[PATCH] tools/mkimage: use lseek rather than fstat for file size for -l option

[Peter Korsgaard]

Use lseek rather than fstat for file size for list mode, so
mkimage -l /dev/mtdblockN works (stat returns st_size == 0 for devices).

Notice that you have to use /dev/mtdblockN and not /dev/mtdN, as the
latter doesn't support mmap.

Signed-off-by: Peter Korsgaard <jacmet at sunsite.dk>
---
 tools/mkimage.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/mkimage.c b/tools/mkimage.c
index 58fd20f..aec74ab 100644
--- a/tools/mkimage.c
+++ b/tools/mkimage.c
@@ -205,8 +205,9 @@ NXTARG:		;
 		/*
 		 * list header information of existing image
 		 */
-		if (fstat(ifd, &sbuf) < 0) {
-			fprintf (stderr, "%s: Can't stat %s: %s\n",
+		sbuf.st_size = lseek(ifd, 0, SEEK_END);
+		if (sbuf.st_size == (off_t)-1) {
+			fprintf (stderr, "%s: Can't get size of %s: %s\n",
 				cmdname, imagefile, strerror(errno));
 			exit (EXIT_FAILURE);
 		}
-- 
1.5.6.5

-- 
Bye, Peter Korsgaard