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75 lines
1.9 KiB
Python
75 lines
1.9 KiB
Python
#!/usr/bin/env python
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# encoding: utf-8
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# Jérôme Carretero 2011 (zougloub)
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# QNX neutrino compatibility functions
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import sys, os
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from waflib import Utils
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class Popen(object):
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"""
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Popen cannot work on QNX from a threaded program:
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Forking in threads is not implemented in neutrino.
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Python's os.popen / spawn / fork won't work when running in threads (they will if in the main program thread)
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In waf, this happens mostly in build.
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And the use cases can be replaced by os.system() calls.
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"""
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__slots__ = ["prog", "kw", "popen", "verbose"]
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verbose = 0
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def __init__(self, prog, **kw):
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try:
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self.prog = prog
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self.kw = kw
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self.popen = None
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if Popen.verbose:
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sys.stdout.write("Popen created: %r, kw=%r..." % (prog, kw))
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do_delegate = kw.get('stdout') == -1 and kw.get('stderr') == -1
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if do_delegate:
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if Popen.verbose:
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print("Delegating to real Popen")
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self.popen = self.real_Popen(prog, **kw)
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else:
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if Popen.verbose:
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print("Emulating")
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except Exception as e:
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if Popen.verbose:
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print("Exception: %s" % e)
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raise
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def __getattr__(self, name):
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if Popen.verbose:
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sys.stdout.write("Getattr: %s..." % name)
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if name in Popen.__slots__:
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if Popen.verbose:
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print("In slots!")
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return object.__getattr__(self, name)
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else:
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if self.popen is not None:
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if Popen.verbose:
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print("from Popen")
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return getattr(self.popen, name)
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else:
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if name == "wait":
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return self.emu_wait
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else:
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raise Exception("subprocess emulation: not implemented: %s" % name)
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def emu_wait(self):
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if Popen.verbose:
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print("emulated wait (%r kw=%r)" % (self.prog, self.kw))
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if isinstance(self.prog, str):
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cmd = self.prog
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else:
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cmd = " ".join(self.prog)
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if 'cwd' in self.kw:
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cmd = 'cd "%s" && %s' % (self.kw['cwd'], cmd)
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return os.system(cmd)
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if sys.platform == "qnx6":
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Popen.real_Popen = Utils.subprocess.Popen
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Utils.subprocess.Popen = Popen
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