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posix: Move environ helper variables next to environ definition (bug 32541)

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This helps with statically interposing getenv.

Updates commit 7a61e7f557
("stdlib: Make getenv thread-safe in more cases").

Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
This commit is contained in:
Florian Weimer
2025-03-07 21:40:55 +01:00
parent 77261698b4
commit 6ef0bd02db
4 changed files with 44 additions and 3 deletions
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38
stdlib/tst-getenv-static.c Normal file
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/* Static interposition of getenv (bug 32541).
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include <support/check.h>
/* Some programs try to interpose getenv for their own use (not
glibc's internal use). Make sure that this is possible without
introducing linker failures due to duplicate symbols. */
char *
getenv (const char *ignored)
{
return NULL;
}
static int
do_test (void)
{
TEST_COMPARE_STRING (getenv ("PATH"), NULL);
return 0;
}
#include <support/test-driver.c>