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44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
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/* Support functions handling ptrace_scope.
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Copyright (C) 2019 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 <support/check.h>
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#include <support/xstdio.h>
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#include <support/xptrace.h>
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int
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support_ptrace_scope (void)
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{
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int ptrace_scope = -1;
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#ifdef __linux__
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/* YAMA may be not enabled. Otherwise it contains a value from 0 to 3:
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- 0 classic ptrace permissions
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- 1 restricted ptrace
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- 2 admin-only attach
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- 3 no attach */
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FILE *f = fopen ("/proc/sys/kernel/yama/ptrace_scope", "r");
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if (f != NULL)
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{
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TEST_COMPARE (fscanf (f, "%d", &ptrace_scope), 1);
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xfclose (f);
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}
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#endif
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return ptrace_scope;
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}
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