//fork():
#include<unistd.h>
#include<stdio.h>
void main(){
pid_t pid;
int i=0;
//pid=vfork();
pid=fork();
if(pid<0)
printf("error");
else if(pid==0){
i++;
printf("i am the child process,id is %d my father is%d\n",getpid(),getppid());
printf("child say:i is %d\n",i);
exit(0);
}
else{
i++;
printf("i am the parent process,id is %d\n",getpid());
printf("parent say:i is %d\n",i);}
}
運行結果：
i am the parent process,id is 3247
parent say:i is 1
i am the child process,id is 3248 my father is3247
child say:i is 1
//vfork():
#include<unistd.h>
#include<stdio.h>
void main(){
pid_t pid,pit;
int i=0;
pid=vfork();
//pid=fork();
if(pid<0)
printf("error");
else if(pid==0){
i++;
printf("i am the child process,id is %d my father is%d\n",getpid(),getppid());
printf("child say:i is %d\n",i);
exit(0);
}
else{
i++;
printf("i am the parent process,id is %d\n",getpid());
printf("parent say:i is %d\n",i);}
}
運行結果：
i am the child process,id is 3337 my father is3336
child say:i is 1
i am the parent process,id is 3336
parent say:i is 2
