/*
* cdrom_id - optical drive and media information prober
*
- * Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
+ * Copyright (C) 2008-2010 Kay Sievers <kay.sievers@vrfy.org>
*
* 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
#include "libudev.h"
#include "libudev-private.h"
-static int debug;
+static bool debug;
static void log_fn(struct udev *udev, int priority,
const char *file, int line, const char *fn,
static unsigned int cd_media_dvd_rom = 0;
static unsigned int cd_media_dvd_r = 0;
static unsigned int cd_media_dvd_rw = 0;
+static unsigned int cd_media_dvd_rw_ro = 0; /* restricted overwrite mode */
+static unsigned int cd_media_dvd_rw_seq = 0; /* sequential mode */
static unsigned int cd_media_dvd_ram = 0;
static unsigned int cd_media_dvd_plus_r = 0;
static unsigned int cd_media_dvd_plus_rw = 0;
struct sg_io_hdr sg_io;
};
-static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, int arg)
+static void scsi_cmd_init(struct udev *udev, struct scsi_cmd *cmd)
+{
+ memset(cmd, 0x00, sizeof(struct scsi_cmd));
+ cmd->cgc.quiet = 1;
+ cmd->cgc.sense = &cmd->_sense.s;
+ cmd->sg_io.interface_id = 'S';
+ cmd->sg_io.mx_sb_len = sizeof(cmd->_sense);
+ cmd->sg_io.cmdp = cmd->cgc.cmd;
+ cmd->sg_io.sbp = cmd->_sense.u;
+ cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO;
+}
+
+static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, unsigned char arg)
{
- if (i == 0) {
- memset(cmd, 0x00, sizeof(struct scsi_cmd));
- cmd->cgc.quiet = 1;
- cmd->cgc.sense = &cmd->_sense.s;
- memset(&cmd->sg_io, 0, sizeof(cmd->sg_io));
- cmd->sg_io.interface_id = 'S';
- cmd->sg_io.mx_sb_len = sizeof(cmd->_sense);
- cmd->sg_io.cmdp = cmd->cgc.cmd;
- cmd->sg_io.sbp = cmd->_sense.u;
- cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO;
- }
cmd->sg_io.cmd_len = i + 1;
cmd->cgc.cmd[i] = arg;
}
{
int ret = 0;
- cmd->sg_io.dxferp = buf;
- cmd->sg_io.dxfer_len = bufsize;
- cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;
+ if (bufsize > 0) {
+ cmd->sg_io.dxferp = buf;
+ cmd->sg_io.dxfer_len = bufsize;
+ cmd->sg_io.dxfer_direction = SG_DXFER_FROM_DEV;
+ } else {
+ cmd->sg_io.dxfer_direction = SG_DXFER_NONE;
+ }
if (ioctl(fd, SG_IO, &cmd->sg_io))
return -1;
return ret;
}
+static int media_lock(struct udev *udev, int fd, bool lock)
+{
+ int err;
+
+ /* disable the kernel's lock logic */
+ err = ioctl(fd, CDROM_CLEAR_OPTIONS, CDO_LOCK);
+ if (err < 0)
+ info(udev, "CDROM_CLEAR_OPTIONS, CDO_LOCK failed\n");
+
+ err = ioctl(fd, CDROM_LOCKDOOR, lock ? 1 : 0);
+ if (err < 0)
+ info(udev, "CDROM_LOCKDOOR failed\n");
+
+ return err;
+}
+
+static int media_eject(struct udev *udev, int fd)
+{
+ struct scsi_cmd sc;
+ int err;
+
+ scsi_cmd_init(udev, &sc);
+ scsi_cmd_set(udev, &sc, 0, 0x1b);
+ scsi_cmd_set(udev, &sc, 4, 0x02);
+ scsi_cmd_set(udev, &sc, 5, 0);
+ err = scsi_cmd_run(udev, &sc, fd, NULL, 0);
+ if ((err != 0)) {
+ info_scsi_cmd_err(udev, "START_STOP_UNIT", err);
+ return -1;
+ }
+ return 0;
+}
+
static int cd_capability_compat(struct udev *udev, int fd)
{
