diff options
author | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-02-08 18:04:00 +0300 |
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committer | Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> | 2008-02-08 18:04:00 +0300 |
commit | afdad653ac62e99d8da30e441d3414684146db19 (patch) | |
tree | f0b120ffa8686518f4914ce32f8a07aa5874f01c /miscutils/eject.c | |
parent | 534b8d04832bc28f16fde1f8473139c0f004ed25 (diff) |
- add eject -s for SCSI- and USB-devices (Nico Erfurth)
Diffstat (limited to 'miscutils/eject.c')
-rw-r--r-- | miscutils/eject.c | 87 |
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); |