LXR busybox/miscutils/volname.c

   1/*
   2 * Reads and displays CD-ROM volume name
   3 *
   4 * Several people have asked how to read CD volume names so I wrote this
   5 * small program to do it.
   6 *
   7 * usage: volname [<device-file>]
   8 *
   9 * Copyright (C) 2000-2001 Jeff Tranter (tranter@pobox.com)
  10 *
  11 * This program is free software; you can redistribute it and/or modify
  12 * it under the terms of the GNU General Public License as published by
  13 * the Free Software Foundation; either version 2 of the License, or
  14 * (at your option) any later version.
  15 *
  16 * This program is distributed in the hope that it will be useful,
  17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19 * GNU General Public License for more details.
  20 *
  21 * You should have received a copy of the GNU General Public License
  22 * along with this program; if not, write to the Free Software
  23 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  24 */
  25
  26/*
  27 * mods from distributed source (eject-2.0.13) are by
  28 * Matthew Stoltenberg <d3matt@gmail.com>
  29 */
  30//config:config VOLNAME
  31//config:       bool "volname (1.6 kb)"
  32//config:       default y
  33//config:       help
  34//config:       Prints a CD-ROM volume name.
  35
  36//applet:IF_VOLNAME(APPLET(volname, BB_DIR_USR_BIN, BB_SUID_DROP))
  37
  38//kbuild:lib-$(CONFIG_VOLNAME) += volname.o
  39
  40//usage:#define volname_trivial_usage
  41//usage:       "[DEVICE]"
  42//usage:#define volname_full_usage "\n\n"
  43//usage:       "Show CD volume name of the DEVICE (default /dev/cdrom)"
  44
  45#include "libbb.h"
  46
  47int volname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  48int volname_main(int argc UNUSED_PARAM, char **argv)
  49{
  50        int fd;
  51        char buffer[32];
  52        const char *device;
  53
  54        device = "/dev/cdrom";
  55        if (argv[1]) {
  56                device = argv[1];
  57                if (argv[2])
  58                        bb_show_usage();
  59        }
  60
  61        fd = xopen(device, O_RDONLY);
  62        xlseek(fd, 32808, SEEK_SET);
  63        xread(fd, buffer, 32);
  64        printf("%32.32s\n", buffer);
  65        if (ENABLE_FEATURE_CLEAN_UP) {
  66                close(fd);
  67        }
  68        return 0;
  69}
  70