all: Check for return value of lseek

1 files changed, 4 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index b224e5c..a6994b8 100644
--- a/src/main.c
+++ b/src/main.c
@@ -212,7 +212,10 @@ static void parse_image_arg(char * arg, struct image_list ** image_first) {
 			ERROR_INFO("Cannot get size of file %s", layout_file);
 			exit(1);
 		}
-		lseek(fd, 0, SEEK_SET);
+		if ( lseek(fd, 0, SEEK_SET) == (off_t)-1 ) {
+			ERROR_INFO("Cannot seek to begin of file %s", layout_file);
+			exit(1);
+		}
 		layout = malloc(len+1);
 		if ( ! layout ) {
 			ALLOC_ERROR();