linux wait 等待进程状态改变，这里的状态包含哪些？

井蛙夏虫

回复 1# socay2
文档继续向下看

   

井蛙夏虫

回复 3# socay2
http://pubs.opengroup.org/online ... functions/wait.html

   

井蛙夏虫

回复 5# socay2
这个是posix标准文档。
我的系统上的man文档是有说的，不知道为什么你系统的没有。

1. The wait() system call suspends execution of the calling process until one of its children terminates.  The call wait(&status) is equivalent to:
   
2. 
   
3.            waitpid(-1, &status, 0);

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wait只能是子进程终止。如果要子进程继续和暂停都可以，要用waitpid

1. The  waitpid()  system  call  suspends  execution  of the calling process until a child specified by pid argument has changed state.  By default, waitpid() waits only for terminated children, but this
   
2.        behavior is modifiable via the options argument, as described below.

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1. The value of options is an OR of zero or more of the following constants:
   
2. 
   
3.        WNOHANG     return immediately if no child has exited.
   
4. 
   
5.        WUNTRACED   also return if a child has stopped (but not traced via ptrace(2)).  Status for traced children which have stopped is provided even if this option is not specified.
   
6. 
   
7.        WCONTINUED (since Linux 2.6.10)
   
8.                    also return if a stopped child has been resumed by delivery of SIGCONT.
   

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