diff options
| author | Davidlohr Bueso | 2012-01-05 00:02:06 +0100 |
|---|---|---|
| committer | Karel Zak | 2012-01-05 17:09:27 +0100 |
| commit | 8150beac7ced4e35fef7a8db71caee72d455f180 (patch) | |
| tree | 41625537369e230c3b40b8f62d9d8522ff51f171 | |
| parent | fdisk: remove PACKED macro (diff) | |
| download | kernel-qcow2-util-linux-8150beac7ced4e35fef7a8db71caee72d455f180.tar.gz kernel-qcow2-util-linux-8150beac7ced4e35fef7a8db71caee72d455f180.tar.xz kernel-qcow2-util-linux-8150beac7ced4e35fef7a8db71caee72d455f180.zip | |
blkdev: add is_blkdev function
We should have the most basic of checks in this library to see whether or not a block device is being used.
Signed-off-by: Davidlohr Bueso <dave@gnu.org>
| -rw-r--r-- | include/blkdev.h | 3 | ||||
| -rw-r--r-- | lib/blkdev.c | 6 |
2 files changed, 9 insertions, 0 deletions
diff --git a/include/blkdev.h b/include/blkdev.h index 1a9119d43..6b1887976 100644 --- a/include/blkdev.h +++ b/include/blkdev.h @@ -86,6 +86,9 @@ struct hd_geometry { }; #endif +/* are we working with block device? */ +int is_blkdev(int fd); + /* Determine size in bytes */ off_t blkdev_find_size (int fd); diff --git a/lib/blkdev.c b/lib/blkdev.c index 9138b0d85..c59386d9c 100644 --- a/lib/blkdev.c +++ b/lib/blkdev.c @@ -35,6 +35,12 @@ blkdev_valid_offset (int fd, off_t offset) { return 1; } +int is_blkdev(int fd) +{ + struct stat st; + return (fstat(fd, &st) == 0 && S_ISBLK(st.st_mode)); +} + off_t blkdev_find_size (int fd) { uintmax_t high, low = 0; |