!("could not parse source_profile: {}", e))?,
        },
        None => Default::default(),
    };

Ok(ConfigFile {
        initial_session,
        default_session,
        general,
        terminal,
    })
}

fn parse_config(config_str: &str) -> Result<ConfigFile, Error> {
    let config_ini = inish::parse(config_str)?;
    match parse_new_config(&config_ini) {
        Ok(v) => Ok(v),
        Err(e) => match parse_old_config(&config_ini) {
            Ok(v) => {
                eprintln!("warning: Fallback to old config format, caused by : {}", e);
                Ok(v)
            }
            Err(_e) => Err(Error::ConfigError(format!(
                "unable to parse configuration file: {}",
                e
            ))),
        },
    }
}

pub fn read_config() -> Result<Config, Error> {
    let args: Vec<String> = env::args().collect();
    let program = args[0].clone();
    let mut opts = Options::new();
    opts.optflag("h", "help", "print this help menu");
    opts.optopt("s", "socket-path", "socket path to use", "SOCKET_PATH");
    opts.optopt("c", "config", "config file to use", "CONFIG_FILE");
    opts.optopt(
        "w",
        "session-worker",
        "start a session worker (internal)",
        "FD",
    );
    let matches = match opts.parse(&args[1..]) {
        Ok(m) => m,
        Err(f) => return Err(format!("could not parse arguments: {}", f).into()),
    };
    if matches.opt_present("h") {
        print_usage(&program, opts);
        std::process::exit(0);
    }

let internal = ConfigInternal {
        session_worker: matches
            .opt_get("session-worker")
            .expect("unable to parse session-worker")
            .unwrap_or(0),
    };

if internal.session_worker > 0 {
        return Ok(Config {
            file: Default::default(),
            internal,
        });
    }

let config_str = match matches.opt_str("config") {
        Some(v) => read_to_string(v),
        None => read_to_string("/etc/greetd/greetd.conf")
            .or_else(|_| read_to_string("/etc/greetd/config.toml")),
    }?;
    let file = parse_config(&config_str)?;

if file.default_session.command.is_empty() {
        return Err(Error::ConfigError(
            "no default session user specified".to_string(),
        ));
    }
    if file.default_session.user.is_empty() {
        return Err(Error::ConfigError(
            "no default session user specified".to_string(),
        ));
    }
    if let Some(s) = &file.initial_session {
        if s.user.is_empty() {
            return Err(Error::ConfigError(
                "initial session enabled but contained no user".to_string(),
            ));
        }
        if s.command.is_empty() {
            return Err(Error::ConfigError(
                "initial session enabled but contained no command".to_string(),
            ));
        }
    }

Ok(Config { file, internal })
}

#[cfg(test)]
mod tests {
    use super::*;

#[test]
    fn old_config() {
        let config = parse_config(
            "
vt = 1
greeter = \"agreety\"
greeter_user = \"greeter\"
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Specific(1)
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: Default::default(),
                initial_session: None,
            }
        );

let config = parse_config(
            "
vt = \"next\"
greeter = \"agreety\"
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Next
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: Default::default(),
                initial_session: None,
            }
        );
    }

#[test]
    fn minimal_config() {
        let config = parse_config(
            "
[terminal]
vt = 1
[default_session]
command = \"agreety\"
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Specific(1)
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: Default::default(),
                initial_session: None,
            }
        );
    }

#[test]
    fn initial_session() {
        let config = parse_config(
            "
[terminal]\nvt = 1\n[default_session]\ncommand = \"agreety\"
[initial_session]
command = \"sway\"
user = \"john\"
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Specific(1)
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: Default::default(),
                initial_session: Some(ConfigSession {
                    command: "sway".to_string(),
                    user: "john".to_string(),
                }),
            }
        );
    }

#[test]
    fn general() {
        let config = parse_config(
            "
[terminal]\nvt = 1\n[default_session]\ncommand = \"agreety\"
[general]
source_profile = false
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Specific(1)
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: ConfigGeneral {
                    source_profile: false,
                },
                initial_session: None,
            }
        );
    }

#[test]
    fn invalid_general() {
        assert!(parse_config(
            "
[terminal]\nvt = 1\n[default_session]\ncommand = \"agreety\"
[general]
source_profile = fals
",
        )
        .is_err())
    }

#[test]
    fn terminal() {
        let config = parse_config(
            "
[default_session]\ncommand = \"agreety\"
[terminal]
vt = 1
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Specific(1)
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: Default::default(),
                initial_session: None,
            }
        );
        let config = parse_config(
            "
[default_session]\ncommand = \"agreety\"
[terminal]
vt = next
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Next
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: Default::default(),
                initial_session: None,
            }
        );
        let config = parse_config(
            "
[default_session]\ncommand = \"agreety\"
[terminal]
vt = current
",
        )
        .expect("config didn't parse");
        assert_eq!(
            config,
            ConfigFile {
                terminal: ConfigTerminal {
                    vt: VtSelection::Current
                },
                default_session: ConfigSession {
                    command: "agreety".to_string(),
                    user: "greeter".to_string(),
                },
                general: Default::default(),
                initial_session: None,
            }
        );
    }

#[test]
    fn invalid_initial_session() {
        assert!(parse_config(
            "
[terminal]\nvt = 1\n[default_session]\ncommand = \"agreety\"
[initial_session]
"
        )
        .is_err());
        assert!(parse_config(
            "
[terminal]\nvt = 1\n[default_session]\ncommand = \"agreety\"
[initial_session]
command = \"sway\"
"
        )
        .is_err());
        assert!(parse_config(
            "
[terminal]\nvt = 1\n[default_session]\ncommand = \"agreety\"
[initial_session]
user = \"user\"
"
        )
        .is_err());
    }

#[test]
    fn invalid_default_session() {
        assert!(parse_config(
            "
[terminal]\nvt = 1
[default_session]
"
        )
        .is_err());
        assert!(parse_config(
            "
[terminal]\nvt = 1
[default_session]
user = \"john\"
"
        )
        .is_err());
    }
}
07070100000017000081A4000003E800000064000000015FE1D8AC0000344F000000000000000000000000000000000000002300000000greetd-0.7.0/greetd/src/context.rsuse std::time::{Duration, Instant};

use nix::{
    sys::wait::{waitpid, WaitPidFlag, WaitStatus},
    unistd::alarm,
};
use tokio::{sync::RwLock, time::delay_for};

use crate::{
    error::Error,
    session::{
        interface::{Session, SessionChild, SessionState},
        worker::{AuthMessageType as SessAuthMessageType, TerminalMode},
    },
};
use greetd_ipc::AuthMessageType;

struct SessionChildSet {
    child: SessionChild,
    time: Instant,
    is_greeter: bool,
}

struct SessionSet {
    session: Session,
    time: Instant,
}

struct ContextInner {
    current: Option<SessionChildSet>,
    scheduled: Option<SessionSet>,
    configuring: Option<SessionSet>,
}

/// Context keeps track of running sessions and start new ones.
pub struct Context {
    inner: RwLock<ContextInner>,
    greeter_bin: String,
    greeter_user: String,
    greeter_service: String,
    pam_service: String,
    term_mode: TerminalMode,
    source_profile: bool,
}

impl Context {
    pub fn new(
        greeter_bin: String,
        greeter_user: String,
        greeter_service: String,
        pam_service: String,
        term_mode: TerminalMode,
        source_profile: bool,
    ) -> Context {
        Context {
            inner: RwLock::new(ContextInner {
                current: None,
                scheduled: None,
                configuring: None,
            }),
            greeter_bin,
            greeter_user,
            greeter_service,
            pam_service,
            term_mode,
            source_profile,
        }
    }

/// Directly start an unauthenticated session, bypassing the normal
    /// scheduling. This function does not take the inner lock, and can thus
    /// be used while it is held.
    async fn start_unauthenticated_session(
        &self,
        class: &str,
        user: &str,
        service: &str,
        cmd: Vec<String>,
    ) -> Result<SessionChild, Error> {
        let mut scheduled_session = Session::new_external()?;
        scheduled_session
            .initiate(
                &service,
                class,
                user,
                false,
                &self.term_mode,
                self.source_profile,
            )
            .await?;
        loop {
            match scheduled_session.get_state().await {
                Ok(SessionState::Ready) => break,
                Ok(SessionState::Question(_, _)) => scheduled_session.post_response(None).await?,
                Err(err) => return Err(format!("session start failed: {}", err).into()),
            }
        }

scheduled_session.send_args(cmd).await?;
        scheduled_session.start().await
    }

/// Directly start a greeter session, bypassing the normal scheduling. This
    /// function does not take the inner lock, and can thus be used while it is
    /// held.
    async fn start_greeter(&self) -> Result<SessionChild, Error> {
        self.start_unauthenticated_session(
            "greeter",
            &self.greeter_user,
            &self.greeter_service,
            vec![self.greeter_bin.to_string()],
        )
        .await
    }

/// Directly start a greeter session, bypassing the normal scheduling.
    pub async fn greet(&self) -> Result<(), Error> {
        {
            let inner = self.inner.read().await;
            if inner.current.is_some() {
                return Err("session already active".into());
            }
        }

let mut inner = self.inner.write().await;
        inner.current = Some(SessionChildSet {
            child: self.start_greeter().await?,
            time: Instant::now(),
            is_greeter: true,
        });
        Ok(())
    }

/// Directly start an initial session, bypassing the normal scheduling.
    pub async fn start_user_session(&self, user: &str, cmd: Vec<String>) -> Result<(), Error> {
        {
            let inner = self.inner.read().await;
            if inner.current.is_some() {
                return Err("session already active".into());
            }
        }

let mut inner = self.inner.write().await;
        inner.current = Some(SessionChildSet {
            child: self
                .start_unauthenticated_session("user", user, &self.pam_service, cmd)
                .await?,
            time: Instant::now(),
            is_greeter: false,
        });
        Ok(())
    }

/// Create a new session for configuration.
    pub async fn create_session(&self, username: String) -> Result<(), Error> {
        {
            let inner = self.inner.read().await;
            if inner.current.is_none() {
                return Err("session not active".into());
            }
            if inner.configuring.is_some() {
                return Err("a session is already being configured".into());
            }
            if inner.scheduled.is_some() {
                return Err("a session is already scheduled".into());
            }
        }

let mut session_set = SessionSet {
            session: Session::new_external()?,
            time: Instant::now(),
        };
        session_set
            .session
            .initiate(
                &self.pam_service,
                "user",
                &username,
                true,
                &self.term_mode,
                self.source_profile,
            )
            .await?;

let mut session = Some(session_set);
        let mut inner = self.inner.write().await;
        std::mem::swap(&mut session, &mut inner.configuring);
        drop(inner);

// If there was a session under configuration, cancel it.
        if let Some(mut s) = session {
            s.session.cancel().await?;
        }

Ok(())
    }

/// Cancel the session being configured.
    pub async fn cancel(&self) -> Result<(), Error> {
        let mut inner = self.inner.write().await;
        if let Some(mut s) = inner.configuring.take() {
            s.session.cancel().await?;
        }
        Ok(())
    }

/// Retrieve a question from the session under configuration.
    pub async fn get_question(&self) -> Result<Option<(AuthMessageType, String)>, Error> {
        let mut inner = self.inner.write().await;
        match &mut inner.configuring {
            Some(s) => match s.session.get_state().await? {
                SessionState::Ready => Ok(None),
                SessionState::Question(style, string) => Ok(Some((
                    match style {
                        SessAuthMessageType::Visible => AuthMessageType::Visible,
                        SessAuthMessageType::Secret => AuthMessageType::Secret,
                        SessAuthMessageType::Info => AuthMessageType::Info,
                        SessAuthMessageType::Error => AuthMessageType::Error,
                    },
                    string,
                ))),
            },
            None => Err("no session under configuration".into()),
        }
    }

/// Answer a question to the session under configuration.
    pub async fn post_response(&self, answer: Option<String>) -> Result<(), Error> {
        let mut inner = self.inner.write().await;
        match &mut inner.configuring {
            Some(s) => s.session.post_response(answer).await,
            None => Err("no session under configuration".into()),
        }
    }

