exit(0)和_exit(0)有什么区别呢？__exit_the_process_status_and_

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exit(0)和_exit(0)有什么区别呢？

来源: 互联网发布时间：2015-02-19

本文导语: 对程序运行有什么影响呢？ | _exit是系统调用 exit是c库函数 _exit - terminate the current process SYNOPSIS #include void _exit(int status); DESCRIPTION _exit termin...

对程序运行有什么影响呢？

_exit是系统调用
exit是c库函数

       _exit - terminate the current process

SYNOPSIS
       #include

       void _exit(int status);

DESCRIPTION
       _exit terminates the calling process immediately. Any open file descriptors belong?
       ing to the process are closed; any children of the process are inherited by process
       1, init, and the process's parent is sent a SIGCHLD signal.

       status  is  returned to the parent process as the process's exit status, and can be
       collected using one of the wait family of calls.

RETURN VALUE
       _exit never returns.

===================================================
       exit - cause normal program termination

SYNOPSIS
       #include

       void exit(int status);

DESCRIPTION
       The  exit()  function  causes normal program termination and the value of status is
       returned to the parent.  All functions registered with atexit() and  on_exit()  are
       called in the reverse order of their registration, and all open streams are flushed
       and closed.

RETURN VALUE
       The exit() function does not return.

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