linux fork()º¯Êýѧϰ
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
int main()
{
pid_t pid;
static int n = 0;
printf("fork!\n"); /*printf("fork!")*/
switch (pid = fork())
{
case -1:
{
/* ÕâÀïpidΪ-1£¬forkº¯Êýʧ°Ü */
/* һЩ¿ÉÄܵÄÔÒòÊÇ */
/* ½ø³ÌÊý»òÐéÄâÄÚ´æÓþ¡ */
perror("The fork failed!");
break;
}
case 0:
{
/* pidΪ0£¬×Ó½ø³Ì */
printf("[child]i am child!\n");
printf("[child]getpid=[%d]\n", getpid() );
printf("[child]pid=[%d]\n", pid );
break;
}
default:
{
/* pid´óÓÚ0£¬¸¸½ø³Ì */
printf("[parent]i am parent!\n" );
printf("[parent]getpid=[%d]\n",getpid() );
printf("[paren
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