/// Schedule the session under configuration with the provided arguments.
    pub async fn start(&self, cmd: Vec<String>) -> Result<(), Error> {
        let mut session = self.inner.write().await.configuring.take();

match &mut session {
            Some(s) => match s.session.get_state().await? {
                SessionState::Ready => {
                    // Send our arguments to the session.
                    s.session.send_args(cmd).await?;

let mut inner = self.inner.write().await;
                    std::mem::swap(&mut session, &mut inner.scheduled);
                    drop(inner);

// If there was a scheduled session, cancel it.
                    if let Some(mut p) = session {
                        p.session.cancel().await?;
                    }

// We give the greeter 5 seconds to prove itself well-behaved before
                    // we lose patience and shoot it in the back repeatedly. This is all
                    // handled by our alarm handler.
                    alarm::set(5);

Ok(())
                }
                SessionState::Question(..) => Err("session is not ready".into()),
            },
            None => Err("no session active".into()),
        }
    }

/// Notify the Context of an alarm.
    pub async fn alarm(&self) -> Result<(), Error> {
        // Keep trying to terminate the greeter until it gives up.
        let mut inner = self.inner.write().await;

if let Some(mut p) = inner.scheduled.take() {
            if let Some(g) = inner.current.take() {
                if p.time.elapsed() > Duration::from_secs(10) {
                    // We're out of patience.
                    g.child.kill();
                } else {
                    // Let's try to give it a gentle nudge.
                    g.child.term();
                }
                inner.current = Some(g);
                inner.scheduled = Some(p);
                alarm::set(1);
                return Ok(());
            }
            drop(inner);
            let s = match p.session.start().await {
                Ok(s) => s,
                Err(e) => return Err(format!("session start failed: {}", e).into()),
            };
            let mut inner = self.inner.write().await;
            inner.current = Some(SessionChildSet {
                child: s,
                time: Instant::now(),
                is_greeter: false,
            });
        }

Ok(())
    }

/// Notify the Context that it needs to check its children for termination.
    /// This should be called on SIGCHLD.
    pub async fn check_children(&self) -> Result<(), Error> {
        loop {
            match waitpid(None, Some(WaitPidFlag::WNOHANG)) {
                // No scheduled exits.
                Ok(WaitStatus::StillAlive) => break Ok(()),

// We got an exit, see if it's something we need to clean up.
                Ok(WaitStatus::Exited(pid, ..)) | Ok(WaitStatus::Signaled(pid, ..)) => {
                    let mut inner = self.inner.write().await;
                    let (was_greeter, sesion_length) = match &inner.current {
                        Some(s) if s.child.owns_pid(pid) => {
                            let res = (s.is_greeter, s.time.elapsed());
                            inner.current = None;
                            res
                        }
                        _ => continue,
                    };

match inner.scheduled.take() {
                        Some(mut scheduled) => {
                            // Our greeter finally bit the dust so we can
                            // start our scheduled session.
                            drop(inner);
                            let s = match scheduled.session.start().await {
                                Ok(s) => s,
                                Err(e) => return Err(format!("session start failed: {}", e).into()),
                            };
                            let mut inner = self.inner.write().await;
                            inner.current = Some(SessionChildSet {
                                child: s,
                                time: Instant::now(),
                                is_greeter: false,
                            });
                        }
                        None => {
                            if was_greeter {
                                return Err("greeter exited without creating a session".into());
                            }
                            if sesion_length < Duration::from_secs(1) {
                                delay_for(Duration::from_secs(1)).await;
                            }
                            inner.current = Some(SessionChildSet {
                                child: self.start_greeter().await?,
                                time: Instant::now(),
                                is_greeter: true,
                            });
                        }
                    }
                }

// Useless status.
                Ok(_) => continue,

// Interrupted.
                Err(nix::Error::Sys(nix::errno::Errno::EINTR)) => continue,

// We do not have any children right now.
                Err(nix::Error::Sys(nix::errno::Errno::ECHILD)) => break Ok(()),

// Uh, what?
                Err(e) => panic!("waitpid returned an unexpected error: {}", e),
            }
        }
    }

/// Notify the Context that we want to terminate. This should be called on
    /// SIGTERM.
    pub async fn terminate(&self) -> Result<(), Error> {
        let mut inner = self.inner.write().await;
        if let Some(mut sess) = inner.configuring.take() {
            let _ = sess.session.cancel().await;
        }
        if let Some(mut sess) = inner.scheduled.take() {
            let _ = sess.session.cancel().await;
        }
        if let Some(sess) = inner.current.take() {
            sess.child.term();
        }
        Ok(())
    }
}
07070100000018000081A4000003E800000064000000015FE1D8AC0000076E000000000000000000000000000000000000002100000000greetd-0.7.0/greetd/src/error.rsuse std::convert::From;

use serde::{Deserialize, Serialize};
use thiserror::Error as ThisError;

#[derive(Debug, ThisError, Clone, Deserialize, Serialize)]
pub enum Error {
    #[error("{0}")]
    Error(String),

#[error("authentication error: {0}")]
    AuthError(String),

#[error("protocol error: {0}")]
    ProtocolError(String),

#[error("i/o error: {0}")]
    Io(String),

#[error("configuration error: {0}")]
    ConfigError(String),
}

impl From<Box<dyn std::error::Error>> for Error {
    fn from(error: Box<dyn std::error::Error>) -> Self {
        Error::Error(format!("{}", error))
    }
}

impl From<std::io::Error> for Error {
    fn from(error: std::io::Error) -> Self {
        Error::Io(format!("{}", error))
    }
}

impl From<crate::pam::PamError> for Error {
    fn from(error: crate::pam::PamError) -> Self {
        Error::AuthError(error.to_string())
    }
}

impl From<String> for Error {
    fn from(error: String) -> Self {
        Error::Error(error)
    }
}

impl From<&str> for Error {
    fn from(error: &str) -> Self {
        Error::Error(error.to_string())
    }
}

impl From<serde_json::error::Error> for Error {
    fn from(error: serde_json::error::Error) -> Self {
        Error::ProtocolError(error.to_string())
    }
}

impl From<nix::Error> for Error {
    fn from(error: nix::Error) -> Self {
        Error::Error(error.to_string())
    }
}

impl From<std::ffi::NulError> for Error {
    fn from(error: std::ffi::NulError) -> Self {
        Error::Error(error.to_string())
    }
}
07070100000019000081A4000003E800000064000000015FE1D8AC000005AD000000000000000000000000000000000000002000000000greetd-0.7.0/greetd/src/main.rsmod config;
mod context;
mod error;
mod pam;
mod scrambler;
mod server;
mod session;
mod terminal;

use std::os::unix::{
    io::{FromRawFd, RawFd},
    net::UnixDatagram,
};

use nix::{
    fcntl::{fcntl, FcntlArg, FdFlag},
    sys::mman::{mlockall, MlockAllFlags},
};
use tokio::task;

use crate::{error::Error, session::worker};

async fn session_worker_main(config: config::Config) -> Result<(), Error> {
    let raw_fd = config.internal.session_worker as RawFd;
    let mut cur_flags = unsafe { FdFlag::from_bits_unchecked(fcntl(raw_fd, FcntlArg::F_GETFD)?) };
    cur_flags.insert(FdFlag::FD_CLOEXEC);
    fcntl(raw_fd, FcntlArg::F_SETFD(cur_flags))?;
    let sock = unsafe { UnixDatagram::from_raw_fd(raw_fd) };
    worker::main(&sock)
}

#[tokio::main]
async fn main() {
    let config = match config::read_config() {
        Ok(config) => config,
        Err(e) => {
            eprintln!("{}", e);
            std::process::exit(1);
        }
    };
    if cfg!(feature = "debug") {
        eprintln!("config: {:?}", config);
    }
    mlockall(MlockAllFlags::all()).expect("unable to lock pages");
    let res = task::LocalSet::new()
        .run_until(async move {
            if config.internal.session_worker > 0 {
                session_worker_main(config).await
            } else {
                server::main(config).await
            }
        })
        .await;
    if let Err(e) = res {
        eprintln!("error: {}", e);
    }
}
0707010000001A000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001C00000000greetd-0.7.0/greetd/src/pam0707010000001B000081A4000003E800000064000000015FE1D8AC0000055F000000000000000000000000000000000000002800000000greetd-0.7.0/greetd/src/pam/converse.rs/// A trait representing the PAM authentification conversation
///
/// PAM authentification is done as a conversation mechanism, in which PAM
/// asks several questions and the client (your code) answers them. This trait
/// is a representation of such a conversation, which one method for each message
/// PAM can send you.
///
/// This is the trait to implement if you want to customize the conversation with
/// PAM. If you just want a simple login/password authentication, you can use the
/// `PasswordConv` implementation provided by this crate.
pub trait Converse {
    /// PAM requests a value that should be echoed to the user as they type it
    ///
    /// This would typically be the username. The exact question is provided as the
    /// `msg` argument if you wish to display it to your user.
    fn prompt_echo(&self, msg: &str) -> ::std::result::Result<String, ()>;
    /// PAM requests a value that should be typed blindly by the user
    ///
    /// This would typically be the password. The exact question is provided as the
    /// `msg` argument if you wish to display it to your user.
    fn prompt_blind(&self, msg: &str) -> ::std::result::Result<String, ()>;
    /// This is an informational message from PAM
    fn info(&self, msg: &str) -> Result<(), ()>;
    /// This is an error message from PAM
    fn error(&self, msg: &str) -> Result<(), ()>;
}
0707010000001C000081A4000003E800000064000000015FE1D8AC00000426000000000000000000000000000000000000002300000000greetd-0.7.0/greetd/src/pam/env.rsuse std::ffi::CStr;

use libc::c_char;
use pam_sys::{getenvlist, raw, PamHandle};

pub struct PamEnvList {
    ptr: *const *const c_char,
}

pub fn get_pam_env(handle: &mut PamHandle) -> Option<PamEnvList> {
    let env = getenvlist(handle);
    if !env.is_null() {
        Some(PamEnvList { ptr: env })
    } else {
        None
    }
}

impl<'a> PamEnvList {
    pub fn to_vec(&'a self) -> Vec<&'a CStr> {
        let mut vec = Vec::new();
        let mut idx = 0;
        loop {
            let env_ptr: *const *const c_char = unsafe { self.ptr.offset(idx) };
            if unsafe { !(*env_ptr).is_null() } {
                idx += 1;

let env = unsafe { CStr::from_ptr(*env_ptr) };
                vec.push(env);
            } else {
                // Reached the end of the env array -> break out of the loop
                break;
            }
        }

vec
    }
}

#[cfg(target_os = "linux")]
impl Drop for PamEnvList {
    fn drop(&mut self) {
        unsafe { raw::pam_misc_drop_env(self.ptr as *mut *mut c_char) };
    }
}
0707010000001D000081A4000003E800000064000000015FE1D8AC00000D87000000000000000000000000000000000000002300000000greetd-0.7.0/greetd/src/pam/ffi.rsuse std::{
    ffi::{CStr, CString},
    mem,
    pin::Pin,
};

use libc::{c_int, c_void, calloc, free, size_t, strdup};
use pam_sys::{PamConversation, PamMessage, PamMessageStyle, PamResponse, PamReturnCode};

use super::converse::Converse;

pub struct PamConvHandlerWrapper<'a> {
    pub handler: Pin<Box<dyn Converse + 'a>>,
}

pub fn make_conversation(conv: &mut PamConvHandlerWrapper) -> PamConversation {
    PamConversation {
        conv: Some(converse),
        data_ptr: conv as *mut PamConvHandlerWrapper as *mut c_void,
    }
}

pub extern "C" fn converse(
    num_msg: c_int,
    msg: *mut *mut PamMessage,
    out_resp: *mut *mut PamResponse,
    appdata_ptr: *mut c_void,
) -> c_int {
    // allocate space for responses
    let resp = unsafe {
        calloc(num_msg as usize, mem::size_of::<PamResponse>() as size_t) as *mut PamResponse
    };
    if resp.is_null() {
        return PamReturnCode::BUF_ERR as c_int;
    }

let wrapper = unsafe { &*(appdata_ptr as *const PamConvHandlerWrapper) };

