From: Davidlohr Bueso <dave@xxxxxxx>
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@xxxxxxx>
---
include/blkdev.h | 3 +++
lib/blkdev.c | 6 ++++++
2 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/include/blkdev.h b/include/blkdev.h
index 1a9119d..6b18879 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 9138b0d..c59386d 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;
--
1.7.4.1
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