mirror of
https://github.com/brain-hackers/u-boot-brain
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73 lines
2.2 KiB
Python
73 lines
2.2 KiB
Python
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# Copyright (c) 2011 The Chromium OS Authors.
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#
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# See file CREDITS for list of people who contributed to this
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# project.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of
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# the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
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# MA 02111-1307 USA
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#
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import os
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import subprocess
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"""Shell command ease-ups for Python."""
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def RunPipe(pipeline, infile=None, outfile=None,
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capture=False, oneline=False, hide_stderr=False):
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"""
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Perform a command pipeline, with optional input/output filenames.
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hide_stderr Don't allow output of stderr (default False)
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"""
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last_pipe = None
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while pipeline:
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cmd = pipeline.pop(0)
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kwargs = {}
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if last_pipe is not None:
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kwargs['stdin'] = last_pipe.stdout
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elif infile:
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kwargs['stdin'] = open(infile, 'rb')
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if pipeline or capture:
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kwargs['stdout'] = subprocess.PIPE
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elif outfile:
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kwargs['stdout'] = open(outfile, 'wb')
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if hide_stderr:
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kwargs['stderr'] = open('/dev/null', 'wb')
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last_pipe = subprocess.Popen(cmd, **kwargs)
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if capture:
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ret = last_pipe.communicate()[0]
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if not ret:
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return None
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elif oneline:
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return ret.rstrip('\r\n')
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else:
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return ret
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else:
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return os.waitpid(last_pipe.pid, 0)[1] == 0
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def Output(*cmd):
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return RunPipe([cmd], capture=True)
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def OutputOneLine(*cmd):
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return RunPipe([cmd], capture=True, oneline=True)
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def Run(*cmd, **kwargs):
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return RunPipe([cmd], **kwargs)
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def RunList(cmd):
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return RunPipe([cmd], capture=True)
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