let mut result: PamReturnCode = PamReturnCode::SUCCESS;
    for i in 0..num_msg as isize {
        // get indexed values
        let m: &mut PamMessage = unsafe { &mut **(msg.offset(i)) };
        let r: &mut PamResponse = unsafe { &mut *(resp.offset(i)) };
        let msg = unsafe { CStr::from_ptr(m.msg) };
        let msg = match msg.to_str() {
            Ok(m) => m,
            Err(_) => {
                result = PamReturnCode::CONV_ERR;
                break;
            }
        };
        // match on msg_style
        match PamMessageStyle::from(m.msg_style) {
            PamMessageStyle::PROMPT_ECHO_ON => {
                if let Ok(handler_response) = wrapper.handler.prompt_echo(msg) {
                    let cstr =
                        CString::new(handler_response).expect("unable to allocate response string");
                    r.resp = unsafe { strdup(cstr.as_ptr()) };
                } else {
                    result = PamReturnCode::CONV_ERR;
                }
            }
            PamMessageStyle::PROMPT_ECHO_OFF => {
                if let Ok(handler_response) = wrapper.handler.prompt_blind(msg) {
                    let cstr =
                        CString::new(handler_response).expect("unable to allocate response string");
                    r.resp = unsafe { strdup(cstr.as_ptr()) };
                } else {
                    result = PamReturnCode::CONV_ERR;
                }
            }
            PamMessageStyle::ERROR_MSG => {
                if wrapper.handler.error(msg).is_err() {
                    result = PamReturnCode::CONV_ERR;
                }
            }
            PamMessageStyle::TEXT_INFO => {
                if wrapper.handler.info(msg).is_err() {
                    result = PamReturnCode::CONV_ERR;
                }
            }
        }
        if result != PamReturnCode::SUCCESS {
            break;
        }
    }

// free allocated memory if an error occured
    if result != PamReturnCode::SUCCESS {
        // Free any strdup'd response strings
        for i in 0..num_msg as isize {
            let r: &mut PamResponse = unsafe { &mut *(resp.offset(i)) };
            if !r.resp.is_null() {
                unsafe { free(r.resp as *mut c_void) };
            }
        }

// Free the response array
        unsafe { free(resp as *mut c_void) };
    } else {
        unsafe { *out_resp = resp };
    }

result as c_int
}
0707010000001E000081A4000003E800000064000000015FE1D8AC000003CC000000000000000000000000000000000000002300000000greetd-0.7.0/greetd/src/pam/mod.rspub mod converse;
mod env;
mod ffi;
pub mod session;

use thiserror::Error as ThisError;

use pam_sys::PamReturnCode;

#[derive(Debug, ThisError)]
pub enum PamError {
    #[error("{0}")]
    Error(String),
    #[error("{0}")]
    AuthError(String),
    #[error("abort error: {0}")]
    AbortError(String),
}

impl PamError {
    pub fn from_rc(prefix: &str, rc: PamReturnCode) -> PamError {
        match rc {
            PamReturnCode::ABORT => PamError::AbortError(format!("{}: {:?}", prefix, rc)),
            PamReturnCode::AUTH_ERR
            | PamReturnCode::MAXTRIES
            | PamReturnCode::CRED_EXPIRED
            | PamReturnCode::ACCT_EXPIRED
            | PamReturnCode::CRED_INSUFFICIENT
            | PamReturnCode::USER_UNKNOWN
            | PamReturnCode::PERM_DENIED
            | PamReturnCode::SERVICE_ERR => PamError::AuthError(format!("{}: {:?}", prefix, rc)),
            _ => PamError::Error(format!("{}: {:?}", prefix, rc)),
        }
    }
}
0707010000001F000081A4000003E800000064000000015FE1D8AC000011A9000000000000000000000000000000000000002700000000greetd-0.7.0/greetd/src/pam/session.rsuse std::{
    ffi::{CStr, CString},
    os::raw::c_char,
    pin::Pin,
    ptr,
};

use libc::c_void;
use pam_sys::{PamFlag, PamHandle, PamItemType, PamReturnCode};

use super::{
    converse::Converse,
    env::{get_pam_env, PamEnvList},
    ffi::{make_conversation, PamConvHandlerWrapper},
    PamError,
};

pub struct PamSession<'a> {
    handle: &'a mut PamHandle,
    #[allow(unused)]
    lifetime_extender: Pin<Box<PamConvHandlerWrapper<'a>>>,
    last_code: PamReturnCode,
}

impl<'a> PamSession<'a> {
    pub fn start(
        service: &str,
        user: &'a str,
        pam_conv: Pin<Box<dyn Converse + 'a>>,
    ) -> Result<PamSession<'a>, PamError> {
        let mut pch = Box::pin(PamConvHandlerWrapper { handler: pam_conv });
        let conv = make_conversation(&mut *pch);
        let mut pam_handle: *mut PamHandle = ptr::null_mut();

match pam_sys::start(service, Some(user), &conv, &mut pam_handle) {
            PamReturnCode::SUCCESS => Ok(PamSession {
                handle: unsafe { &mut *pam_handle },
                lifetime_extender: pch,
                last_code: PamReturnCode::SUCCESS,
            }),
            rc => Err(PamError::from_rc("pam_start", rc)),
        }
    }

pub fn authenticate(&mut self, flags: PamFlag) -> Result<(), PamError> {
        self.last_code = pam_sys::authenticate(self.handle, flags);
        match self.last_code {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_authenticate", rc)),
        }
    }

pub fn acct_mgmt(&mut self, flags: PamFlag) -> Result<(), PamError> {
        self.last_code = pam_sys::acct_mgmt(self.handle, flags);
        match self.last_code {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_acct_mgmt", rc)),
        }
    }

pub fn setcred(&mut self, flags: PamFlag) -> Result<(), PamError> {
        self.last_code = pam_sys::setcred(self.handle, flags);
        match self.last_code {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_setcred", rc)),
        }
    }

pub fn open_session(&mut self, flags: PamFlag) -> Result<(), PamError> {
        self.last_code = pam_sys::open_session(self.handle, flags);
        match self.last_code {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_open_session", rc)),
        }
    }

pub fn close_session(&mut self, flags: PamFlag) -> Result<(), PamError> {
        self.last_code = pam_sys::close_session(self.handle, flags);
        match self.last_code {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_close_session", rc)),
        }
    }

pub fn putenv(&mut self, v: &str) -> Result<(), PamError> {
        self.last_code = pam_sys::putenv(self.handle, v);
        match self.last_code {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_putenv", rc)),
        }
    }

pub fn set_item(&mut self, item: PamItemType, value: &str) -> Result<(), PamError> {
        let s = CString::new(value).unwrap();
        self.last_code = PamReturnCode::from(unsafe {
            // pam_set_item is exposed in a weird way in pam_sys::wrapped, so
            // we use the raw version here instead
            pam_sys::raw::pam_set_item(self.handle, item as i32, s.as_ptr() as *const c_void)
        });
        match self.last_code {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_set_item", rc)),
        }
    }

pub fn get_user(&mut self) -> Result<String, PamError> {
        let mut p: *const c_char = ptr::null_mut();
        self.last_code = pam_sys::get_user(self.handle, &mut p, ptr::null());
        match self.last_code {
            PamReturnCode::SUCCESS => {
                Ok((unsafe { CStr::from_ptr(p) }).to_str().unwrap().to_string())
            }
            rc => Err(PamError::from_rc("pam_get_user", rc)),
        }
    }

pub fn getenvlist(&mut self) -> Result<PamEnvList, PamError> {
        match get_pam_env(self.handle) {
            Some(v) => Ok(v),
            None => Err(PamError::Error(
                "unable to retrieve environment".to_string(),
            )),
        }
    }

pub fn end(&mut self) -> Result<(), PamError> {
        match pam_sys::end(self.handle, self.last_code) {
            PamReturnCode::SUCCESS => Ok(()),
            rc => Err(PamError::from_rc("pam_end", rc)),
        }
    }
}
07070100000020000081A4000003E800000064000000015FE1D8AC000002B3000000000000000000000000000000000000002500000000greetd-0.7.0/greetd/src/scrambler.rsuse std::default::Default;

/// Scrambling overwrites a buffers content with the default value. Useful to
/// avoid leaving behind a heap littered with old secrets.
pub trait Scrambler {
    fn scramble(&mut self);
}

impl<T: Default> Scrambler for Vec<T> {
    fn scramble(&mut self) {
        let cap = self.capacity();
        self.truncate(0);
        for _ in 0..cap {
            self.push(Default::default())
        }
        self.truncate(0);
    }
}

impl Scrambler for String {
    fn scramble(&mut self) {
        let cap = self.capacity();
        self.truncate(0);
        for _ in 0..cap {
            self.push(Default::default())
        }
        self.truncate(0);
    }
}
07070100000021000081A4000003E800000064000000015FE1D8AC000025DD000000000000000000000000000000000000002200000000greetd-0.7.0/greetd/src/server.rsuse std::{path::Path, rc::Rc};

use nix::unistd::{chown, getpid, Gid, Uid};
use tokio::{
    net::{UnixListener, UnixStream},
    signal::unix::{signal, SignalKind},
    task,
};

use crate::{
    config::{Config, VtSelection},
    context::Context,
    error::Error,
    session::worker::TerminalMode,
    terminal::{self, Terminal},
};
use greetd_ipc::{
    codec::{Error as CodecError, TokioCodec},
    ErrorType, Request, Response,
};

fn reset_vt(term_mode: &TerminalMode) -> Result<(), Error> {
    match term_mode {
        TerminalMode::Terminal { path, vt, .. } => {
            let term = Terminal::open(path)?;
            term.kd_setmode(terminal::KdMode::Text)?;
            term.vt_setactivate(*vt)?;
        }
        TerminalMode::Stdin => (),
    }
    Ok(())
}

let resp = match req {
            Request::CreateSession { username } => match ctx.create_session(username).await {
                Ok(()) => client_get_question(&ctx).await,
                res => wrap_result(res),
            },
            Request::PostAuthMessageResponse { response } => {
                match ctx.post_response(response).await {
                    Ok(()) => client_get_question(&ctx).await,
                    res => wrap_result(res),
                }
            }
            Request::StartSession { cmd } => wrap_result(ctx.start(cmd).await),
            Request::CancelSession => wrap_result(ctx.cancel().await),
        };

resp.write_to(&mut s).await?;
    }
}

// Return a TTY path and the TTY/VT number, based on the configured target.
//
// If the target is VtSelection::Current, return the path to the TTY
// referenced by stdin and the TTY number it is connected to if possible. If
// the referenced TTY is a PTY, fail. Otherwise, open tty0, get the current VT
// number, and return the path to that TTY and VT.
//
// If the target is VtSelection::Next, open tty0 and request the next VT
// number. Return the TTY and VT
//
// If the target is VtSelection::Specific, simply return the specified TTY and
// VT.
//
// If the target is VtSelection::None, return nothing.
fn get_tty(config: &Config) -> Result<TerminalMode, Error> {
    const TTY_PREFIX: &str = "/dev/tty";
    const PTS_PREFIX: &str = "/dev/pts";

let term = match config.file.terminal.vt {
        VtSelection::Current => {
            let term = Terminal::stdin();
            match term.ttyname() {
                // We have a usable terminal, so let's decipher and return that
                Ok(term_name)
                    if term_name.starts_with(TTY_PREFIX) && term_name.len() > TTY_PREFIX.len() =>
                {
                    let vt = term_name[TTY_PREFIX.len()..]
                        .parse()
                        .map_err(|e| Error::Error(format!("unable to parse tty number: {}", e)))?;

