*/
#include "busybox.h"
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
-#include <sys/mount.h>
-#include <mntent.h>
/* various defines swiped from linux/cdrom.h */
#define CDROMCLOSETRAY 0x5319 /* pendant of CDROMEJECT */
#define CDROMEJECT 0x5309 /* Ejects the cdrom media */
-#define DEFAULT_CDROM "/dev/cdrom"
+#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;
- struct mntent *m;
+ int dev, cmd;
- flags = bb_getopt_ulflags(argc, argv, "t");
- device = argv[optind] ? : DEFAULT_CDROM;
+ opt_complementary = "?:?1:t--T:T--t";
+ flags = getopt32(argc, argv, "tT");
+ device = argv[optind] ? : "/dev/cdrom";
- if ((m = find_mount_point(device, bb_path_mtab_file))) {
- if (umount(m->mnt_dir)) {
- bb_error_msg_and_die("Can't umount");
- } else if (ENABLE_FEATURE_MTAB_SUPPORT) {
- erase_mtab(m->mnt_fsname);
- }
- }
- if (ioctl(bb_xopen(device, (O_RDONLY | O_NONBLOCK)),
- (flags ? CDROMCLOSETRAY : CDROMEJECT))) {
+ // 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);
}
- return (EXIT_SUCCESS);
+
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(dev);
+
+ return EXIT_SUCCESS;
}