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2c1f4ce368
* conf/i386-pc.rmk (kernel_img_SOURCES): Added kern/fshelp.c. (grub_mkimage_LDFLAGS): Likewise. (grub_emu_SOURCES): Likewise. (kernel_img_HEADERS): Added fshelp.h. * fs/ext2.c: Include <grub/fshelp.h>. (FILETYPE_REG): New macro. (FILETYPE_INO_REG): Likewise. (grub_ext_sblock): Renamed to `grub_ext2_sblock'. Changed all users. (ext2_block_group): Renamed to `grub_ext2_block_group'. Changed all users. (grub_fshelp_node): New struct. (grub_ext2_data): Added member `diropen'. Changed member `inode' to a pointer. (grub_ext2_get_file_block): Removed function. (grub_ext2_read_block): New function. (grub_ext2_read_file): Replaced parameter `data' by `node'. This function was written. (grub_ext2_mount): Read the root inode. Create a diropen struct. (grub_ext2_find_file): Removed function. (grub_ext2_read_symlink): New function. (grub_ext2_iterate_dir): Likewise. (grub_ext2_open): Rewritten. (grub_ext2_dir): Rewritten. * include/grub/fshelp.h: New file. * fs/fshelp.c: Likewise.
76 lines
2.9 KiB
C
76 lines
2.9 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 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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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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typedef struct grub_fshelp_node *grub_fshelp_node_t;
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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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/* 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. Make
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sure you use the NESTED_FUNC_ATTR macro for HOOK, this is required
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because GCC has a nasty bug when using regparm=3. */
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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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int NESTED_FUNC_ATTR
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(*hook) (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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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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void (*read_hook) (unsigned long sector,
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unsigned offset,
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unsigned length),
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int pos, unsigned int len, char *buf,
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int (*get_block) (grub_fshelp_node_t node,
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int block),
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unsigned int filesize, int log2blocksize);
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#endif /* ! GRUB_FSHELP_HEADER */
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