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DISCONTINUED:openSUSE:11.2:Update
udftools
udftools-1.0.0b3-pktsetup-chardev.patch
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File udftools-1.0.0b3-pktsetup-chardev.patch of Package udftools
diff -puN pktsetup/pktsetup.c~pktsetup-char-dev pktsetup/pktsetup.c --- udftools-1.0.0b3/pktsetup/pktsetup.c~pktsetup-char-dev 2004-07-12 19:57:51.000000000 +0200 +++ udftools-1.0.0b3-petero/pktsetup/pktsetup.c 2004-07-14 00:34:02.471317888 +0200 @@ -1,5 +1,6 @@ /* * Copyright (c) 1999,2000 Jens Axboe <axboe@suse.de> + * Copyright (c) 2004 Peter Osterlund <petero2@telia.com> * * 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 @@ -19,6 +20,7 @@ #include <stdio.h> #include <fcntl.h> #include <sys/ioctl.h> +#include <sys/stat.h> #include <unistd.h> #include <getopt.h> #include <bits/types.h> @@ -33,8 +35,33 @@ #define PACKET_SETUP_DEV _IOW('X', 1, unsigned int) #define PACKET_TEARDOWN_DEV _IOW('X', 2, unsigned int) #endif +#ifndef PACKET_CTRL_CMD +#define PACKET_CTRL_CMD _IOWR('X', 1, struct pkt_ctrl_command) +#endif + +#define MAJOR(dev) ((dev & 0xfff00) >> 8) +#define MINOR(dev) ((dev & 0xff) | ((dev >> 12) & 0xfff00)) +#define MKDEV(ma,mi) ((mi & 0xff) | (ma << 8) | ((mi & ~0xff) << 12)) + +#define MISC_MAJOR 10 +#define CTL_DIR "/dev/pktcdvd" +#define CTL_DEV "control" + +#define PKT_CTRL_CMD_SETUP 0 +#define PKT_CTRL_CMD_TEARDOWN 1 +#define PKT_CTRL_CMD_STATUS 2 + +struct pkt_ctrl_command { + __u32 command; /* in: Setup, teardown, status */ + __u32 dev_index; /* in/out: Device index */ + __u32 dev; /* in/out: Device nr for cdrw device */ + __u32 pkt_dev; /* out: Device nr for packet device */ + __u32 num_devices; /* out: Largest device index + 1 */ + __u32 padding; +}; + -int init_cdrom(int fd) +static int init_cdrom(int fd) { if (ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT) < 0) { perror("drive not ready\n"); @@ -54,7 +81,7 @@ int init_cdrom(int fd) return 0; } -void setup_dev(char *pkt_device, char *device, int rem) +static void setup_dev(char *pkt_device, char *device, int rem) { int pkt_fd, dev_fd, cmd; @@ -88,29 +115,233 @@ void setup_dev(char *pkt_device, char *d close(pkt_fd); } -int usage(void) +static int usage(void) { - printf("pktsetup /dev/pktcdvd0 /dev/cdrom\tsetup device\n"); - printf("pktsetup -d /dev/pktcdvd0\t\ttear down device\n"); + printf("For pktcdvd < 0.2.0:\n"); + printf(" pktsetup /dev/pktcdvd0 /dev/cdrom setup device\n"); + printf(" pktsetup -d /dev/pktcdvd0 tear down device\n"); + printf("For pktcdvd >= 0.2.0:\n"); + printf(" pktsetup dev_name /dev/cdrom setup device\n"); + printf(" pktsetup -d dev_name tear down device\n"); + printf(" pktsetup -d major:minor tear down device\n"); + printf(" pktsetup -s show device mappings\n"); return 1; } +/* + * Find the minor device number for the pktcdvd control device. + */ +static int get_misc_minor(void) +{ + int minor; + char name[64]; + FILE *f; + + if ((f = fopen("/proc/misc", "r")) == NULL) + return -1; + while (fscanf(f, " %d %64s", &minor, name) == 2) { + if (strcmp(name, "pktcdvd") == 0) { + fclose(f); + return minor; + } + } + fclose(f); + return -1; +} + +static const char *pkt_dev_name(const char *dev) +{ + static char buf[128]; + snprintf(buf, sizeof(buf), "%s/%s", CTL_DIR, dev); + return buf; +} + +static void create_ctl_dev(void) +{ + int misc_minor; + struct stat stat_buf; + int dev; + + if ((misc_minor = get_misc_minor()) < 0) { + system("/sbin/modprobe pktcdvd"); + misc_minor = get_misc_minor(); + } + if (misc_minor < 0) { + fprintf(stderr, "Can't find pktcdvd character device\n"); + return; + } + dev = MKDEV(MISC_MAJOR, misc_minor); + + if ((stat(pkt_dev_name(CTL_DEV), &stat_buf) >= 0) && + S_ISCHR(stat_buf.st_mode) && (stat_buf.st_rdev == dev)) + return; /* Already set