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76 lines
2.1 KiB
C
76 lines
2.1 KiB
C
/* Copyright (C) 2017-2020 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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/* Verify that tunables correctly filter out unsafe tunables like
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glibc.malloc.check and glibc.malloc.mmap_threshold but also retain
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glibc.malloc.mmap_threshold in an unprivileged child. */
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/* This is compiled as part of the testsuite but needs to see
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HAVE_TUNABLES. */
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#define _LIBC 1
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#include "config.h"
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#undef _LIBC
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#define test_parent test_parent_tunables
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#define test_child test_child_tunables
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static int test_child_tunables (void);
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static int test_parent_tunables (void);
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#include "tst-env-setuid.c"
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#define CHILD_VALSTRING_VALUE "glibc.malloc.mmap_threshold=4096"
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#define PARENT_VALSTRING_VALUE \
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"glibc.malloc.check=2:glibc.malloc.mmap_threshold=4096"
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static int
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test_child_tunables (void)
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{
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const char *val = getenv ("GLIBC_TUNABLES");
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#if HAVE_TUNABLES
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if (val != NULL && strcmp (val, CHILD_VALSTRING_VALUE) == 0)
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return 0;
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if (val != NULL)
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printf ("Unexpected GLIBC_TUNABLES VALUE %s\n", val);
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return 1;
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#else
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if (val != NULL)
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{
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printf ("GLIBC_TUNABLES not cleared\n");
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return 1;
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}
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return 0;
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#endif
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}
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static int
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test_parent_tunables (void)
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{
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const char *val = getenv ("GLIBC_TUNABLES");
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if (val != NULL && strcmp (val, PARENT_VALSTRING_VALUE) == 0)
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return 0;
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if (val != NULL)
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printf ("Unexpected GLIBC_TUNABLES VALUE %s\n", val);
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return 1;
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}
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