1 files changed, 33 insertions, 12 deletions
diff --git a/do-until b/do-until
index d9dc863..4aea815 100755
--- a/do-until
+++ b/do-until
@@ -1,12 +1,33 @@
-#!/bin/sh
-#
-# do-until - run a command until it succeeds
-#
-# Lars Wirzenius <liw@liw.fi>
-
-cmdline="$@"
-while ! $cmdline
-do
-    echo "Command failed, trying again in 1 second"
-    sleep 1
-done
+#!/usr/bin/python
+
+
+"""Run a command until it succeeds.
+
+Lars Wirzenius <liw@liw.fi>
+"""
+
+
+import subprocess
+import sys
+import time
+
+
+def do_until(argv):
+    while True:
+        p = subprocess.Popen(argv)
+        p.communicate()
+        if p.returncode == 0:
+            break
+        sys.stderr.write("do-until: command failed, "
+                         "trying again in 1 second\n")
+        time.sleep(1)
+
+
+def main():
+    argv = sys.argv[1:]
+    if argv:
+        do_until(argv)
+
+
+if __name__ == "__main__":
+    main()