TerminalMode::Terminal {
                        path: term_name,
                        vt,
                        switch: false,
                    }
                }
                Ok(term_name) if term_name.starts_with(PTS_PREFIX) => {
                    return Err("cannot use current VT when started from a psuedo terminal".into())
                }
                // We don't have a usable terminal, so we have to jump through some hoops
                _ => {
                    let sys_term = Terminal::open("/dev/tty0")
                        .map_err(|e| format!("unable to open terminal: {}", e))?;
                    let vt = sys_term
                        .vt_get_current()
                        .map_err(|e| format!("unable to get current VT: {}", e))?;
                    TerminalMode::Terminal {
                        path: format!("/dev/tty{}", vt),
                        vt,
                        switch: false,
                    }
                }
            }
        }
        VtSelection::Next => {
            let term = Terminal::open("/dev/tty0")
                .map_err(|e| format!("unable to open terminal: {}", e))?;
            let vt = term
                .vt_get_next()
                .map_err(|e| format!("unable to get next VT: {}", e))?;
            TerminalMode::Terminal {
                path: format!("/dev/tty{}", vt),
                vt,
                switch: true,
            }
        }
        VtSelection::None => TerminalMode::Stdin,
        VtSelection::Specific(vt) => TerminalMode::Terminal {
            path: format!("/dev/tty{}", vt),
            vt,
            switch: true,
        },
    };
    return Ok(term);
}

// Listener is a convenience wrapper for creating the UnixListener we need, and
// for providing cleanup on Drop.
struct Listener(UnixListener);

impl Listener {
    fn create(uid: Uid, gid: Gid) -> Result<Listener, Error> {
        let path = format!("/run/greetd-{}.sock", getpid().as_raw());
        let _ = std::fs::remove_file(&path);
        let listener =
            UnixListener::bind(&path).map_err(|e| format!("unable to open listener: {}", e))?;
        chown(path.as_str(), Some(uid), Some(gid))
            .map_err(|e| format!("unable to chown greetd socket at {}: {}", path, e))?;
        std::env::set_var("GREETD_SOCK", path);
        Ok(Listener(listener))
    }
}

impl Drop for Listener {
    fn drop(&mut self) {
        let addr = match self.0.local_addr() {
            Ok(addr) => addr,
            Err(_) => return,
        };
        if let Some(path) = addr.as_pathname() {
            let _ = std::fs::remove_file(path);
        }
    }
}

pub async fn main(config: Config) -> Result<(), Error> {
    let service = if Path::new("/etc/pam.d/greetd").exists() {
        "greetd"
    } else if Path::new("/etc/pam.d/login").exists() {
        eprintln!("warning: PAM 'greetd' service missing, falling back to 'login'");
        "login"
    } else {
        return Err("PAM 'greetd' service missing".into());
    };

let greeter_service = if Path::new("/etc/pam.d/greetd-greeter").exists() {
        "greetd-greeter"
    } else {
        service
    };

let u = users::get_user_by_name(&config.file.default_session.user).ok_or(format!(
        "configured default session user '{}' not found",
        &config.file.default_session.user
    ))?;

let uid = Uid::from_raw(u.uid());
    let gid = Gid::from_raw(u.primary_group_id());

let mut listener = Listener::create(uid, gid)?;

let term_mode = get_tty(&config)?;

let ctx = Rc::new(Context::new(
        config.file.default_session.command,
        config.file.default_session.user,
        greeter_service.to_string(),
        service.to_string(),
        term_mode.clone(),
        config.file.general.source_profile,
    ));

if let Some(s) = config.file.initial_session {
        if let Err(e) = ctx.start_user_session(&s.user, vec![s.command]).await {
            eprintln!("unable to start greeter: {}", e);
            reset_vt(&term_mode).map_err(|e| format!("unable to reset VT: {}", e))?;

std::process::exit(1);
        }
    } else if let Err(e) = ctx.greet().await {
        eprintln!("unable to start greeter: {}", e);
        reset_vt(&term_mode).map_err(|e| format!("unable to reset VT: {}", e))?;

std::process::exit(1);
    }

let mut alarm = signal(SignalKind::alarm()).expect("unable to listen for SIGALRM");
    let mut child = signal(SignalKind::child()).expect("unable to listen for SIGCHLD");
    let mut term = signal(SignalKind::terminate()).expect("unable to listen for SIGTERM");
    let mut int = signal(SignalKind::interrupt()).expect("unable to listen for SIGINT");

loop {
        tokio::select! {
            _ = child.recv() => ctx.check_children().await.map_err(|e| format!("check_children: {}", e))?,
            _ = alarm.recv() => ctx.alarm().await.map_err(|e| format!("alarm: {}", e))?,
            _ = term.recv() => {
                ctx.terminate().await.map_err(|e| format!("terminate: {}", e))?;
                break;
            }
            _ = int.recv() => {
                ctx.terminate().await.map_err(|e| format!("terminate: {}", e))?;
                break;
            }
            stream = listener.0.accept() => match stream {
                Ok((stream, _)) => {
                    let client_ctx = ctx.clone();
                    task::spawn_local(async move {
                        if let Err(e) = client_handler(&client_ctx, stream).await {
                            client_ctx.cancel().await.expect("unable to cancel session");
                            eprintln!("client loop failed: {}", e);
                        }
                    });
                },
                Err(err) => return Err(format!("accept: {}", err).into()),
            }
        }
    }

Ok(())
}
07070100000022000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000002000000000greetd-0.7.0/greetd/src/session07070100000023000081A4000003E800000064000000015FE1D8AC00000772000000000000000000000000000000000000002800000000greetd-0.7.0/greetd/src/session/conv.rsuse super::worker::{AuthMessageType, ParentToSessionChild, SessionChildToParent};
use crate::pam::converse::Converse;

/// SessionConv is a PAM conversation implementation that forwards questions
/// over a socket.
pub struct SessionConv<'a> {
    sock: &'a std::os::unix::net::UnixDatagram,
}

impl<'a> SessionConv<'a> {
    fn question(&self, msg: &str, style: AuthMessageType) -> Result<Option<String>, ()> {
        let msg = SessionChildToParent::PamMessage {
            style,
            msg: msg.to_string(),
        };
        msg.send(self.sock)
            .map_err(|e| eprintln!("pam_conv: {}", e))?;

let msg =
            ParentToSessionChild::recv(self.sock).map_err(|e| eprintln!("pam_conv: {}", e))?;

match msg {
            ParentToSessionChild::PamResponse { resp, .. } => Ok(resp),
            ParentToSessionChild::Cancel => Err(()),
            _ => Err(()),
        }
    }

/// Create a new `PasswordConv` handler
    pub fn new(sock: &'a std::os::unix::net::UnixDatagram) -> SessionConv {
        SessionConv { sock }
    }
}

impl<'a> Converse for SessionConv<'a> {
    fn prompt_echo(&self, msg: &str) -> Result<String, ()> {
        match self.question(msg, AuthMessageType::Visible) {
            Ok(Some(response)) => Ok(response),
            _ => Err(()),
        }
    }
    fn prompt_blind(&self, msg: &str) -> Result<String, ()> {
        match self.question(msg, AuthMessageType::Secret) {
            Ok(Some(response)) => Ok(response),
            _ => Err(()),
        }
    }
    fn info(&self, msg: &str) -> Result<(), ()> {
        match self.question(msg, AuthMessageType::Info) {
            Ok(None) => Ok(()),
            _ => Err(()),
        }
    }
    fn error(&self, msg: &str) -> Result<(), ()> {
        match self.question(msg, AuthMessageType::Error) {
            Ok(None) => Ok(()),
            _ => Err(()),
        }
    }
}
07070100000024000081A4000003E800000064000000015FE1D8AC00001DEE000000000000000000000000000000000000002D00000000greetd-0.7.0/greetd/src/session/interface.rsuse std::{
    ffi::CString,
    os::unix::{io::AsRawFd, net::UnixDatagram},
};

use nix::{
    fcntl::{fcntl, FcntlArg, FdFlag},
    sys::signal::Signal,
    unistd::{execv, fork, ForkResult, Pid},
};

use async_trait::async_trait;

use tokio::net::UnixDatagram as TokioUnixDatagram;

use super::worker::{AuthMessageType, ParentToSessionChild, SessionChildToParent, TerminalMode};
use crate::error::Error;

#[async_trait]
trait AsyncRecv<T: Sized> {
    async fn recv(sock: &mut TokioUnixDatagram) -> Result<T, Error>;
}

#[async_trait]
trait AsyncSend {
    async fn send(&self, sock: &mut TokioUnixDatagram) -> Result<(), Error>;
}

#[async_trait]
impl AsyncSend for ParentToSessionChild {
    async fn send(&self, sock: &mut TokioUnixDatagram) -> Result<(), Error> {
        let out =
            serde_json::to_vec(self).map_err(|e| format!("unable to serialize message: {}", e))?;
        sock.send(&out)
            .await
            .map_err(|e| format!("unable to send message: {}", e))?;
        Ok(())
    }
}

#[async_trait]
impl AsyncRecv<SessionChildToParent> for SessionChildToParent {
    async fn recv(sock: &mut TokioUnixDatagram) -> Result<SessionChildToParent, Error> {
        let mut data = [0; 10240];
        let len = sock
            .recv(&mut data[..])
            .await
            .map_err(|e| format!("unable to recieve message: {}", e))?;
        let msg = serde_json::from_slice(&data[..len])
            .map_err(|e| format!("unable to deserialize message: {}", e))?;
        Ok(msg)
    }
}

/// SessionChild tracks the processes spawned by a session
pub struct SessionChild {
    pub task: Pid,
    pub sub_task: Pid,
}

impl SessionChild {
    /// Check if this session has this pid.
    pub fn owns_pid(&self, pid: Pid) -> bool {
        self.task == pid
    }

/// Send SIGTERM to the session child.
    pub fn term(&self) {
        let _ = nix::sys::signal::kill(self.sub_task, Signal::SIGTERM);
    }

/// Send SIGKILL to the session child.
    pub fn kill(&self) {
        let _ = nix::sys::signal::kill(self.sub_task, Signal::SIGKILL);
        let _ = nix::sys::signal::kill(self.task, Signal::SIGKILL);
    }
}

#[derive(Debug)]
pub enum SessionState {
    Question(AuthMessageType, String),
    Ready,
}

/// A device to initiate a logged in PAM session.
pub struct Session {
    task: Pid,
    sock: TokioUnixDatagram,
    last_msg: Option<SessionChildToParent>,
}

impl Session {
    /// Create a session started as an external process.
    pub fn new_external() -> Result<Session, Error> {
        // Pipe used to communicate the true PID of the final child.
        let (parentfd, childfd) =
            UnixDatagram::pair().map_err(|e| format!("could not create pipe: {}", e))?;

let raw_child = childfd.as_raw_fd();
        let mut cur_flags =
            unsafe { FdFlag::from_bits_unchecked(fcntl(raw_child, FcntlArg::F_GETFD)?) };
        cur_flags.remove(FdFlag::FD_CLOEXEC);
        fcntl(raw_child, FcntlArg::F_SETFD(cur_flags))?;

let cur_exe = std::env::current_exe()?;
        let bin = CString::new(cur_exe.to_str().expect("unable to get current exe name"))?;

let child = match fork().map_err(|e| format!("unable to fork: {}", e))? {
            ForkResult::Parent { child, .. } => child,
            ForkResult::Child => {
                execv(
                    &bin,
                    &[
                        &bin,
                        &CString::new("--session-worker").unwrap(),
                        &CString::new(format!("{}", raw_child as usize)).unwrap(),
                    ],
                )
                .expect("unable to exec");

unreachable!("after exec");
            }
        };

Ok(Session {
            task: child,
            sock: TokioUnixDatagram::from_std(parentfd)?,
            last_msg: None,
        })
    }

/// Initiates the session, which will cause authentication to begin.
    pub async fn initiate(
        &mut self,
        service: &str,
        class: &str,
        user: &str,
        authenticate: bool,
        term_mode: &TerminalMode,
        source_profile: bool,
    ) -> Result<(), Error> {
        let msg = ParentToSessionChild::InitiateLogin {
            service: service.to_string(),
            class: class.to_string(),
            user: user.to_string(),
            authenticate,
            tty: term_mode.clone(),
            source_profile,
        };
        msg.send(&mut self.sock).await?;
        Ok(())
    }

