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2004-09-11 Marco Gerards <metgerards@student.han.nl>

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* 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.
This commit is contained in:
marco_g 2004-09-11 11:42:43 +00:00
parent 3c52136a94
commit 2c1f4ce368
8 changed files with 726 additions and 374 deletions
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29
ChangeLog
View file

@ -1,3 +1,32 @@
2004-09-11 Marco Gerards <metgerards@student.han.nl>
* 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.
2004-09-10 Yoshinori K. Okuji <okuji@enbug.org>
* normal/menu.c: Include grub/loader.h and grub/machine/time.h.

73
conf/i386-pc.mk
View file

@ -311,11 +311,11 @@ grub_mkimage_LDFLAGS = -llzo
grub_setup_SOURCES = util/i386/pc/grub-setup.c util/i386/pc/biosdisk.c \
util/misc.c util/i386/pc/getroot.c kern/device.c kern/disk.c \
kern/err.c kern/misc.c disk/i386/pc/partition.c fs/fat.c fs/ext2.c \
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c kern/file.c kern/fs.c kern/env.c
CLEANFILES += grub-setup grub_setup-util_i386_pc_grub_setup.o grub_setup-util_i386_pc_biosdisk.o grub_setup-util_misc.o grub_setup-util_i386_pc_getroot.o grub_setup-kern_device.o grub_setup-kern_disk.o grub_setup-kern_err.o grub_setup-kern_misc.o grub_setup-disk_i386_pc_partition.o grub_setup-fs_fat.o grub_setup-fs_ext2.o grub_setup-fs_ufs.o grub_setup-fs_minix.o grub_setup-fs_hfs.o grub_setup-fs_jfs.o grub_setup-kern_file.o grub_setup-kern_fs.o grub_setup-kern_env.o
MOSTLYCLEANFILES += grub_setup-util_i386_pc_grub_setup.d grub_setup-util_i386_pc_biosdisk.d grub_setup-util_misc.d grub_setup-util_i386_pc_getroot.d grub_setup-kern_device.d grub_setup-kern_disk.d grub_setup-kern_err.d grub_setup-kern_misc.d grub_setup-disk_i386_pc_partition.d grub_setup-fs_fat.d grub_setup-fs_ext2.d grub_setup-fs_ufs.d grub_setup-fs_minix.d grub_setup-fs_hfs.d grub_setup-fs_jfs.d grub_setup-kern_file.d grub_setup-kern_fs.d grub_setup-kern_env.d
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c kern/file.c kern/fs.c kern/env.c fs/fshelp.c
CLEANFILES += grub-setup grub_setup-util_i386_pc_grub_setup.o grub_setup-util_i386_pc_biosdisk.o grub_setup-util_misc.o grub_setup-util_i386_pc_getroot.o grub_setup-kern_device.o grub_setup-kern_disk.o grub_setup-kern_err.o grub_setup-kern_misc.o grub_setup-disk_i386_pc_partition.o grub_setup-fs_fat.o grub_setup-fs_ext2.o grub_setup-fs_ufs.o grub_setup-fs_minix.o grub_setup-fs_hfs.o grub_setup-fs_jfs.o grub_setup-kern_file.o grub_setup-kern_fs.o grub_setup-kern_env.o grub_setup-fs_fshelp.o
MOSTLYCLEANFILES += grub_setup-util_i386_pc_grub_setup.d grub_setup-util_i386_pc_biosdisk.d grub_setup-util_misc.d grub_setup-util_i386_pc_getroot.d grub_setup-kern_device.d grub_setup-kern_disk.d grub_setup-kern_err.d grub_setup-kern_misc.d grub_setup-disk_i386_pc_partition.d grub_setup-fs_fat.d grub_setup-fs_ext2.d grub_setup-fs_ufs.d grub_setup-fs_minix.d grub_setup-fs_hfs.d grub_setup-fs_jfs.d grub_setup-kern_file.d grub_setup-kern_fs.d grub_setup-kern_env.d grub_setup-fs_fshelp.d
grub-setup: grub_setup-util_i386_pc_grub_setup.o grub_setup-util_i386_pc_biosdisk.o grub_setup-util_misc.o grub_setup-util_i386_pc_getroot.o grub_setup-kern_device.o grub_setup-kern_disk.o grub_setup-kern_err.o grub_setup-kern_misc.o grub_setup-disk_i386_pc_partition.o grub_setup-fs_fat.o grub_setup-fs_ext2.o grub_setup-fs_ufs.o grub_setup-fs_minix.o grub_setup-fs_hfs.o grub_setup-fs_jfs.o grub_setup-kern_file.o grub_setup-kern_fs.o grub_setup-kern_env.o
grub-setup: grub_setup-util_i386_pc_grub_setup.o grub_setup-util_i386_pc_biosdisk.o grub_setup-util_misc.o grub_setup-util_i386_pc_getroot.o grub_setup-kern_device.o grub_setup-kern_disk.o grub_setup-kern_err.o grub_setup-kern_misc.o grub_setup-disk_i386_pc_partition.o grub_setup-fs_fat.o grub_setup-fs_ext2.o grub_setup-fs_ufs.o grub_setup-fs_minix.o grub_setup-fs_hfs.o grub_setup-fs_jfs.o grub_setup-kern_file.o grub_setup-kern_fs.o grub_setup-kern_env.o grub_setup-fs_fshelp.o
$(BUILD_CC) -o $@ $^ $(BUILD_LDFLAGS) $(grub_setup_LDFLAGS)
