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