Don't exit on the first file that can't be opened for head and fold

head.c

@@ -1,4 +1,5 @@
 /* See LICENSE file for copyright and license details. */
+#include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -33,8 +34,11 @@ main(int argc, char *argv[])
 	if(argc == 0) {
 		head(stdin, "<stdin>", n);
 	} else for(; argc > 0; argc--, argv++) {
-		if(!(fp = fopen(argv[0], "r")))
-			eprintf("fopen %s:", argv[0]);
+		if(!(fp = fopen(argv[0], "r"))) {
+			fprintf(stderr, "fopen %s: %s\n", argv[0],
+				strerror(errno));
+			continue;
+		}
 		head(fp, argv[0], n);
 		fclose(fp);
 	}