Created
September 19, 2017 08:18
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#define _GNU_SOURCE | |
#include <sys/types.h> | |
#include <sys/wait.h> | |
#include <stdio.h> | |
#include <sched.h> | |
#include <signal.h> | |
#include <unistd.h> | |
#define STACK_SIZE (1024 * 1024) | |
static char container_stack[STACK_SIZE]; | |
char* const container_args[] = { | |
"/bin/bash", | |
NULL | |
}; | |
int container_main(void* arg) | |
{ | |
printf("Container - inside the container!\n"); | |
// sethostname("container",10); /* 设置hostname */ | |
// system("mount -t proc proc /proc"); | |
execv(container_args[0], container_args); | |
printf("Something's wrong!\n"); | |
return 1; | |
} | |
int main() | |
{ | |
printf("Parent - start a container!\n"); | |
/* 调用clone函数,其中传出一个函数,还有一个栈空间的(为什么传尾指针,因为栈是反着的) */ | |
int container_pid = clone(container_main, container_stack+STACK_SIZE, | |
CLONE_NEWUTS | CLONE_NEWIPC | CLONE_NEWPID | CLONE_NEWNS | SIGCHLD, NULL); | |
/* 等待子进程结束 */ | |
waitpid(container_pid, NULL, 0); | |
printf("Parent - container stopped!\n"); | |
return 0; | |
} |
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