grub_setup-util_i386_pc_grub_setup.o: util/i386/pc/grub-setup.c
@ -462,9 +462,17 @@ grub_setup-kern_env.d: kern/env.c
-include grub_setup-kern_env.d
grub_setup-fs_fshelp.o: fs/fshelp.c
$(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_setup_CFLAGS) -c -o $@ $<
grub_setup-fs_fshelp.d: fs/fshelp.c
set -e; $(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_setup_CFLAGS) -M $< | sed 's,fshelp\.o[ :]*,grub_setup-fs_fshelp.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
-include grub_setup-fs_fshelp.d
# For grub
grub_emu_SOURCES = kern/main.c kern/device.c \
grub_emu_SOURCES = kern/main.c kern/device.c fs/fshelp.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
kern/misc.c kern/loader.c kern/rescue.c kern/term.c \
disk/i386/pc/partition.c kern/env.c commands/ls.c \
@ -472,10 +480,10 @@ grub_emu_SOURCES = kern/main.c kern/device.c \
util/i386/pc/biosdisk.c fs/fat.c fs/ext2.c fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c\
normal/cmdline.c normal/command.c normal/main.c normal/menu.c normal/arg.c \
util/console.c util/grub-emu.c util/misc.c util/i386/pc/getroot.c
CLEANFILES += grub-emu grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_i386_pc_partition.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o
MOSTLYCLEANFILES += grub_emu-kern_main.d grub_emu-kern_device.d grub_emu-kern_disk.d grub_emu-kern_dl.d grub_emu-kern_file.d grub_emu-kern_fs.d grub_emu-kern_err.d grub_emu-kern_misc.d grub_emu-kern_loader.d grub_emu-kern_rescue.d grub_emu-kern_term.d grub_emu-disk_i386_pc_partition.d grub_emu-kern_env.d grub_emu-commands_ls.d grub_emu-commands_terminal.d grub_emu-commands_boot.d grub_emu-commands_cmp.d grub_emu-commands_cat.d grub_emu-util_i386_pc_biosdisk.d grub_emu-fs_fat.d grub_emu-fs_ext2.d grub_emu-fs_ufs.d grub_emu-fs_minix.d grub_emu-fs_hfs.d grub_emu-fs_jfs.d grub_emu-normal_cmdline.d grub_emu-normal_command.d grub_emu-normal_main.d grub_emu-normal_menu.d grub_emu-normal_arg.d grub_emu-util_console.d grub_emu-util_grub_emu.d grub_emu-util_misc.d grub_emu-util_i386_pc_getroot.d
CLEANFILES += grub-emu grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-fs_fshelp.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_i386_pc_partition.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o
MOSTLYCLEANFILES += grub_emu-kern_main.d grub_emu-kern_device.d grub_emu-fs_fshelp.d grub_emu-kern_disk.d grub_emu-kern_dl.d grub_emu-kern_file.d grub_emu-kern_fs.d grub_emu-kern_err.d grub_emu-kern_misc.d grub_emu-kern_loader.d grub_emu-kern_rescue.d grub_emu-kern_term.d grub_emu-disk_i386_pc_partition.d grub_emu-kern_env.d grub_emu-commands_ls.d grub_emu-commands_terminal.d grub_emu-commands_boot.d grub_emu-commands_cmp.d grub_emu-commands_cat.d grub_emu-util_i386_pc_biosdisk.d grub_emu-fs_fat.d grub_emu-fs_ext2.d grub_emu-fs_ufs.d grub_emu-fs_minix.d grub_emu-fs_hfs.d grub_emu-fs_jfs.d grub_emu-normal_cmdline.d grub_emu-normal_command.d grub_emu-normal_main.d grub_emu-normal_menu.d grub_emu-normal_arg.d grub_emu-util_console.d grub_emu-util_grub_emu.d grub_emu-util_misc.d grub_emu-util_i386_pc_getroot.d
grub-emu: grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_i386_pc_partition.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o
grub-emu: grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-fs_fshelp.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_i386_pc_partition.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o
$(BUILD_CC) -o $@ $^ $(BUILD_LDFLAGS) $(grub_emu_LDFLAGS)
grub_emu-kern_main.o: kern/main.c
@ -494,6 +502,14 @@ grub_emu-kern_device.d: kern/device.c
-include grub_emu-kern_device.d
grub_emu-fs_fshelp.o: fs/fshelp.c
$(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_emu_CFLAGS) -c -o $@ $<
grub_emu-fs_fshelp.d: fs/fshelp.c
set -e; $(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_emu_CFLAGS) -M $< | sed 's,fshelp\.o[ :]*,grub_emu-fs_fshelp.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
-include grub_emu-fs_fshelp.d
grub_emu-kern_disk.o: kern/disk.c
$(BUILD_CC) -Ikern -I$(srcdir)/kern $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_emu_CFLAGS) -c -o $@ $<
