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- /*
- * linux/fs/ext2/acl.c
- *
- * Copyright (C) 1993, 1994 Remy Card (card@masi.ibp.fr)
- * Laboratoire MASI - Institut Blaise Pascal
- * Universite Pierre et Marie Curie (Paris VI)
- */
-
- /*
- * This file will contain the Access Control Lists management for the
- * second extended file system.
- */
-
- #include <linux/errno.h>
- #include <linux/fs.h>
- #include <linux/ext2_fs.h>
- #include <linux/sched.h>
- #include <linux/stat.h>
-
- /*
- * ext2_permission ()
- *
- * Check for access rights
- */
- int ext2_permission (struct inode * inode, int mask)
- {
- unsigned short mode = inode->i_mode;
-
- /*
- * Special case, access is always granted for root
- */
- if (suser ())
- return 1;
- /*
- * If no ACL, checks using the file mode
- */
- else if (current->euid == inode->i_uid)
- mode >>= 6;
- else if (in_group_p (inode->i_gid))
- mode >>= 3;
- if (((mode & mask & S_IRWXO) == mask))
- return 1;
- else
- return 0;
- }
-