int capability;
return 0;
}
-static int cd_inquiry(struct udev *udev, int fd) {
+static int cd_inquiry(struct udev *udev, int fd)
+{
struct scsi_cmd sc;
unsigned char inq[128];
int err;
- memset (inq, 0, sizeof (inq));
+ scsi_cmd_init(udev, &sc);
scsi_cmd_set(udev, &sc, 0, 0x12);
scsi_cmd_set(udev, &sc, 4, 36);
scsi_cmd_set(udev, &sc, 5, 0);
err = scsi_cmd_run(udev, &sc, fd, inq, 36);
- if ((err < 0)) {
+ if ((err != 0)) {
info_scsi_cmd_err(udev, "INQUIRY", err);
return -1;
}
return 0;
}
-static int cd_profiles(struct udev *udev, int fd)
+static void feature_profile_media(struct udev *udev, int cur_profile)
{
- struct scsi_cmd sc;
- unsigned char header[8];
- unsigned char profiles[512];
- unsigned int cur_profile;
- unsigned int len;
- unsigned int i;
- int err;
-
- memset (header, 0, sizeof (header));
- scsi_cmd_set(udev, &sc, 0, 0x46);
- scsi_cmd_set(udev, &sc, 1, 0);
- scsi_cmd_set(udev, &sc, 8, sizeof(header));
- scsi_cmd_set(udev, &sc, 9, 0);
- err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
- if ((err < 0)) {
- info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
- return -1;
- }
-
- len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]);
- info(udev, "GET CONFIGURATION: number of profiles %i\n", len);
- if (len > sizeof(profiles)) {
- info(udev, "invalid number of profiles\n");
- return -1;
- }
-
- memset (profiles, 0, sizeof (profiles));
- scsi_cmd_set(udev, &sc, 0, 0x46);
- scsi_cmd_set(udev, &sc, 1, 1);
- scsi_cmd_set(udev, &sc, 6, len >> 16);
- scsi_cmd_set(udev, &sc, 7, len >> 8);
- scsi_cmd_set(udev, &sc, 8, len);
- scsi_cmd_set(udev, &sc, 9, 0);
- err = scsi_cmd_run(udev, &sc, fd, profiles, len);
- if ((err < 0)) {
- info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
- return -1;
- }
-
- /* device profiles */
- for (i = 12; i < profiles[11]; i += 4) {
- unsigned int profile = (profiles[i] << 8 | profiles[i + 1]);
- if (profile == 0)
- continue;
- info(udev, "profile 0x%02x\n", profile);
-
- switch (profile) {
- case 0x03:
- case 0x04:
- case 0x05:
- cd_mo = 1;
- break;
- case 0x10:
- cd_dvd_rom = 1;
- break;
- case 0x12:
- cd_dvd_ram = 1;
- break;
- case 0x13:
- case 0x14:
- cd_dvd_rw = 1;
- break;
- case 0x1B:
- cd_dvd_plus_r = 1;
- break;
- case 0x1A:
- cd_dvd_plus_rw = 1;
- break;
- case 0x2A:
- cd_dvd_plus_rw_dl = 1;
- break;
- case 0x2B:
- cd_dvd_plus_r_dl = 1;
- break;
- case 0x40:
- cd_bd = 1;
- break;
- case 0x41:
- case 0x42:
- cd_bd_r = 1;
- break;
- case 0x43:
- cd_bd_re = 1;
- break;
- case 0x50:
- cd_hddvd = 1;
- break;
- case 0x51:
- cd_hddvd_r = 1;
- break;
- case 0x52:
- cd_hddvd_rw = 1;
- break;
- default:
- break;
- }
- }
-
- /* current media profile */
- cur_profile = header[6] << 8 | header[7];
- info(udev, "current profile 0x%02x\n", cur_profile);
- if (cur_profile == 0) {
- info(udev, "no current profile, assuming no media\n");
- return -1;
- }
-
- cd_media = 1;
-
switch (cur_profile) {
case 0x03:
case 0x04:
case 0x05:
+ info(udev, "profile 0x%02x \n", cur_profile);
+ cd_media = 1;
cd_media_mo = 1;
