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37 lines
1.2 KiB
C
37 lines
1.2 KiB
C
/* Error-checking wrapper for sysconf.
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Copyright (C) 2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <support/check.h>
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#include <support/xunistd.h>
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long
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xsysconf (int name)
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{
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/* Detect errors by a changed errno value, in case -1 is a valid
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value. Make sure that the caller does not see the zero value for
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errno. */
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int old_errno = errno;
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errno = 0;
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long result = sysconf (name);
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if (errno != 0)
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FAIL_EXIT1 ("sysconf (%d): %m", name);
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errno = old_errno;
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return result;
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}
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