Add the concept of a per-disk error string, and a function which prints it

along with the errno, if one is set.

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/libufs/block.c b/lib/libufs/block.c
index 054896f..45975b5 100644
--- a/lib/libufs/block.c
+++ b/lib/libufs/block.c
@@ -63,6 +63,7 @@ bread(struct uufsd *disk, ufs2_daddr_t blockno, void *data, size_t size)
 	 */
 	if (cnt != size) {
 		DEBUG("short read");
+		disk->d_error = "short read from block device";
 		for (cnt = 0; cnt < disk->d_fs.fs_bsize; cnt++)
 			buf[cnt] = 0;
 		return -1;
@@ -80,6 +81,7 @@ bwrite(struct uufsd *disk, ufs2_daddr_t blockno, const void *data, size_t size)
 	cnt = pwrite(disk->d_fd, data, size, (off_t)(blockno * disk->d_bsize));
 	if (cnt != size) {
 		DEBUG("short write");
+		disk->d_error = "short write to block device";
 		return -1;
 	}