break;
case 0x08:
+ info(udev, "profile 0x%02x media_cd_rom\n", cur_profile);
+ cd_media = 1;
cd_media_cd_rom = 1;
break;
case 0x09:
+ info(udev, "profile 0x%02x media_cd_r\n", cur_profile);
+ cd_media = 1;
cd_media_cd_r = 1;
break;
case 0x0a:
+ info(udev, "profile 0x%02x media_cd_rw\n", cur_profile);
+ cd_media = 1;
cd_media_cd_rw = 1;
break;
case 0x10:
+ info(udev, "profile 0x%02x media_dvd_ro\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_rom = 1;
break;
case 0x11:
+ info(udev, "profile 0x%02x media_dvd_r\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_r = 1;
break;
case 0x12:
+ info(udev, "profile 0x%02x media_dvd_ram\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_ram = 1;
break;
case 0x13:
+ info(udev, "profile 0x%02x media_dvd_rw_ro\n", cur_profile);
+ cd_media = 1;
+ cd_media_dvd_rw = 1;
+ cd_media_dvd_rw_ro = 1;
+ break;
case 0x14:
+ info(udev, "profile 0x%02x media_dvd_rw_seq\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_rw = 1;
+ cd_media_dvd_rw_seq = 1;
break;
case 0x1B:
+ info(udev, "profile 0x%02x media_dvd_plus_r\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_plus_r = 1;
break;
case 0x1A:
+ info(udev, "profile 0x%02x media_dvd_plus_rw\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_plus_rw = 1;
break;
case 0x2A:
+ info(udev, "profile 0x%02x media_dvd_plus_rw_dl\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_plus_rw_dl = 1;
break;
case 0x2B:
+ info(udev, "profile 0x%02x media_dvd_plus_r_dl\n", cur_profile);
+ cd_media = 1;
cd_media_dvd_plus_r_dl = 1;
break;
case 0x40:
+ info(udev, "profile 0x%02x media_bd\n", cur_profile);
+ cd_media = 1;
cd_media_bd = 1;
break;
case 0x41:
case 0x42:
+ info(udev, "profile 0x%02x media_bd_r\n", cur_profile);
+ cd_media = 1;
cd_media_bd_r = 1;
break;
case 0x43:
+ info(udev, "profile 0x%02x media_bd_re\n", cur_profile);
+ cd_media = 1;
cd_media_bd_re = 1;
break;
case 0x50:
+ info(udev, "profile 0x%02x media_hddvd\n", cur_profile);
+ cd_media = 1;
cd_media_hddvd = 1;
break;
case 0x51:
+ info(udev, "profile 0x%02x media_hddvd_r\n", cur_profile);
+ cd_media = 1;
cd_media_hddvd_r = 1;
break;
case 0x52:
+ info(udev, "profile 0x%02x media_hddvd_rw\n", cur_profile);
+ cd_media = 1;
cd_media_hddvd_rw = 1;
break;
default:
+ info(udev, "profile 0x%02x <ignored>\n", cur_profile);
break;
}
+}
+
+static int feature_profiles(struct udev *udev, const unsigned char *profiles, size_t size)
+{
+ unsigned int i;
+
+ for (i = 0; i+4 <= size; i += 4) {
+ int profile;
+
+ profile = profiles[i] << 8 | profiles[i+1];
+ switch (profile) {
+ case 0x03:
+ case 0x04:
+ case 0x05:
+ info(udev, "profile 0x%02x mo\n", profile);
+ cd_mo = 1;
+ break;
+ case 0x08:
+ info(udev, "profile 0x%02x cd_rom\n", profile);
+ cd_cd_rom = 1;
+ break;
+ case 0x09:
+ info(udev, "profile 0x%02x cd_r\n", profile);
+ cd_cd_r = 1;
+ break;
+ case 0x0A:
+ info(udev, "profile 0x%02x cd_rw\n", profile);
+ cd_cd_rw = 1;
+ break;
+ case 0x10:
+ info(udev, "profile 0x%02x dvd_rom\n", profile);
+ cd_dvd_rom = 1;
