busybox/miscutils/eject.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 "busybox.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)
{
	unsigned long flags;
	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;
	if (ioctl(dev, cmd)) {
		bb_perror_msg_and_die("%s", device);
	}

	if (ENABLE_FEATURE_CLEAN_UP)
		close(dev);

	return EXIT_SUCCESS;
}
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 "busybox.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
28	int eject_main(int argc, char **argv)
29	{
30	unsigned long flags;
31	char *device;
32	int dev, cmd;
33
34	opt_complementary = "?:?1:t--T:T--t";
35	flags = getopt32(argc, argv, "tT");
36	device = argv[optind] ? : "/dev/cdrom";
37
38	// We used to do "umount <device>" here, but it was buggy
39	// if something was mounted OVER cdrom and
40	// if cdrom is mounted many times.
41	//
42	// This works equally well (or better):
43	// #!/bin/sh
44	// umount /dev/cdrom
45	// eject
46
47	dev = xopen(device, O_RDONLY\|O_NONBLOCK);
48	cmd = CDROMEJECT;
49	if (flags & FLAG_CLOSE
50	\|\| (flags & FLAG_SMART && ioctl(dev, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN))
51	cmd = CDROMCLOSETRAY;
52	if (ioctl(dev, cmd)) {
53	bb_perror_msg_and_die("%s", device);
54	}
55
56	if (ENABLE_FEATURE_CLEAN_UP)
57	close(dev);
58
59	return EXIT_SUCCESS;
60	}