Personal Computer World 2009 February/PCWFEB09.iso/Software/Resources/Chat & Communication/Digsby build 37/digsby_setup.exe/lib/subprocess.pyo

Python Compiled Bytecode | 2008-10-13 | 17KB | 750 lines

# Source Generated with Decompyle++
# File: in.pyo (Python 2.5)

import sys
mswindows = sys.platform == 'win32'
import os
import types
import traceback
import gc

class CalledProcessError(Exception):

    def __init__(self, returncode, cmd):
        self.returncode = returncode
        self.cmd = cmd


    def __str__(self):
        return "Command '%s' returned non-zero exit status %d" % (self.cmd, self.returncode)


if mswindows:
    import threading
    import msvcrt
    from _subprocess import *

    class STARTUPINFO:
        dwFlags = 0
        hStdInput = None
        hStdOutput = None
        hStdError = None
        wShowWindow = 0


    class pywintypes:
        error = IOError

else:
    import select
    import errno
    import fcntl
    import pickle
__all__ = [
    'Popen',
    'PIPE',
    'STDOUT',
    'call',
    'check_call',
    'CalledProcessError']

try:
    MAXFD = os.sysconf('SC_OPEN_MAX')
except:
    MAXFD = 256


try:
    False
except NameError:
    False = 0
    True = 1

_active = []

def _cleanup():
    for inst in _active[:]:
        if inst._internal_poll(_deadstate = sys.maxint) >= 0:

            try:
                _active.remove(inst)
            except ValueError:
                pass
            except:
                None<EXCEPTION MATCH>ValueError


        None<EXCEPTION MATCH>ValueError


PIPE = -1
STDOUT = -2

def call(*popenargs, **kwargs):
    return Popen(*popenargs, **kwargs).wait()


def check_call(*popenargs, **kwargs):
    retcode = call(*popenargs, **kwargs)
    cmd = kwargs.get('args')
    if cmd is None:
        cmd = popenargs[0]

    if retcode:
        raise CalledProcessError(retcode, cmd)

    return retcode


def list2cmdline(seq):
    result = []
    needquote = False
    for arg in seq:
        bs_buf = []
        if result:
            result.append(' ')

        if not ' ' in arg and '\t' in arg:
            pass
        needquote = arg == ''
        if needquote:
            result.append('"')

        for c in arg:
            if c == '\\':
                bs_buf.append(c)
                continue
            if c == '"':
                result.append('\\' * len(bs_buf) * 2)
                bs_buf = []
                result.append('\\"')
                continue
            if bs_buf:
                result.extend(bs_buf)
                bs_buf = []

            result.append(c)

        if bs_buf:
            result.extend(bs_buf)

        if needquote:
            result.extend(bs_buf)
            result.append('"')
            continue

    return ''.join(result)


class Popen(object):

    def __init__(self, args, bufsize = 0, executable = None, stdin = None, stdout = None, stderr = None, preexec_fn = None, close_fds = False, shell = False, cwd = None, env = None, universal_newlines = False, startupinfo = None, creationflags = 0):
        _cleanup()
        self._child_created = False
        if not isinstance(bufsize, (int, long)):
            raise TypeError('bufsize must be an integer')

        if mswindows:
            if preexec_fn is not None:
                raise ValueError('preexec_fn is not supported on Windows platforms')

            if close_fds:
                raise ValueError('close_fds is not supported on Windows platforms')

        elif startupinfo is not None:
            raise ValueError('startupinfo is only supported on Windows platforms')

        if creationflags != 0:
            raise ValueError('creationflags is only supported on Windows platforms')

        self.stdin = None
        self.stdout = None
        self.stderr = None
        self.pid = None
        self.returncode = None
        self.universal_newlines = universal_newlines
        (p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite) = self._get_handles(stdin, stdout, stderr)
        self._execute_child(args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)
        if mswindows:
            if stdin is None and p2cwrite is not None:
                os.close(p2cwrite)
                p2cwrite = None