+ break;
+ case 0x12:
+ info(udev, "profile 0x%02x dvd_ram\n", profile);
+ cd_dvd_ram = 1;
+ break;
+ case 0x13:
+ case 0x14:
+ info(udev, "profile 0x%02x dvd_rw\n", profile);
+ cd_dvd_rw = 1;
+ break;
+ case 0x1B:
+ info(udev, "profile 0x%02x dvd_plus_r\n", profile);
+ cd_dvd_plus_r = 1;
+ break;
+ case 0x1A:
+ info(udev, "profile 0x%02x dvd_plus_rw\n", profile);
+ cd_dvd_plus_rw = 1;
+ break;
+ case 0x2A:
+ info(udev, "profile 0x%02x dvd_plus_rw_dl\n", profile);
+ cd_dvd_plus_rw_dl = 1;
+ break;
+ case 0x2B:
+ info(udev, "profile 0x%02x dvd_plus_r_dl\n", profile);
+ cd_dvd_plus_r_dl = 1;
+ break;
+ case 0x40:
+ cd_bd = 1;
+ info(udev, "profile 0x%02x bd\n", profile);
+ break;
+ case 0x41:
+ case 0x42:
+ cd_bd_r = 1;
+ info(udev, "profile 0x%02x bd_r\n", profile);
+ break;
+ case 0x43:
+ cd_bd_re = 1;
+ info(udev, "profile 0x%02x bd_re\n", profile);
+ break;
+ case 0x50:
+ cd_hddvd = 1;
+ info(udev, "profile 0x%02x hddvd\n", profile);
+ break;
+ case 0x51:
+ cd_hddvd_r = 1;
+ info(udev, "profile 0x%02x hddvd_r\n", profile);
+ break;
+ case 0x52:
+ cd_hddvd_rw = 1;
+ info(udev, "profile 0x%02x hddvd_rw\n", profile);
+ break;
+ default:
+ info(udev, "profile 0x%02x <ignored>\n", profile);
+ break;
+ }
+ }
+ return 0;
+}
+
+/* returns 0 if media was detected */
+static int cd_profiles_old_mmc(struct udev *udev, int fd)
+{
+ struct scsi_cmd sc;
+ int err;
+
+ unsigned char header[32];
+
+ scsi_cmd_init(udev, &sc);
+ scsi_cmd_set(udev, &sc, 0, 0x51);
+ scsi_cmd_set(udev, &sc, 8, sizeof(header));
+ scsi_cmd_set(udev, &sc, 9, 0);
+ err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
+ if ((err != 0)) {
+ info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
+ if (cd_media == 1) {
+ info(udev, "no current profile, but disc is present; assuming CD-ROM\n");
+ cd_media_cd_rom = 1;
+ return 0;
+ } else {
+ info(udev, "no current profile, assuming no media\n");
+ return -1;
+ }
+ };
+
+ cd_media = 1;
+
+ if (header[2] & 16) {
+ cd_media_cd_rw = 1;
+ info(udev, "profile 0x0a media_cd_rw\n");
+ } else if ((header[2] & 3) < 2 && cd_cd_r) {
+ cd_media_cd_r = 1;
+ info(udev, "profile 0x09 media_cd_r\n");
+ } else {
+ cd_media_cd_rom = 1;
+ info(udev, "profile 0x08 media_cd_rom\n");
+ }
return 0;
}
+/* returns 0 if media was detected */
+static int cd_profiles(struct udev *udev, int fd)
+{
+ struct scsi_cmd sc;
+ unsigned char features[65530];
+ unsigned int cur_profile = 0;
+ unsigned int len;
+ unsigned int i;
+ int err;
+ int ret;
+
+ ret = -1;
+
+ /* First query the current profile */
+ scsi_cmd_init(udev, &sc);
+ scsi_cmd_set(udev, &sc, 0, 0x46);
+ scsi_cmd_set(udev, &sc, 8, 8);
+ scsi_cmd_set(udev, &sc, 9, 0);
+ err = scsi_cmd_run(udev, &sc, fd, features, 8);
+ if ((err != 0)) {
+ info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
+ /* handle pre-MMC2 drives which do not support GET CONFIGURATION */
+ if (SK(err) == 0x5 && ASC(err) == 0x20) {
+ info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n");
+ info(udev, "trying to work around the problem\n");
