[libvirt] [PATCH 1/2] util: Introduce virFileCdromStatus
This private API helps check cdrom drive status via ioctl().
Signed-off-by: Han Han <hhan(a)redhat.com>
---
src/libvirt_private.syms | 1 +
src/util/virfile.c | 52 ++++++++++++++++++++++++++++++++++++++++
src/util/virfile.h | 10 ++++++++
3 files changed, 63 insertions(+)
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 5499a368c0..e9f79ad433 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -1797,6 +1797,7 @@ virFileActivateDirOverride;
virFileBindMountDevice;
virFileBuildPath;
virFileCanonicalizePath;
+virFileCdromStatus;
virFileChownFiles;
virFileClose;
virFileComparePaths;
diff --git a/src/util/virfile.c b/src/util/virfile.c
index 378d03ecf0..790d9448d2 100644
--- a/src/util/virfile.c
+++ b/src/util/virfile.c
@@ -2026,6 +2026,58 @@ virFileIsCDROM(const char *path)
return ret;
}
+/**
+ * virFileCdromStatus:
+ * @path: Cdrom path
+ *
+ * Returns:
+ * -1 error happends.
+ * VIR_FILE_CDROM_DISC_OK Cdrom is OK.
+ * VIR_FILE_CDROM_NO_INFO Information not available.
+ * VIR_FILE_CDROM_NO_DISC No disc in cdrom.
+ * VIR_FILE_CDROM_TREY_OPEN Cdrom is trey-open.
+ * VIR_FILE_CDROM_DRIVE_NOT_READY Cdrom is not ready.
+ * reported.
+ */
+int
+virFileCdromStatus(const char *path)
+{
+ int ret = -1;
+ int fd;
+
+ if ((fd = open(path, O_RDONLY | O_NONBLOCK)) < 0)
+ goto cleanup;
+
+ /* Attempt to detect CDROM status via ioctl */
+ if ((ret = ioctl(fd, CDROM_DRIVE_STATUS, CDSL_CURRENT)) >= 0) {
+ switch (ret) {
+ case CDS_NO_INFO:
+ ret = VIR_FILE_CDROM_NO_INFO;
+ goto cleanup;
+ break;
+ case CDS_NO_DISC:
+ ret = VIR_FILE_CDROM_NO_DISC;
+ goto cleanup;
+ break;
+ case CDS_TRAY_OPEN:
+ ret = VIR_FILE_CDROM_TREY_OPEN;
+ goto cleanup;
+ break;
+ case CDS_DRIVE_NOT_READY:
+ ret = VIR_FILE_CDROM_DRIVE_NOT_READY;
+ goto cleanup;
+ break;
+ case CDS_DISC_OK:
+ ret = VIR_FILE_CDROM_DISC_OK;
+ goto cleanup;
+ break;
+ }
+ }
+
+ cleanup:
+ VIR_FORCE_CLOSE(fd);
+ return ret;
+}
#else
int
diff --git a/src/util/virfile.h b/src/util/virfile.h
index 6f1e802fde..9d4701c8d2 100644
--- a/src/util/virfile.h
+++ b/src/util/virfile.h
@@ -212,6 +212,16 @@ int virFileIsSharedFS(const char *path) ATTRIBUTE_NONNULL(1);
int virFileIsMountPoint(const char *file) ATTRIBUTE_NONNULL(1);
int virFileIsCDROM(const char *path)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
+int virFileCdromStatus(const char *path)
+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_RETURN_CHECK;
+
+enum {
+ VIR_FILE_CDROM_DISC_OK = 1,
+ VIR_FILE_CDROM_NO_INFO,
+ VIR_FILE_CDROM_NO_DISC,
+ VIR_FILE_CDROM_TREY_OPEN,
+ VIR_FILE_CDROM_DRIVE_NOT_READY,
+};
int virFileGetMountSubtree(const char *mtabpath,
const char *prefix,
--
2.17.1