/// Return the current state of this session.
    pub async fn get_state(&mut self) -> Result<SessionState, Error> {
        let msg = match self.last_msg.take() {
            Some(msg) => msg,
            None => SessionChildToParent::recv(&mut self.sock).await?,
        };

self.last_msg = Some(msg.clone());

match msg {
            SessionChildToParent::PamMessage { style, msg } => {
                Ok(SessionState::Question(style, msg))
            }
            SessionChildToParent::Success => Ok(SessionState::Ready),
            SessionChildToParent::Error(e) => Err(e),
            msg => panic!(
                "expected PamMessage, Success or Error from session worker, got: {:?}",
                msg
            ),
        }
    }

/// Cancel the session.
    pub async fn cancel(&mut self) -> Result<(), Error> {
        self.last_msg = None;
        ParentToSessionChild::Cancel.send(&mut self.sock).await?;
        Ok(())
    }

/// Send a response to an authentication question, or None to cancel the
    /// authentication attempt.
    pub async fn post_response(&mut self, answer: Option<String>) -> Result<(), Error> {
        self.last_msg = None;
        ParentToSessionChild::PamResponse { resp: answer }
            .send(&mut self.sock)
            .await?;
        Ok(())
    }

///
    /// Send the arguments that will be used to start the session.
    ///
    pub async fn send_args(&mut self, cmd: Vec<String>) -> Result<(), Error> {
        let msg = ParentToSessionChild::Args { cmd };
        msg.send(&mut self.sock).await?;

let msg = SessionChildToParent::recv(&mut self.sock).await?;

self.last_msg = Some(msg.clone());

match msg {
            SessionChildToParent::Success => Ok(()),
            SessionChildToParent::Error(e) => Err(e),
            msg => panic!(
                "expected Success or Error from session worker, got: {:?}",
                msg
            ),
        }
    }

///
    /// Start the session.
    ///
    pub async fn start(&mut self) -> Result<SessionChild, Error> {
        let msg = ParentToSessionChild::Start;
        msg.send(&mut self.sock).await?;

self.sock.shutdown(std::net::Shutdown::Both)?;

Ok(SessionChild {
            task: self.task,
            sub_task,
        })
    }
}
07070100000025000081A4000003E800000064000000015FE1D8AC0000003C000000000000000000000000000000000000002700000000greetd-0.7.0/greetd/src/session/mod.rspub mod conv;
pub mod interface;
mod prctl;
pub mod worker;
07070100000026000081A4000003E800000064000000015FE1D8AC00000181000000000000000000000000000000000000002900000000greetd-0.7.0/greetd/src/session/prctl.rsuse nix::{errno::Errno, Result};

pub const PRCTL_SET_PDEATHSIG: i32 = 1;

#[allow(non_camel_case_types)]
pub enum PrctlOption {
    SET_PDEATHSIG(i32),
}

pub fn prctl(option: PrctlOption) -> Result<()> {
    Errno::result(match option {
        PrctlOption::SET_PDEATHSIG(sig) => unsafe {
            libc::prctl(PRCTL_SET_PDEATHSIG, sig, 0, 0, 0)
        },
    })
    .map(drop)
}
07070100000027000081A4000003E800000064000000015FE1D8AC0000270A000000000000000000000000000000000000002A00000000greetd-0.7.0/greetd/src/session/worker.rsuse std::{env, ffi::CString, os::unix::net::UnixDatagram};

use nix::{
    sys::wait::waitpid,
    unistd::{execve, fork, initgroups, setgid, setsid, setuid, ForkResult, Gid, Uid},
};
use pam_sys::{PamFlag, PamItemType};
use serde::{Deserialize, Serialize};
use users::os::unix::UserExt;

use super::{
    conv::SessionConv,
    prctl::{prctl, PrctlOption},
};
use crate::{error::Error, pam::session::PamSession, terminal};

#[derive(Clone, Debug, Serialize, Deserialize)]
pub enum AuthMessageType {
    Visible,
    Secret,
    Info,
    Error,
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub enum TerminalMode {
    Terminal {
        path: String,
        vt: usize,
        switch: bool,
    },
    Stdin,
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub enum ParentToSessionChild {
    InitiateLogin {
        service: String,
        class: String,
        user: String,
        authenticate: bool,
        tty: TerminalMode,
        source_profile: bool,
    },
    PamResponse {
        resp: Option<String>,
    },
    Args {
        cmd: Vec<String>,
    },
    Start,
    Cancel,
}

impl ParentToSessionChild {
    pub fn recv(sock: &UnixDatagram) -> Result<ParentToSessionChild, Error> {
        let mut data = [0; 10240];
        let len = sock.recv(&mut data[..])?;
        let msg = serde_json::from_slice(&data[..len])?;
        Ok(msg)
    }
}

#[derive(Clone, Debug, Serialize, Deserialize)]
pub enum SessionChildToParent {
    Success,
    Error(Error),
    PamMessage { style: AuthMessageType, msg: String },
    FinalChildPid(u64),
}

impl SessionChildToParent {
    pub fn send(&self, sock: &UnixDatagram) -> Result<(), Error> {
        let out = serde_json::to_vec(self)?;
        sock.send(&out)?;
        Ok(())
    }
}

/// The entry point for the session worker process. The session worker is
/// responsible for the entirety of the session setup and execution. It is
/// started by Session::start.
fn worker(sock: &UnixDatagram) -> Result<(), Error> {
    let (service, class, user, authenticate, tty, source_profile) =
        match ParentToSessionChild::recv(sock)? {
            ParentToSessionChild::InitiateLogin {
                service,
                class,
                user,
                authenticate,
                tty,
                source_profile,
            } => (service, class, user, authenticate, tty, source_profile),
            ParentToSessionChild::Cancel => return Err("cancelled".into()),
            msg => return Err(format!("expected InitiateLogin or Cancel, got: {:?}", msg).into()),
        };

let conv = Box::pin(SessionConv::new(sock));
    let mut pam = PamSession::start(&service, &user, conv)?;

if authenticate {
        pam.authenticate(PamFlag::NONE)?;
    }
    pam.acct_mgmt(PamFlag::NONE)?;

// Not the credentials you think.
    pam.setcred(PamFlag::ESTABLISH_CRED)?;

// Mark authentication as a success.
    SessionChildToParent::Success.send(sock)?;

// Fetch our arguments from the parent.
    let cmd = match ParentToSessionChild::recv(sock)? {
        ParentToSessionChild::Args { cmd } => cmd,
        ParentToSessionChild::Cancel => return Err("cancelled".into()),
        msg => return Err(format!("expected Args or Cancel, got: {:?}", msg).into()),
    };

SessionChildToParent::Success.send(sock)?;

// Await start request from our parent.
    match ParentToSessionChild::recv(sock)? {
        ParentToSessionChild::Start => (),
        ParentToSessionChild::Cancel => return Err("cancelled".into()),
        msg => return Err(format!("expected Start or Cancel, got: {:?}", msg).into()),
    };

let pam_username = pam.get_user()?;

let user = users::get_user_by_name(&pam_username).ok_or("unable to get user info")?;

// Make this process a session leader.
    setsid().map_err(|e| format!("unable to become session leader: {}", e))?;

match tty {
        TerminalMode::Stdin => (),
        TerminalMode::Terminal { path, vt, switch } => {
            // Tell PAM what TTY we're targetting, which is used by logind.
            pam.set_item(PamItemType::TTY, &format!("tty{}", vt))?;
            pam.putenv(&format!("XDG_VTNR={}", vt))?;

// Opening our target terminal.
            let target_term = terminal::Terminal::open(&path)?;

// Set the target VT mode to text for compatibility. Other login managers
            // set this to graphics, but that disallows start of textual applications,
            // which greetd aims to support.
            target_term.kd_setmode(terminal::KdMode::Text)?;

// Clear TTY so that it will be empty when we switch to it.
            target_term.term_clear()?;

// A bit more work if a VT switch is required.
            if switch && vt != target_term.vt_get_current()? {
                // Perform a switch to the target VT, simultaneously resetting it to
                // VT_AUTO.
                target_term.vt_setactivate(vt)?;
            }

// Connect std(in|out|err), and make this our controlling TTY.
            target_term.term_connect_pipes()?;
            target_term.term_take_ctty()?;
        }
    }

// Prepare some values from the user struct we gathered earlier.
    let username = user.name().to_str().unwrap_or("");
    let home = user.home_dir().to_str().unwrap_or("");
    let shell = user.shell().to_str().unwrap_or("");
    let uid = Uid::from_raw(user.uid());
    let gid = Gid::from_raw(user.primary_group_id());

// Change working directory
    let pwd = match env::set_current_dir(home) {
        Ok(_) => home,
        Err(_) => {
            env::set_current_dir("/")
                .map_err(|e| format!("unable to set working directory: {}", e))?;
            "/"
        }
    };

// PAM has to be provided a bunch of environment variables before
    // open_session. We pass any environment variables from our greeter
    // through here as well. This allows them to affect PAM (more
    // specifically, pam_systemd.so), as well as make it easier to gather
    // and set all environment variables later.
    let prepared_env = [
        "XDG_SEAT=seat0".to_string(),
        format!("XDG_SESSION_CLASS={}", class),
        format!("USER={}", username),
        format!("LOGNAME={}", username),
        format!("HOME={}", home),
        format!("SHELL={}", shell),
        format!("PWD={}", pwd),
        format!("GREETD_SOCK={}", env::var("GREETD_SOCK").unwrap()),
        format!(
            "TERM={}",
            env::var("TERM").unwrap_or_else(|_| "linux".to_string())
        ),
    ];

for e in prepared_env.iter() {
        pam.putenv(e)?;
    }

// Session time!
    pam.open_session(PamFlag::NONE)?;

// Prepare some strings in C format that we'll need.
    let cusername = CString::new(username)?;
    let command = if source_profile {
        format!(
            "[ -f /etc/profile ] && . /etc/profile; [ -f $HOME/.profile ] && . $HOME/.profile; exec {}",
            cmd.join(" ")
        )
    } else {
        format!("exec {}", cmd.join(" "))
    };

// Extract PAM environment for use with execve below.
    let pamenvlist = pam.getenvlist()?;
    let envvec = pamenvlist.to_vec();

// PAM is weird and gets upset if you exec from the process that opened
    // the session, registering it automatically as a log-out. Thus, we must
    // exec in a new child.
    let child = match fork().map_err(|e| format!("unable to fork: {}", e))? {
        ForkResult::Parent { child, .. } => child,
        ForkResult::Child => {
            // It is important that we do *not* return from here by
            // accidentally using '?'. The process *must* exit from within
            // this match arm.

