busybox/miscutils/eject.c
Denis Vlasenko 091965768d libbb: nuke BB_GETOPT_ERROR, always die if there are mutually exclusive options
find_pair                                            164     180     +16
passwd_main                                         1222    1230      +8
display_speed                                         91      96      +5
msh_main                                            1335    1339      +4
qrealloc                                              38      36      -2
refresh                                             1190    1182      -8
cut_main                                             543     532     -11
sendCgi                                             1807    1794     -13
getopt32                                            1063    1045     -18
arith                                               2077    2030     -47
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(add/remove: 0/0 grow/shrink: 4/6 up/down: 33/-99)            Total: -66 bytes
   text    data     bss     dec     hex filename
 781548    1168   11900  794616   c1ff8 busybox_old
 781452    1168   11900  794520   c1f98 busybox_unstripped
2007-07-21 13:27:44 +00:00

61 lines
1.6 KiB
C

/* vi: set sw=4 ts=4: */
/*
* eject implementation for busybox
*
* Copyright (C) 2004 Peter Willis <psyphreak@phreaker.net>
* Copyright (C) 2005 Tito Ragusa <farmatito@tiscali.it>
*
* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
*/
/*
* This is a simple hack of eject based on something Erik posted in #uclibc.
* Most of the dirty work blatantly ripped off from cat.c =)
*/
#include "libbb.h"
/* various defines swiped from linux/cdrom.h */
#define CDROMCLOSETRAY 0x5319 /* pendant of CDROMEJECT */
#define CDROMEJECT 0x5309 /* Ejects the cdrom media */
#define CDROM_DRIVE_STATUS 0x5326 /* Get tray position, etc. */
/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
#define CDS_TRAY_OPEN 2
#define FLAG_CLOSE 1
#define FLAG_SMART 2
int eject_main(int argc, char **argv);
int eject_main(int argc, char **argv)
{
unsigned long flags;
const char *device;
int dev, cmd;
opt_complementary = "?1:t--T:T--t";
flags = getopt32(argc, argv, "tT");
device = argv[optind] ? : "/dev/cdrom";
// We used to do "umount <device>" here, but it was buggy
// if something was mounted OVER cdrom and
// if cdrom is mounted many times.
//
// This works equally well (or better):
// #!/bin/sh
// umount /dev/cdrom
// eject
dev = xopen(device, O_RDONLY|O_NONBLOCK);
cmd = CDROMEJECT;
if (flags & FLAG_CLOSE
|| (flags & FLAG_SMART && ioctl(dev, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN))
cmd = CDROMCLOSETRAY;
ioctl_or_perror_and_die(dev, cmd, NULL, "%s", device);
if (ENABLE_FEATURE_CLEAN_UP)
close(dev);
return EXIT_SUCCESS;
}