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/*
* linux/fs/affs/symlink.c
*
* 1995 Hans-Joachim Widmaier - Modified for affs.
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* affs symlink handling code
*/
#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/malloc.h>
#include <linux/fs.h>
#include <linux/stat.h>
#include <linux/affs_fs.h>
#include <linux/amigaffs.h>
#include <asm/uaccess.h>
#define MIN(a,b) (((a) < (b)) ? (a) : (b))
static int affs_readlink(struct inode *, char *, int);
struct inode_operations affs_symlink_inode_operations = {
NULL, /* no file-operations */
NULL, /* create */
NULL, /* lookup */
NULL, /* link */
NULL, /* unlink */
NULL, /* symlink */
NULL, /* mkdir */
NULL, /* rmdir */
NULL, /* mknod */
NULL, /* rename */
affs_readlink, /* readlink */
NULL, /* bmap */
NULL, /* truncate */
NULL /* permission */
};
static int
affs_readlink(struct inode *inode, char *buffer, int buflen)
{
struct buffer_head *bh;
struct slink_front *lf;
int i, j;
char c;
char lc;
pr_debug("AFFS: readlink(ino=%lu,buflen=%d)\n",inode->i_ino,buflen);
bh = affs_bread(inode->i_dev,inode->i_ino,AFFS_I2BSIZE(inode));
i = 0;
j = 0;
if (!bh) {
affs_error(inode->i_sb,"readlink","Cannot read block %lu\n",inode->i_ino);
goto symlink_end;
}
lf = (struct slink_front *)bh->b_data;
lc = 0;
if (strchr(lf->symname,':')) { /* Handle assign or volume name */
while (i < buflen && (c = inode->i_sb->u.affs_sb.s_prefix[i])) {
put_user(c,buffer++);
i++;
}
while (i < buflen && (c = lf->symname[j]) != ':') {
put_user(c,buffer++);
i++, j++;
}
if (i < buflen) {
put_user('/',buffer++);
i++, j++;
}
lc = '/';
}
while (i < buflen && (c = lf->symname[j])) {
if (c == '/' && lc == '/' && (i + 3 < buflen)) { /* parent dir */
put_user('.',buffer++);
put_user('.',buffer++);
i += 2;
}
put_user(c,buffer++);
lc = c;
i++, j++;
}
symlink_end:
iput(inode);
affs_brelse(bh);
return i;
}
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