// Drop privileges to target user
            initgroups(&cusername, gid).expect("unable to init groups");
            setgid(gid).expect("unable to set GID");
            setuid(uid).expect("unable to set UID");

// Set our parent death signal. setuid/setgid above resets the
            // death signal, which is why we do this here.
            prctl(PrctlOption::SET_PDEATHSIG(libc::SIGTERM)).expect("unable to set death signal");

// Run
            let cpath = CString::new("/bin/sh").unwrap();
            execve(
                &cpath,
                &[
                    &cpath,
                    &CString::new("-c").unwrap(),
                    &CString::new(command).unwrap(),
                ],
                &envvec,
            )
            .expect("unable to exec");

unreachable!("after exec");
        }
    };

// Signal the inner PID to the parent process.
    SessionChildToParent::FinalChildPid(child.as_raw() as u64).send(sock)?;
    sock.shutdown(std::net::Shutdown::Both)?;

// Set our parent death signal. setsid above resets the signal, hence our
    // late assignment, which is why we do this here.
    prctl(PrctlOption::SET_PDEATHSIG(libc::SIGTERM))?;

// Wait for process to terminate, handling EINTR as necessary.
    loop {
        match waitpid(child, None) {
            Err(nix::Error::Sys(nix::errno::Errno::EINTR)) => continue,
            Err(e) => {
                eprintln!("session: waitpid on inner child failed: {}", e);
                break;
            }
            Ok(_) => break,
        }
    }

// Close the session. This step requires root privileges to run, as it
    // will result in various forms of login teardown (including unmounting
    // home folders, telling logind that the session ended, etc.). This is
    // why we cannot drop privileges in this process, but must do it in the
    // inner-most child.
    pam.close_session(PamFlag::NONE)?;
    pam.setcred(PamFlag::DELETE_CRED)?;
    pam.end()?;

Ok(())
}

pub fn main(sock: &UnixDatagram) -> Result<(), Error> {
    if let Err(e) = worker(sock) {
        SessionChildToParent::Error(e.clone()).send(sock)?;
        Err(e)
    } else {
        Ok(())
    }
}
07070100000028000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000002100000000greetd-0.7.0/greetd/src/terminal07070100000029000081A4000003E800000064000000015FE1D8AC000004EC000000000000000000000000000000000000002A00000000greetd-0.7.0/greetd/src/terminal/ioctl.rsuse nix::{ioctl_read_bad, ioctl_write_int_bad, ioctl_write_ptr_bad};

pub const KDSETMODE: u16 = 0x4B3A;
pub const KDTEXT: i32 = 0x00;
pub const KDGRAPHICS: i32 = 0x01;
pub const VT_OPENQRY: u16 = 0x5600;
pub const VT_SETMODE: u16 = 0x5602;
pub const VT_GETSTATE: u16 = 0x5603;
pub const VT_ACTIVATE: u16 = 0x5606;
pub const VT_WAITACTIVE: u16 = 0x5607;
pub const VT_SETACTIVATE: u16 = 0x560F;
pub const VT_AUTO: u8 = 0;
pub const TIOCSCTTY: u16 = 0x540E;

ioctl_write_int_bad!(kd_setmode, KDSETMODE);
ioctl_write_int_bad!(vt_activate, VT_ACTIVATE);
ioctl_write_int_bad!(vt_waitactive, VT_WAITACTIVE);
ioctl_write_ptr_bad!(vt_setmode, VT_SETMODE, vt_mode);
ioctl_write_ptr_bad!(vt_setactivate, VT_SETACTIVATE, vt_setactivate);
ioctl_read_bad!(vt_openqry, VT_OPENQRY, i64);
ioctl_read_bad!(vt_getstate, VT_GETSTATE, vt_state);
ioctl_write_int_bad!(term_tiocsctty, TIOCSCTTY);

#[allow(dead_code)]
#[repr(C)]
pub struct vt_mode {
    pub mode: u8,
    pub waitv: u8,
    pub relsig: u16,
    pub acqsig: u16,
    pub frsig: u16,
}

#[allow(dead_code)]
#[repr(C)]
pub struct vt_setactivate {
    pub console: u64,
    pub mode: vt_mode,
}

#[allow(dead_code)]
#[repr(C)]
pub struct vt_state {
    pub v_active: u16,
    pub v_signal: u16,
    pub v_state: u16,
}
0707010000002A000081A4000003E800000064000000015FE1D8AC00001D0A000000000000000000000000000000000000002800000000greetd-0.7.0/greetd/src/terminal/mod.rsmod ioctl;

use crate::error::Error;
use nix::{
    fcntl::{open, OFlag},
    sys::stat::Mode,
    unistd::{close, dup2, write},
};
use std::{ffi::CStr, os::unix::io::RawFd};

#[allow(dead_code)]
pub enum KdMode {
    Text,
    Graphics,
}

impl KdMode {
    fn to_const(&self) -> i32 {
        match self {
            KdMode::Text => ioctl::KDTEXT,
            KdMode::Graphics => ioctl::KDGRAPHICS,
        }
    }
}

pub struct Terminal {
    fd: RawFd,
    autoclose: bool,
}

impl Drop for Terminal {
    fn drop(&mut self) {
        if self.autoclose {
            close(self.fd).unwrap();
        }
    }
}

fn ttyname_r(fd: RawFd) -> Result<String, Error> {
    let mut arr: [u8; 32] = [0; 32];
    let res = unsafe {
        libc::ttyname_r(
            fd as libc::c_int,
            &mut arr[0] as *mut u8 as *mut libc::c_char,
            31,
        )
    };
    if res != 0 {
        return Err("ttyname_r failed".into());
    }
    let len = unsafe { libc::strnlen(&arr[0] as *const u8 as *const libc::c_char, 31) };
    let s = CStr::from_bytes_with_nul(&arr[..len + 1])
        .map_err(|e| Error::Error(format!("ttyname_r result conversion failed: {}", e)))?;
    Ok(s.to_str()
        .map_err(|e| Error::Error(format!("ttyname_r result conversion failed: {}", e)))?
        .to_string())
}

impl Terminal {
    /// Open the terminal file for the specified terminal number.
    pub fn open(terminal: &str) -> Result<Terminal, Error> {
        let res = open(
            terminal,
            OFlag::O_RDWR | OFlag::O_NOCTTY,
            Mode::from_bits_truncate(0o666),
        );
        match res {
            Ok(fd) => Ok(Terminal {
                fd,
                autoclose: true,
            }),
            Err(e) => return Err(format!("terminal: unable to open: {}", e).into()),
        }
    }

/// Open the terminal from stdin
    pub fn stdin() -> Terminal {
        Terminal {
            fd: 0 as RawFd,
            autoclose: false,
        }
    }

/// Returns the name of the TTY
    pub fn ttyname(&self) -> Result<String, Error> {
        ttyname_r(self.fd)
    }

/// Set the kernel display to either graphics or text mode. Graphivs mode
    /// disables the kernel console on this VT, and also disables blanking
    /// between VT switches if both source and target VT is in graphics mode.
    pub fn kd_setmode(&self, mode: KdMode) -> Result<(), Error> {
        let mode = mode.to_const();
        let ret = unsafe { ioctl::kd_setmode(self.fd, mode) };

if let Err(v) = ret {
            Err(format!("terminal: unable to set kernel display mode: {}", v).into())
        } else {
            Ok(())
        }
    }

/// Switches to the specified VT and waits for completion of switch.
    fn vt_activate(&self, target_vt: usize) -> Result<(), Error> {
        if let Err(v) = unsafe { ioctl::vt_activate(self.fd, target_vt as i32) } {
            return Err(format!("terminal: unable to activate: {}", v).into());
        }
        if let Err(v) = unsafe { ioctl::vt_waitactive(self.fd, target_vt as i32) } {
            return Err(format!("terminal: unable to wait for activation: {}", v).into());
        }
        Ok(())
    }

/// Set the VT mode to VT_AUTO with everything cleared.
    fn vt_mode_clean(&self) -> Result<(), Error> {
        let mode = ioctl::vt_mode {
            mode: ioctl::VT_AUTO,
            waitv: 0,
            relsig: 0,
            acqsig: 0,
            frsig: 0,
        };
        let res = unsafe { ioctl::vt_setmode(self.fd, &mode) };

if let Err(v) = res {
            Err(format!("terminal: unable to set vt mode: {}", v).into())
        } else {
            Ok(())
        }
    }

/// Set a VT mode, switch to the VT and wait for its activation. On Linux,
    /// this will use VT_SETACTIVATE, which will both set the mode and switch
    /// to the VT under the kernel console lock. On other platforms,
    /// VT_SETMODE followed by VT_ACTIVATE is used. For all platforms,
    /// VT_WAITACTIVE is used to wait for shell activation.
    pub fn vt_setactivate(&self, target_vt: usize) -> Result<(), Error> {
        if cfg!(target_os = "linux") {
            let arg = ioctl::vt_setactivate {
                console: target_vt as u64,
                mode: ioctl::vt_mode {
                    mode: ioctl::VT_AUTO,
                    waitv: 0,
                    relsig: 0,
                    acqsig: 0,
                    frsig: 0,
                },
            };
            if let Err(v) = unsafe { ioctl::vt_setactivate(self.fd, &arg) } {
                return Err(format!("terminal: unable to setactivate: {}", v).into());
            }
            if let Err(v) = unsafe { ioctl::vt_waitactive(self.fd, target_vt as i32) } {
                return Err(format!("terminal: unable to wait for activation: {}", v).into());
            }
        } else {
            self.vt_mode_clean()?;
            self.vt_activate(target_vt)?;
        }
        Ok(())
    }

/// Retrieves the current VT number.
    pub fn vt_get_current(&self) -> Result<usize, Error> {
        let mut state = ioctl::vt_state {
            v_active: 0,
            v_signal: 0,
            v_state: 0,
        };
        let res = unsafe { ioctl::vt_getstate(self.fd, &mut state as *mut ioctl::vt_state) };

if let Err(v) = res {
            Err(format!("terminal: unable to get current vt: {}", v).into())
        } else if state.v_active < 1 {
            Err(format!("terminal: current vt invalid: {}", state.v_active).into())
        } else {
            Ok(state.v_active as usize)
        }
    }

/// Find the next unallocated VT, allocate it and return the number. Note
    /// that allocation does not mean exclusivity, and another process may take
    /// and use the VT before you get to it.
    pub fn vt_get_next(&self) -> Result<usize, Error> {
        let mut next_vt: i64 = 0;
        let res = unsafe { ioctl::vt_openqry(self.fd, &mut next_vt as *mut i64) };

if let Err(v) = res {
            Err(format!("terminal: unable to get next vt: {}", v).into())
        } else if next_vt < 1 {
            Err(format!("terminal: next vt invalid: {}", next_vt).into())
        } else {
            Ok(next_vt as usize)
        }
    }

/// Hook up stdin, stdout and stderr of the current process ot this
    /// terminal.
    pub fn term_connect_pipes(&self) -> Result<(), Error> {
        let res = dup2(self.fd, 0)
            .and_then(|_| dup2(self.fd, 1))
            .and_then(|_| dup2(self.fd, 2));

if let Err(v) = res {
            Err(format!("terminal: unable to connect pipes: {}", v).into())
        } else {
            Ok(())
        }
    }

/// Clear this terminal by sending the appropciate escape codes to it. Only
    /// affects text mode.
    pub fn term_clear(&self) -> Result<(), Error> {
        let res = write(self.fd, b"\x1B[H\x1B[2J");
        if let Err(v) = res {
            Err(format!("terminal: unable to clear: {}", v).into())
        } else {
            Ok(())
        }
    }

// Forcibly take control of the terminal referred to by this fd.
    pub fn term_take_ctty(&self) -> Result<(), Error> {
        let res = unsafe { ioctl::term_tiocsctty(self.fd, 1) };

match res {
            Err(e) => Err(format!("terminal: unable to take controlling terminal: {}", e).into()),
            Ok(_) => Ok(()),
        }
    }
}
0707010000002B000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001800000000greetd-0.7.0/greetd_ipc0707010000002C000081A4000003E800000064000000015FE1D8AC000002C1000000000000000000000000000000000000002300000000greetd-0.7.0/greetd_ipc/Cargo.toml[package]
name = "greetd_ipc"
version = "0.6.0"
authors = ["Kenny Levinsen"]
edition = "2018"
license = "GPL-3.0"
homepage = "https://kl.wtf/projects/greetd"
repository = "https://git.sr.ht/~kennylevinsen/greetd/"
description = "An implementation of the greetd IPC protocol"
keywords = ["greetd"]

[package.metadata.docs.rs]
all-features = true

[features]
codec = ["thiserror"]
sync-codec = ["codec"]
tokio-codec = ["codec", "tokio", "async-trait"]

[dependencies]
serde = { version = "1.0", features = ["derive"] }
serde_json = "1.0"
tokio = { version = "0.2", features = ["io-util"], optional = true }
async-trait = { version = "0.1", optional = true }
thiserror = { version = "1.0", optional = true }
0707010000002D000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001C00000000greetd-0.7.0/greetd_ipc/src0707010000002E000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000002200000000greetd-0.7.0/greetd_ipc/src/codec0707010000002F000081A4000003E800000064000000015FE1D8AC00000514000000000000000000000000000000000000002900000000greetd-0.7.0/greetd_ipc/src/codec/mod.rs//! Reader/writer codecs for Request/Response.
//!
//! This is implemented in the form of two traits, SyncCodec and TokioCodec,
//! which operate on the `std` and `tokio` implementations of reader/writer
//! traits. The former is intended as the name suggests for synchronous
//! operation, while the latter is for asynchronous operation when using tokio.
//!
//! These codecs are hidden behind the `sync-codec` and `tokio-codec` features,
//! respectively. These features also implicitly enable the `codec` feature,
//! which controls the entire `codec` module.
//!

