Support tail-ing multiple files

tail.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>
@@ -38,13 +39,17 @@ main(int argc, char *argv[])
 	} ARGEND;
 	if(argc == 0) {
 		tail(stdin, "<stdin>", n);
-	} else if(argc == 1) {
-		if(!(fp = fopen(argv[0], "r")))
-			eprintf("fopen %s:", argv[0]);
+	} else {
+		for (; argc > 0; argc--, argv++) {
+			if(!(fp = fopen(argv[0], "r"))) {
+				fprintf(stderr, "fopen %s: %s\n", argv[0],
+					strerror(errno));
+				continue;
+			}
 			tail(fp, argv[0], n);
 			fclose(fp);
-	} else
-		usage();
+		}
+	}
 
 	return EXIT_SUCCESS;
 }