63 lines
1.9 KiB
C
63 lines
1.9 KiB
C
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/* @(#)fchownat.c 1.2 13/10/30 Copyright 2013 J. Schilling */
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/*
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* Emulate the behavior of fchownat(int fd, const char *name,
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* uid_t owner, gid_t group, int flag)
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*
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* Note that emulation methods that do not use the /proc filesystem are
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* not MT safe. In the non-MT-safe case, we do:
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*
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* savewd()/fchdir()/open(name)/restorewd()
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*
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* Errors may force us to abort the program as our caller is not expected
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* to know that we do more than a simple open() here and that the
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* working directory may be changed by us.
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*
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* Copyright (c) 2013 J. Schilling
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*/
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/*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* See the file CDDL.Schily.txt in this distribution for details.
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* A copy of the CDDL is also available via the Internet at
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* http://www.opensource.org/licenses/cddl1.txt
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file CDDL.Schily.txt from this distribution.
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*/
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#include <schily/unistd.h>
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#include <schily/types.h>
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#include <schily/fcntl.h>
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#include <schily/maxpath.h>
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#include <schily/errno.h>
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#include <schily/standard.h>
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#include <schily/schily.h>
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#include "at-defs.h"
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#ifndef HAVE_FCHOWNAT
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#ifndef HAVE_LCHOWN
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#define lchown chown
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#endif
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/* CSTYLED */
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#define PROTO_DECL , uid_t owner, gid_t group, int flag
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#define KR_DECL uid_t owner; gid_t group; int flag;
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/* CSTYLED */
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#define KR_ARGS , owner, group, flag
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#define FUNC_CALL(n) (flag & AT_SYMLINK_NOFOLLOW ? \
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lchown(n, owner, group) : chown(n, owner, group))
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#define FLAG_CHECK() if (flag & ~(AT_SYMLINK_NOFOLLOW)) { \
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seterrno(EINVAL); \
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return (-1); \
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}
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#define FUNC_NAME fchownat
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#define FUNC_RESULT int
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#include "at-base.c"
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#endif /* HAVE_FCHOWNAT */
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