up */ + + mkdir(CTL_DIR, 0755); + unlink(pkt_dev_name(CTL_DEV)); + mknod(pkt_dev_name(CTL_DEV), S_IFCHR | 0644, dev); +} + +static int remove_stale_dev_node(int ctl_fd, char *devname) +{ + struct stat stat_buf; + int i, dev; + struct pkt_ctrl_command c; + + if (stat(pkt_dev_name(devname), &stat_buf) < 0) + return 0; + if (!S_ISBLK(stat_buf.st_mode)) + return 1; + dev = stat_buf.st_rdev; + memset(&c, 0, sizeof(struct pkt_ctrl_command)); + for (i = 0; ; i++) { + c.command = PKT_CTRL_CMD_STATUS; + c.dev_index = i; + if (ioctl(ctl_fd, PACKET_CTRL_CMD, &c) < 0) { + perror("ioctl"); + return 1; + } + if (i >= c.num_devices) + break; + if (c.pkt_dev == dev) + return 1; /* busy */ + } + unlink(pkt_dev_name(devname)); + return 0; +} + +static void setup_dev_chardev(char *pkt_device, char *device, int rem) +{ + struct pkt_ctrl_command c; + struct stat stat_buf; + int ctl_fd, dev_fd; + + memset(&c, 0, sizeof(struct pkt_ctrl_command)); + + create_ctl_dev(); + if ((ctl_fd = open(pkt_dev_name(CTL_DEV), O_RDONLY)) < 0) { + perror("ctl open"); + return; + } + + if (!rem) { + if ((dev_fd = open(device, O_RDONLY | O_NONBLOCK)) == -1) { + perror("open cd-rom"); + goto out_close; + } + if (init_cdrom(dev_fd)) { + close(dev_fd); + goto out_close; + } + close(dev_fd); + + if (stat(device, &stat_buf) < 0) { + perror("stat cd-rom"); + goto out_close; + } + if (!S_ISBLK(stat_buf.st_mode)) { + fprintf(stderr, "Not a block device\n"); + goto out_close; + } + c.command = PKT_CTRL_CMD_SETUP; + c.dev = stat_buf.st_rdev; + + if (remove_stale_dev_node(ctl_fd, pkt_device) != 0) { + fprintf(stderr, "Device node '%s' already in use\n", pkt_device); + goto out_close; + } + if (ioctl(ctl_fd, PACKET_CTRL_CMD, &c) < 0) { + perror("ioctl"); + goto out_close; + } + mknod(pkt_dev_name(pkt_device), S_IFBLK | 0640, c.pkt_dev); + } else { + int major, minor, remove_node; + + if ((stat(pkt_dev_name(pkt_device), &stat_buf) >= 0) && + S_ISBLK(stat_buf.st_mode)) { + major = MAJOR(stat_buf.st_rdev); + minor = MINOR(stat_buf.st_rdev); + remove_node = 1; + } else if (sscanf(pkt_device, "%d:%d", &major, &minor) == 2) { + remove_node = 0; + } else { + fprintf(stderr, "Can't find major/minor numbers\n"); + goto out_close; + } + + c.command = PKT_CTRL_CMD_TEARDOWN; + c.pkt_dev = MKDEV(major, minor); + if (ioctl(ctl_fd, PACKET_CTRL_CMD, &c) < 0) { + perror("ioctl"); + goto out_close; + } + if (remove_node) + unlink(pkt_dev_name(pkt_device)); + } + +out_close: + close(ctl_fd); +} + +static void show_mappings(void) +{ + struct pkt_ctrl_command c; + int ctl_fd, i; + + memset(&c, 0, sizeof(struct pkt_ctrl_command)); + + create_ctl_dev(); + if ((ctl_fd = open(pkt_dev_name(CTL_DEV), O_RDONLY)) < 0) { + perror("ctl open"); + return; + } + + for (i = 0; ; i++) { + c.command = PKT_CTRL_CMD_STATUS; + c.dev_index = i; + if (ioctl(ctl_fd, PACKET_CTRL_CMD, &c) < 0) { + perror("ioctl"); + goto out_close; + } + if (i >= c.num_devices) + break; + if (c.dev) { + printf("%2d : %d:%d -> %d:%d\n", + i, MAJOR(c.pkt_dev), MINOR(c.pkt_dev), + MAJOR(c.dev), MINOR(c.dev)); + } + } + +out_close: + close(ctl_fd); +} + int main(int argc, char **argv) { int rem = 0, c; + char *pkt_device; + char *device; if (argc == 1) return usage(); - while ((c = getopt(argc, argv, "d")) != EOF) { + while ((c = getopt(argc, argv, "ds?")) != EOF) { switch (c) { case 'd': rem = 1; break; + case 's': + show_mappings(); + return 0; default: return usage(); } } - setup_dev(argv[optind], argv[optind + 1], rem); + pkt_device = argv[optind]; + device = argv[optind + 1]; + if (strchr(pkt_device, '/')) + setup_dev(pkt_device, device, rem); + else + setup_dev_chardev(pkt_device, device, rem); return 0; } _ -- Peter Osterlund - petero2@telia.com http://w1.894.telia.com/~u89404340
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