Fork and Vfork issues

Vfork and Fork
Two functions are used to create a child process.
Difference: 1. Vfork before the child process calls exec, it is in the space of the parent process.

2. Vfork guarantees that the child process runs first and the parent process starts running after calling exec.

#include <stdio.h> #include <stdlib.h>int main (int argc, char *argv[]) {    int pid,varble = 0;    if (PID = Vfork ()) < 0) {        printf ("Vfork error!\n");    } else if (PID = = 0) {

<span style= "white-space:pre" ></span>varble =;        Exit (0);    }    printf ("pid =%d,var =%d\n", Getpid (), varble);    return 0;}

Code Problem Resolution:

1. exit (); correct execution

2. return 0; The return stack is faulted because the process stack is shared. The program is out of chaos.

Fork and Vfork issues