40 lines
693 B
C
40 lines
693 B
C
#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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int main(int argc, char **argv)
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{
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pid_t pid;
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/*
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* 如果 ./fork1 > /tmp/out
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* begin会由父进程输出两次
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* 缓冲问题
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* 文件时全缓冲
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*/
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printf("[%d]Begin!\n", getpid());
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fflush(NULL); // !!! 在fork之前刷新该刷新的流
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pid = fork();
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if (pid < 0)
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{
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perror("fork()");
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exit(1);
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}
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if (pid == 0) // child
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{
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printf("[%d]Child is working!\n", getpid());
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}
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else // parent
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{
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printf("[%d]Parent is working!\n", getpid());
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}
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printf("[%d]End!\n", getpid());
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// getchar();
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exit(0);
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} |