Linux - 进程控制 代码(C)

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进程控制 代码(C)


本文地址:http://blog.csdn.net/caroline_wendy


输出进程IDgetpid().

代码:

/*By C.L.Wang * Eclipse CDT * Ubuntu 12.04 * 2014.10.5*/#include "apue.h"#include "error.h"int main(void) {printf("hello world from process ID %ld\n", (long)getpid());exit(0);}

输出:

hello world from process ID 2260


执行命令程序, fork()创建进程,execlp()执行命令,父进程等待子进程终止waitpid()

代码:

/*By C.L.Wang * Eclipse CDT * Ubuntu 12.04 * 2014.10.5*/#include "apue.h"#include "error.h"#include <sys/wait.h>int main(void) {char buf[MAXLINE];pid_t pid;int status;printf("%% ");while (fgets(buf, MAXLINE, stdin) != NULL) {if (buf[strlen(buf) - 1] == '\n') {buf[strlen(buf) - 1] = 0;}if ((pid = fork()) < 0) {err_sys("fork error");} else if (pid == 0) {execlp(buf, buf, (char*) 0);err_ret("couldn't execute: %s", buf);exit(127);}if ((pid = waitpid(pid, &status, 0)) < 0)err_sys("waitpid error");printf("%% ");}exit(0);}


输出:





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