use thiserror::Error as ThisError;

#[derive(Debug, ThisError)]
pub enum Error {
    #[error("serialization error: {0}")]
    Serialization(String),
    #[error("i/o error: {0}")]
    Io(String),
    #[error("EOF")]
    Eof,
}

impl From<serde_json::error::Error> for Error {
    fn from(error: serde_json::error::Error) -> Self {
        Error::Serialization(error.to_string())
    }
}

impl From<std::io::Error> for Error {
    fn from(error: std::io::Error) -> Self {
        Error::Io(format!("{}", error))
    }
}

#[cfg(feature = "sync-codec")]
mod sync;
#[cfg(feature = "sync-codec")]
pub use self::sync::SyncCodec;

#[cfg(feature = "tokio-codec")]
mod tokio;
#[cfg(feature = "tokio-codec")]
pub use self::tokio::TokioCodec;
07070100000030000081A4000003E800000064000000015FE1D8AC00000A3A000000000000000000000000000000000000002A00000000greetd-0.7.0/greetd_ipc/src/codec/sync.rs//! Synchronous reader/writer implementation, operating on an implementor of std::io::{Read, Write}.
//!
//! # Example
//!
//! ```no_run
//! use std::env;
//! use std::os::unix::net::UnixStream;
//! use greetd_ipc::{Request, Response};
//! use greetd_ipc::codec::SyncCodec;
//!
//! fn main() -> Result<(), Box<dyn std::error::Error>> {
//!     let mut stream = UnixStream::connect(env::var("GREETD_SOCK")?)?;
//!     Request::CreateSession { username: "john".to_string() }.write_to(&mut stream)?;
//!     let resp = Response::read_from(&mut stream)?;
//!     Ok(())
//! }
//! ```

use crate::{codec::Error, Request, Response};
use std::io::{Read, Write};

/// Reader/writer implementation over std::io::{Read,Write}.
pub trait SyncCodec {
    fn read_from<T: Read>(stream: &mut T) -> Result<Self, Error>
    where
        Self: std::marker::Sized;
    fn write_to<T: Write>(&self, stream: &mut T) -> Result<(), Error>;
}

impl SyncCodec for Request {
    fn read_from<T: Read>(stream: &mut T) -> Result<Self, Error> {
        let mut len_bytes = [0; 4];
        stream
            .read_exact(&mut len_bytes)
            .map_err(|e| match e.kind() {
                std::io::ErrorKind::UnexpectedEof => Error::Eof,
                _ => e.into(),
            })?;
        let len = u32::from_ne_bytes(len_bytes);

let mut resp_buf = vec![0; len as usize];
        stream.read_exact(&mut resp_buf)?;
        serde_json::from_slice(&resp_buf).map_err(|e| e.into())
    }

impl SyncCodec for Response {
    fn read_from<T: Read>(stream: &mut T) -> Result<Self, Error> {
        let mut len_bytes = [0; 4];
        stream
            .read_exact(&mut len_bytes)
            .map_err(|e| match e.kind() {
                std::io::ErrorKind::UnexpectedEof => Error::Eof,
                _ => e.into(),
            })?;
        let len = u32::from_ne_bytes(len_bytes);

let mut resp_buf = vec![0; len as usize];
        stream.read_exact(&mut resp_buf)?;
        serde_json::from_slice(&resp_buf).map_err(|e| e.into())
    }

fn write_to<T: Write>(&self, stream: &mut T) -> Result<(), Error> {
        let body_bytes = serde_json::to_vec(self)?;
        let len_bytes = (body_bytes.len() as u32).to_ne_bytes();
        stream.write_all(&len_bytes)?;
        stream.write_all(&body_bytes)?;
        Ok(())
    }
}
07070100000031000081A4000003E800000064000000015FE1D8AC00000CB7000000000000000000000000000000000000002B00000000greetd-0.7.0/greetd_ipc/src/codec/tokio.rs//! Asynchronous reader/writer implementation, operating on an implementor of tokio::io::{AsyncReadExt, AsyncWriteExt}.
//!
//! # Example
//!
//! ```no_run
//! use std::env;
//! use tokio::net::UnixStream;
//! use greetd_ipc::{Request, Response};
//! use greetd_ipc::codec::TokioCodec;
//!
//! #[tokio::main]
//! async fn main() -> Result<(), Box<dyn std::error::Error>> {
//!     let mut stream = UnixStream::connect(env::var("GREETD_SOCK")?).await?;
//!     Request::CreateSession { username: "john".to_string() }.write_to(&mut stream).await?;
//!     let resp = Response::read_from(&mut stream).await?;
//!     Ok(())
//! }
//! ```
use crate::{codec::Error, Request, Response};
use async_trait::async_trait;
use tokio::io::{AsyncReadExt, AsyncWriteExt};

/// Reader/writer implementation over tokio::io::{AsyncReadExt, AsyncWriteExt}.
#[async_trait]
pub trait TokioCodec {
    async fn read_from<T: AsyncReadExt + std::marker::Unpin + Send>(
        stream: &mut T,
    ) -> Result<Self, Error>
    where
        Self: std::marker::Sized;
    async fn write_to<T: AsyncWriteExt + std::marker::Unpin + Send>(
        &self,
        stream: &mut T,
    ) -> Result<(), Error>;
}

#[async_trait]
impl TokioCodec for Request {
    async fn read_from<T: AsyncReadExt + std::marker::Unpin + Send>(
        stream: &mut T,
    ) -> Result<Self, Error> {
        let mut len_bytes = [0; 4];
        stream
            .read_exact(&mut len_bytes)
            .await
            .map_err(|e| match e.kind() {
                std::io::ErrorKind::UnexpectedEof => Error::Eof,
                _ => e.into(),
            })?;
        let len = u32::from_ne_bytes(len_bytes);

let mut body_bytes = vec![0; len as usize];
        stream.read_exact(&mut body_bytes).await?;
        let body = serde_json::from_slice(&body_bytes)?;
        Ok(body)
    }

#[async_trait]
impl TokioCodec for Response {
    async fn read_from<T: AsyncReadExt + std::marker::Unpin + Send>(
        stream: &mut T,
    ) -> Result<Self, Error> {
        let mut len_bytes = [0; 4];
        stream
            .read_exact(&mut len_bytes)
            .await
            .map_err(|e| match e.kind() {
                std::io::ErrorKind::UnexpectedEof => Error::Eof,
                _ => e.into(),
            })?;
        let len = u32::from_ne_bytes(len_bytes);

let mut body_bytes = vec![0; len as usize];
        stream.read_exact(&mut body_bytes).await?;
        let body = serde_json::from_slice(&body_bytes)?;
        Ok(body)
    }

async fn write_to<T: AsyncWriteExt + std::marker::Unpin + Send>(
        &self,
        stream: &mut T,
    ) -> Result<(), Error> {
        let body_bytes = serde_json::to_vec(self)?;
        let len_bytes = (body_bytes.len() as u32).to_ne_bytes();
        stream.write_all(&len_bytes).await?;
        stream.write_all(&body_bytes).await?;
        Ok(())
    }
}
07070100000032000081A4000003E800000064000000015FE1D8AC00001415000000000000000000000000000000000000002300000000greetd-0.7.0/greetd_ipc/src/lib.rs//! # `greetd` IPC protocol library
//!
//! This library implements the [greetd](https://git.sr.ht/~kennylevinsen/greetd) IPC protocol.
//!
//! The library exposes a [Request](enum.Request.html) and a
//! [Response](enum.Response.html) enum, representing the valid protocol
//! messages. Furthermore, codec implementations are available to serialize
//! these to/from both sync and async readers/writers. The availability of
//! these are controlled by feature flags.
//!
//! Additional types are part of the different request and response values.
//!
//! See `agreety` for a simple example use of this library.
//!
//! # Format
//!
//! The message format is as follows:
//!
//! ```text
//! +----------+-------------------+
//! | len: u32 | JSON payload: str |
//! +----------+-------------------+
//! ```
//!
//! Length is in native byte-order. The JSON payload is a variant of the
//! Request or Response enums.
//!
//! # Request and response types
//!
//! See [Request](enum.Request.html) and [Response](enum.Response.html) for
//! information about the request and response types, as well as their
//! serialization.
//!
use serde::{Deserialize, Serialize};

#[cfg(feature = "codec")]
#[cfg_attr(docsrs, doc(cfg(feature = "codec")))]
pub mod codec;

/// A request from a greeter to greetd. The request type is internally tagged
/// with the"type" field, with the type written in snake_case.
///
/// Example serialization:
///
/// ```json
/// {
///    "type": "create_session",
///    "username": "bob"
/// }
/// ```
#[derive(Debug, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
#[serde(tag = "type")]
pub enum Request {
    /// CreateSession initiates a login attempt for the given user.
    /// CreateSession returns either a Response::AuthMessage,
    /// Response::Success or Response::Failure.
    ///
    /// If an auth message is returned, it should be answered with a
    /// Request::PostAuthMessageResponse. If a success is returned, the session
    /// can then be started with Request::StartSession.
    ///
    /// If a login flow needs to be aborted at any point, send
    /// Request::CancelSession. Note that the session is cancelled
    /// automatically on error.
    CreateSession { username: String },

/// PostAuthMessageResponse responds to the last auth message, and returns
    /// either a Response::AuthMessage, Response::Success or Response::Failure.
    ///
    /// If an auth message is returned, it should be answered with a
    /// Request::PostAuthMessageResponse. If a success is returned, the session
    /// can then be started with Request::StartSession.
    PostAuthMessageResponse { response: Option<String> },

/// Start a successfully logged in session. This will fail if the session
    /// has pending messages or has encountered an error.
    StartSession { cmd: Vec<String> },

/// Cancel a session. This can only be done if the session has not been
    /// started. Cancel does not have to be called if an error has been
    /// encountered in its setup or login flow.
    CancelSession,
}

/// An error type for Response::Error. Serialized as snake_case.
#[derive(Debug, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
pub enum ErrorType {
    /// A generic error. See the error description for more details.
    Error,

/// An error caused by failed authentication.
    AuthError,
}

/// A message type for a Response::AuthMessage. Serialized as snake_case.
#[derive(Debug, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
pub enum AuthMessageType {
    /// A question whose answer should be visible during input.
    Visible,

/// A question whose answer should be kept secret during input.
    Secret,

/// An information message.
    Info,

/// An error message.
    Error,
}

/// A response from greetd to a greeter. The request type is internally tagged
/// with the"type" field, with the type written in snake_case.
///
/// Example serialization:
///
/// ```json
/// {
///    "type": "auth_message",
///    "message": "Password:",
///    "message_type": "secret"
/// }
/// ```
#[derive(Debug, Deserialize, Serialize)]
#[serde(tag = "type")]
#[serde(rename_all = "snake_case")]
pub enum Response {
    /// The request was successful.
    Success,

/// The request failed. See the type and/or description for more
    /// information about this failure.
    Error {
        error_type: ErrorType,
        description: String,
    },

/// An authentication message needs to be answered to continue through the
    /// authentication flow.
    ///
    /// An authentication message can consist of anything. While it will
    /// commonly just be a request for the users' password, it could also ask
    /// for TOTP codes, or whether or not you felt sad when Littlefoot's mother
    /// died in the original "Land Before Time". It is therefore important that
    /// no assumptions are made about the questions that will be asked, and
    /// attempts to automatically answer these questions should not be made.
    AuthMessage {
        auth_message_type: AuthMessageType,
        auth_message: String,
    },
}
07070100000033000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001300000000greetd-0.7.0/inish07070100000034000081A4000003E800000064000000015FE1D8AC0000006D000000000000000000000000000000000000001E00000000greetd-0.7.0/inish/Cargo.toml[package]
name = "inish"
version = "0.1.0"
authors = ["Kenny Levinsen"]
edition = "2018"
license = "GPL-3.0"
07070100000035000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001700000000greetd-0.7.0/inish/src07070100000036000081A4000003E800000064000000015FE1D8AC00000DEE000000000000000000000000000000000000001E00000000greetd-0.7.0/inish/src/lib.rsuse std::{collections::HashMap, error::Error};

fn parse_field<'a>(line: &'a str) -> Result<(&'a str, &'a str), Box<dyn Error>> {
    let split = match line.find('=') {
        Some(v) => v,
        None => return Err("expected equals sign on line, but found none".into()),
    };

let (key, value) = line.split_at(split);
    let (key, value) = (key.trim(), value.trim_matches('=').trim());

