只需检查 c 中的状态进程 [英] Just check status process in c

问题描述

我想知道进程的状态.我想我可以使用等待系列功能，但实际上我不想等待过程，只需检查状态并继续.

I want to know the status of a process. I think I can use the wait family functions but actually I don't want to wait for the process, just check the status and go on.

我想要类似的东西

checkStatusOfProcess(&status);
if(status == WORKING) {
    //do something
} else if(status == exited) {
    //do something else
} else \I dont care about other states

推荐答案

然后你想使用带有 WNOHANG 选项的 waitpid 函数:

Then you want to use the waitpid function with the WNOHANG option:

#include <sys/types.h>
#include <sys/wait.h>

int status;
pid_t return_pid = waitpid(process_id, &status, WNOHANG); /* WNOHANG def'd in wait.h */
if (return_pid == -1) {
    /* error */
} else if (return_pid == 0) {
    /* child is still running */
} else if (return_pid == process_id) {
    /* child is finished. exit status in   status */
}

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