27 lines
491 B
C
27 lines
491 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2020 FUJITSU LIMITED. All rights reserved.
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* Author: Yang Xu <xuyang2018.jy@cn.fujitsu.com
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <fcntl.h>
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int main(int argc, char **argv)
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{
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int fd;
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if (argc != 2) {
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fprintf(stderr, "Only two arguments: %s <fd>\n", argv[0]);
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exit(1);
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}
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fd = atoi(argv[1]);
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if (fcntl(fd, F_GETFL) < 0 && errno == EBADF)
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return 0;
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return 1;
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}
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