37 lines
763 B
C
37 lines
763 B
C
#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#define MAX_BUFF 1024
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int main(int argc, char **argv) {
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/* fd[0] read, fd[1] write */
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int fd[2];
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pid_t pid;
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char buff[MAX_BUFF];
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if (pipe(fd) < 0) {
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printf("pipe fails\n");
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return -1;
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}
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if ((pid = fork()) < 0) {
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printf("fork fails\n");
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return -1;
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} else if (pid > 0) {
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char *msg = "Msg from parent process";
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// parent process
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// 关闭读端，写消息
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close(fd[0]);
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write(fd[1], msg, strlen(msg));
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} else {
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// child process
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// 关闭写端，读消息
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close(fd[1]);
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read(fd[0], buff, MAX_BUFF);
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printf("Read msg: %s\n", buff);
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}
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return 0;
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}
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