@ -772,7 +788,7 @@ genmoddep-util_genmoddep.d: util/genmoddep.c
# Modules.
pkgdata_MODULES = _chain.mod _linux.mod fat.mod ufs.mod ext2.mod minix.mod \
hfs.mod jfs.mod normal.mod hello.mod vga.mod font.mod _multiboot.mod ls.mod \
boot.mod cmp.mod cat.mod terminal.mod
boot.mod cmp.mod cat.mod terminal.mod fshelp.mod
# For _chain.mod.
_chain_mod_SOURCES = loader/i386/pc/chainloader.c
@ -813,6 +829,45 @@ _chain_mod-loader_i386_pc_chainloader.d: loader/i386/pc/chainloader.c
_chain_mod_CFLAGS = $(COMMON_CFLAGS)
# For fshelp.mod.
fshelp_mod_SOURCES = fs/fshelp.c
CLEANFILES += fshelp.mod mod-fshelp.o mod-fshelp.c pre-fshelp.o fshelp_mod-fs_fshelp.o def-fshelp.lst und-fshelp.lst
MOSTLYCLEANFILES += fshelp_mod-fs_fshelp.d
DEFSYMFILES += def-fshelp.lst
UNDSYMFILES += und-fshelp.lst
fshelp.mod: pre-fshelp.o mod-fshelp.o
-rm -f $@
$(LD) -r -o $@ $^
$(STRIP) --strip-unneeded -K grub_mod_init -K grub_mod_fini -R .note -R .comment $@
pre-fshelp.o: fshelp_mod-fs_fshelp.o
-rm -f $@
$(LD) -r -o $@ $^
mod-fshelp.o: mod-fshelp.c
$(CC) $(CPPFLAGS) $(CFLAGS) $(fshelp_mod_CFLAGS) -c -o $@ $<
mod-fshelp.c: moddep.lst genmodsrc.sh
sh $(srcdir)/genmodsrc.sh 'fshelp' $< > $@ || (rm -f $@; exit 1)
def-fshelp.lst: pre-fshelp.o
$(NM) -g --defined-only -P -p $< | sed 's/^\([^ ]*\).*/\1 fshelp/' > $@
und-fshelp.lst: pre-fshelp.o
echo 'fshelp' > $@
$(NM) -u -P -p $< | cut -f1 -d' ' >> $@
fshelp_mod-fs_fshelp.o: fs/fshelp.c
$(CC) -Ifs -I$(srcdir)/fs $(CPPFLAGS) $(CFLAGS) $(fshelp_mod_CFLAGS) -c -o $@ $<
fshelp_mod-fs_fshelp.d: fs/fshelp.c
set -e; $(CC) -Ifs -I$(srcdir)/fs $(CPPFLAGS) $(CFLAGS) $(fshelp_mod_CFLAGS) -M $< | sed 's,fshelp\.o[ :]*,fshelp_mod-fs_fshelp.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
-include fshelp_mod-fs_fshelp.d
fshelp_mod_CFLAGS = $(COMMON_CFLAGS)
# For fat.mod.
fat_mod_SOURCES = fs/fat.c
CLEANFILES += fat.mod mod-fat.o mod-fat.c pre-fat.o fat_mod-fs_fat.o def-fat.lst und-fat.lst

10
conf/i386-pc.rmk
View file

@ -61,10 +61,10 @@ grub_mkimage_LDFLAGS = -llzo
grub_setup_SOURCES = util/i386/pc/grub-setup.c util/i386/pc/biosdisk.c \
util/misc.c util/i386/pc/getroot.c kern/device.c kern/disk.c \
kern/err.c kern/misc.c disk/i386/pc/partition.c fs/fat.c fs/ext2.c \
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c kern/file.c kern/fs.c kern/env.c
fs/ufs.c fs/minix.c fs/hfs.c fs/jfs.c kern/file.c kern/fs.c kern/env.c fs/fshelp.c
# For grub
grub_emu_SOURCES = kern/main.c kern/device.c \
grub_emu_SOURCES = kern/main.c kern/device.c fs/fshelp.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
