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authorGravatar Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-02-08 15:04:00 +0000
committerGravatar Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-02-08 15:04:00 +0000
commitafdad653ac62e99d8da30e441d3414684146db19 (patch)
treef0b120ffa8686518f4914ce32f8a07aa5874f01c /miscutils/eject.c
parent534b8d04832bc28f16fde1f8473139c0f004ed25 (diff)
downloadbusybox-afdad653ac62e99d8da30e441d3414684146db19.tar.gz
busybox-afdad653ac62e99d8da30e441d3414684146db19.tar.bz2
- add eject -s for SCSI- and USB-devices (Nico Erfurth)
Diffstat (limited to 'miscutils/eject.c')
-rw-r--r--miscutils/eject.c87
1 files changed, 70 insertions, 17 deletions
diff --git a/miscutils/eject.c b/miscutils/eject.c
index 99f01aba9..746a0184e 100644
--- a/miscutils/eject.c
+++ b/miscutils/eject.c
@@ -25,33 +25,86 @@
#define FLAG_CLOSE 1
#define FLAG_SMART 2
+
+/* Code taken from the original eject (http://eject.sourceforge.net/),
+ * refactored it a bit for busybox (ne-bb@nicoerfurth.de) */
+#define FLAG_SCSI 4
+
+#include <scsi/sg.h>
+#include <scsi/scsi.h>
+static void eject_scsi(const int fd, const char * const dev)
+{
+ int i;
+ unsigned char sense_buffer[32];
+ unsigned char inqBuff[2];
+ sg_io_hdr_t io_hdr;
+ 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}
+ };
+
+ if ((ioctl(fd, SG_GET_VERSION_NUM, &i) < 0) || (i < 30000))
+ bb_error_msg_and_die("not an 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 = sg_commands[i];
+ ioctl_or_perror_and_die(fd, SG_IO, (void *)&io_hdr, "%s", dev);
+ }
+
+ /* force kernel to reread partition table when new disc inserted */
+ ioctl(fd, BLKRRPART);
+}
+
+static void eject_cdrom(const int fd, const unsigned long flags,
+ const char * const dev)
+{
+ int cmd = CDROMEJECT;
+
+ if (flags & FLAG_CLOSE
+ || (flags & FLAG_SMART && ioctl(fd, CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN))
+ cmd = CDROMCLOSETRAY;
+
+ return ioctl_or_perror_and_die(fd, cmd, NULL, "%s", dev);
+}
+
int eject_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int eject_main(int argc, char **argv)
{
unsigned long flags;
const char *device;
- int dev, cmd;
+ int dev;
opt_complementary = "?1:t--T:T--t";
- flags = getopt32(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
+ 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 = 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;
- ioctl_or_perror_and_die(dev, cmd, NULL, "%s", device);
+ if (ENABLE_FEATURE_EJECT_SCSI && (flags & FLAG_SCSI))
+ eject_scsi(dev, device);
+ else
+ eject_cdrom(dev, flags, device);
if (ENABLE_FEATURE_CLEAN_UP)
close(dev);