#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>
void fun1() {
pid_t fd;
int pipefd[2];
if (0 > pipe(pipefd)) {
fprintf(stderr, "pipe errno is %s\n", strerror(errno));
} else {
}
if (0 > (fd = fork())) {
fprintf(stderr, "fork errno is %s\n", strerror(errno));
} else if (fd == 0) {
//子进程
close(pipefd[0]);
char buf[15] = { '\0' };
while (1) {
fgets(buf, sizeof(buf) - 1, stdin);
if (0 > write(pipefd[1], buf, sizeof(buf)-1)) {
fprintf(stderr, "write errno is %s\n", strerror(errno));
}
memset(buf, 0, sizeof(buf));
printf("chlid\n");
}
close(pipefd[1]);
exit(0);
} else {
//父进程
close(pipefd[1]);
char buf[10] = { '\0' };
memset(buf, 0, sizeof(buf));
while (1) {
int k=0;
while (0!=(k= read(pipefd[0], buf, sizeof(buf) - 1))) {
printf("parent = %s k=%d\n", buf,k);
memset(buf, 0, sizeof(buf));
k=0;
}
// fprintf(stderr, "read errno is %s\n", strerror(errno));
}
close(pipefd[0]);
exit(0);
}
}
int main(void) {
fun1();
puts("!!!Hello World!!!"); /* prints !!!Hello World!!! */
return EXIT_SUCCESS;
}
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