50 lines
1.8 KiB
Python
50 lines
1.8 KiB
Python
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import 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.Error exeception 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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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
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