Linux C 擷取進程的退出值

如以下代碼所示:

/***************************************************************************** *  Copyright          :  All Rights Reserved. * *  Date               :  2013-03-14 15:11:48 *  Author/Corporation :  Dengzhaoqun *  Email              :  dengzhaoqun@163.com *****************************************************************************/#include <stdio.h>#include <stdlib.h>#include <string.h>#include <sys/types.h>#include <sys/wait.h>#include <unistd.h>#include <errno.h>int main(int argc, char *argv[]){pid_t pid;int stat;int exit_code;pid = fork();if(pid == 0){sleep(3);exit(5);}else if( pid < 0 ){fprintf(stderr, "fork failed: %s", strerror(errno));return -1;}wait(&stat);// 等待一個子進程結束if(WIFEXITED(stat))// 如果子進程通過 return, exit, _exit 正常結束, WIFEXITED() 返回 true{exit_code = WEXITSTATUS(stat);printf("child's exit_code: %d\n", exit_code);}return 0;}

參考:  "man 2 wait"