?? wait.c
字號:
#include <sys/types.h>#include <sys/wait.h>#include <unistd.h>#include <stdio.h>int main(){ pid_t pid; char *message; int n; int exit_code; printf("fork program starting\n"); pid = fork(); switch(pid) { case -1: exit(1); case 0: message = "This is the child"; n = 5; exit_code = 37; break; default: message = "This is the parent"; n = 3; exit_code = 0; break; } for(; n > 0; n--) { puts(message); sleep(1); }/* This section of the program waits for the child process to finish. */ if(pid) { int stat_val; pid_t child_pid; child_pid = wait(&stat_val); printf("Child has finished: PID = %d\n", child_pid); if(WIFEXITED(stat_val)) printf("Child exited with code %d\n", WEXITSTATUS(stat_val)); else printf("Child terminated abnormally\n"); } exit (exit_code);}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -