diff options
Diffstat (limited to 'libdiskfs/file-chmod.c')
| -rw-r--r-- | libdiskfs/file-chmod.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/libdiskfs/file-chmod.c b/libdiskfs/file-chmod.c new file mode 100644 index 00000000..09bbe0ea --- /dev/null +++ b/libdiskfs/file-chmod.c @@ -0,0 +1,55 @@ +/* libdiskfs implementation of fs.defs: file_chmod + Copyright (C) 1992, 1993, 1994, 1996, 1997 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" + +/* Implement file_chmod as described in <hurd/fs.defs>. */ +error_t +diskfs_S_file_chmod (struct protid *cred, + mode_t mode) +{ + mode &= ~(S_IFMT | S_ISPARE | S_ITRANS); + + CHANGE_NODE_FIELD (cred, + ({ + if (!(err = fshelp_isowner (&np->dn_stat, cred->user))) + { + if (!idvec_contains (cred->user->uids, 0)) + { + if (!S_ISDIR (np->dn_stat.st_mode)) + mode &= ~S_ISVTX; + if (!idvec_contains (cred->user->gids, + np->dn_stat.st_gid)) + mode &= ~S_ISGID; + if (!idvec_contains (cred->user->uids, + np->dn_stat.st_uid)) + mode &= ~S_ISUID; + } + mode |= (np->dn_stat.st_mode & (S_IFMT | S_ISPARE)); + err = diskfs_validate_mode_change (np, mode); + if (!err) + { + np->dn_stat.st_mode = mode; + np->dn_set_ctime = 1; + if (np->filemod_reqs) + diskfs_notice_filechange(np, + FILE_CHANGED_META, + 0, 0); + } + } + })); +} |