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claws-mail.14796
claws-mail-Reworked-fixing-unsecure-command-lin...
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File claws-mail-Reworked-fixing-unsecure-command-line-invocation.patch of Package claws-mail.14796
From b0c16922b57e1df5e885d6fb03b473555851ad21 Mon Sep 17 00:00:00 2001 From: wwp <subscript@free.fr> Date: Sat, 24 Oct 2020 13:15:16 +0200 Subject: [PATCH] Reworked fixing unsecure command-line invocation in templates' |program{} and |attach_program{}: fixed a leak, factorized, use glib stuff, parts come from msuchanek@suse.de (bug 4393). --- src/common/utils.c | 34 ++++++++ src/common/utils.h | 1 + src/quote_fmt_parse.y | 185 ++++++++++-------------------------------- 3 files changed, 76 insertions(+), 144 deletions(-) diff --git src/common/utils.c src/common/utils.c index 52a0eb3f5616..19ef5ab8827b 100644 --- src/common/utils.c +++ src/common/utils.c @@ -2607,6 +2607,8 @@ gint execute_command_line(const gchar *cmdline, gboolean async, gchar **argv; gint ret; + cm_return_val_if_fail(cmdline != NULL, -1); + debug_print("execute_command_line(): executing: %s\n", cmdline?cmdline:"(null)"); argv = strsplit_with_quote(cmdline, " ", 0); @@ -2639,6 +2641,38 @@ gchar *get_command_output(const gchar *cmdline) return child_stdout; } +FILE *get_command_output_stream(const char* cmdline) +{ + GPid pid; + GError *err = NULL; + gchar **argv = NULL; + int fd; + + cm_return_val_if_fail(cmdline != NULL, NULL); + + debug_print("get_command_output_stream(): executing: %s\n", cmdline); + + /* turn the command-line string into an array */ + if (!g_shell_parse_argv(cmdline, NULL, &argv, &err)) { + g_warning("could not parse command line from '%s': %s\n", cmdline, err->message); + g_error_free(err); + return NULL; + } + + if (!g_spawn_async_with_pipes(NULL, argv, NULL, G_SPAWN_SEARCH_PATH, + NULL, NULL, &pid, NULL, &fd, NULL, &err) + && err) + { + g_warning("could not spawn '%s': %s\n", cmdline, err->message); + g_error_free(err); + g_strfreev(argv); + return NULL; + } + + g_strfreev(argv); + return fdopen(fd, "r"); +} + static gint is_unchanged_uri_char(char c) { switch (c) { diff --git src/common/utils.h src/common/utils.h index 9816c4efcac9..842e467b38c7 100644 --- src/common/utils.h +++ src/common/utils.h @@ -442,6 +442,7 @@ gint execute_command_line (const gchar *cmdline, gboolean async, const gchar *working_directory); gchar *get_command_output (const gchar *cmdline); +FILE *get_command_output_stream (const gchar *cmdline); /* open URI with external browser */ gint open_uri(const gchar *uri, const gchar *cmdline); diff --git src/quote_fmt_parse.y src/quote_fmt_parse.y index 3bb8cd4d1949..a7bed9081b35 100644 --- src/quote_fmt_parse.y +++ src/quote_fmt_parse.y @@ -1,6 +1,6 @@ /* - * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client - * Copyright (C) 1999-2007 Hiroyuki Yamamoto and the Claws Mail Team + * Claws Mail -- a GTK+ based, lightweight, and fast e-mail client + * Copyright (C) 1999-2020 The Claws Mail Team and Hiroyuki Yamamoto * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -25,10 +25,6 @@ #include <glib/gi18n.h> #include <ctype.h> -#include <errno.h> -#include <fcntl.h> -#include <sys/types.h> -#include <sys/wait.h> #include "procmsg.h" #include "procmime.h" @@ -525,91 +521,41 @@ static void quote_fmt_insert_file(const gchar *filename) static void quote_fmt_insert_program_output(const gchar *progname) { - int pipefd[2]; - pid_t pid; - - GError *error; - gint argc; - gchar **argv; - gboolean ret; - - /* turn the command-line string into an array */ - argv = NULL; - argc = 0; - error = NULL; - ret = g_shell_parse_argv (progname, &argc, &argv, &error); - if (!ret) { - g_error("could not parse command line from '%s'", progname); - return; - } + FILE *file; + char buffer[BUFFSIZE]; - if (pipe(pipefd) == -1) { - g_error("can't pipe - error %s", g_strerror(errno)); - return; + if ((file = get_command_output_stream(progname)) != NULL) { + while (fgets(buffer, sizeof(buffer), file)) { + INSERT(buffer); + } + close(file); } - - if (0 == (pid = fork())) { - /* - * redirect output to write end of pipe - */ - close(pipefd[0]); - dup2(pipefd[1], STDOUT_FILENO); - if (-1 == execvp(argv[0], argv)) - perror("execvp"); - } else { - char buffer[BUFFSIZE]; - int r; - - waitpid(pid, NULL, 0); - - g_strfreev (argv); - - /* - * make it non blocking - */ - if (-1 == fcntl(pipefd[0], F_SETFL, fcntl(pipefd[0], F_GETFL) | O_NONBLOCK)) - g_warning("set to non blocking failed"); - - /* - * get the output - */ - do { - r = read(pipefd[0], buffer, sizeof buffer - 1); - if (r > 0) { - buffer[r] = 0; - INSERT(buffer); - } - } while (r > 0); - - close(pipefd[0]); - close(pipefd[1]); - } } static void quote_fmt_insert_user_input(const gchar *varname) { - gchar *buf = NULL; - gchar *text = NULL; - - if (dry_run) - return; - - if ((text = g_hash_table_lookup(var_table, varname)) == NULL) { - buf = g_strdup_printf(_("Enter text to replace '%s'"), varname); - text = input_dialog(_("Enter variable"), buf, ""); - g_free(buf); - if (!text) - return; - g_hash_table_insert(var_table, g_strdup(varname), g_strdup(text)); - } else { - /* don't free the one in hashtable at the end */ - text = g_strdup(text); - } + gchar *buf = NULL; + gchar *text = NULL; + + if (dry_run) + return; + + if ((text = g_hash_table_lookup(var_table, varname)) == NULL) { + buf = g_strdup_printf(_("Enter text to replace '%s'"), varname); + text = input_dialog(_("Enter variable"), buf, ""); + g_free(buf); + if (!text) + return; + g_hash_table_insert(var_table, g_strdup(varname), g_strdup(text)); + } else { + /* don't free the one in hashtable at the end */ + text = g_strdup(text); + } - if (!text) - return; - INSERT(text); - g_free(text); + if (!text) + return; + INSERT(text); + g_free(text); } static void quote_fmt_attach_file(const gchar *filename) @@ -619,67 +565,18 @@ static void quote_fmt_attach_file(const gchar *filename) static void quote_fmt_attach_file_program_output(const gchar *progname) { - int pipefd[2]; - pid_t pid; - - GError *error; - gint argc; - gchar **argv; - gboolean ret; - - /* turn the command-line string into an array */ - argv = NULL; - argc = 0; - error = NULL; - ret = g_shell_parse_argv (progname, &argc, &argv, &error); - if (!ret) { - g_error("could not parse command line from '%s'", progname); - return; - } - - if (pipe(pipefd) == -1) { - g_error("can't pipe - error %s", g_strerror(errno)); - return; + FILE *file; + char buffer[BUFFSIZE]; + + if ((file = get_command_output_stream(progname)) != NULL) { + /* get first line only */ + if (fgets(buffer, sizeof(buffer), file)) { + /* trim trailing CR/LF */ + strretchomp(buffer); + attachments = g_list_append(attachments, g_strdup(buffer)); + } + close(file); } - - if (0 == (pid = fork())) { - /* - * redirect output to write end of pipe - */ - close(pipefd[0]); - dup2(pipefd[1], STDOUT_FILENO); - if (-1 == execvp(argv[0], argv)) - perror("execvp"); - } else { - char buffer[BUFFSIZE]; - int r; - - waitpid(pid, NULL, 0); - - g_strfreev (argv); - - /* - * make it non blocking - */ - if (-1 == fcntl(pipefd[0], F_SETFL, fcntl(pipefd[0], F_GETFL) | O_NONBLOCK)) - g_warning("set to non blocking failed"); - - /* - * get the output - */ - do { - r = read(pipefd[0], buffer, sizeof buffer - 1); - if (r > 0) { - buffer[r] = 0; - /* trim trailing CR/LF */ - strretchomp(buffer); - attachments = g_list_append(attachments, g_strdup(buffer)); - } - } while (r > 0); - - close(pipefd[0]); - close(pipefd[1]); - } } static gchar *quote_fmt_complete_address(const gchar *addr) -- 2.28.0
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