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/* 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;
const 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;
}
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