--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-win32-2.6.1/lib/popen2.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,201 @@
+"""Spawn a command with pipes to its stdin, stdout, and optionally stderr.
+
+The normal os.popen(cmd, mode) call spawns a shell command and provides a
+file interface to just the input or output of the process depending on
+whether mode is 'r' or 'w'. This module provides the functions popen2(cmd)
+and popen3(cmd) which return two or three pipes to the spawned command.
+"""
+
+import os
+import sys
+import warnings
+warnings.warn("The popen2 module is deprecated. Use the subprocess module.",
+ DeprecationWarning, stacklevel=2)
+
+__all__ = ["popen2", "popen3", "popen4"]
+
+try:
+ MAXFD = os.sysconf('SC_OPEN_MAX')
+except (AttributeError, ValueError):
+ MAXFD = 256
+
+_active = []
+
+def _cleanup():
+ for inst in _active[:]:
+ if inst.poll(_deadstate=sys.maxint) >= 0:
+ try:
+ _active.remove(inst)
+ except ValueError:
+ # This can happen if two threads create a new Popen instance.
+ # It's harmless that it was already removed, so ignore.
+ pass
+
+class Popen3:
+ """Class representing a child process. Normally, instances are created
+ internally by the functions popen2() and popen3()."""
+
+ sts = -1 # Child not completed yet
+
+ def __init__(self, cmd, capturestderr=False, bufsize=-1):
+ """The parameter 'cmd' is the shell command to execute in a
+ sub-process. On UNIX, 'cmd' may be a sequence, in which case arguments
+ will be passed directly to the program without shell intervention (as
+ with os.spawnv()). If 'cmd' is a string it will be passed to the shell
+ (as with os.system()). The 'capturestderr' flag, if true, specifies
+ that the object should capture standard error output of the child
+ process. The default is false. If the 'bufsize' parameter is
+ specified, it specifies the size of the I/O buffers to/from the child
+ process."""
+ _cleanup()
+ self.cmd = cmd
+ p2cread, p2cwrite = os.pipe()
+ c2pread, c2pwrite = os.pipe()
+ if capturestderr:
+ errout, errin = os.pipe()
+ self.pid = os.fork()
+ if self.pid == 0:
+ # Child
+ os.dup2(p2cread, 0)
+ os.dup2(c2pwrite, 1)
+ if capturestderr:
+ os.dup2(errin, 2)
+ self._run_child(cmd)
+ os.close(p2cread)
+ self.tochild = os.fdopen(p2cwrite, 'w', bufsize)
+ os.close(c2pwrite)
+ self.fromchild = os.fdopen(c2pread, 'r', bufsize)
+ if capturestderr:
+ os.close(errin)
+ self.childerr = os.fdopen(errout, 'r', bufsize)
+ else:
+ self.childerr = None
+
+ def __del__(self):
+ # In case the child hasn't been waited on, check if it's done.
+ self.poll(_deadstate=sys.maxint)
+ if self.sts < 0:
+ if _active is not None:
+ # Child is still running, keep us alive until we can wait on it.
+ _active.append(self)
+
+ def _run_child(self, cmd):
+ if isinstance(cmd, basestring):
+ cmd = ['/bin/sh', '-c', cmd]
+ os.closerange(3, MAXFD)
+ try:
+ os.execvp(cmd[0], cmd)
+ finally:
+ os._exit(1)
+
+ def poll(self, _deadstate=None):
+ """Return the exit status of the child process if it has finished,
+ or -1 if it hasn't finished yet."""
+ if self.sts < 0:
+ try:
+ pid, sts = os.waitpid(self.pid, os.WNOHANG)
+ # pid will be 0 if self.pid hasn't terminated
+ if pid == self.pid:
+ self.sts = sts
+ except os.error:
+ if _deadstate is not None:
+ self.sts = _deadstate
+ return self.sts
+
+ def wait(self):
+ """Wait for and return the exit status of the child process."""
