只需检查c中的状态进程

发布于 2024-10-03 08:38:00 字数 269 浏览 3 评论 0原文

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该过程，只需检查状态并继续。

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

原文

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.

I would want something like

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

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原野 2024-10-10 08:38:00

然后您希望将 waitpid 函数与 WNOHANG 选项一起使用：

#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 */
}

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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