kern/misc.c kern/loader.c kern/rescue.c kern/term.c \
disk/i386/pc/partition.c kern/env.c commands/ls.c \
@ -80,12 +80,16 @@ genmoddep_SOURCES = util/genmoddep.c
# Modules.
pkgdata_MODULES = _chain.mod _linux.mod fat.mod ufs.mod ext2.mod minix.mod \
hfs.mod jfs.mod normal.mod hello.mod vga.mod font.mod _multiboot.mod ls.mod \
boot.mod cmp.mod cat.mod terminal.mod
boot.mod cmp.mod cat.mod terminal.mod fshelp.mod
# For _chain.mod.
_chain_mod_SOURCES = loader/i386/pc/chainloader.c
_chain_mod_CFLAGS = $(COMMON_CFLAGS)
# For fshelp.mod.
fshelp_mod_SOURCES = fs/fshelp.c
fshelp_mod_CFLAGS = $(COMMON_CFLAGS)
# For fat.mod.
fat_mod_SOURCES = fs/fat.c
fat_mod_CFLAGS = $(COMMON_CFLAGS)

32
conf/powerpc-ieee1275.mk
View file

@ -24,17 +24,17 @@ noinst_UTILITIES = genmoddep
grub_emu_SOURCES = kern/main.c kern/device.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
kern/misc.c kern/loader.c kern/rescue.c kern/term.c \
disk/powerpc/ieee1275/partition.c \
disk/powerpc/ieee1275/partition.c fs/fshelp.c \
util/i386/pc/biosdisk.c fs/fat.c fs/ext2.c fs/ufs.c fs/minix.c fs/hfs.c \
fs/jfs.c normal/cmdline.c normal/command.c normal/main.c normal/menu.c \
normal/arg.c \
util/console.c util/grub-emu.c util/misc.c util/i386/pc/getroot.c \
kern/env.c commands/ls.c \
commands/terminal.c commands/boot.c commands/cmp.c commands/cat.c
CLEANFILES += grub-emu grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_powerpc_ieee1275_partition.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o
MOSTLYCLEANFILES += grub_emu-kern_main.d grub_emu-kern_device.d grub_emu-kern_disk.d grub_emu-kern_dl.d grub_emu-kern_file.d grub_emu-kern_fs.d grub_emu-kern_err.d grub_emu-kern_misc.d grub_emu-kern_loader.d grub_emu-kern_rescue.d grub_emu-kern_term.d grub_emu-disk_powerpc_ieee1275_partition.d grub_emu-util_i386_pc_biosdisk.d grub_emu-fs_fat.d grub_emu-fs_ext2.d grub_emu-fs_ufs.d grub_emu-fs_minix.d grub_emu-fs_hfs.d grub_emu-fs_jfs.d grub_emu-normal_cmdline.d grub_emu-normal_command.d grub_emu-normal_main.d grub_emu-normal_menu.d grub_emu-normal_arg.d grub_emu-util_console.d grub_emu-util_grub_emu.d grub_emu-util_misc.d grub_emu-util_i386_pc_getroot.d grub_emu-kern_env.d grub_emu-commands_ls.d grub_emu-commands_terminal.d grub_emu-commands_boot.d grub_emu-commands_cmp.d grub_emu-commands_cat.d
CLEANFILES += grub-emu grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_powerpc_ieee1275_partition.o grub_emu-fs_fshelp.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o
MOSTLYCLEANFILES += grub_emu-kern_main.d grub_emu-kern_device.d grub_emu-kern_disk.d grub_emu-kern_dl.d grub_emu-kern_file.d grub_emu-kern_fs.d grub_emu-kern_err.d grub_emu-kern_misc.d grub_emu-kern_loader.d grub_emu-kern_rescue.d grub_emu-kern_term.d grub_emu-disk_powerpc_ieee1275_partition.d grub_emu-fs_fshelp.d grub_emu-util_i386_pc_biosdisk.d grub_emu-fs_fat.d grub_emu-fs_ext2.d grub_emu-fs_ufs.d grub_emu-fs_minix.d grub_emu-fs_hfs.d grub_emu-fs_jfs.d grub_emu-normal_cmdline.d grub_emu-normal_command.d grub_emu-normal_main.d grub_emu-normal_menu.d grub_emu-normal_arg.d grub_emu-util_console.d grub_emu-util_grub_emu.d grub_emu-util_misc.d grub_emu-util_i386_pc_getroot.d grub_emu-kern_env.d grub_emu-commands_ls.d grub_emu-commands_terminal.d grub_emu-commands_boot.d grub_emu-commands_cmp.d grub_emu-commands_cat.d
grub-emu: grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_powerpc_ieee1275_partition.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o
