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fork3_2.c
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fork3_2.c
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#include "stdio.h"
#include "sys/types.h"
#include "unistd.h"
#include "stdlib.h"
#define HASPRO -10
int main()
{
pid_t p1,p2,p3,p4,p5;
int cnt=0;
while((p1=fork()) == -1);
//printf("Node p1 pid %d, it's parent pid %d.\n",getpid(),getppid());
if(!p1)
{
while((p2=fork()) == -1);
if(!p2)
{
while ((p4=fork())==-1);
if (!p4)
{
while(1)
{
printf("Node p4 pid %d, it's parent pid %d.\n",getpid(),getppid());
sleep(10);
//wait(0);
//return 0;
}
}
else
{
while ((p5=fork())==-1);
if (!p5)
{
while(1)
{
printf("Node p5 pid %d, it's parent pid %d.\n",getpid(),getppid());
sleep(10);
//wait(0);
//return 0;
}
}
}
while(1)
{
printf("Node p2 pid %d, it's parent pid %d.\n",getpid(),getppid());
sleep(10);
printf("P2通过exit()自己正常退出\n");
exit(0);
//wait(0);
//return 0;
}
}
else
{
while ((p3=fork())==-1);
if (!p3)
{
while(1)
{
printf("Node p3 pid %d, it's parent pid %d.\n",getpid(),getppid());
sleep(10);
//wait(0);
//return 0;
}
}
}
}
while(1)
{
printf(" Node p1 pid %d, it's parent pid %d.\n",getpid(),getppid());
sleep(10);
//wait(0);
//return 0;
}
sleep(1);
}