mirror of git://sourceware.org/git/glibc.git
59 lines
1.4 KiB
C
59 lines
1.4 KiB
C
/* Test the value of errno at program startup.
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Copyright (C) 2024 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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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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/* Verify that errno is 0 at first ELF constructor execution and at
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the start of main. */
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static void set_ctor_errno (void) __attribute__((constructor));
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static int ctor_errno = -1;
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static void
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set_ctor_errno (void)
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{
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ctor_errno = errno;
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}
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static int
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get_ctor_errno (void)
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{
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return ctor_errno;
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}
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int
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main (void)
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{
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if (errno != 0)
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{
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printf ("At start of main errno set to %d != 0\n", errno);
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exit (1);
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}
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if (get_ctor_errno () != 0)
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{
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printf ("At ctor exec errno set to %d != 0\n", get_ctor_errno ());
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exit (1);
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}
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return 0;
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}
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