Posted on 2008-08-27 10:13
Prayer 閱讀(6785)
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LINUX/UNIX/AIX
功能描述：
getpid返回當前進程標識，getppid返回父進程標識。
用法：
#include <sys/types.h>
#include <unistd.h>
pid_t getpid(void);
pid_t getppid(void);
例子：
#include <stdlib.h>
#include <stdio.h>
#include <sys/types.h>
int main(void)
{
pid_t pid;
printf("Before fork ...\n");
switch(pid = fork()) {
case -1:
printf("Fock call fail\n");
exit(1);
case 0:
printf("The pid of child is: %d\n", getpid());
printf("The pid of child's parent is: %d\n", getppid());
printf("Child exiting...\n");
exit(0);
default:
printf("The pid of parent is: %d\n", getpid());
printf("the pid of parent's child is: %d\n", pid);
}
printf("After fork, program exiting...\n");
exit(0);
}