Ok((key, value))
}

type InishSection<'a> = HashMap<&'a str, &'a str>;
type Inish<'a> = HashMap<&'a str, InishSection<'a>>;

pub fn parse<'a>(s: &'a str) -> Result<Inish<'a>, Box<dyn Error>> {
    let mut sections: Inish<'a> = HashMap::new();
    let mut current_section = HashMap::new();
    let mut current_section_name = "";

for line in s.lines() {
        let line = line.trim();
        let mut chars = line.chars();
        let start = chars.next();
        let end = chars.last();
        match (start, end) {
            (Some('#'), _) => continue,
            (Some('['), Some(']')) => {
                sections.insert(current_section_name, current_section);
                current_section = HashMap::new();
                let len = line.bytes().count();
                current_section_name = &line[1..len - 1].trim();
            }
            (Some('['), v) => {
                return Err(format!(
                    "expected Some(']') to terminate section name, but got {:?}",
                    v
                )
                .into());
            }
            _ if line.is_empty() => continue,
            _ => {
                let (key, value) = parse_field(line)?;
                current_section.insert(key, value);
            }
        }
    }

sections.insert(current_section_name, current_section);
    Ok(sections)
}

#[cfg(test)]
mod tests {
    use super::*;

#[test]
    fn sections() {
        let config = parse(
            "
[section_a]
[section_b]
",
        )
        .expect("config didn't parse");

if !config.contains_key("section_a") {
            panic!("named section did not exist");
        }

if !config.contains_key("section_b") {
            panic!("named section did not exist");
        }

if !config.contains_key("") {
            panic!("unnamed section did not exist");
        }
    }

#[test]
    fn fields() {
        let config = parse(
            "
field_outside = 'hello'
[section_a]
field_a = 1234
",
        )
        .expect("config didn't parse");

let section_a = match config.get("section_a") {
            Some(v) => v,
            None => panic!("named section did not exist"),
        };

assert_eq!(section_a.get("field_a"), Some(&"1234"));

let section_unnamed = match config.get("") {
            Some(v) => v,
            None => panic!("unnamed section did not exist"),
        };

assert_eq!(section_unnamed.get("field_outside"), Some(&"'hello'"));
    }

#[test]
    fn whitespaces() {
        let config = parse(
            "

field outside  =   'hello'

[ section a   ]
   field a   =   1234   ",
        )
        .expect("config didn't parse");

let section_a = match config.get("section a") {
            Some(v) => v,
            None => panic!("named section did not exist"),
        };

assert_eq!(section_a.get("field a"), Some(&"1234"));

let section_unnamed = match config.get("") {
            Some(v) => v,
            None => panic!("unnamed section did not exist"),
        };

assert_eq!(section_unnamed.get("field outside"), Some(&"'hello'"));
    }
}
07070100000037000041ED000003E800000064000000015FE1D8AC00000000000000000000000000000000000000000000001100000000greetd-0.7.0/man07070100000038000081A4000003E800000064000000015FE1D8AC0000031C000000000000000000000000000000000000001F00000000greetd-0.7.0/man/agreety-1.scdagreety(1)

# NAME

agreety - A text-based greeter for greetd

# SYNOPSIS

*agreety* [options]

# OPTIONS

*-h, --help*
	Show help message and quit.

*-c, --cmd <command>*
	Specifies the command to run on successful login. agreety will ask if none is
	specified.

*-f, --max-failures <num>*
	Specifies the maximum number of login failures to accept before terminating.
	Defaults to 5.

# DESCRIPTION

agreety is a very simple text-based greeter, with an appearance similar to
*agetty*(8) and *login*(1). It is bundled with *greetd*(1).

To use agreety, configure it as your greeter in your greetd config file.

# AUTHORS

Maintained by Kenny Levinsen <contact@kl.wtf>. For more information about
greetd development, see https://git.sr.ht/~kennylevinsen/greetd.

# SEE ALSO
*greetd*(1) *greetd*(5)07070100000039000081A4000003E800000064000000015FE1D8AC00000828000000000000000000000000000000000000001E00000000greetd-0.7.0/man/greetd-1.scdgreetd(1)

# NAME

greetd - A login manager daemon

# SYNOPSIS

*greetd* [options]

# OPTIONS

*-h, --help*
	Show help message and quit.

*-c, --config <config>*
	Specifies the configuration file to use.

# DESCRIPTION

greetd was created to fill the need for a simple login manager that makes no
assumptions about the applications it starts, thus being equally suitable for
starting console sessions, Wayland sessions, or something else entirely.

greetd does not itself interact with the user, but relies on an external
greeter process like agreety(1) to handle that aspect.

# OPERATION

greetd operates on *sessions*. A greeter creates a session, attempts to
authenticate a user in it, and finally, uses it start an arbitrary
application.

There are two types of preconfigured sessions: The default session, also known
as the *greeter*, and the optional initial session, serving the purpose of
"auto-login". The initial session, if configured, is started once when greetd
launches. The default session is started on launch if an initial session is
not configured, and started again whenever no session is running, such as when
the user logs out.

An IPC socket is exposed to this greeter, as reported by *GREETD_SOCK*. The
greeter can use this to create, authenticate and finally start a session. For
more information about the IPC layer, see greetd-ipc(7).

Once the greeter has requested the start of a session and terminated itself,
greetd will start the new session. Once this session terminates, the process
starts over.

greetd makes no assumptions about any sessions, including the greeter. They
can be text-based, running in the active console, or full-on graphical
environments.

# CONFIGURATION

greetd looks for a configuration file in /etc/greetd/config.toml by default.
This can be overriden with a command-line argument.

For information on the config file format, see greetd(5).

# AUTHORS

Maintained by Kenny Levinsen <contact@kl.wtf>. For more information about
greetd development, see https://git.sr.ht/~kennylevinsen/greetd.

# SEE ALSO
*greetd*(5) *greetd-ipc*(7)0707010000003A000081A4000003E800000064000000015FE1D8AC00000A7C000000000000000000000000000000000000001E00000000greetd-0.7.0/man/greetd-5.scdgreetd(5)

# NAME

greetd - configuration file

# DESCRIPTION

greetd uses a simple TOML configuration file to define its behavior.

# CONFIGURATION

The configuration is divided into *sections*. Sections are delimited like so:

```
[section_name]
config_key = value
```

Configuration keys can be integer literals, or quote-delimited strings. The
configuration sections are described below.

## terminal

This section contains terminal configuration.

*vt* = num|"next"|"current"
	The VT to run on. Can be the number of a specific VT, "next" to select the
	next available VT, or "current" to stay wherever greetd was started. The
	specific VT is evaluated at startup, and does not change during the execution
	of greetd.

If using the current or a specific VT, you must ensure that there are no
	other users of that VT. If using systemd with autovt and getty, conflict
	avoidance can be handled in the service unit with
	"Conflicts=getty@ttyN.service", where N is the VT number.

Use of a specific VT with appropriate conflict avoidance is recommended.

## general

This section contains general configuration that does not fit in other sections
nor deserved its own section.

*source_profile* = true|false
	Whether or not to source ~/.profile and /etc/profile if present when running
	commands. Defaults to true.

## default_session

This section describes the default session, also referred to as the *greeter*.

*command* = command-line
	The command-line to run to start the default session, e.g. "agreety -c sway".
	The default session is automatically started when no other session is
	running, such as when user session terminate, and when greetd is initially
	started with no initial session configured.

See *greetd-ipc*(7) for information on how a greeter can create sessions.

*user* = user
	The user to use for running the greeter. Defaults to "greeter".

## initial_session

This optional section describes the initial session, commonly referred to as
"auto-login".

*command* = command-line
	The command-line to run to start the initial session, e.g. "sway". The
	initial session will be run when exactly once when greetd is initially
	launched.

*user* = user
	The user to use for running the initial session.

# EXAMPLES

## Regular setup with agreety and sway

```
[terminal]
vt = 1

[default_session]
command = "agreety -c sway"
```

## Auto-login

```
[terminal]
vt = 1

[default_session]
command = "agreety -c sway"

[initial_session]
command = "sway"
user = "john"
```

# AUTHORS

Maintained by Kenny Levinsen <contact@kl.wtf>. For more information about
greetd development, see https://git.sr.ht/~kennylevinsen/greetd.

# SEE ALSO
*greetd*(1) *greetd-ipc*(7)
0707010000003B000081A4000003E800000064000000015FE1D8AC00000C87000000000000000000000000000000000000002200000000greetd-0.7.0/man/greetd-ipc-7.scdgreetd-ipc(7)

# NAME

greetd-ipc - IPC protocol for greetd

# DESCRIPTION

This details the interprocess communication (IPC) protocol for *greetd*(1).
This IPC protocol can be used to create and manage sessions under greetd.

The IPC protocol uses a UNIX socket as a method of communication. The path
to the socket is stored in the environment variable _GREETD_SOCK_.

# MESSAGE AND REPLY FORMAT

The format for messages and replies is:
```
<payload-length> <payload>
```
Where
```
<payload-length> is a 32-bit integer in native byte order
<payload> is a UTF-8-encoded JSON string.
```

For example, sending the "create_session" command would look like the
following hexdump:
```
00000000  2c 00 00 00 7b 22 74 79  70 65 22 3a 20 22 63 72  |,...{"type": "cr|
00000010  65 61 74 65 5f 73 65 73  73 69 6f 6e 22 2c 20 22  |eate_session", "|
00000020  75 73 65 72 6e 61 6d 65  22 3a 20 22 6d 65 22 7d  |username": "me"}|
```

# MESSAGES

## Requests

[[ *MESSAGE TYPE*
:[ *FIELDS*
:< *PURPOSE*
|  create_session
:  username (string)
:  Creates a session and initiates a login attempted for the given user. The session is ready to be started if a success is returned.
|  post_auth_message_response
:  response (string, optional)
:  Answers an authentication message. If the message was informative (info, error), then a response does not need to be set in this message. The session is ready to be started if a success is returned.
|  start_session
:  cmd (array of strings)
:  Requests for the session to be started using the provided command line. The session will start after the greeter process terminates.
|  cancel_session
: 
:  Cancels the session that is currently under configuration.

## Responses
[[ *MESSAGE TYPE*
:[ *FIELDS*
:< *PURPOSE*
|[ success
: 
:  Indicates that the request succeeded.
|  error
:  error_type (enum as string), description (string)
:  Indicates that the request failed.
|  auth_message
:  auth_message_type (enum as string), auth_message (string)
:  Indicates that an authentication message needs to be answered to continue through the authentication flow. There are no limits on the number and type of messages that may be required for authentication to succeed, and a greeter should not make any assumptions about the messages. Must be answered with either post_auth_message_response or cancel_session.

## Authentication message type enums

[[ *AUTH MESSAGE TYPE*
:[ *PURPOSE*
|  visible
:  Indicates that input from the user should be visible when they answer this question.
|  secret
:  Indicates that input from the user should be considered secret when they answer this question.
|  info
:  Indicates that this message is informative, not a question.
|  error
:  Indicates that this message is an error, not a question.

## Error enums

[[ *ERROR TYPE*
:[ *PURPOSE*
|  auth_error
:  Indicates that authentication failed. This is not a fatal error, and is likely caused by incorrect credentials. Handle as appropriate.
|  error
:  A general error. See the error description for more information.

# AUTHORS

Maintained by Kenny Levinsen <contact@kl.wtf>. For more information about
greetd development, see https://git.sr.ht/~kennylevinsen/greetd.

# SEE ALSO
*greetd*(1)0707010000003C000081A4000003E800000064000000015FE1D8AC0000002E000000000000000000000000000000000000001A00000000greetd-0.7.0/rustfmt.tomlunstable_features = true
merge_imports = true
07070100000000000000000000000000000000000000010000000000000000000000000000000000000000000000000000000B00000000TRAILER!!!378 blocks

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