1 /*
2 ============================================================================
3 Name : test.c
4 Author : blank
5 Version :
6 Copyright : Your copyright notice
7 Description : 程序清单 8-8 exec函数实例，a.out是程序8-9产生的可执行程序============================================================================
8 */
9
10 #include "ourhdr.h"
11 #include <sys/wait.h>
12
13 char *evn_init[] = { "USER=unknown", "PATH=/tmp", NULL};
14 int main(int argc, char *argv[])
15 {
16 pid_t pid;
17
18 if ((pid = fork()) < 0){
19 err_sys("fork error");
20 }else if (pid == 0){
21 // specify pathname, specify environment
22 if (execle("/home/blank/workspace/test/src/a.out", "a.out", "myarg1",
23 "MY ARG2", (char *)0, evn_init) < 0){
24 err_sys("execel error");
25 }
26 }
27
28 if (waitpid(pid, NULL, 0) < 0){
29 err_sys("waitpid error");
30 }
31
32 if ((pid = fork()) < 0){
33 err_sys("fork error");
34 }else if (pid == 0){
35 // specify filename, inherit environment
36 if (execlp("./a.out", "a.out", "only 1 arg", (char *)0) < 0){
37 err_sys("execlp error");
38 }
39 }
40
41 exit(0);
42 }
