Add original unix v6

source/s1/chmod.c

@@ -0,0 +1,27 @@
+main(argc, argv)
+char **argv;
+{
+	register i, m;
+	register char *c;
+	int count;
+
+	if(argc < 3) {
+		printf("arg count\n");
+		exit(1);
+	}
+	c = argv[1];
+	m = 0;
+	for(m=0; *c; c++) {
+		if(*c < '0' || *c > '7') {
+			printf("bad mode\n");
+			exit(1);
+		}
+		m = (m<<3) | *c - '0';
+	}
+	for(i=2; i<argc; i++)
+		if(chmod(argv[i], m) < 0) {
+			count++;
+			perror(argv[i]);
+		}
+	exit(count);
+}