40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
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"a system command launcher"
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import os, sys
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import subprocess
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from subprocess import Popen, PIPE
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def cmdexec(cmd):
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""" return output of executing 'cmd' in a separate process.
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raise ExecutionFailed exception if the command failed.
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the exception will provide an 'err' attribute containing
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the error-output from the command.
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"""
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process = subprocess.Popen(cmd, shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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out, err = process.communicate()
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status = process.poll()
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if status:
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raise ExecutionFailed(status, status, cmd, out, err)
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return out
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class ExecutionFailed(Exception):
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def __init__(self, status, systemstatus, cmd, out, err):
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Exception.__init__(self)
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self.status = status
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self.systemstatus = systemstatus
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self.cmd = cmd
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self.err = err
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self.out = out
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def __str__(self):
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return "ExecutionFailed: %d %s\n%s" %(self.status, self.cmd, self.err)
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# export the exception under the name 'Error'
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Error = ExecutionFailed
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try:
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ExecutionFailed.__module__ = 'cmdexec'
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ExecutionFailed.__name__ = 'Error'
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except (AttributeError, TypeError):
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pass
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