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56 lines
2.8 KiB
C
56 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/strace.h"
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/**
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* Gets real, effective, and "saved" group ids.
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*
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* @param real receives real user id, or null to do nothing
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* @param effective receives effective user id, or null to do nothing
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* @param saved receives saved user id, or null to do nothing
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* @return 0 on success or -1 w/ errno
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* @see setresuid()
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*/
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int getresgid(uint32_t *real, uint32_t *effective, uint32_t *saved) {
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int rc, gid;
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if (IsWindows()) {
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gid = getgid();
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if (real)
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*real = gid;
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if (effective)
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*effective = gid;
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if (saved)
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*saved = gid;
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rc = 0;
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} else if (saved) {
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rc = sys_getresgid(real, effective, saved);
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} else {
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if (real)
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*real = sys_getgid();
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if (effective)
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*effective = sys_getegid();
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rc = 0;
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}
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STRACE("getresgid([%d], [%d], [%d]) → %d% m", real ? *real : 0,
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effective ? *effective : 0, saved ? *saved : 0, rc);
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return rc;
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}
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