3.c源码

#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <stdlib.h>
int main()
{
int i;
pid_t pid;
for (i = 0; i < 50; ++i)
{
pid = fork();
switch(pid)
{
case -1:
perror("fork");
exit(-1);
case 0: //child
printf("I am child");
exit(0);
default:
break;
}
}
while (1)
{
sleep(1);
printf("I am parent/n");
}
return 0; //will never reach here
}

2.编译C语言​​​​

[root@node02:/home/sa.haibo.he]$ gcc -o 3 3.c
[root@node02:/home/sa.haibo.he]$ ./3
I am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am childI am parent

I am parent
I am parent
I am parent

3.查看僵尸进程

[root@node02:/root]$ ps -ef | grep defunct | grep -v grep | wc -l
50

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