mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
51 lines
2.8 KiB
C
51 lines
2.8 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
|
|
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2020 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/syscall-sysv.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
|
|
/**
|
|
* Gets real, effective, and "saved" group ids.
|
|
*
|
|
* @param real receives real user id, or null to do nothing
|
|
* @param effective receives effective user id, or null to do nothing
|
|
* @param saved receives saved user id, or null to do nothing
|
|
* @return 0 on success or -1 w/ errno
|
|
* @see setresuid()
|
|
*/
|
|
int getresgid(uint32_t *real, uint32_t *effective, uint32_t *saved) {
|
|
int rc, gid;
|
|
if (IsWindows()) {
|
|
gid = getgid();
|
|
if (real) *real = gid;
|
|
if (effective) *effective = gid;
|
|
if (saved) *saved = gid;
|
|
rc = 0;
|
|
} else if (saved) {
|
|
rc = sys_getresgid(real, effective, saved);
|
|
} else {
|
|
if (real) *real = sys_getgid();
|
|
if (effective) *effective = sys_getegid();
|
|
rc = 0;
|
|
}
|
|
STRACE("getresgid([%d], [%d], [%d]) → %d% m", real ? *real : 0,
|
|
effective ? *effective : 0, saved ? *saved : 0, rc);
|
|
return rc;
|
|
}
|