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# Copyright (c) 2013 by Gilbert Ramirez <gram@alumni.rice.edu>
import subprocess
SUCCESS = 0
def exec_cmdv(cmdv, cwd=None, stdin=None):
"""Run the commands in cmdv, returning (retval, output),
where output is stdout and stderr combined.
If cwd is given, the child process runs in that directory.
If a filehandle is passed as stdin, it is used as stdin.
If there is an OS-level error, None is the retval."""
try:
output = subprocess.check_output(cmdv, stderr=subprocess.STDOUT,
cwd=cwd, stdin=stdin)
retval = SUCCESS
# If file isn't executable
except OSError, e:
output = str(e)
retval = None
# If process returns non-zero
except subprocess.CalledProcessError, e:
output = e.output
retval = e.returncode
return (retval, output)
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