word
鏂囨。
鍙嚜鐢卞鍒剁紪杈?/p>
瀹為獙涓?/p>
缂栧啓澶氳繘绋嬬▼搴?/p>
1
锛庡疄楠岀洰鐨?/p>
閫氳繃缂栧啓澶氳繘绋嬬▼搴忥紝浣胯鑰呯啛缁冩帉鎻?/p>
fork()
銆?/p>
exec()
銆?/p>
wait()
鍜?/p>
waitpid()
绛夊嚱鏁扮殑浣跨敤锛岃繘涓�姝ョ悊瑙?/p>
鍦?/p>
Linux
涓杩涚▼缂栫▼鐨勬楠ゃ�?/p>
2
锛庡疄楠屽唴瀹?/p>
璇ュ疄楠屾湁
3
涓繘绋嬶紝鍏朵腑涓�涓负鐖惰繘绋嬶紝鍏朵綑涓や釜鏄鐖惰繘绋嬪垱寤虹殑瀛愯繘绋嬶紝鍏朵腑涓�涓瓙杩涚▼杩愯
鈥?/p>
ls
-
l鈥?/p>
鎸囦护锛屽彟涓�涓瓙杩涚▼鍦ㄦ殏鍋?/p>
5s
涔嬪悗寮傚父閫�鍑猴紝鐖惰繘绋嬪厛鐢ㄩ樆濉炴柟寮忕瓑寰呯涓�涓瓙杩涚▼鐨勭粨鏉燂紝鐒跺悗鐢?/p>
闈為樆濉炴柟寮忕瓑寰呭彟涓�涓瓙杩涚▼鐨勯��鍑猴紝寰呮敹闆嗗埌绗簩涓瓙杩涚▼缁撴潫鐨勪俊鎭紝鐖惰繘绋嬪氨杩斿洖銆?/p>
3
锛庡疄楠屾楠?/p>
锛?/p>
1
锛夌敾鍑鸿瀹為獙娴佺▼鍥?/p>
璇ュ疄楠屾祦绋嬪浘濡傚浘鎵�绀恒�?/p>
鍥?/p>
瀹為獙
7.1
娴佺▼鍥?/p>
锛?/p>
2
锛夊疄楠屾簮浠ｇ爜锛?/p>
multi_proc.c
锛?/p>
鍏堢湅涓�涓嬩笅闈㈢殑浠ｇ爜锛岃繖涓▼搴忚兘寰楀埌鎴戜滑鎵�甯屾湜鐨勭粨鏋滃悧锛屽畠鐨勮繍琛屼細浜х敓鍑犱釜杩涚▼锛熻璇昏�呭洖
蹇嗕竴涓?/p>
fork()
璋冪敤鐨勫叿浣撹繃绋嬨�?/p>
绛旓細浼氫骇鐢熷洓涓繘绋?/p>
/* multi_proc_wrong.c */
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <unistd.h>
#include <sys/wait.h>
int main(void)
{
pid_t child1, child2, child;
/*
鍒涘缓涓や釜瀛愯繘绋?/p>
*/
child1 = fork();
child2 = fork();
/*
瀛愯繘绋?/p>
1
鐨勫嚭閿欏鐞?/p>
*/
if (child1 == -1)
{
printf("Child1 fork error\n");
exit(1);
}
else if (child1 == 0) /*
鍦ㄥ瓙杩涚▼
1
涓皟鐢?/p>
execlp()
鍑芥暟
*/
{
printf("In child1: execute 'ls -l'\n");
if (execlp("ls", "ls","-l", NULL)<0)
{