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/* fshelp.h -- Filesystem helper functions */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2004,2005,2006,2007,2008 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef GRUB_FSHELP_HEADER
#define GRUB_FSHELP_HEADER 1
#include <grub/types.h>
#include <grub/symbol.h>
#include <grub/err.h>
typedef struct grub_fshelp_node *grub_fshelp_node_t;
#define GRUB_FSHELP_CASE_INSENSITIVE 0x100
#define GRUB_FSHELP_TYPE_MASK 0xff
#define GRUB_FSHELP_FLAGS_MASK 0x100
enum grub_fshelp_filetype
{
GRUB_FSHELP_UNKNOWN,
GRUB_FSHELP_REG,
GRUB_FSHELP_DIR,
GRUB_FSHELP_SYMLINK
};
/* Lookup the node PATH. The node ROOTNODE describes the root of the
directory tree. The node found is returned in FOUNDNODE, which is
either a ROOTNODE or a new malloc'ed node. ITERATE_DIR is used to
iterate over all directory entries in the current node.
READ_SYMLINK is used to read the symlink if a node is a symlink.
EXPECTTYPE is the type node that is expected by the called, an
error is generated if the node is not of the expected type. Make
sure you use the NESTED_FUNC_ATTR macro for HOOK, this is required
because GCC has a nasty bug when using regparm=3. */
grub_err_t
EXPORT_FUNC(grub_fshelp_find_file) (const char *path,
grub_fshelp_node_t rootnode,
grub_fshelp_node_t *foundnode,
int (*iterate_dir) (grub_fshelp_node_t dir,
int NESTED_FUNC_ATTR
(*hook) (const char *filename,
enum grub_fshelp_filetype filetype,
grub_fshelp_node_t node)),
char *(*read_symlink) (grub_fshelp_node_t node),
enum grub_fshelp_filetype expect);
/* Read LEN bytes from the file NODE on disk DISK into the buffer BUF,
beginning with the block POS. READ_HOOK should be set before
reading a block from the file. GET_BLOCK is used to translate file
blocks to disk blocks. The file is FILESIZE bytes big and the
blocks have a size of LOG2BLOCKSIZE (in log2). */
grub_ssize_t
EXPORT_FUNC(grub_fshelp_read_file) (grub_disk_t disk, grub_fshelp_node_t node,
void NESTED_FUNC_ATTR (*read_hook) (grub_disk_addr_t sector,
unsigned offset,
unsigned length),
grub_off_t pos, grub_size_t len, char *buf,
grub_disk_addr_t (*get_block) (grub_fshelp_node_t node,
grub_disk_addr_t block),
grub_off_t filesize, int log2blocksize);
unsigned int
EXPORT_FUNC(grub_fshelp_log2blksize) (unsigned int blksize,
unsigned int *pow);
#endif /* ! GRUB_FSHELP_HEADER */
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