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47 lines
2.6 KiB
C
47 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/syscall-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/_getauxval.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/sysv/consts/auxv.h"
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/**
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* Determines if process is tainted.
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*
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* This function returns 1 if process was launched as a result of an
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* execve() call on a binary that had the setuid or setgid bits set.
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* FreeBSD defines tainted as including processes that changed their
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* effective user / group ids at some point.
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*
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* @return always successful, 1 if yes, 0 if no
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*/
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int issetugid(void) {
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int rc;
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if (IsLinux()) {
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rc = !!_getauxval(AT_SECURE).value;
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} else if (IsMetal()) {
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rc = 0;
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} else {
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rc = sys_issetugid();
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}
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STRACE("issetugid() → %d", rc);
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return rc;
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}
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