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da6b1a8e47
Add facility for testing how (many) file descriptors survive an exec. This allows implementing O_CLOEXEC tests. Signed-off-by: Pekka Paalanen <ppaalanen@gmail.com>
75 lines
2 KiB
C
75 lines
2 KiB
C
/*
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* Copyright © 2012 Collabora, Ltd.
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <limits.h>
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#include "test-runner.h"
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static int
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parse_count(const char *str, int *value)
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{
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char *end;
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long v;
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errno = 0;
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v = strtol(str, &end, 0);
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if ((errno == ERANGE && (v == LONG_MAX || v == LONG_MIN)) ||
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(errno != 0 && v == 0) ||
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(end == str) ||
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(*end != '\0')) {
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return -1;
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}
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if (v < 0 || v > INT_MAX) {
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return -1;
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}
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*value = v;
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return 0;
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}
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int main(int argc, char *argv[])
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{
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int expected;
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if (argc != 2)
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goto help_out;
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if (parse_count(argv[1], &expected) < 0)
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goto help_out;
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if (count_open_fds() == expected)
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return EXIT_SUCCESS;
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else
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return EXIT_FAILURE;
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help_out:
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fprintf(stderr, "Usage: %s N\n"
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"where N is the expected number of open file descriptors.\n"
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"This program exits with a failure if the number "
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"does not match exactly.\n", argv[0]);
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return EXIT_FAILURE;
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}
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