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/* libdiskfs implementation of fs.defs:file_chflags
Copyright (C) 1992, 1993, 1994, 1996, 1998 Free Software Foundation
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include "priv.h"
#include "fs_S.h"
/* Implement file_chflags as described in <hurd/fs.defs>. */
kern_return_t
diskfs_S_file_chflags (struct protid *cred,
int flags)
{
#define HI(X) ((X) & 0xffff0000u)
CHANGE_NODE_FIELD (cred,
({
/* Only root is allowed to change the high 16
bits. */
if ((HI (flags) != HI (np->dn_stat.st_flags))
&& ! idvec_contains (cred->user->uids, 0))
return EPERM;
err = fshelp_isowner (&np->dn_stat, cred->user);
if (!err)
err = diskfs_validate_flags_change (np, flags);
if (!err)
{
np->dn_stat.st_flags = flags;
np->dn_set_ctime = 1;
}
if (!err && np->filemod_reqs)
diskfs_notice_filechange(np, FILE_CHANGED_META,
0, 0);
}));
#undef HI
}
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