236 lines
6.1 KiB
C
236 lines
6.1 KiB
C
/* hfspbless.c - set the hfs+ boot directory. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2005,2007,2008,2009,2012,2013 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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#include <grub/command.h>
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#include <grub/fs.h>
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#include <grub/misc.h>
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#include <grub/dl.h>
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#include <grub/device.h>
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#include <grub/disk.h>
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#include <grub/hfsplus.h>
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#include <grub/hfs.h>
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#include <grub/partition.h>
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#include <grub/file.h>
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#include <grub/mm.h>
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#include <grub/err.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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struct find_node_context
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{
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grub_uint64_t inode_found;
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char *dirname;
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enum
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{ FOUND_NONE, FOUND_FILE, FOUND_DIR } found;
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};
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static int
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find_inode (const char *filename,
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const struct grub_dirhook_info *info, void *data)
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{
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struct find_node_context *ctx = data;
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if (!info->inodeset)
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return 0;
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if ((grub_strcmp (ctx->dirname, filename) == 0
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|| (info->case_insensitive
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&& grub_strcasecmp (ctx->dirname, filename) == 0)))
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{
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ctx->inode_found = info->inode;
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ctx->found = info->dir ? FOUND_DIR : FOUND_FILE;
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}
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return 0;
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}
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grub_err_t
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grub_mac_bless_inode (grub_device_t dev, grub_uint32_t inode, int is_dir,
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int intel)
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{
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grub_err_t err;
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union
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{
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struct grub_hfs_sblock hfs;
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struct grub_hfsplus_volheader hfsplus;
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} volheader;
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grub_disk_addr_t embedded_offset;
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if (intel && is_dir)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"can't bless a directory for mactel");
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if (!intel && !is_dir)
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return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
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"can't bless a file for mac PPC");
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/* Read the bootblock. */
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err = grub_disk_read (dev->disk, GRUB_HFSPLUS_SBLOCK, 0, sizeof (volheader),
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(char *) &volheader);
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if (err)
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return err;
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embedded_offset = 0;
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if (grub_be_to_cpu16 (volheader.hfs.magic) == GRUB_HFS_MAGIC)
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{
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int extent_start;
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int ablk_size;
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int ablk_start;
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/* See if there's an embedded HFS+ filesystem. */
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if (grub_be_to_cpu16 (volheader.hfs.embed_sig) != GRUB_HFSPLUS_MAGIC)
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{
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if (intel)
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volheader.hfs.intel_bootfile = grub_be_to_cpu32 (inode);
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else
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volheader.hfs.ppc_bootdir = grub_be_to_cpu32 (inode);
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return GRUB_ERR_NONE;
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}
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/* Calculate the offset needed to translate HFS+ sector numbers. */
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extent_start =
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grub_be_to_cpu16 (volheader.hfs.embed_extent.first_block);
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ablk_size = grub_be_to_cpu32 (volheader.hfs.blksz);
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ablk_start = grub_be_to_cpu16 (volheader.hfs.first_block);
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embedded_offset = (ablk_start
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+ extent_start
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* (ablk_size >> GRUB_DISK_SECTOR_BITS));
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err =
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grub_disk_read (dev->disk, embedded_offset + GRUB_HFSPLUS_SBLOCK, 0,
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sizeof (volheader), (char *) &volheader);
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if (err)
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return err;
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}
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if ((grub_be_to_cpu16 (volheader.hfsplus.magic) != GRUB_HFSPLUS_MAGIC)
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&& (grub_be_to_cpu16 (volheader.hfsplus.magic) != GRUB_HFSPLUSX_MAGIC))
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return grub_error (GRUB_ERR_BAD_FS, "not a HFS+ filesystem");
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if (intel)
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volheader.hfsplus.intel_bootfile = grub_be_to_cpu32 (inode);
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else
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volheader.hfsplus.ppc_bootdir = grub_be_to_cpu32 (inode);
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return grub_disk_write (dev->disk, embedded_offset + GRUB_HFSPLUS_SBLOCK, 0,
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sizeof (volheader), (char *) &volheader);
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}
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grub_err_t
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grub_mac_bless_file (grub_device_t dev, const char *path_in, int intel)
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{
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grub_fs_t fs;
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char *path, *tail;
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struct find_node_context ctx;
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fs = grub_fs_probe (dev);
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if (!fs || (grub_strcmp (fs->name, "hfsplus") != 0
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&& grub_strcmp (fs->name, "hfs") != 0))
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return grub_error (GRUB_ERR_BAD_FS, "no suitable FS found");
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path = grub_strdup (path_in);
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if (!path)
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return grub_errno;
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tail = path + grub_strlen (path) - 1;
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/* Remove trailing '/'. */
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while (tail != path && *tail == '/')
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*(tail--) = 0;
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tail = grub_strrchr (path, '/');
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ctx.found = 0;
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if (tail)
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{
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*tail = 0;
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ctx.dirname = tail + 1;
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(fs->dir) (dev, *path == 0 ? "/" : path, find_inode, &ctx);
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}
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else
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{
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ctx.dirname = path + 1;
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(fs->dir) (dev, "/", find_inode, &ctx);
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}
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if (!ctx.found)
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{
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grub_free (path);
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return grub_error (GRUB_ERR_FILE_NOT_FOUND, N_("file `%s' not found"),
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path_in);
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}
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grub_free (path);
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return grub_mac_bless_inode (dev, (grub_uint32_t) ctx.inode_found,
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(ctx.found == FOUND_DIR), intel);
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}
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static grub_err_t
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grub_cmd_macbless (grub_command_t cmd, int argc, char **args)
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{
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char *device_name;
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char *path = 0;
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grub_device_t dev;
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grub_err_t err;
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if (argc != 1)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_("one argument expected"));
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device_name = grub_file_get_device_name (args[0]);
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dev = grub_device_open (device_name);
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path = grub_strchr (args[0], ')');
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if (!path)
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path = args[0];
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else
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path = path + 1;
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if (!path || *path == 0 || !device_name)
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{
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if (dev)
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grub_device_close (dev);
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grub_free (device_name);
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grub_free (path);
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "invalid argument");
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}
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err = grub_mac_bless_file (dev, path, cmd->name[3] == 't');
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grub_device_close (dev);
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grub_free (device_name);
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return err;
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}
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static grub_command_t cmd, cmd_ppc;
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GRUB_MOD_INIT(macbless)
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{
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cmd = grub_register_command ("mactelbless", grub_cmd_macbless,
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N_("FILE"),
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N_
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("Bless FILE of HFS or HFS+ partition for intel macs."));
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cmd_ppc =
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grub_register_command ("macppcbless", grub_cmd_macbless, N_("DIR"),
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N_
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("Bless DIR of HFS or HFS+ partition for PPC macs."));
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}
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GRUB_MOD_FINI(macbless)
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{
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grub_unregister_command (cmd);
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grub_unregister_command (cmd_ppc);
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}
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