vfork函数的使用【学习笔记】

 1 #include "apue.h"
 2 
 3 int globvar = 6;
 4 
 5 int main(void)
 6 {
 7     int var;
 8     pid_t pid;
 9 
10     var = 88;
11     printf("before vfork
");
12     if((pid = vfork()) < 0){
13         err_sys("vfork error");
14     }else if(pid == 0){
15         globvar++;
16         var++;
17         _exit(0);
18     }
19 
20     printf("pid = %ld,glob = %d,var = %d
",(long)getpid(),globvar,var);
21 
22     exit(0);
23 }