mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
52 lines
2.7 KiB
C
52 lines
2.7 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/groups.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/asan.internal.h"
|
|
#include "libc/intrin/describeflags.internal.h"
|
|
#include "libc/intrin/strace.internal.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
/**
|
|
* Sets list of supplementary group IDs.
|
|
*
|
|
* On recent versions of Linux only, it's possible to say:
|
|
*
|
|
* setgroups(0, NULL);
|
|
*
|
|
* Which will cause subsequent calls to `EPERM`.
|
|
*
|
|
* @param size number of items in list
|
|
* @param list input set of gid_t to set
|
|
* @return -1 w/ EFAULT
|
|
*/
|
|
int setgroups(size_t size, const uint32_t list[]) {
|
|
int rc;
|
|
if (IsAsan() && size && !__asan_is_valid(list, size * sizeof(list[0]))) {
|
|
rc = efault();
|
|
} else if (IsLinux() || IsNetbsd() || IsOpenbsd() || IsFreebsd() || IsXnu()) {
|
|
rc = sys_setgroups(size, list);
|
|
} else {
|
|
rc = enosys();
|
|
}
|
|
STRACE("setgroups(%u, %s) → %d% m", size, DescribeGidList(rc, size, list),
|
|
rc);
|
|
return rc;
|
|
}
|