+ ret = cd_profiles_old_mmc(udev, fd);
+ }
+ goto out;
+ }
+
+ cur_profile = features[6] << 8 | features[7];
+ if (cur_profile > 0) {
+ info(udev, "current profile 0x%02x\n", cur_profile);
+ feature_profile_media (udev, cur_profile);
+ ret = 0; /* we have media */
+ } else {
+ info(udev, "no current profile, assuming no media\n");
+ }
+
+ len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
+ info(udev, "GET CONFIGURATION: size of features buffer 0x%04x\n", len);
+
+ if (len > sizeof(features)) {
+ info(udev, "can not get features in a single query, truncating\n");
+ len = sizeof(features);
+ } else if (len <= 8) {
+ len = sizeof(features);
+ }
+
+ /* Now get the full feature buffer */
+ scsi_cmd_init(udev, &sc);
+ scsi_cmd_set(udev, &sc, 0, 0x46);
+ scsi_cmd_set(udev, &sc, 7, ( len >> 8 ) & 0xff);
+ scsi_cmd_set(udev, &sc, 8, len & 0xff);
+ scsi_cmd_set(udev, &sc, 9, 0);
+ err = scsi_cmd_run(udev, &sc, fd, features, len);
+ if ((err != 0)) {
+ info_scsi_cmd_err(udev, "GET CONFIGURATION", err);
+ return -1;
+ }
+
+ /* parse the length once more, in case the drive decided to have other features suddenly :) */
+ len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3];
+ info(udev, "GET CONFIGURATION: size of features buffer 0x%04x\n", len);
+
+ if (len > sizeof(features)) {
+ info(udev, "can not get features in a single query, truncating\n");
+ len = sizeof(features);
+ }
+
+ /* device features */
+ for (i = 8; i+4 < len; i += (4 + features[i+3])) {
+ unsigned int feature;
+
+ feature = features[i] << 8 | features[i+1];
+
+ switch (feature) {
+ case 0x00:
+ info(udev, "GET CONFIGURATION: feature 'profiles', with %i entries\n", features[i+3] / 4);
+ feature_profiles(udev, &features[i]+4, features[i+3]);
+ break;
+ default:
+ info(udev, "GET CONFIGURATION: feature 0x%04x <ignored>, with 0x%02x bytes\n", feature, features[i+3]);
+ break;
+ }
+ }
+out:
+ return ret;
+}
+
static int cd_media_info(struct udev *udev, int fd)
{
struct scsi_cmd sc;
};
int err;
- memset (header, 0, sizeof (header));
+ scsi_cmd_init(udev, &sc);
scsi_cmd_set(udev, &sc, 0, 0x51);
- scsi_cmd_set(udev, &sc, 8, sizeof(header));
+ scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff);
scsi_cmd_set(udev, &sc, 9, 0);
err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
- if ((err < 0)) {
+ if ((err != 0)) {
info_scsi_cmd_err(udev, "READ DISC INFORMATION", err);
return -1;
};
+ cd_media = 1;
info(udev, "disk type %02x\n", header[8]);
+ info(udev, "hardware reported media status: %s\n", media_status[header[2] & 3]);
/* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */
- if (!cd_media_cd_rom && (header[2] & 3) < 4)
+ if (!cd_media_cd_rom)
cd_media_state = media_status[header[2] & 3];
- if ((header[2] & 3) != 2)
+ /* fresh DVD-RW in restricted overwite mode reports itself as
+ * "appendable"; change it to "blank" to make it consistent with what
+ * gets reported after blanking, and what userspace expects */
+ if (cd_media_dvd_rw_ro && (header[2] & 3) == 1)