+ if self.sts < 0:
+ pid, sts = os.waitpid(self.pid, 0)
+ # This used to be a test, but it is believed to be
+ # always true, so I changed it to an assertion - mvl
+ assert pid == self.pid
+ self.sts = sts
+ return self.sts
+
+
+class Popen4(Popen3):
+ childerr = None
+
+ def __init__(self, cmd, bufsize=-1):
+ _cleanup()
+ self.cmd = cmd
+ p2cread, p2cwrite = os.pipe()
+ c2pread, c2pwrite = os.pipe()
+ self.pid = os.fork()
+ if self.pid == 0:
+ # Child
+ os.dup2(p2cread, 0)
+ os.dup2(c2pwrite, 1)
+ os.dup2(c2pwrite, 2)
+ self._run_child(cmd)
+ os.close(p2cread)
+ self.tochild = os.fdopen(p2cwrite, 'w', bufsize)
+ os.close(c2pwrite)
+ self.fromchild = os.fdopen(c2pread, 'r', bufsize)
+
+
+if sys.platform[:3] == "win" or sys.platform == "os2emx":
+ # Some things don't make sense on non-Unix platforms.
+ del Popen3, Popen4
+
+ def popen2(cmd, bufsize=-1, mode='t'):
+ """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
+ be a sequence, in which case arguments will be passed directly to the
+ program without shell intervention (as with os.spawnv()). If 'cmd' is a
+ string it will be passed to the shell (as with os.system()). If
+ 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
+ file objects (child_stdout, child_stdin) are returned."""
+ w, r = os.popen2(cmd, mode, bufsize)
+ return r, w
+
+ def popen3(cmd, bufsize=-1, mode='t'):
+ """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
+ be a sequence, in which case arguments will be passed directly to the
+ program without shell intervention (as with os.spawnv()). If 'cmd' is a
+ string it will be passed to the shell (as with os.system()). If
+ 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
+ file objects (child_stdout, child_stdin, child_stderr) are returned."""
+ w, r, e = os.popen3(cmd, mode, bufsize)
+ return r, w, e
+
+ def popen4(cmd, bufsize=-1, mode='t'):
+ """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
+ be a sequence, in which case arguments will be passed directly to the
+ program without shell intervention (as with os.spawnv()). If 'cmd' is a
+ string it will be passed to the shell (as with os.system()). If
+ 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
+ file objects (child_stdout_stderr, child_stdin) are returned."""
+ w, r = os.popen4(cmd, mode, bufsize)
+ return r, w
+else:
+ def popen2(cmd, bufsize=-1, mode='t'):
+ """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
+ be a sequence, in which case arguments will be passed directly to the
+ program without shell intervention (as with os.spawnv()). If 'cmd' is a
+ string it will be passed to the shell (as with os.system()). If
+ 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
+ file objects (child_stdout, child_stdin) are returned."""
+ inst = Popen3(cmd, False, bufsize)
+ return inst.fromchild, inst.tochild
+
+ def popen3(cmd, bufsize=-1, mode='t'):
+ """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
+ be a sequence, in which case arguments will be passed directly to the
+ program without shell intervention (as with os.spawnv()). If 'cmd' is a
+ string it will be passed to the shell (as with os.system()). If
+ 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
+ file objects (child_stdout, child_stdin, child_stderr) are returned."""
+ inst = Popen3(cmd, True, bufsize)
+ return inst.fromchild, inst.tochild, inst.childerr
+
+ def popen4(cmd, bufsize=-1, mode='t'):
+ """Execute the shell command 'cmd' in a sub-process. On UNIX, 'cmd' may
+ be a sequence, in which case arguments will be passed directly to the
+ program without shell intervention (as with os.spawnv()). If 'cmd' is a
+ string it will be passed to the shell (as with os.system()). If
+ 'bufsize' is specified, it sets the buffer size for the I/O pipes. The
+ file objects (child_stdout_stderr, child_stdin) are returned."""
+ inst = Popen4(cmd, bufsize)
+ return inst.fromchild, inst.tochild
+
+ __all__.extend(["Popen3", "Popen4"])