            if stdout is None and c2pread is not None:
                os.close(c2pread)
                c2pread = None

            if stderr is None and errread is not None:
                os.close(errread)
                errread = None


        if p2cwrite:
            self.stdin = os.fdopen(p2cwrite, 'wb', bufsize)

        if c2pread:
            if universal_newlines:
                self.stdout = os.fdopen(c2pread, 'rU', bufsize)
            else:
                self.stdout = os.fdopen(c2pread, 'rb', bufsize)

        if errread:
            if universal_newlines:
                self.stderr = os.fdopen(errread, 'rU', bufsize)
            else:
                self.stderr = os.fdopen(errread, 'rb', bufsize)



    def _translate_newlines(self, data):
        data = data.replace('\r\n', '\n')
        data = data.replace('\r', '\n')
        return data


    def __del__(self, sys = sys):
        if not self._child_created:
            return None

        self._internal_poll(_deadstate = sys.maxint)
        if self.returncode is None and _active is not None:
            _active.append(self)



    def communicate(self, input = None):
        if [
            self.stdin,
            self.stdout,
            self.stderr].count(None) >= 2:
            stdout = None
            stderr = None
            if self.stdin:
                if input:
                    self.stdin.write(input)

                self.stdin.close()
            elif self.stdout:
                stdout = self.stdout.read()
                self.stdout.close()
            elif self.stderr:
                stderr = self.stderr.read()
                self.stderr.close()

            self.wait()
            return (stdout, stderr)

        return self._communicate(input)


    def poll(self):
        return self._internal_poll()

    if mswindows:

        def _get_handles(self, stdin, stdout, stderr):
            if stdin is None and stdout is None and stderr is None:
                return (None, None, None, None, None, None)

            (p2cread, p2cwrite) = (None, None)
            (c2pread, c2pwrite) = (None, None)
            (errread, errwrite) = (None, None)
            if stdin is None:
                p2cread = GetStdHandle(STD_INPUT_HANDLE)

            if p2cread is not None:
                pass
            elif stdin is None or stdin == PIPE:
                (p2cread, p2cwrite) = CreatePipe(None, 0)
                p2cwrite = p2cwrite.Detach()
                p2cwrite = msvcrt.open_osfhandle(p2cwrite, 0)
            elif isinstance(stdin, int):
                p2cread = msvcrt.get_osfhandle(stdin)
            else:
                p2cread = msvcrt.get_osfhandle(stdin.fileno())
            p2cread = self._make_inheritable(p2cread)
            if stdout is None:
                c2pwrite = GetStdHandle(STD_OUTPUT_HANDLE)

            if c2pwrite is not None:
                pass
            elif stdout is None or stdout == PIPE:
                (c2pread, c2pwrite) = CreatePipe(None, 0)
                c2pread = c2pread.Detach()
                c2pread = msvcrt.open_osfhandle(c2pread, 0)
            elif isinstance(stdout, int):
                c2pwrite = msvcrt.get_osfhandle(stdout)
            else:
                c2pwrite = msvcrt.get_osfhandle(stdout.fileno())
            c2pwrite = self._make_inheritable(c2pwrite)
            if stderr is None:
                errwrite = GetStdHandle(STD_ERROR_HANDLE)

            if errwrite is not None:
                pass
            elif stderr is None or stderr == PIPE:
                (errread, errwrite) = CreatePipe(None, 0)
                errread = errread.Detach()
                errread = msvcrt.open_osfhandle(errread, 0)
            elif stderr == STDOUT:
                errwrite = c2pwrite
            elif isinstance(stderr, int):
                errwrite = msvcrt.get_osfhandle(stderr)
            else:
                errwrite = msvcrt.get_osfhandle(stderr.fileno())
            errwrite = self._make_inheritable(errwrite)
            return (p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)


