Ron Williams
47 lines
1.0 KiB
C
47 lines
1.0 KiB
C
#include <unistd.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include "test_helpers.h"
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int main(void) {
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int fd0 = creat("dup.out", 0777);
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ERROR_IF(creat, fd0, == -1);
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UNEXP_IF(creat, fd0, < 0);
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int fd1 = open("dup.out", 0);
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ERROR_IF(open, fd1, == -1);
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UNEXP_IF(open, fd1, < 0);
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int fd2 = dup(fd1);
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ERROR_IF(dup, fd2, == -1);
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UNEXP_IF(dup, fd2, < 0);
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printf("duped fd is %d greater than the original fd\n", fd2 - fd1);
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int c1 = close(fd1);
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ERROR_IF(close, c1, == -1);
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UNEXP_IF(close, c1, != 0);
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int c2 = close(fd2);
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ERROR_IF(close, c2, == -1);
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UNEXP_IF(close, c2, != 0);
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int fd3 = open("dup.out", O_RDWR);
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ERROR_IF(open, fd3, == -1);
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UNEXP_IF(open, fd3, < 0);
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int fd4 = dup2(fd3, 1);
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ERROR_IF(dup2, fd4, == -1);
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UNEXP_IF(dup2, fd4, < 0);
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int p = printf("hello fd %d", fd3);
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ERROR_IF(printf, p, == -1);
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UNEXP_IF(printf, p, < 0);
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int c3 = close(fd3);
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ERROR_IF(close, c3, == -1);
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UNEXP_IF(close, c3, != 0);
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}
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