grub-emu: grub_emu-kern_main.o grub_emu-kern_device.o grub_emu-kern_disk.o grub_emu-kern_dl.o grub_emu-kern_file.o grub_emu-kern_fs.o grub_emu-kern_err.o grub_emu-kern_misc.o grub_emu-kern_loader.o grub_emu-kern_rescue.o grub_emu-kern_term.o grub_emu-disk_powerpc_ieee1275_partition.o grub_emu-fs_fshelp.o grub_emu-util_i386_pc_biosdisk.o grub_emu-fs_fat.o grub_emu-fs_ext2.o grub_emu-fs_ufs.o grub_emu-fs_minix.o grub_emu-fs_hfs.o grub_emu-fs_jfs.o grub_emu-normal_cmdline.o grub_emu-normal_command.o grub_emu-normal_main.o grub_emu-normal_menu.o grub_emu-normal_arg.o grub_emu-util_console.o grub_emu-util_grub_emu.o grub_emu-util_misc.o grub_emu-util_i386_pc_getroot.o grub_emu-kern_env.o grub_emu-commands_ls.o grub_emu-commands_terminal.o grub_emu-commands_boot.o grub_emu-commands_cmp.o grub_emu-commands_cat.o
$(BUILD_CC) -o $@ $^ $(BUILD_LDFLAGS) $(grub_emu_LDFLAGS)
grub_emu-kern_main.o: kern/main.c
@ -133,6 +133,14 @@ grub_emu-disk_powerpc_ieee1275_partition.d: disk/powerpc/ieee1275/partition.c
-include grub_emu-disk_powerpc_ieee1275_partition.d
grub_emu-fs_fshelp.o: fs/fshelp.c
$(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_emu_CFLAGS) -c -o $@ $<
grub_emu-fs_fshelp.d: fs/fshelp.c
set -e; $(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_emu_CFLAGS) -M $< | sed 's,fshelp\.o[ :]*,grub_emu-fs_fshelp.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
-include grub_emu-fs_fshelp.d
grub_emu-util_i386_pc_biosdisk.o: util/i386/pc/biosdisk.c
$(BUILD_CC) -Iutil/i386/pc -I$(srcdir)/util/i386/pc $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grub_emu_CFLAGS) -c -o $@ $<
@ -313,7 +321,7 @@ grub_emu_LDFLAGS = -lncurses
grubof_SOURCES = boot/powerpc/ieee1275/cmain.c boot/powerpc/ieee1275/ieee1275.c \
boot/powerpc/ieee1275/crt0.S kern/main.c kern/device.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c fs/fshelp.c \
kern/misc.c kern/mm.c kern/loader.c kern/rescue.c kern/term.c \
kern/powerpc/ieee1275/init.c term/powerpc/ieee1275/ofconsole.c \
kern/powerpc/ieee1275/openfw.c fs/ext2.c fs/ufs.c fs/minix.c fs/hfs.c \
@ -321,10 +329,10 @@ grubof_SOURCES = boot/powerpc/ieee1275/cmain.c boot/powerpc/ieee1275/ieee1275.c
disk/powerpc/ieee1275/ofdisk.c disk/powerpc/ieee1275/partition.c \
kern/env.c normal/arg.c loader/powerpc/ieee1275/linux.c \
loader/powerpc/ieee1275/linux_normal.c commands/boot.c
CLEANFILES += grubof grubof-boot_powerpc_ieee1275_cmain.o grubof-boot_powerpc_ieee1275_ieee1275.o grubof-boot_powerpc_ieee1275_crt0.o grubof-kern_main.o grubof-kern_device.o grubof-kern_disk.o grubof-kern_dl.o grubof-kern_file.o grubof-kern_fs.o grubof-kern_err.o grubof-kern_misc.o grubof-kern_mm.o grubof-kern_loader.o grubof-kern_rescue.o grubof-kern_term.o grubof-kern_powerpc_ieee1275_init.o grubof-term_powerpc_ieee1275_ofconsole.o grubof-kern_powerpc_ieee1275_openfw.o grubof-fs_ext2.o grubof-fs_ufs.o grubof-fs_minix.o grubof-fs_hfs.o grubof-fs_jfs.o grubof-normal_cmdline.o grubof-normal_command.o grubof-normal_main.o grubof-normal_menu.o grubof-disk_powerpc_ieee1275_ofdisk.o grubof-disk_powerpc_ieee1275_partition.o grubof-kern_env.o grubof-normal_arg.o grubof-loader_powerpc_ieee1275_linux.o grubof-loader_powerpc_ieee1275_linux_normal.o grubof-commands_boot.o
MOSTLYCLEANFILES += grubof-boot_powerpc_ieee1275_cmain.d grubof-boot_powerpc_ieee1275_ieee1275.d grubof-boot_powerpc_ieee1275_crt0.d grubof-kern_main.d grubof-kern_device.d grubof-kern_disk.d grubof-kern_dl.d grubof-kern_file.d grubof-kern_fs.d grubof-kern_err.d grubof-kern_misc.d grubof-kern_mm.d grubof-kern_loader.d grubof-kern_rescue.d grubof-kern_term.d grubof-kern_powerpc_ieee1275_init.d grubof-term_powerpc_ieee1275_ofconsole.d grubof-kern_powerpc_ieee1275_openfw.d grubof-fs_ext2.d grubof-fs_ufs.d grubof-fs_minix.d grubof-fs_hfs.d grubof-fs_jfs.d grubof-normal_cmdline.d grubof-normal_command.d grubof-normal_main.d grubof-normal_menu.d grubof-disk_powerpc_ieee1275_ofdisk.d grubof-disk_powerpc_ieee1275_partition.d grubof-kern_env.d grubof-normal_arg.d grubof-loader_powerpc_ieee1275_linux.d grubof-loader_powerpc_ieee1275_linux_normal.d grubof-commands_boot.d