+ cd_media_state = media_status[0];
+
+ /* DVD+RW discs (and DVD-RW in restricted mode) once formatted are
+ * always "complete", DVD-RAM are "other" or "complete" if the disc is
+ * write protected; we need to check the contents if it is blank */
+ if ((cd_media_dvd_rw_ro || cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) {
+ unsigned char buffer[32 * 2048];
+ unsigned char result, len;
+ int block, offset;
+
+ if (cd_media_dvd_ram) {
+ /* a write protected dvd-ram may report "complete" status */
+
+ unsigned char dvdstruct[8];
+ unsigned char format[12];
+
+ scsi_cmd_init(udev, &sc);
+ scsi_cmd_set(udev, &sc, 0, 0xAD);
+ scsi_cmd_set(udev, &sc, 7, 0xC0);
+ scsi_cmd_set(udev, &sc, 9, sizeof(dvdstruct));
+ scsi_cmd_set(udev, &sc, 11, 0);
+ err = scsi_cmd_run(udev, &sc, fd, dvdstruct, sizeof(dvdstruct));
+ if ((err != 0)) {
+ info_scsi_cmd_err(udev, "READ DVD STRUCTURE", err);
+ return -1;
+ }
+ if (dvdstruct[4] & 0x02) {
+ cd_media_state = media_status[2];
+ info(udev, "write-protected DVD-RAM media inserted\n");
+ goto determined;
+ }
+
+ /* let's make sure we don't try to read unformatted media */
+ scsi_cmd_init(udev, &sc);
+ scsi_cmd_set(udev, &sc, 0, 0x23);
+ scsi_cmd_set(udev, &sc, 8, sizeof(format));
+ scsi_cmd_set(udev, &sc, 9, 0);
+ err = scsi_cmd_run(udev, &sc, fd, format, sizeof(format));
+ if ((err != 0)) {
+ info_scsi_cmd_err(udev, "READ DVD FORMAT CAPACITIES", err);
+ return -1;
+ }
+
+ len = format[3];
+ if (len & 7 || len < 16) {
+ info(udev, "invalid format capacities length\n");
+ return -1;
+ }
+
+ switch(format[8] & 3) {
+ case 1:
+ info(udev, "unformatted DVD-RAM media inserted\n");
+ /* This means that last format was interrupted
+ * or failed, blank dvd-ram discs are factory
+ * formatted. Take no action here as it takes
+ * quite a while to reformat a dvd-ram and it's
+ * not automatically started */
+ goto determined;
+
+ case 2:
+ info(udev, "formatted DVD-RAM media inserted\n");
+ break;
+
+ case 3:
+ cd_media = 0; //return no media
+ info(udev, "format capacities returned no media\n");
+ return -1;
+ }
+ }
+
+ /* Take a closer look at formatted media (unformatted DVD+RW
+ * has "blank" status", DVD-RAM was examined earlier) and check
+ * for ISO and UDF PVDs or a fs superblock presence and do it
+ * in one ioctl (we need just sectors 0 and 16) */
+ scsi_cmd_init(udev, &sc);
+ scsi_cmd_set(udev, &sc, 0, 0x28);
+ scsi_cmd_set(udev, &sc, 5, 0);
+ scsi_cmd_set(udev, &sc, 8, 32);
+ scsi_cmd_set(udev, &sc, 9, 0);
+ err = scsi_cmd_run(udev, &sc, fd, buffer, sizeof(buffer));
+ if ((err != 0)) {
+ cd_media = 0;
+ info_scsi_cmd_err(udev, "READ FIRST 32 BLOCKS", err);
+ return -1;
+ }
+
+ /* if any non-zero data is found in sector 16 (iso and udf) or
+ * eventually 0 (fat32 boot sector, ext2 superblock, etc), disc
+ * is assumed non-blank */
+ result = 0;
+
+ for (block = 32768; block >= 0 && !result; block -= 32768) {
+ offset = block;
+ while (offset < (block + 2048) && !result) {
+ result = buffer [offset];
+ offset++;
+ }
+ }
+
+ if (!result) {
