--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/uprogs/rm.c	Sun Oct 22 18:25:39 2017 +0900
@@ -0,0 +1,23 @@
+#include "types.h"
+#include "stat.h"
+#include "user.h"
+
+int
+main(int argc, char *argv[])
+{
+  int i;
+
+  if(argc < 2){
+    printf(2, "Usage: rm files...\n");
+    exit();
+  }
+
+  for(i = 1; i < argc; i++){
+    if(unlink(argv[i]) < 0){
+      printf(2, "rm: %s failed to delete\n", argv[i]);
+      break;
+    }
+  }
+
+  exit();
+}