        def _make_inheritable(self, handle):
            return DuplicateHandle(GetCurrentProcess(), handle, GetCurrentProcess(), 0, 1, DUPLICATE_SAME_ACCESS)


        def _find_w9xpopen(self):
            w9xpopen = os.path.join(os.path.dirname(GetModuleFileName(0)), 'w9xpopen.exe')
            if not os.path.exists(w9xpopen):
                w9xpopen = os.path.join(os.path.dirname(sys.exec_prefix), 'w9xpopen.exe')
                if not os.path.exists(w9xpopen):
                    raise RuntimeError('Cannot locate w9xpopen.exe, which is needed for Popen to work with your shell or platform.')


            return w9xpopen


        def _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite):
            if not isinstance(args, types.StringTypes):
                args = list2cmdline(args)

            if startupinfo is None:
                startupinfo = STARTUPINFO()

            if None not in (p2cread, c2pwrite, errwrite):
                startupinfo.dwFlags |= STARTF_USESTDHANDLES
                startupinfo.hStdInput = p2cread
                startupinfo.hStdOutput = c2pwrite
                startupinfo.hStdError = errwrite

            if shell:
                startupinfo.dwFlags |= STARTF_USESHOWWINDOW
                startupinfo.wShowWindow = SW_HIDE
                comspec = os.environ.get('COMSPEC', 'cmd.exe')
                args = comspec + ' /c ' + args
                if GetVersion() >= 0x80000000L or os.path.basename(comspec).lower() == 'command.com':
                    w9xpopen = self._find_w9xpopen()
                    args = '"%s" %s' % (w9xpopen, args)
                    creationflags |= CREATE_NEW_CONSOLE



            try:
                (hp, ht, pid, tid) = CreateProcess(executable, args, None, None, 1, creationflags, env, cwd, startupinfo)
            except pywintypes.error:
                e = None
                raise WindowsError(*e.args)

            self._child_created = True
            self._handle = hp
            self.pid = pid
            ht.Close()
            if p2cread is not None:
                p2cread.Close()

            if c2pwrite is not None:
                c2pwrite.Close()

            if errwrite is not None:
                errwrite.Close()



        def _internal_poll(self, _deadstate = None):
            if self.returncode is None:
                if WaitForSingleObject(self._handle, 0) == WAIT_OBJECT_0:
                    self.returncode = GetExitCodeProcess(self._handle)


            return self.returncode


        def wait(self):
            if self.returncode is None:
                obj = WaitForSingleObject(self._handle, INFINITE)
                self.returncode = GetExitCodeProcess(self._handle)

            return self.returncode


        def _readerthread(self, fh, buffer):
            buffer.append(fh.read())


        def _communicate(self, input):
            stdout = None
            stderr = None
            if self.stdout:
                stdout = []
                stdout_thread = threading.Thread(target = self._readerthread, args = (self.stdout, stdout))
                stdout_thread.setDaemon(True)
                stdout_thread.start()

            if self.stderr:
                stderr = []
                stderr_thread = threading.Thread(target = self._readerthread, args = (self.stderr, stderr))
                stderr_thread.setDaemon(True)
                stderr_thread.start()

            if self.stdin:
                if input is not None:
                    self.stdin.write(input)

                self.stdin.close()

            if self.stdout:
                stdout_thread.join()

            if self.stderr:
                stderr_thread.join()

            if stdout is not None:
                stdout = stdout[0]

            if stderr is not None:
                stderr = stderr[0]

            if self.universal_newlines and hasattr(file, 'newlines'):
                if stdout:
                    stdout = self._translate_newlines(stdout)

                if stderr:
                    stderr = self._translate_newlines(stderr)


            self.wait()
            return (stdout, stderr)

    else:

        def _get_handles(self, stdin, stdout, stderr):
            (p2cread, p2cwrite) = (None, None)
            (c2pread, c2pwrite) = (None, None)
            (errread, errwrite) = (None, None)
            if stdin is None:
                pass
            elif stdin == PIPE:
                (p2cread, p2cwrite) = os.pipe()
            elif isinstance(stdin, int):
                p2cread = stdin
            else:
                p2cread = stdin.fileno()
            if stdout is None:
                pass
            elif stdout == PIPE:
                (c2pread, c2pwrite) = os.pipe()
            elif isinstance(stdout, int):
                c2pwrite = stdout
            else:
                c2pwrite = stdout.fileno()
            if stderr is None:
                pass
            elif stderr == PIPE:
                (errread, errwrite) = os.pipe()
            elif stderr == STDOUT:
                errwrite = c2pwrite
            elif isinstance(stderr, int):
                errwrite = stderr
            else:
                errwrite = stderr.fileno()
            return (p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite)


        def _set_cloexec_flag(self, fd):

            try:
                cloexec_flag = fcntl.FD_CLOEXEC
            except AttributeError:
                cloexec_flag = 1

            old = fcntl.fcntl(fd, fcntl.F_GETFD)
            fcntl.fcntl(fd, fcntl.F_SETFD, old | cloexec_flag)


        def _close_fds(self, but):
            for i in xrange(3, MAXFD):
                if i == but:
                    continue


                try:
                    os.close(i)
                continue
                continue




        def _execute_child(self, args, executable, preexec_fn, close_fds, cwd, env, universal_newlines, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite):
            if isinstance(args, types.StringTypes):
                args = [
                    args]
            else:
                args = list(args)
            if shell:
                args = [
                    '/bin/sh',
                    '-c'] + args

            if executable is None:
                executable = args[0]

            (errpipe_read, errpipe_write) = os.pipe()
            self._set_cloexec_flag(errpipe_write)
            gc_was_enabled = gc.isenabled()
            gc.disable()

            try:
                self.pid = os.fork()
            except:
                if gc_was_enabled:
                    gc.enable()

                raise

            self._child_created = True
            if self.pid == 0:

                try:
                    if p2cwrite:
                        os.close(p2cwrite)

                    if c2pread:
                        os.close(c2pread)

                    if errread:
                        os.close(errread)

                    os.close(errpipe_read)
                    if p2cread:
                        os.dup2(p2cread, 0)

                    if c2pwrite:
                        os.dup2(c2pwrite, 1)

                    if errwrite:
                        os.dup2(errwrite, 2)

                    if p2cread and p2cread not in (0,):
                        os.close(p2cread)

                    if c2pwrite and c2pwrite not in (p2cread, 1):
                        os.close(c2pwrite)

                    if errwrite and errwrite not in (p2cread, c2pwrite, 2):
                        os.close(errwrite)

                    if close_fds:
                        self._close_fds(but = errpipe_write)

                    if cwd is not None:
                        os.chdir(cwd)

                    if preexec_fn:
                        apply(preexec_fn)

                    if env is None:
                        os.execvp(executable, args)
                    else:
                        os.execvpe(executable, args, env)
                except:
                    (exc_type, exc_value, tb) = sys.exc_info()
                    exc_lines = traceback.format_exception(exc_type, exc_value, tb)
                    exc_value.child_traceback = ''.join(exc_lines)
                    os.write(errpipe_write, pickle.dumps(exc_value))

                os._exit(255)

            if gc_was_enabled:
                gc.enable()

            os.close(errpipe_write)
            if p2cread and p2cwrite:
                os.close(p2cread)

            if c2pwrite and c2pread:
                os.close(c2pwrite)

            if errwrite and errread:
                os.close(errwrite)

            data = os.read(errpipe_read, 1048576)
            os.close(errpipe_read)
            if data != '':
                os.waitpid(self.pid, 0)
                child_exception = pickle.loads(data)
                raise child_exception



        def _handle_exitstatus(self, sts):
            if os.WIFSIGNALED(sts):
                self.returncode = -os.WTERMSIG(sts)
            elif os.WIFEXITED(sts):
                self.returncode = os.WEXITSTATUS(sts)
            else:
                raise RuntimeError('Unknown child exit status!')