+ cd_media_state = media_status[0];
+ info(udev, "no data in blocks 0 or 16, assuming blank\n");
+ } else {
+ info(udev, "data in blocks 0 or 16, assuming complete\n");
+ }
+ }
+
+determined:
+ /* "other" is e. g. DVD-RAM, can't append sessions there; DVDs in
+ * restricted overwrite mode can never append, only in sequential mode */
+ if ((header[2] & 3) < 2 && !cd_media_dvd_rw_ro)
cd_media_session_next = header[10] << 8 | header[5];
cd_media_session_count = header[9] << 8 | header[4];
cd_media_track_count = header[11] << 8 | header[6];
{
struct scsi_cmd sc;
unsigned char header[12];
- unsigned char toc[2048];
- unsigned int len, i;
+ unsigned char toc[65536];
+ unsigned int len, i, num_tracks;
unsigned char *p;
int err;
- memset (header, 0, sizeof (header));
+ scsi_cmd_init(udev, &sc);
scsi_cmd_set(udev, &sc, 0, 0x43);
scsi_cmd_set(udev, &sc, 6, 1);
- scsi_cmd_set(udev, &sc, 8, sizeof(header));
+ scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff);
scsi_cmd_set(udev, &sc, 9, 0);
err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
- if ((err < 0)) {
+ if ((err != 0)) {
info_scsi_cmd_err(udev, "READ TOC", err);
return -1;
}
len = (header[0] << 8 | header[1]) + 2;
- info(udev, "READ TOC: len: %d\n", len);
+ info(udev, "READ TOC: len: %d, start track: %d, end track: %d\n", len, header[2], header[3]);
if (len > sizeof(toc))
return -1;
if (len < 2)
return -1;
+ /* 2: first track, 3: last track */
+ num_tracks = header[3] - header[2] + 1;
/* empty media has no tracks */
if (len < 8)
return 0;
- memset (toc, 0, sizeof (toc));
+ scsi_cmd_init(udev, &sc);
scsi_cmd_set(udev, &sc, 0, 0x43);
scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */
- scsi_cmd_set(udev, &sc, 7, len >> 8);
- scsi_cmd_set(udev, &sc, 8, len);
+ scsi_cmd_set(udev, &sc, 7, (len >> 8) & 0xff);
+ scsi_cmd_set(udev, &sc, 8, len & 0xff);
scsi_cmd_set(udev, &sc, 9, 0);
err = scsi_cmd_run(udev, &sc, fd, toc, len);
- if ((err < 0)) {
+ if ((err != 0)) {
info_scsi_cmd_err(udev, "READ TOC (tracks)", err);
return -1;
}
- for (p = toc+4, i = 4; i < len-8; i += 8, p += 8) {
+ /* Take care to not iterate beyond the last valid track as specified in
+ * the TOC, but also avoid going beyond the TOC length, just in case
+ * the last track number is invalidly large */
+ for (p = toc+4, i = 4; i < len-8 && num_tracks > 0; i += 8, p += 8, --num_tracks) {
unsigned int block;
unsigned int is_data_track;
cd_media_track_count_audio++;
}
- memset (header, 0, sizeof (header));
+ scsi_cmd_init(udev, &sc);
scsi_cmd_set(udev, &sc, 0, 0x43);
scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */
- scsi_cmd_set(udev, &sc, 8, 12);
+ scsi_cmd_set(udev, &sc, 8, sizeof(header));
scsi_cmd_set(udev, &sc, 9, 0);
err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header));
- if ((err < 0)) {
+ if ((err != 0)) {
info_scsi_cmd_err(udev, "READ TOC (multi session)", err);
return -1;
}
{
struct udev *udev;
static const struct option options[] = {
- { "export", no_argument, NULL, 'x' },
