subprocess.call()的返回值是多少? [英] What is the return value of subprocess.call()?

问题描述

我不确定subprocess.call()的返回值是什么意思.

I am not sure what the return value of subprocess.call() means.

• 我可以安全地假设一个零值将始终意味着该命令成功执行了吗?

• Can I safely assume a zero value will always mean that the command executed successfully?

返回值等于shell命令的退出状态吗?

Is the return value equivalent to the exit staus of a shell command?

例如，下面的代码几乎可以在Linux上的任何命令上正常工作吗?

For example, will the following piece of code work for virtually any command on Linux?

 cmd = "foo.txt > bar.txt"
 ret = subprocess.call(cmd, shell=True)
 if ret != 0:
     if ret < 0:
         print "Killed by signal", -ret
     else:
         print "Command failed with return code", ret
 else:
     print "SUCCESS!!"

请赐教我:-)

推荐答案

是的，Subprocess.call返回实际过程返回代码".

Yes, Subprocess.call returns "actual process return code".

您可以查看 Subprocess.call 和 Subprocess.Popen.returncode

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