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