static int msdos_readdir(struct inode *inode,struct file *filp,
struct dirent *dirent,int count)
{
int ino,i,i2,last;
char c,*walk;
struct buffer_head *bh;
struct msdos_dir_entry *de;
if (!inode || !S_ISDIR(inode->i_mode)) return -EBADF;
if (inode->i_ino == MSDOS_ROOT_INO) {
/* Fake . and .. for the root directory. */
if (filp->f_pos == 2) filp->f_pos = 0;
else if (filp->f_pos < 2) {
walk = filp->f_pos++ ? ".." : ".";
for (i = 0; *walk; walk++)
put_fs_byte(*walk,dirent->d_name+i++);
put_fs_long(MSDOS_ROOT_INO,&dirent->d_ino);
put_fs_byte(0,dirent->d_name+i);
put_fs_word(i,&dirent->d_reclen);
return i;
}
}
if (filp->f_pos & (sizeof(struct msdos_dir_entry)-1)) return -ENOENT;
bh = NULL;
while ((ino = msdos_get_entry(inode,&filp->f_pos,&bh,&de)) > -1) {
if (!IS_FREE(de->name) && !(de->attr & ATTR_VOLUME)) {
for (i = last = 0; i < 8; i++) {
if (!(c = de->name[i])) break;
if (c >= 'A' && c <= 'Z') c += 32;
if (c != ' ') last = i+1;
put_fs_byte(c,i+dirent->d_name);
}
i = last;
put_fs_byte('.',i+dirent->d_name);
i++;
for (i2 = 0; i2 < 3; i2++) {
if (!(c = de->ext[i2])) break;
if (c >= 'A' && c <= 'Z') c += 32;
if (c != ' ') last = i+1;
put_fs_byte(c,i+dirent->d_name);
i++;
}
if ((i = last) != 0) {
if (!strcmp(de->name,MSDOS_DOT))
ino = inode->i_ino;
else if (!strcmp(de->name,MSDOS_DOTDOT))
ino = msdos_parent_ino(inode,0);
put_fs_long(ino,&dirent->d_ino);
put_fs_byte(0,i+dirent->d_name);
put_fs_word(i,&dirent->d_reclen);
brelse(bh);
return i;
}
}
}
if (bh) brelse(bh);
return 0;
}
int msdos_rmdir(struct inode *dir,const char *name,int len)
{
int res,ino,pos;
struct buffer_head *bh,*dbh;
struct msdos_dir_entry *de,*dde;
struct inode *inode;
bh = NULL;
inode = NULL;
res = -EINVAL;
if (get_fs_byte(name) == '.' && (len == 1 || (len == 2 &&
get_fs_byte(name+1) == '.'))) goto rmdir_done;
if ((res = msdos_find(dir,name,len,&bh,&de,&ino)) < 0) goto rmdir_done;
res = -ENOENT;
if (!(inode = iget(dir->i_dev,ino))) goto rmdir_done;
res = -ENOTDIR;
if (!S_ISDIR(inode->i_mode)) goto rmdir_done;
res = -EBUSY;
if (dir->i_dev != inode->i_dev || dir == inode) goto rmdir_done;
if (inode->i_count > 1) goto rmdir_done;
if (MSDOS_I(inode)->i_start) { /* may be zero in mkdir */
res = -ENOTEMPTY;
pos = 0;
dbh = NULL;
while (msdos_get_entry(inode,&pos,&dbh,&dde) > -1)
if (dde->name[0] && ((unsigned char *) dde->name)[0] !=
DELETED_FLAG && strncmp(dde->name,MSDOS_DOT,
MSDOS_NAME) && strncmp(dde->name,MSDOS_DOTDOT,
MSDOS_NAME)) goto rmdir_done;
if (dbh) brelse(dbh);
}
inode->i_nlink = 0;
dir->i_mtime = CURRENT_TIME;
dir->i_nlink--;
inode->i_dirt = dir->i_dirt = 1;
de->name[0] = DELETED_FLAG;
bh->b_dirt = 1;
res = 0;
rmdir_done:
brelse(bh);
iput(dir);
iput(inode);
return res;
}