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32 lines
685 B
C
32 lines
685 B
C
#include "cmd_test.h"
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#include <libc/stdio.h>
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#include <libc/stdlib.h>
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#include <libc/string.h>
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#include <libc/unistd.h>
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int shell_pipe_test(int argc, char **argv)
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{
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int ret = -1;
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int fd[2];
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pid_t pid;
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char buf[512] = {0};
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char *msg = "hello world";
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ret = pipe(fd);
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if (-1 == ret) {
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printf("failed to create pipe\n");
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return -1;
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}
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pid = fork();
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if (0 == pid) {
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// close(fd[0]);
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ret = write(fd[1], msg, strlen(msg));
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exit(0);
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} else {
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// close(fd[1]);
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ret = read(fd[0], buf, sizeof(buf));
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printf("parent read %d bytes data: %s\n", ret, buf);
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}
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return 0;
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} |