+/* 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>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
/*
* Most of the dirty work blatantly ripped off from cat.c =)
*/
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <unistd.h>
#include <sys/mount.h>
-#include <mntent.h>
-#include "busybox.h"
+#include "libbb.h"
+/* Must be after libbb.h: they need size_t */
+#include "fix_u32.h"
+#include <scsi/sg.h>
+#include <scsi/scsi.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 dev_fd 3
-extern int eject_main(int argc, char **argv)
+/* Code taken from the original eject (http://eject.sourceforge.net/),
+ * refactored it a bit for busybox (ne-bb@nicoerfurth.de) */
+
+static void eject_scsi(const char *dev)
{
- unsigned long flags;
- char *device;
- struct mntent *m;
-
- flags = bb_getopt_ulflags(argc, argv, "t");
- device=argv[optind] ? : DEFAULT_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);
+ static const char sg_commands[3][6] = {
+ { ALLOW_MEDIUM_REMOVAL, 0, 0, 0, 0, 0 },
+ { START_STOP, 0, 0, 0, 1, 0 },
+ { START_STOP, 0, 0, 0, 2, 0 }
+ };
+
+ unsigned i;
+ unsigned char sense_buffer[32];
+ unsigned char inqBuff[2];
+ sg_io_hdr_t io_hdr;
+
+ if ((ioctl(dev_fd, SG_GET_VERSION_NUM, &i) < 0) || (i < 30000))
+ bb_error_msg_and_die("not a sg device or old sg driver");
+
+ memset(&io_hdr, 0, sizeof(sg_io_hdr_t));
+ io_hdr.interface_id = 'S';
+ io_hdr.cmd_len = 6;
+ io_hdr.mx_sb_len = sizeof(sense_buffer);
+ io_hdr.dxfer_direction = SG_DXFER_NONE;
+ /* io_hdr.dxfer_len = 0; */
+ io_hdr.dxferp = inqBuff;
+ io_hdr.sbp = sense_buffer;
+ io_hdr.timeout = 2000;
+
+ for (i = 0; i < 3; i++) {
+ io_hdr.cmdp = (void *)sg_commands[i];
+ ioctl_or_perror_and_die(dev_fd, SG_IO, (void *)&io_hdr, "%s", dev);
}
- if (ioctl(bb_xopen( device, (O_RDONLY | O_NONBLOCK)),
- ( flags ? CDROMCLOSETRAY : CDROMEJECT)))
- {
- bb_perror_msg_and_die(device);
+
+ /* force kernel to reread partition table when new disc is inserted */
+ ioctl(dev_fd, BLKRRPART);
+}
+
+#define FLAG_CLOSE 1
+#define FLAG_SMART 2
+#define FLAG_SCSI 4
+
+static void eject_cdrom(unsigned flags, const char *dev)
+{
+ int cmd = CDROMEJECT;
+
+ if (flags & FLAG_CLOSE
+ || ((flags & FLAG_SMART) && ioctl(dev_fd, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN)
+ ) {
+ cmd = CDROMCLOSETRAY;
}
- return(EXIT_SUCCESS);
+
+ ioctl_or_perror_and_die(dev_fd, cmd, NULL, "%s", dev);
+}
+
+int eject_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int eject_main(int argc UNUSED_PARAM, char **argv)
+{
+ unsigned flags;
+ const char *device;
+
+ opt_complementary = "?1:t--T:T--t";
+ flags = getopt32(argv, "tT" IF_FEATURE_EJECT_SCSI("s"));
+ device = argv[optind] ? 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/cdrom
+ */
+
+ xmove_fd(xopen_nonblocking(device), dev_fd);
+
+ if (ENABLE_FEATURE_EJECT_SCSI && (flags & FLAG_SCSI))
+ eject_scsi(device);
+ else
+ eject_cdrom(flags, device);
+
+ if (ENABLE_FEATURE_CLEAN_UP)
+ close(dev_fd);
+
+ return EXIT_SUCCESS;
}
projects / oweals / busybox.git / blobdiff