/* * Reads and displays CD-ROM volume name * * Several people have asked how to read CD volume names so I wrote this * small program to do it. * * usage: volname [<device-file>] * * Copyright (C) 2000-2001 Jeff Tranter (tranter@pobox.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 * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * mods from distributed source (eject-2.0.13) are by * Matthew Stoltenberg <d3matt@gmail.com> */ //config:config VOLNAME //config: bool "volname (1.7 kb)" //config: default y //config: help //config: Prints a CD-ROM volume name. //applet:IF_VOLNAME(APPLET(volname, BB_DIR_USR_BIN, BB_SUID_DROP)) //kbuild:lib-$(CONFIG_VOLNAME) += volname.o //usage:#define volname_trivial_usage //usage: "[DEVICE]" //usage:#define volname_full_usage "\n\n" //usage: "Show CD volume name of the DEVICE (default /dev/cdrom)" #include "libbb.h" int volname_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; int volname_main(int argc UNUSED_PARAM, char **argv) { int fd; char buffer[32]; const char *device; device = "/dev/cdrom"; if (argv[1]) { device = argv[1]; if (argv[2]) bb_show_usage(); } fd = xopen(device, O_RDONLY); xlseek(fd, 32808, SEEK_SET); xread(fd, buffer, 32); printf("%32.32s\n", buffer); if (ENABLE_FEATURE_CLEAN_UP) { close(fd); } return 0; }