        def _internal_poll(self, _deadstate = None):
            if self.returncode is None:

                try:
                    (pid, sts) = os.waitpid(self.pid, os.WNOHANG)
                    if pid == self.pid:
                        self._handle_exitstatus(sts)
                except os.error:
                    if _deadstate is not None:
                        self.returncode = _deadstate

                except:
                    _deadstate is not None


            None<EXCEPTION MATCH>os.error
            return self.returncode


        def wait(self):
            if self.returncode is None:
                (pid, sts) = os.waitpid(self.pid, 0)
                self._handle_exitstatus(sts)

            return self.returncode


        def _communicate(self, input):
            read_set = []
            write_set = []
            stdout = None
            stderr = None
            if self.stdin:
                self.stdin.flush()
                if input:
                    write_set.append(self.stdin)
                else:
                    self.stdin.close()

            if self.stdout:
                read_set.append(self.stdout)
                stdout = []

            if self.stderr:
                read_set.append(self.stderr)
                stderr = []

            input_offset = 0
            while read_set or write_set:

                try:
                    (rlist, wlist, xlist) = select.select(read_set, write_set, [])
                except select.error:
                    e = None
                    if e.args[0] == errno.EINTR:
                        continue

                    raise

                if self.stdin in wlist:
                    bytes_written = os.write(self.stdin.fileno(), buffer(input, input_offset, 512))
                    input_offset += bytes_written
                    if input_offset >= len(input):
                        self.stdin.close()
                        write_set.remove(self.stdin)


                if self.stdout in rlist:
                    data = os.read(self.stdout.fileno(), 1024)
                    if data == '':
                        self.stdout.close()
                        read_set.remove(self.stdout)

                    stdout.append(data)

                if self.stderr in rlist:
                    data = os.read(self.stderr.fileno(), 1024)
                    if data == '':
                        self.stderr.close()
                        read_set.remove(self.stderr)

                    stderr.append(data)
                    continue
            if stdout is not None:
                stdout = ''.join(stdout)

            if stderr is not None:
                stderr = ''.join(stderr)

            if self.universal_newlines and hasattr(file, 'newlines'):
                if stdout:
                    stdout = self._translate_newlines(stdout)

                if stderr:
                    stderr = self._translate_newlines(stderr)


            self.wait()
            return (stdout, stderr)



def _demo_posix():
    plist = Popen([
        'ps'], stdout = PIPE).communicate()[0]
    print 'Process list:'
    print plist
    if os.getuid() == 0:
        p = Popen([
            'id'], preexec_fn = (lambda : os.setuid(100)))
        p.wait()

    print "Looking for 'hda'..."
    p1 = Popen([
        'dmesg'], stdout = PIPE)
    p2 = Popen([
        'grep',
        'hda'], stdin = p1.stdout, stdout = PIPE)
    print repr(p2.communicate()[0])
    print
    print 'Trying a weird file...'

    try:
        print Popen([
            '/this/path/does/not/exist']).communicate()
    except OSError:
        e = None
        if e.errno == errno.ENOENT:
            print "The file didn't exist.  I thought so..."
            print 'Child traceback:'
            print e.child_traceback
        else:
            print 'Error', e.errno
    except:
        e.errno == errno.ENOENT

    print >>sys.stderr, 'Gosh.  No error.'


def _demo_windows():
    print "Looking for 'PROMPT' in set output..."
    p1 = Popen('set', stdout = PIPE, shell = True)
    p2 = Popen('find "PROMPT"', stdin = p1.stdout, stdout = PIPE)
    print repr(p2.communicate()[0])
    print 'Executing calc...'
    p = Popen('calc')
    p.wait()

if __name__ == '__main__':
    if mswindows:
        _demo_windows()
    else:
        _demo_posix()