author | Nishanth Amuluru <nishanth@fossee.in> |
Sat, 08 Jan 2011 11:20:57 +0530 | |
changeset 307 | c6bca38c1cbf |
permissions | -rw-r--r-- |
307
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Nishanth Amuluru <nishanth@fossee.in>
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""" |
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""" |
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import os, sys |
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import subprocess |
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import py |
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from subprocess import Popen, PIPE |
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def cmdexec(cmd): |
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""" return unicode output of executing 'cmd' in a separate process. |
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raise cmdexec.ExecutionFailed exeception if the command failed. |
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the exception will provide an 'err' attribute containing |
c6bca38c1cbf
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the error-output from the command. |
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if the subprocess module does not provide a proper encoding/unicode strings |
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sys.getdefaultencoding() will be used, if that does not exist, 'UTF-8'. |
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""" |
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process = subprocess.Popen(cmd, shell=True, |
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universal_newlines=True, |
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stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
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out, err = process.communicate() |
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if sys.version_info[0] < 3: # on py3 we get unicode strings, on py2 not |
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try: |
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default_encoding = sys.getdefaultencoding() # jython may not have it |
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except AttributeError: |
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default_encoding = sys.stdout.encoding or 'UTF-8' |
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out = unicode(out, process.stdout.encoding or default_encoding) |
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err = unicode(err, process.stderr.encoding or default_encoding) |
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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(py.error.Error): |
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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 'py.process.cmdexec.Error' |
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cmdexec.Error = ExecutionFailed |
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try: |
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ExecutionFailed.__module__ = 'py.process.cmdexec' |
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ExecutionFailed.__name__ = 'Error' |
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except (AttributeError, TypeError): |
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pass |