source: MondoRescue/branches/2.2.5/mindi-busybox/miscutils/eject.c @ 1765

Last change on this file since 1765 was 1765, checked in by Bruno Cornec, 13 years ago

Update to busybox 1.7.2

File size: 1.6 KB
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * eject implementation for busybox
4 *
5 * Copyright (C) 2004  Peter Willis <psyphreak@phreaker.net>
6 * Copyright (C) 2005  Tito Ragusa <farmatito@tiscali.it>
7 *
8 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
9 */
10
11/*
12 * This is a simple hack of eject based on something Erik posted in #uclibc.
13 * Most of the dirty work blatantly ripped off from cat.c =)
14 */
15
16#include "libbb.h"
17
18/* various defines swiped from linux/cdrom.h */
19#define CDROMCLOSETRAY            0x5319  /* pendant of CDROMEJECT  */
20#define CDROMEJECT                0x5309  /* Ejects the cdrom media */
21#define CDROM_DRIVE_STATUS        0x5326  /* Get tray position, etc. */
22/* drive status possibilities returned by CDROM_DRIVE_STATUS ioctl */
23#define CDS_TRAY_OPEN        2
24
25#define FLAG_CLOSE  1
26#define FLAG_SMART  2
27
28int eject_main(int argc, char **argv);
29int eject_main(int argc, char **argv)
30{
31    unsigned long flags;
32    const char *device;
33    int dev, cmd;
34
35    opt_complementary = "?1:t--T:T--t";
36    flags = getopt32(argv, "tT");
37    device = argv[optind] ? : "/dev/cdrom";
38
39    // We used to do "umount <device>" here, but it was buggy
40    // if something was mounted OVER cdrom and
41    // if cdrom is mounted many times.
42    //
43    // This works equally well (or better):
44    // #!/bin/sh
45    // umount /dev/cdrom
46    // eject
47
48    dev = xopen(device, O_RDONLY|O_NONBLOCK);
49    cmd = CDROMEJECT;
50    if (flags & FLAG_CLOSE
51     || (flags & FLAG_SMART && ioctl(dev, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN))
52        cmd = CDROMCLOSETRAY;
53
54    ioctl_or_perror_and_die(dev, cmd, NULL, "%s", device);
55
56    if (ENABLE_FEATURE_CLEAN_UP)
57        close(dev);
58
59    return EXIT_SUCCESS;
60}
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