From: Cole Robinson <crobinso@redhat.com>
To: qemu-devel@nongnu.org
Cc: Cole Robinson <crobinso@redhat.com>
Subject: [Qemu-devel] [PATCH] raw-posix: Detect CDROM via ioctl
Date: Mon, 11 Jan 2010 13:30:18 -0500 [thread overview]
Message-ID: <1263234619-14522-1-git-send-email-crobinso@redhat.com> (raw)
Current CDROM detection is hardcoded based on source file name.
Make this smarter by attempting a CDROM specific ioctl.
This makes '-cdrom /dev/sr0' succeed with no media present.
Signed-off-by: Cole Robinson <crobinso@redhat.com>
---
block/raw-posix.c | 18 +++++++++++++++++-
1 files changed, 17 insertions(+), 1 deletions(-)
diff --git a/block/raw-posix.c b/block/raw-posix.c
index 5a6a22b..3ec58d0 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;
+
if (strstart(filename, "/dev/cd", NULL))
return 100;
- return 0;
+
+ fd = open(filename, O_RDONLY | O_NONBLOCK);
+ if (fd < 0) {
+ return 0;
+ }
+
+ /* Attempt to detect via a CDROM specific ioctl */
+ if (ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT) < 0 && errno == EINVAL) {
+ ret = 0;
+ } else {
+ ret = 100;
+ }
+
+ close(fd);
+ return ret;
}
static int cdrom_is_inserted(BlockDriverState *bs)
--
1.6.6
next reply other threads:[~2010-01-11 18:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-01-11 18:30 Cole Robinson [this message]
2010-01-11 23:13 ` [Qemu-devel] [PATCH] raw-posix: Detect CDROM via ioctl Simon Horman
2010-01-12 0:01 ` Cole Robinson
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