CLEANFILES += grubof grubof-boot_powerpc_ieee1275_cmain.o grubof-boot_powerpc_ieee1275_ieee1275.o grubof-boot_powerpc_ieee1275_crt0.o grubof-kern_main.o grubof-kern_device.o grubof-kern_disk.o grubof-kern_dl.o grubof-kern_file.o grubof-kern_fs.o grubof-kern_err.o grubof-fs_fshelp.o grubof-kern_misc.o grubof-kern_mm.o grubof-kern_loader.o grubof-kern_rescue.o grubof-kern_term.o grubof-kern_powerpc_ieee1275_init.o grubof-term_powerpc_ieee1275_ofconsole.o grubof-kern_powerpc_ieee1275_openfw.o grubof-fs_ext2.o grubof-fs_ufs.o grubof-fs_minix.o grubof-fs_hfs.o grubof-fs_jfs.o grubof-normal_cmdline.o grubof-normal_command.o grubof-normal_main.o grubof-normal_menu.o grubof-disk_powerpc_ieee1275_ofdisk.o grubof-disk_powerpc_ieee1275_partition.o grubof-kern_env.o grubof-normal_arg.o grubof-loader_powerpc_ieee1275_linux.o grubof-loader_powerpc_ieee1275_linux_normal.o grubof-commands_boot.o
MOSTLYCLEANFILES += grubof-boot_powerpc_ieee1275_cmain.d grubof-boot_powerpc_ieee1275_ieee1275.d grubof-boot_powerpc_ieee1275_crt0.d grubof-kern_main.d grubof-kern_device.d grubof-kern_disk.d grubof-kern_dl.d grubof-kern_file.d grubof-kern_fs.d grubof-kern_err.d grubof-fs_fshelp.d grubof-kern_misc.d grubof-kern_mm.d grubof-kern_loader.d grubof-kern_rescue.d grubof-kern_term.d grubof-kern_powerpc_ieee1275_init.d grubof-term_powerpc_ieee1275_ofconsole.d grubof-kern_powerpc_ieee1275_openfw.d grubof-fs_ext2.d grubof-fs_ufs.d grubof-fs_minix.d grubof-fs_hfs.d grubof-fs_jfs.d grubof-normal_cmdline.d grubof-normal_command.d grubof-normal_main.d grubof-normal_menu.d grubof-disk_powerpc_ieee1275_ofdisk.d grubof-disk_powerpc_ieee1275_partition.d grubof-kern_env.d grubof-normal_arg.d grubof-loader_powerpc_ieee1275_linux.d grubof-loader_powerpc_ieee1275_linux_normal.d grubof-commands_boot.d
grubof: grubof-boot_powerpc_ieee1275_cmain.o grubof-boot_powerpc_ieee1275_ieee1275.o grubof-boot_powerpc_ieee1275_crt0.o grubof-kern_main.o grubof-kern_device.o grubof-kern_disk.o grubof-kern_dl.o grubof-kern_file.o grubof-kern_fs.o grubof-kern_err.o grubof-kern_misc.o grubof-kern_mm.o grubof-kern_loader.o grubof-kern_rescue.o grubof-kern_term.o grubof-kern_powerpc_ieee1275_init.o grubof-term_powerpc_ieee1275_ofconsole.o grubof-kern_powerpc_ieee1275_openfw.o grubof-fs_ext2.o grubof-fs_ufs.o grubof-fs_minix.o grubof-fs_hfs.o grubof-fs_jfs.o grubof-normal_cmdline.o grubof-normal_command.o grubof-normal_main.o grubof-normal_menu.o grubof-disk_powerpc_ieee1275_ofdisk.o grubof-disk_powerpc_ieee1275_partition.o grubof-kern_env.o grubof-normal_arg.o grubof-loader_powerpc_ieee1275_linux.o grubof-loader_powerpc_ieee1275_linux_normal.o grubof-commands_boot.o
grubof: grubof-boot_powerpc_ieee1275_cmain.o grubof-boot_powerpc_ieee1275_ieee1275.o grubof-boot_powerpc_ieee1275_crt0.o grubof-kern_main.o grubof-kern_device.o grubof-kern_disk.o grubof-kern_dl.o grubof-kern_file.o grubof-kern_fs.o grubof-kern_err.o grubof-fs_fshelp.o grubof-kern_misc.o grubof-kern_mm.o grubof-kern_loader.o grubof-kern_rescue.o grubof-kern_term.o grubof-kern_powerpc_ieee1275_init.o grubof-term_powerpc_ieee1275_ofconsole.o grubof-kern_powerpc_ieee1275_openfw.o grubof-fs_ext2.o grubof-fs_ufs.o grubof-fs_minix.o grubof-fs_hfs.o grubof-fs_jfs.o grubof-normal_cmdline.o grubof-normal_command.o grubof-normal_main.o grubof-normal_menu.o grubof-disk_powerpc_ieee1275_ofdisk.o grubof-disk_powerpc_ieee1275_partition.o grubof-kern_env.o grubof-normal_arg.o grubof-loader_powerpc_ieee1275_linux.o grubof-loader_powerpc_ieee1275_linux_normal.o grubof-commands_boot.o
