diff options
Diffstat (limited to 'libdiskfs')
-rw-r--r-- | libdiskfs/file-access.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/libdiskfs/file-access.c b/libdiskfs/file-access.c new file mode 100644 index 00000000..3f24d07d --- /dev/null +++ b/libdiskfs/file-access.c @@ -0,0 +1,46 @@ +/* + Copyright (C) 1994 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" + +kern_return_t +diskfs_S_file_access (struct protid *cred, + int type) +{ + struct node *np; + error_t err; + + if (!cred) + return EOPNOTSUPP; + + if (type & ~(R_OK|W_OK|X_OK)) + return EINVAL; + + np = cred->po->np; + mutex_lock (&np->lock); + err = 0; + if (type & R_OK) + err = diskfs_access (np, S_IREAD, cred); + if (!err && (type & W_OK)) + err = diskfs_access (np, S_IWRITE, cred); + if (!err && (type & X_OK)) + err = diskfs_access (np, S_IEXEC, cred); + mutex_unlock (&np->lock); + + return err; +} |