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https://github.com/jart/cosmopolitan.git
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ad97775370
This change also introduces partial faccessat() support for zipos and makes some slight breaking changes in errno results. close() is fixed to use `EBADF` rather than `EINVAL` and we're now using `ENOTSUP` not `EOPNOTSUPP` to indicate that zipos doesn't support a system call yet
57 lines
3.1 KiB
C
57 lines
3.1 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/asan.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/zipos/zipos.internal.h"
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/**
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* Changes owner and/or group of path.
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*
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* @param dirfd is open()'d relative-to directory, or AT_FDCWD, etc.
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* @param uid is user id, or -1 to not change
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* @param gid is group id, or -1 to not change
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* @param flags can have AT_SYMLINK_NOFOLLOW, etc.
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* @return 0 on success, or -1 w/ errno
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* @raise ENOTSUP if `dirfd` or `path` use zip file system
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* @see chown(), lchown() for shorthand notation
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* @see /etc/passwd for user ids
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* @see /etc/group for group ids
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* @asyncsignalsafe
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*/
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int fchownat(int dirfd, const char *path, uint32_t uid, uint32_t gid,
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int flags) {
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int rc;
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if (IsAsan() && !__asan_is_valid(path, 1)) {
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rc = efault();
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} else if (_weaken(__zipos_notat) &&
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(rc = __zipos_notat(dirfd, path)) == -1) {
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rc = enotsup();
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} else {
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rc = sys_fchownat(dirfd, path, uid, gid, flags);
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}
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STRACE("fchownat(%s, %#s, %d, %d, %#b) → %d% m", DescribeDirfd(dirfd), path,
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uid, gid, flags, rc);
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return rc;
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}
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