41 lines
2.5 KiB
C
41 lines
2.5 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/internal.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Changes owner and/or group of pathname.
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*
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* @param uid is user id, or -1u to not change
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* @param gid is group id, or -1u to not change
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* @return 0 on success, or -1 w/ errno
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* @see fchown() if pathname is already open()'d
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* @see lchown() which does not dereference symbolic links
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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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* @syscall
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*/
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int chown(const char *pathname, uint32_t uid, uint32_t gid) {
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if (!pathname) return efault();
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return fchownat$sysv(AT_FDCWD, pathname, uid, gid, 0);
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}
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