1 files changed, 4 insertions(+), 0 deletions(-)

M src/cksum.c

@@ 95,6 95,10 @@ main(int argc, char *argv[])
 	} else {
 		for (int i = 1; i < argc; ++i) {
 			int fd = open(argv[i], O_RDONLY);
+			if (fd < 0) {
+				perror(argv[i]);
+				return 1;
+			}
 			if (cksum(fd, argv[i]) != 0) {
 				close(fd);
 				return 1;