diff options
| -rw-r--r-- | block/raw-posix.c | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/block/raw-posix.c b/block/raw-posix.c index 5a6a22b..a2c7508 100644 --- a/block/raw-posix.c +++ b/block/raw-posix.c @@ -1140,9 +1140,25 @@ static int cdrom_open(BlockDriverState *bs, const char *filename, int flags) static int cdrom_probe_device(const char *filename) { + int fd, ret; + int prio = 0; + if (strstart(filename, "/dev/cd", NULL)) - return 100; - return 0; + prio = 50; + + fd = open(filename, O_RDONLY | O_NONBLOCK); + if (fd < 0) { + goto out; + } + + /* Attempt to detect via a CDROM specific ioctl */ + ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT); + if (ret >= 0) + prio = 100; + + close(fd); +out: + return prio; } static int cdrom_is_inserted(BlockDriverState *bs) |