使用vfork()，后用return 出现段错误问题
#include<stdio.h>
#include<unistd.h>
#include<sys/types.h>
main()
{
pid_t pid;
int count=0;
pid=vfork();
count++;
printf("count=%d, pid=%d\n",count,getpid());
return(0);
}
运行出现count=1，pid=25127
count=1, pid=25126 后又显示“段错误”
尝试把retrurn(0); 改为 exit(0);之后运行结果 count=1;pid=25145
count=2;pid=25144
查看了有关return() 和 exit（）还是不理解，求解释！！！！！！
[解决办法]

NAME
       vfork - create a child process and block parent

SYNOPSIS
       #include <sys/types.h>
       #include <unistd.h>

       pid_t vfork(void);

STANDARD DESCRIPTION
       (From  XPG4  /  SUSv2  /  POSIX draft.)  The vfork() function has the same effect as fork(), except that the behaviour is undefined if the process created by
       vfork() either modifies any data other than a variable of type pid_t used to store the return value from vfork(), or  returns  from  the  function  in  which
       vfork() was called, or calls any other function before successfully calling _exit() or one of the exec family of functions.

ERRORS
       EAGAIN Too many processes - try again.

       ENOMEM There is insufficient swap space for the new process.

LINUX DESCRIPTION
       vfork, just like fork(2), creates a child process of the calling process.  For details and return value and errors, see fork(2).

       vfork()  is  a special case of clone(2).  It is used to create new processes without copying the page tables of the parent process.  It may be useful in per-
       formance sensitive applications where a child will be created which then immediately issues an execve().

       vfork() differs from fork in that the parent is suspended until the child makes a call to execve(2) or _exit(2).  The child shares all memory with  its  par- 
 
       ent, including the stack, until execve() is issued by the child.  The child must not return from the current function or call exit(), but may call _exit().

       Signal handlers are inherited, but not shared.  Signals to the parent arrive after the child releases the parent.

自己读？
[解决办法]

#include<sys/types.h>
#include<unistd.h>
#include<stdio.h>

int main(int argc, char ** argv )
{
　　int pid = fork();

    if (pid < 0)
    {
        printf("error!");
    }
    else if( pid == 0 )
    {
        printf("This is the child process!");
    }
    else
    {
        printf("This is the parent process! child process id = %d", pid);
    }
    
    return 0;
}

[解决办法]

引用:

不理解3楼啥意思，求解释，并非让附程序？？

三楼的意思是让子进程，和父进程有点区别！不过楼主的程序，return和exit应该是一样的！（本人没有验证）
[解决办法]
正如1楼所说：

vfork成功后的话严禁return, 只能调用_exit或者exec族的函数，否则后果不可预料。