$(BUILD_CC) -o $@ $^ $(BUILD_LDFLAGS) $(grubof_LDFLAGS)
grubof-boot_powerpc_ieee1275_cmain.o: boot/powerpc/ieee1275/cmain.c
@ -407,6 +415,14 @@ grubof-kern_err.d: kern/err.c
-include grubof-kern_err.d
grubof-fs_fshelp.o: fs/fshelp.c
$(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grubof_CFLAGS) -c -o $@ $<
grubof-fs_fshelp.d: fs/fshelp.c
set -e; $(BUILD_CC) -Ifs -I$(srcdir)/fs $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grubof_CFLAGS) -M $< | sed 's,fshelp\.o[ :]*,grubof-fs_fshelp.o $@ : ,g' > $@; [ -s $@ ] || rm -f $@
-include grubof-fs_fshelp.d
grubof-kern_misc.o: kern/misc.c
$(BUILD_CC) -Ikern -I$(srcdir)/kern $(BUILD_CPPFLAGS) $(BUILD_CFLAGS) -DGRUB_UTIL=1 $(grubof_CFLAGS) -c -o $@ $<

4
conf/powerpc-ieee1275.rmk
View file

@ -24,7 +24,7 @@ noinst_UTILITIES = genmoddep
grub_emu_SOURCES = kern/main.c kern/device.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
kern/misc.c kern/loader.c kern/rescue.c kern/term.c \
disk/powerpc/ieee1275/partition.c \
disk/powerpc/ieee1275/partition.c fs/fshelp.c \
util/i386/pc/biosdisk.c fs/fat.c fs/ext2.c fs/ufs.c fs/minix.c fs/hfs.c \
fs/jfs.c normal/cmdline.c normal/command.c normal/main.c normal/menu.c \
normal/arg.c \
@ -35,7 +35,7 @@ grub_emu_LDFLAGS = -lncurses
grubof_SOURCES = boot/powerpc/ieee1275/cmain.c boot/powerpc/ieee1275/ieee1275.c \
boot/powerpc/ieee1275/crt0.S kern/main.c kern/device.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c \
kern/disk.c kern/dl.c kern/file.c kern/fs.c kern/err.c fs/fshelp.c \
kern/misc.c kern/mm.c kern/loader.c kern/rescue.c kern/term.c \
kern/powerpc/ieee1275/init.c term/powerpc/ieee1275/ofconsole.c \
kern/powerpc/ieee1275/openfw.c fs/ext2.c fs/ufs.c fs/minix.c fs/hfs.c \

585
fs/ext2.c
View file

@ -29,11 +29,13 @@
/* Filetype used in directory entry. */
#define FILETYPE_UNKNOWN 0
#define FILETYPE_REG 1
#define FILETYPE_DIRECTORY 2
#define FILETYPE_SYMLINK 7
/* Filetype information as used in inodes. */
#define FILETYPE_INO_MASK 0170000
#define FILETYPE_INO_REG 0100000
#define FILETYPE_INO_DIRECTORY 0040000
#define FILETYPE_INO_SYMLINK 0120000
@ -44,6 +46,7 @@
#include <grub/disk.h>
#include <grub/dl.h>
#include <grub/types.h>
#include <grub/fshelp.h>
/* Log2 size of ext2 block in 512 blocks. */
#define LOG2_EXT2_BLOCK_SIZE(data) \
@ -57,7 +60,7 @@
#define EXT2_BLOCK_SIZE(data) (1 << LOG2_BLOCK_SIZE(data))
/* The ext2 superblock. */
struct grub_ext_sblock
struct grub_ext2_sblock
{
grub_uint32_t total_inodes;
grub_uint32_t total_blocks;
@ -97,7 +100,7 @@ struct grub_ext_sblock
};
/* The ext2 blockgroup. */
struct ext2_block_group
struct grub_ext2_block_group
{
grub_uint32_t block_id;
grub_uint32_t inode_id;
@ -150,12 +153,21 @@ struct ext2_dirent
grub_uint8_t filetype;
};
struct grub_fshelp_node
{
struct grub_ext2_data *data;
struct grub_ext2_inode inode;
int ino;
int inode_read;
};
/* Information about a "mounted" ext2 filesystem. */
struct grub_ext2_data
{
struct grub_ext_sblock sblock;
struct grub_ext2_sblock sblock;
grub_disk_t disk;
struct grub_ext2_inode inode;
struct grub_ext2_inode *inode;
struct grub_fshelp_node diropen;
};
#ifndef GRUB_UTIL
@ -166,60 +178,59 @@ static grub_dl_t my_mod;
the mounted filesystem DATA. */
inline static grub_err_t
grub_ext2_blockgroup (struct grub_ext2_data *data, int group,
struct ext2_block_group *blkgrp)
struct grub_ext2_block_group *blkgrp)
{
