Python os 模块，spawnle() 实例源码

def patch_new_process_functions_with_warning():
    monkey_patch_os('execl', create_warn_multiproc)
    monkey_patch_os('execle', create_warn_multiproc)
    monkey_patch_os('execlp', create_warn_multiproc)
    monkey_patch_os('execlpe', create_warn_multiproc)
    monkey_patch_os('execv', create_warn_multiproc)
    monkey_patch_os('execve', create_warn_multiproc)
    monkey_patch_os('execvp', create_warn_multiproc)
    monkey_patch_os('execvpe', create_warn_multiproc)
    monkey_patch_os('spawnl', create_warn_multiproc)
    monkey_patch_os('spawnle', create_warn_multiproc)
    monkey_patch_os('spawnlp', create_warn_multiproc)
    monkey_patch_os('spawnlpe', create_warn_multiproc)
    monkey_patch_os('spawnv', create_warn_multiproc)
    monkey_patch_os('spawnve', create_warn_multiproc)
    monkey_patch_os('spawnvp', create_warn_multiproc)
    monkey_patch_os('spawnvpe', create_warn_multiproc)

    if sys.platform != 'win32':
        monkey_patch_os('fork', create_warn_multiproc)
        try:
            import _posixsubprocess
            monkey_patch_module(_posixsubprocess, 'fork_exec', create_warn_fork_exec)
        except ImportError:
            pass
    else:
        # Windows
        try:
            import _subprocess
        except ImportError:
            import _winapi as _subprocess
        monkey_patch_module(_subprocess, 'CreateProcess', create_CreateProcessWarnMultiproc)

def patch_new_process_functions():
    # os.execl(path, arg0, arg1, ...)
    # os.execle(path, arg0, arg1, ..., env)
    # os.execlp(file, arg0, arg1, ...)
    # os.execlpe(file, arg0, arg1, ..., env)
    # os.execv(path, args)
    # os.execve(path, args, env)
    # os.execvp(file, args)
    # os.execvpe(file, args, env)
    monkey_patch_os('execl', create_execl)
    monkey_patch_os('execle', create_execl)
    monkey_patch_os('execlp', create_execl)
    monkey_patch_os('execlpe', create_execl)
    monkey_patch_os('execv', create_execv)
    monkey_patch_os('execve', create_execve)
    monkey_patch_os('execvp', create_execv)
    monkey_patch_os('execvpe', create_execve)

    # os.spawnl(mode, path, ...)
    # os.spawnle(mode, path, ..., env)
    # os.spawnlp(mode, file, ...)
    # os.spawnlpe(mode, file, ..., env)
    # os.spawnv(mode, path, args)
    # os.spawnve(mode, path, args, env)
    # os.spawnvp(mode, file, args)
    # os.spawnvpe(mode, file, args, env)

    monkey_patch_os('spawnl', create_spawnl)
    monkey_patch_os('spawnle', create_spawnl)
    monkey_patch_os('spawnlp', create_spawnl)
    monkey_patch_os('spawnlpe', create_spawnl)
    monkey_patch_os('spawnv', create_spawnv)
    monkey_patch_os('spawnve', create_spawnve)
    monkey_patch_os('spawnvp', create_spawnv)
    monkey_patch_os('spawnvpe', create_spawnve)

    if sys.platform != 'win32':
        monkey_patch_os('fork', create_fork)
        try:
            import _posixsubprocess
            monkey_patch_module(_posixsubprocess, 'fork_exec', create_fork_exec)
        except ImportError:
            pass
    else:
        # Windows
        try:
            import _subprocess
        except ImportError:
            import _winapi as _subprocess
        monkey_patch_module(_subprocess, 'CreateProcess', create_CreateProcess)

def run(self):
        """
        Call this function at the end of your class's `__init__` function.
        """
        stderr = os.path.abspath(os.path.join(self.outdir, self.name + '.log'))

        if self.pipe:
            self.args += ('|', self.pipe, '2>>'+stderr)

        if self.gzip:
            self.args += ('|', 'gzip', '1>', self.gzip)
        else:
            self.args.append('2>>'+stderr)
            self.args.append('1>>'+stderr)

        # Print timestamp to log

        log = open(stderr, 'a')
        log.write("[gloTK] timestamp={}\n".format(utils.timestamp()))

        cmd = ' '.join(map(str, self.args))
        print(cmd)
        log.write(cmd)

        start = time.time()
        save_cwd = os.getcwd()
        try:
            utils.safe_mkdir(self.outdir)
            os.chdir(self.outdir)
            spawn_pid = os.spawnle(os.P_NOWAIT, self.shell, self.shell, '-c', cmd, self.env)
            wait_pid, retcode, rusage = os.wait4(spawn_pid, 0)
            if wait_pid != spawn_pid:
                utils.die("could not wait for process %d: got %d" % (spawn_pid, wait_pid))
            os.chdir(save_cwd)
        except OSError as e:
            utils.info(e)
            utils.die("could not run wrapper for command:\n%s" % cmd)

        elapsed = time.time() - start
        retcode = os.WEXITSTATUS(retcode)

        if (self.return_ok is not None) and (self.return_ok != retcode):
            # Give some context to the non-zero return.
            if os.path.isfile(stderr):
                subprocess.call(['tail', '-3', stderr])
            utils.die("non-zero return (%d) from command:\n%s" % (retcode, cmd))
        log.close()