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