--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/eggs/py-1.4.0-py2.6.egg/py/_process/forkedfunc.py	Sat Jan 08 11:20:57 2011 +0530
@@ -0,0 +1,108 @@
+
+"""
+    ForkedFunc provides a way to run a function in a forked process
+    and get at its return value, stdout and stderr output as well
+    as signals and exitstatusus.
+
+    XXX see if tempdir handling is sane
+"""
+
+import py
+import os
+import sys
+import marshal
+
+class ForkedFunc(object):
+    EXITSTATUS_EXCEPTION = 3
+    def __init__(self, fun, args=None, kwargs=None, nice_level=0):
+        if args is None:
+            args = []
+        if kwargs is None:
+            kwargs = {}
+        self.fun = fun
+        self.args = args
+        self.kwargs = kwargs
+        self.tempdir = tempdir = py.path.local.mkdtemp()
+        self.RETVAL = tempdir.ensure('retval')
+        self.STDOUT = tempdir.ensure('stdout')
+        self.STDERR = tempdir.ensure('stderr')
+
+        pid = os.fork()
+        if pid: # in parent process
+            self.pid = pid
+        else: # in child process
+            self._child(nice_level)
+
+    def _child(self, nice_level):
+        # right now we need to call a function, but first we need to
+        # map all IO that might happen
+        # make sure sys.stdout points to file descriptor one
+        sys.stdout = stdout = self.STDOUT.open('w')
+        sys.stdout.flush()
+        fdstdout = stdout.fileno()
+        if fdstdout != 1:
+            os.dup2(fdstdout, 1)
+        sys.stderr = stderr = self.STDERR.open('w')
+        fdstderr = stderr.fileno()
+        if fdstderr != 2:
+            os.dup2(fdstderr, 2)
+        retvalf = self.RETVAL.open("wb")
+        EXITSTATUS = 0
+        try:
+            if nice_level:
+                os.nice(nice_level)
+            try:
+                retval = self.fun(*self.args, **self.kwargs)
+                retvalf.write(marshal.dumps(retval))
+            except:
+                excinfo = py.code.ExceptionInfo()
+                stderr.write(excinfo.exconly())
+                EXITSTATUS = self.EXITSTATUS_EXCEPTION
+        finally:
+            stdout.close()
+            stderr.close()
+            retvalf.close()
+        os.close(1)
+        os.close(2)
+        os._exit(EXITSTATUS)
+
+    def waitfinish(self, waiter=os.waitpid):
+        pid, systemstatus = waiter(self.pid, 0)
+        if systemstatus:
+            if os.WIFSIGNALED(systemstatus):
+                exitstatus = os.WTERMSIG(systemstatus) + 128
+            else:
+                exitstatus = os.WEXITSTATUS(systemstatus)
+            #raise ExecutionFailed(status, systemstatus, cmd,
+            #                      ''.join(out), ''.join(err))
+        else:
+            exitstatus = 0
+        signal = systemstatus & 0x7f
+        if not exitstatus and not signal:
+            retval = self.RETVAL.open('rb')
+            try:
+                retval_data = retval.read()
+            finally:
+                retval.close()
+            retval = marshal.loads(retval_data)
+        else:
+            retval = None
+        stdout = self.STDOUT.read()
+        stderr = self.STDERR.read()
+        self._removetemp()
+        return Result(exitstatus, signal, retval, stdout, stderr)
+
+    def _removetemp(self):
+        if self.tempdir.check():
+            self.tempdir.remove()
+
+    def __del__(self):
+        self._removetemp()
+
+class Result(object):
+    def __init__(self, exitstatus, signal, retval, stdout, stderr):
+        self.exitstatus = exitstatus
+        self.signal = signal
+        self.retval = retval
+        self.out = stdout
+        self.err = stderr