我们从Python开源项目中，提取了以下50个代码示例，用于说明如何使用os.spawnv()。
def _spawn_os2(cmd, search_path=1, verbose=0, dry_run=0): executable = cmd[0] if search_path: # either we find one or it stays the same executable = find_executable(executable) or executable log.info(' '.join([executable] + cmd[1:])) if not dry_run: # spawnv for OS/2 EMX requires a full path to the .exe try: rc = os.spawnv(os.P_WAIT, executable, cmd) except OSError, exc: # this seems to happen when the command isn't found raise DistutilsExecError, \ "command '%s' failed: %s" % (cmd[0], exc[-1]) if rc != 0: # and this reflects the command running but failing log.debug("command '%s' failed with exit status %d" % (cmd[0], rc)) raise DistutilsExecError, \ "command '%s' failed with exit status %d" % (cmd[0], rc)
def popen2(cmd, mode="t", bufsize=-1): """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_stdin, child_stdout) are returned.""" import warnings msg = "os.popen2 is deprecated. Use the subprocess module." warnings.warn(msg, DeprecationWarning, stacklevel=2) import subprocess PIPE = subprocess.PIPE p = subprocess.Popen(cmd, shell=isinstance(cmd, basestring), bufsize=bufsize, stdin=PIPE, stdout=PIPE, close_fds=True) return p.stdin, p.stdout
def popen3(cmd, mode="t", bufsize=-1): """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_stdin, child_stdout, child_stderr) are returned.""" import warnings msg = "os.popen3 is deprecated. Use the subprocess module." warnings.warn(msg, DeprecationWarning, stacklevel=2) import subprocess PIPE = subprocess.PIPE p = subprocess.Popen(cmd, shell=isinstance(cmd, basestring), bufsize=bufsize, stdin=PIPE, stdout=PIPE, stderr=PIPE, close_fds=True) return p.stdin, p.stdout, p.stderr
def popen4(cmd, mode="t", bufsize=-1): """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_stdin, child_stdout_stderr) are returned.""" import warnings msg = "os.popen4 is deprecated. Use the subprocess module." warnings.warn(msg, DeprecationWarning, stacklevel=2) import subprocess PIPE = subprocess.PIPE p = subprocess.Popen(cmd, shell=isinstance(cmd, basestring), bufsize=bufsize, stdin=PIPE, stdout=PIPE, stderr=subprocess.STDOUT, close_fds=True) return p.stdin, p.stdout
def strip_files(files, argv_max=(256 * 1024)): """ Strip a list of files """ tostrip = [(fn, flipwritable(fn)) for fn in files] while tostrip: cmd = list(STRIPCMD) flips = [] pathlen = sum([len(s) + 1 for s in cmd]) while pathlen < argv_max: if not tostrip: break added, flip = tostrip.pop() pathlen += len(added) + 1 cmd.append(added) flips.append((added, flip)) else: cmd.pop() tostrip.append(flips.pop()) os.spawnv(os.P_WAIT, cmd[0], cmd) for args in flips: flipwritable(*args)
def _spawn_os2(cmd, search_path=1, verbose=0, dry_run=0): executable = cmd[0] if search_path: # either we find one or it stays the same executable = find_executable(executable) or executable log.info(' '.join([executable] + cmd[1:])) if not dry_run: # spawnv for OS/2 EMX requires a full path to the .exe try: rc = os.spawnv(os.P_WAIT, executable, cmd) except OSError, exc: # this seems to happen when the command isn't found if not DEBUG: cmd = executable raise DistutilsExecError, \ "command %r failed: %s" % (cmd, exc[-1]) if rc != 0: # and this reflects the command running but failing if not DEBUG: cmd = executable log.debug("command %r failed with exit status %d" % (cmd, rc)) raise DistutilsExecError, \ "command %r failed with exit status %d" % (cmd, rc)
def strip_files(files, argv_max=(256 * 1024)): """ Strip a list of files """ tostrip = [(fn, flipwritable(fn)) for fn in files if os.path.exists(fn)] while tostrip: cmd = list(STRIPCMD) flips = [] pathlen = reduce(operator.add, [len(s) + 1 for s in cmd]) while pathlen < argv_max: if not tostrip: break added, flip = tostrip.pop() pathlen += len(added) + 1 cmd.append(added) flips.append((added, flip)) else: cmd.pop() tostrip.append(flips.pop()) os.spawnv(os.P_WAIT, cmd[0], cmd) for args in flips: flipwritable(*args)
