[PLUG-Devel] python exec probs

[der.hans]

moin moin,

I don't speak python, but I need to get something simple done via python.

Currently I'm trying to pass an argument to an external program and
capture the output.

I'm running Ubuntu 9.10 with python 2.6, but will be deploying on CentOS
with python 2.4.

Apparently the subprocess module was introduced in 2.4 and is replacing
all other mechanims for this.

http://docs.python.org/library/subprocess.html

$ cat /var/tmp/test.py
#!/usr/bin/python

import subprocess as sub

# shell_cmd = "/var/tmp/test.sh"
# file='/var/tmp/file.txt'

# p = sub.Popen( [shell_cmd, file], stdout=sub.PIPE )
p = sub.Popen(["/var/tmp/test.sh", "/var/tmp/file.txt"], stdout=sub.PIPE)
output = p.communicate()[0]

# print "%(output)d output" % { 'output': output }
$ /var/tmp/test.py
Traceback (most recent call last):
   File "/var/tmp/test.py", line 9, in <module>
     p = sub.Popen(["/var/tmp/test.sh", "/var/tmp/file.txt"],
stdout=sub.PIPE)
   File "/usr/lib/python2.6/subprocess.py", line 621, in __init__
     errread, errwrite)
   File "/usr/lib/python2.6/subprocess.py", line 1126, in _execute_child
     raise child_exception
OSError: [Errno 8] Exec format error
$ ls -l /var/tmp/test.sh 
-rwxr-xr-x 1 lufthans lufthans 268 2010-03-25 14:13 /var/tmp/test.sh
$ /var/tmp/test.sh 
2112

If I leave the square brackets off the command and file I get an error
about bufsize not being an integer. If I leave the brackets off and remove
the argument I still get the Exec format error.

How can I fix my code to get this working?

ciao,

der.hans
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