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/*
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* 测试成功时输出：
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* "clone success."
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* 测试失败时输出：
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* "clone error."
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <assert.h>
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#include <signal.h>
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#include <linux/sched.h>
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size_t stack[1024] = {0};
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static int child_pid;
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int g_shared = 0;
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static int child_func(void){
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g_shared = 1;
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printf(" Child says hello.\n");
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return 0;
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}
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void test_clone(void){
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int wstatus;
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child_pid = clone(child_func, stack+1024, SIGCHLD|CLONE_VM);
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assert(child_pid != -1);
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if (child_pid == 0){
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exit(0);
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}
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printf("child pid: %d\n", child_pid);
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int ret = wait(&wstatus);
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if(ret == child_pid) {
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if (g_shared == 1) {
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printf("clone success.\n");
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}
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}
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else {
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printf("clone error.\n");
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}
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}
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int main(void){
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test_clone();
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return 0;
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}
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