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Trying to identfy CD device via ioctl(CDROM_DRIVE_STATUS)

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This commit is contained in:
Thomas Schmitt 2006-12-11 19:19:15 +00:00
parent d9e502ee5f
commit 17bac86aae
3 changed files with 44 additions and 8 deletions
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2
cdrskin/cdrskin.c
View File

@ -1719,7 +1719,7 @@ ata_bus:;
device_adr);
if(ret==0) {
fprintf(stderr,
"cdrskin: FATAL : Cannot find /dev/sgN with Bus,Target,Lun = %d,%d,%d\n",
"cdrskin: FATAL : Cannot find /dev/* with Bus,Target,Lun = %d,%d,%d\n",
busno,*driveno,lun_no);
fprintf(stderr,
"cdrskin: HINT : This drive may be in use by another program currently\n");

2
cdrskin/cdrskin_timestamp.h
View File

@ -1 +1 @@
#define Cdrskin_timestamP "2006.12.11.161952"
#define Cdrskin_timestamP "2006.12.11.191826"

42
libburn/sg-linux.c
View File

@ -74,6 +74,8 @@ Hint: You should also look into sg-freebsd-port.c, which is a younger and
#include <scsi/sg.h>
#include <scsi/scsi.h>
/* ts A61211 : to recognize CD devices on /dev/sr* */
#include <linux/cdrom.h>
/* ts A61211 : preparing for exploration of recent Linux ATA adventures */
@ -103,11 +105,23 @@ static int linux_sg_enumerate_debug = 0;
address parameters Host, Channel, Id, Lun and also Bus.
E.g.: "/dev/sg%d"
*/
/* NEW INFO: If hard disks at /dev/sr allow ioctl(CDROM_DRIVE_STATUS), they
are in danger.
If you want it less dangerous:
#undef CDROM_DRIVE_STATUS
but then you might need linux_sg_accept_any_type = 1 which
is _more dangerous_.
*/
/* !!! DO NOT SET TO sr%d UNLESS YOU PROTECTED ALL INDISPENSIBLE DEVICES
by chmod -rw . A test wether non-CD devices are properly excluded would
be well needed though. Heroic disks, scanners, etc. wanted !!! */
static char linux_sg_device_family[80] = {"/dev/sg%d"};
/* Set this to 1 in order to accept any TYPE_* (see scsi/scsi.h) */
/* !!! DO NOT SET TO 1 UNLESS YOU PROTECTED ALL HARD DISKS chmod -rw !!! */
/* NEW INFO: Try with 0 first. There is hope via CDROM_DRIVE_STATUS. */
/* !!! DO NOT SET TO 1 UNLESS YOU PROTECTED ALL INDISPENSIBLE DEVICES
chmod -rw !!! */
static int linux_sg_accept_any_type = 0;
@ -473,11 +487,32 @@ static void sg_enumerate(void)
/* found a drive */
sid_ret = ioctl(fd, SG_GET_SCSI_ID, &sid);
if (sid_ret == -1 && linux_sg_enumerate_debug)
if (sid_ret == -1) {
sid.scsi_id = -1; /* mark SCSI address as invalid */
if(linux_sg_enumerate_debug)
fprintf(stderr,
"ioctl(SG_GET_SCSI_ID) failed, errno=%d '%s' , ",
errno, strerror(errno));
#ifdef CDROM_DRIVE_STATUS
/* ts A61211 : not widening old acceptance range */
if (strcmp(linux_sg_device_family,"/dev/sg%d") != 0) {
/* http://developer.osdl.org/dev/robustmutexes/
src/fusyn.hg/Documentation/ioctl/cdrom.txt */
sid_ret = ioctl(fd, CDROM_DRIVE_STATUS, 0);
if(linux_sg_enumerate_debug)
fprintf(stderr,
"ioctl(CDROM_DRIVE_STATUS) = %d , ",
sid_ret);
if (sid_ret != -1 && sid_ret != CDS_NO_INFO)
sid.scsi_type = TYPE_ROM;
else
sid_ret = -1;
}
#endif /* CDROM_DRIVE_STATUS */
}
#ifdef SCSI_IOCTL_GET_BUS_NUMBER
/* Hearsay A61005 */
if (ioctl(fd, SCSI_IOCTL_GET_BUS_NUMBER, &bus_no) == -1)
@ -500,7 +535,7 @@ static void sg_enumerate(void)
continue;
}
if (sid_ret == -1) {
if (sid_ret == -1 || sid.scsi_id < 0) {
/* ts A61211 : employ a more general ioctl */
ret = sg_obtain_scsi_adr(fname, &bus_no, &host_no,
&channel_no, &target_no, &lun_no);
@ -513,6 +548,7 @@ static void sg_enumerate(void)
if (linux_sg_enumerate_debug)
fprintf(stderr,
"sg_obtain_scsi_adr() failed\n");
continue;
}
}