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/* provide consistent interface to chown for systems that don't interpret
an ID of -1 as meaning `don't change the corresponding ID'.
Copyright (C) 1997, 2000 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* written by Jim Meyering */
#include <config.h>
/* Disable the definition of chown to rpl_chown (from config.h) in this
file. Otherwise, we'd get conflicting prototypes for rpl_chown on
most systems. */
#undef chown
#include <sys/types.h>
#include <sys/stat.h>
#if HAVE_UNISTD_H
# include <unistd.h>
#endif
/* FIXME: describe. */
int
rpl_chown (const char *file, uid_t uid, gid_t gid)
{
if (gid == (gid_t) -1 || uid == (uid_t) -1)
{
struct stat file_stats;
/* Stat file to get id(s) that should remain unchanged. */
if (stat (file, &file_stats))
return 1;
if (gid == (gid_t) -1)
gid = file_stats.st_gid;
if (uid == (uid_t) -1)
uid = file_stats.st_uid;
}
return chown (file, uid, gid);
}
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