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