make sipb-xen-remote-proxy a bit less obscure

[invirt/packages/invirt-remote.git] / files / usr / sbin / sipb-xen-remote-listvms

diff --git a/files/usr/sbin/sipb-xen-remote-listvms b/files/usr/sbin/sipb-xen-remote-listvms
index eaefffd..1bb22fb 100755 (executable)
--- a/files/usr/sbin/sipb-xen-remote-listvms
+++ b/files/usr/sbin/sipb-xen-remote-listvms
@@ -1,14 +1,26 @@
-#!/usr/bin/env python2.5
+#!/usr/bin/python
 
 """
 Collates the results of listvms from multiple VM servers.  Part of the xvm
 suite.
 """
 
-from itertools import chain
-from subprocess import CalledProcessError, PIPE, Popen
-from sys import argv, stdout
-from yaml import safe_dump, safe_load
+from subprocess import PIPE, Popen
+try:
+    from subprocess import CalledProcessError
+except ImportError:
+    # Python 2.4 doesn't implement CalledProcessError
+    class CalledProcessError(Exception):
+        """This exception is raised when a process run by check_call() returns
+        a non-zero exit status. The exit status will be stored in the
+        returncode attribute."""
+        def __init__(self, returncode, cmd):
+            self.returncode = returncode
+            self.cmd = cmd
+        def __str__(self):
+            return "Command '%s' returned non-zero exit status %d" % (self.cmd, self.returncode)
+import sys
+import yaml
 
 ###
 
@@ -23,17 +35,18 @@ def main(argv):
     outputs = [p.communicate()[0] for p in pipes]
     for p in pipes:
         if p.returncode != 0:
-            raise CalledProcessError(p.returncode, cmd)
-    results = [safe_load(o) for o in outputs]
+            raise CalledProcessError(p.returncode, 'remctl')
+    results = [yaml.load(o, yaml.CSafeLoader) for o in outputs]
     results = filter(lambda x: x is not None, results)
 
     # Merge the results and print.
     merged = {}
     for result in results:
         merged.update(result)
-    print safe_dump(merged, default_flow_style=False)
+
+    print yaml.dump(merged, Dumper=yaml.CSafeDumper, default_flow_style=False)
 
 if __name__ == '__main__':
-    main(argv)
+    main(sys.argv)
 
-# vim:et:sw=2:ts=4
+# vim:et:sw=4:ts=4