ssize_t fs_load_file(const char *path, void *ptr, size_t maxlen)
{
filehandle *handle;
/* open the file */
status_t err = fs_open_file(path, &handle);
if (err < 0)
return err;
/* stat it for size, see how much we need to read */
struct file_stat stat;
fs_stat_file(handle, &stat);
ssize_t read_bytes = fs_read_file(handle, ptr, 0, MIN(maxlen, stat.size));
fs_close_file(handle);
return read_bytes;
}
/*
* ディレクトリを削除する。
*
*/
W sfs_i_rmdir (struct inode *parent, char *fname,
struct access_info *acc)
{
int nentry;
int i;
int inodeindex;
struct inode *ip;
W rsize, errno;
errno = fs_lookup (parent, fname, O_RDWR, 0, acc, &ip);
if (errno) {
printk("[PM] sfs_i_rmdir: can't remove directory %s(%d)\n", fname, errno);
return (errno);
}
if ((ip->i_mode & SFS_FMT_DIR) == 0) {
fs_close_file(ip);
return (EP_NOTDIR);
}
if (ip->i_refcount >= 2) {
fs_close_file(ip);
return (EP_BUSY);
}
nentry = sfs_read_dir (ip, 0, NULL);
if (nentry >= 3) {
fs_close_file(ip);
return (EP_NOTEMPTY);
}
nentry = sfs_read_dir (parent, 0, NULL);
if (nentry <= 0) {
fs_close_file(ip);
return (EP_NOENT);
}
{
struct sfs_dir buf[nentry]; /* GCC の拡張機能を使っている */
if (sfs_read_dir (parent, nentry, buf) != 0) {
fs_close_file(ip);
return (EP_IO);
}
for (i = 0; i < nentry; i++) {
/* 表示文字長を SFS_MAXNAMELEN にするため．後に pad があるので大丈夫 */
if (strncmp (fname, buf[i].sfs_d_name, SFS_MAXNAMELEN+1) == 0) {
inodeindex = buf[i].sfs_d_index;
break;
}
}
if (i >= nentry) {
fs_close_file(ip);
return (EP_NOENT);
}
while (i < nentry) {
buf[i].sfs_d_index = buf[i + 1].sfs_d_index;
/* 表示文字長を SFS_MAXNAMELEN にするため．後に pad があるので大丈夫 */
strncpy (buf[i].sfs_d_name, buf[i + 1].sfs_d_name, SFS_MAXNAMELEN+1);
i++;
}
i = parent->i_size - sizeof (struct sfs_dir);
sfs_i_write(parent, 0, (B *)buf, i, &rsize);
sfs_i_truncate (parent, i);
ip->i_link--;
ip->i_dirty = 1;
if (ip->i_link <= 1) {
sfs_i_truncate (ip, 0);
sfs_free_inode(ip->i_fs, inodeindex);
}
parent->i_link -= 1;
parent->i_dirty = 1;
}
fs_close_file(ip);
return (EP_OK);
}