1 /* vi: set sw=4 ts=4: */
3 * eject implementation for busybox
5 * Copyright (C) 2004 Peter Willis <psyphreak@phreaker.net>
6 * Copyright (C) 2005 Tito Ragusa <farmatito@tiscali.it>
8 * Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
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 =)
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
27 /* Code taken from the original eject (http://eject.sourceforge.net/),
28 * refactored it a bit for busybox (ne-bb@nicoerfurth.de) */
31 #include <scsi/scsi.h>
33 static void eject_scsi(const char *dev)
35 static const char sg_commands[3][6] = {
36 { ALLOW_MEDIUM_REMOVAL, 0, 0, 0, 0, 0 },
37 { START_STOP, 0, 0, 0, 1, 0 },
38 { START_STOP, 0, 0, 0, 2, 0 }
42 unsigned char sense_buffer[32];
43 unsigned char inqBuff[2];
46 if ((ioctl(dev_fd, SG_GET_VERSION_NUM, &i) < 0) || (i < 30000))
47 bb_error_msg_and_die("not a sg device or old sg driver");
49 memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
50 io_hdr.interface_id = 'S';
52 io_hdr.mx_sb_len = sizeof(sense_buffer);
53 io_hdr.dxfer_direction = SG_DXFER_NONE;
54 /* io_hdr.dxfer_len = 0; */
55 io_hdr.dxferp = inqBuff;
56 io_hdr.sbp = sense_buffer;
57 io_hdr.timeout = 2000;
59 for (i = 0; i < 3; i++) {
60 io_hdr.cmdp = (void *)sg_commands[i];
61 ioctl_or_perror_and_die(dev_fd, SG_IO, (void *)&io_hdr, "%s", dev);
64 /* force kernel to reread partition table when new disc is inserted */
65 ioctl(dev_fd, BLKRRPART);
72 static void eject_cdrom(unsigned flags, const char *dev)
76 if (flags & FLAG_CLOSE
77 || (flags & FLAG_SMART && ioctl(dev_fd, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN)
82 ioctl_or_perror_and_die(dev_fd, cmd, NULL, "%s", dev);
85 int eject_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
86 int eject_main(int argc UNUSED_PARAM, char **argv)
91 opt_complementary = "?1:t--T:T--t";
92 flags = getopt32(argv, "tT" USE_FEATURE_EJECT_SCSI("s"));
93 device = argv[optind] ? argv[optind] : "/dev/cdrom";
95 /* We used to do "umount <device>" here, but it was buggy
96 if something was mounted OVER cdrom and
97 if cdrom is mounted many times.
99 This works equally well (or better):
105 xmove_fd(xopen(device, O_RDONLY|O_NONBLOCK), dev_fd);
107 if (ENABLE_FEATURE_EJECT_SCSI && (flags & FLAG_SCSI))
110 eject_cdrom(flags, device);
112 if (ENABLE_FEATURE_CLEAN_UP)