sfdisk: don't use BLKRRPART to check loopdev usage

It seesm that kernel always returns EINVAL for BLKRRPART on loop
devices, we call the ioctl to check if nobody else uses the device.

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/disk-utils/sfdisk.c b/disk-utils/sfdisk.c
index 35c371d6ab6a279f38c71b365c8cb1f73391ca9d..d8428d1f37a7f8cba6115037e086257e337c8312 100644 (file)
--- a/disk-utils/sfdisk.c
+++ b/disk-utils/sfdisk.c
@@ -41,6 +41,7 @@
 #include "blkdev.h"
 #include "all-io.h"
 #include "rpmatch.h"
+#include "loopdev.h"
 
 #include "libfdisk.h"
 #include "fdisk-list.h"
@@ -1066,7 +1067,8 @@ static int is_device_used(struct sfdisk *sf)
        if (fd < 0)
                return 0;
 
-       if (fstat(fd, &st) == 0 && S_ISBLK(st.st_mode))
+       if (fstat(fd, &st) == 0 && S_ISBLK(st.st_mode)
+           && major(st.st_rdev) != LOOPDEV_MAJOR)
                return ioctl(fd, BLKRRPART) != 0;
 #endif
        return 0;