add directory study

study/linux-travel/MINIX-1.5/1.5/Source/commands/sleep.c

@@ -0,0 +1,27 @@
+/* sleep - suspend a process for x sec		Author: Andy Tanenbaum */
+
+main(argc, argv)
+int argc;
+char *argv[];
+{
+  register seconds;
+  register char c;
+
+  seconds = 0;
+
+  if (argc != 2) {
+	std_err("Usage: sleep time\n");
+	exit(1);
+  }
+  while (c = *(argv[1])++) {
+	if (c < '0' || c > '9') {
+		std_err("sleep: bad arg\n");
+		exit(1);
+	}
+	seconds = 10 * seconds + (c - '0');
+  }
+
+  /* Now sleep. */
+  sleep(seconds);
+  exit(0);
+}