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/*
* linux/fs/minix/dir.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*
* minix directory handling functions
*/
#include <linux/string.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/minix_fs.h>
#include <linux/stat.h>
static int minix_readdir(struct file *, void *, filldir_t);
struct file_operations minix_dir_operations = {
read: generic_read_dir,
readdir: minix_readdir,
fsync: file_fsync,
};
static int minix_readdir(struct file * filp,
void * dirent, filldir_t filldir)
{
unsigned int offset;
struct buffer_head * bh;
struct minix_dir_entry * de;
struct minix_sb_info * info;
struct inode *inode = filp->f_dentry->d_inode;
info = &inode->i_sb->u.minix_sb;
if (filp->f_pos & (info->s_dirsize - 1))
return -EBADF;
while (filp->f_pos < inode->i_size) {
offset = filp->f_pos & 1023;
bh = minix_bread(inode,(filp->f_pos)>>BLOCK_SIZE_BITS,0);
if (!bh) {
filp->f_pos += 1024-offset;
continue;
}
do {
de = (struct minix_dir_entry *) (offset + bh->b_data);
if (de->inode) {
int size = strnlen(de->name, info->s_namelen);
if (filldir(dirent, de->name, size, filp->f_pos, de->inode, DT_UNKNOWN) < 0) {
brelse(bh);
return 0;
}
}
offset += info->s_dirsize;
filp->f_pos += info->s_dirsize;
} while (offset < 1024 && filp->f_pos < inode->i_size);
brelse(bh);
}
UPDATE_ATIME(inode);
return 0;
}
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