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-rw-r--r--release/src/router/busybox/miscutils/eject.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/release/src/router/busybox/miscutils/eject.c b/release/src/router/busybox/miscutils/eject.c
new file mode 100644
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+++ b/release/src/router/busybox/miscutils/eject.c
@@ -0,0 +1,116 @@
+/* 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 "libbb.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 dev_fd 3
+
+/* Code taken from the original eject (http://eject.sourceforge.net/),
+ * refactored it a bit for busybox (ne-bb@nicoerfurth.de) */
+
+#include <scsi/sg.h>
+#include <scsi/scsi.h>
+
+static void eject_scsi(const char *dev)
+{
+ 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);
+ }
+
+ /* 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;
+ }
+
+ 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" USE_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(device, O_RDONLY|O_NONBLOCK), 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;
+}