+ { "lock-media", no_argument, NULL, 'l' },
+ { "unlock-media", no_argument, NULL, 'u' },
+ { "eject-media", no_argument, NULL, 'e' },
{ "debug", no_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{}
};
+ bool eject = false;
+ bool lock = false;
+ bool unlock = false;
const char *node = NULL;
- int export = 0;
int fd = -1;
int cnt;
int rc = 0;
while (1) {
int option;
- option = getopt_long(argc, argv, "dxh", options, NULL);
+ option = getopt_long(argc, argv, "deluh", options, NULL);
if (option == -1)
break;
switch (option) {
+ case 'l':
+ lock = true;
+ break;
+ case 'u':
+ unlock = true;
+ break;
+ case 'e':
+ eject = true;
+ break;
case 'd':
- debug = 1;
+ debug = true;
if (udev_get_log_priority(udev) < LOG_INFO)
udev_set_log_priority(udev, LOG_INFO);
break;
- case 'x':
- export = 1;
- break;
case 'h':
printf("Usage: cdrom_id [options] <device>\n"
- " --export export key/value pairs\n"
+ " --lock-media lock the media (to enable eject request events)\n"
+ " --unlock-media unlock the media\n"
+ " --eject-media eject the media\n"
" --debug debug to stderr\n"
" --help print this help text\n\n");
goto exit;
/* check if drive talks MMC */
if (cd_inquiry(udev, fd) < 0)
- goto print;
+ goto work;
/* read drive and possibly current profile */
- if (cd_profiles(udev, fd) < 0)
- goto print;
+ if (cd_profiles(udev, fd) != 0)
+ goto work;
+
+ /* at this point we are guaranteed to have media in the drive - find out more about it */
/* get session/track info */
- if (cd_media_toc(udev, fd) < 0)
- goto print;
+ cd_media_toc(udev, fd);
/* get writable media state */
- if (cd_media_info(udev, fd) < 0)
- goto print;
+ cd_media_info(udev, fd);
+
+work:
+ /* lock the media, so we enable eject button events */
+ if (lock && cd_media) {
+ info(udev, "PREVENT_ALLOW_MEDIUM_REMOVAL (lock)\n");
+ media_lock(udev, fd, true);
+ }
+
+ if (unlock && cd_media) {
+ info(udev, "PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)\n");
+ media_lock(udev, fd, false);
+ }
+
+ if (eject) {
+ info(udev, "PREVENT_ALLOW_MEDIUM_REMOVAL (unlock)\n");
+ media_lock(udev, fd, false);
+ info(udev, "START_STOP_UNIT (eject)\n");
+ media_eject(udev, fd);
+ }
-print:
printf("ID_CDROM=1\n");
if (cd_cd_rom)
printf("ID_CDROM_CD=1\n");
printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next);
if (cd_media_session_count > 0)
printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count);
+ if (cd_media_session_count > 1 && cd_media_session_last_offset > 0)
+ printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);
if (cd_media_track_count > 0)
printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count);
if (cd_media_track_count_audio > 0)
printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio);
if (cd_media_track_count_data > 0)
printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data);
- if (cd_media_session_last_offset > 0)
- printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset);
exit:
if (fd >= 0)
close(fd);
udev_log_close();
return rc;
}
-
~ianmdlvl / elogind.git / blobdiff