1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/*
* 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"
//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;
}
|
