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