return grub_disk_read (data->disk,
return grub_disk_read (data->disk,
((grub_le_to_cpu32 (data->sblock.first_data_block) + 1)
<< LOG2_EXT2_BLOCK_SIZE (data)),
group * sizeof (struct ext2_block_group),
sizeof (struct ext2_block_group), (char *) blkgrp);
group * sizeof (struct grub_ext2_block_group),
sizeof (struct grub_ext2_block_group), (char *) blkgrp);
}
/* Return in BLOCK the on disk block number of block FILEBLOCK in the
opened file descibed by DATA. If this block is not stored on disk
in case of a sparse file return 0. */
static grub_err_t
grub_ext2_get_file_block (struct grub_ext2_data *data,
int fileblock, int *block)
{
int blknr;
struct grub_ext2_inode *inode = &data->inode;
static int
grub_ext2_read_block (grub_fshelp_node_t node, int fileblock)
{
struct grub_ext2_data *data = node->data;
struct grub_ext2_inode *inode = &node->inode;
int blknr;
int blksz = EXT2_BLOCK_SIZE (data);
int log2_blksz = LOG2_EXT2_BLOCK_SIZE (data);
/* Direct blocks. */
if (fileblock < INDIRECT_BLOCKS)
blknr = grub_le_to_cpu32 (inode->blocks.dir_blocks[fileblock]);
/* Indirect. */
else if (fileblock < INDIRECT_BLOCKS + EXT2_BLOCK_SIZE (data) / 4)
else if (fileblock < INDIRECT_BLOCKS + blksz / 4)
{
grub_uint32_t indir[EXT2_BLOCK_SIZE (data) / 4];
grub_uint32_t indir[blksz / 4];
if (grub_disk_read (data->disk,
grub_le_to_cpu32 (inode->blocks.indir_block)
<< LOG2_EXT2_BLOCK_SIZE (data),
0, EXT2_BLOCK_SIZE (data), (char *) indir))
<< log2_blksz,
0, blksz, (char *) indir))
return grub_errno;
blknr = grub_le_to_cpu32 (indir[fileblock - INDIRECT_BLOCKS]);
}
/* Double indirect. */
else if (fileblock < INDIRECT_BLOCKS + EXT2_BLOCK_SIZE (data) / 4
* (EXT2_BLOCK_SIZE (data) / 4 + 1))
else if (fileblock < INDIRECT_BLOCKS + blksz / 4 * (blksz / 4 + 1))
{
unsigned int perblock = EXT2_BLOCK_SIZE (data) / 4;
unsigned int perblock = blksz / 4;
unsigned int rblock = fileblock - (INDIRECT_BLOCKS
+ EXT2_BLOCK_SIZE (data) / 4);
grub_uint32_t indir[EXT2_BLOCK_SIZE (data) / 4];
+ blksz / 4);
grub_uint32_t indir[blksz / 4];
if (grub_disk_read (data->disk,
grub_le_to_cpu32 (inode->blocks.double_indir_block)
<< LOG2_EXT2_BLOCK_SIZE (data),
0, EXT2_BLOCK_SIZE (data), (char *) indir))
<< log2_blksz,
0, blksz, (char *) indir))
return grub_errno;
if (grub_disk_read (data->disk,
grub_le_to_cpu32 (indir[rblock / perblock])
<< LOG2_EXT2_BLOCK_SIZE (data),
0, EXT2_BLOCK_SIZE (data), (char *) indir))
<< log2_blksz,
0, blksz, (char *) indir))
return grub_errno;
@ -233,78 +244,23 @@ grub_ext2_get_file_block (struct grub_ext2_data *data,
return grub_errno;
}
*block = blknr;
return 0;
return blknr;
}
/* Read LEN bytes from the file described by DATA starting with byte
POS. Return the amount of read bytes in READ. */
static grub_ssize_t
grub_ext2_read_file (struct grub_ext2_data *data,
grub_ext2_read_file (grub_fshelp_node_t node,
void (*read_hook) (unsigned long sector,
unsigned offset, unsigned length),
int pos, unsigned int len, char *buf)
{
int i;
int blockcnt;
/* Adjust len so it we can't read past the end of the file. */
if (len > grub_le_to_cpu32 (data->inode.size))
len = grub_le_to_cpu32 (data->inode.size);
blockcnt = ((len + pos)
+ EXT2_BLOCK_SIZE (data) - 1) / EXT2_BLOCK_SIZE (data);
for (i = pos / EXT2_BLOCK_SIZE (data); i < blockcnt; i++)
{
int blknr;
int blockoff = pos % EXT2_BLOCK_SIZE (data);
int blockend = EXT2_BLOCK_SIZE (data);
int skipfirst = 0;
grub_ext2_get_file_block (data, i, &blknr);
if (grub_errno)
return -1;
blknr = blknr << LOG2_EXT2_BLOCK_SIZE (data);
/* Last block. */
if (i == blockcnt - 1)
{
blockend = (len + pos) % EXT2_BLOCK_SIZE (data);
/* The last portion is exactly EXT2_BLOCK_SIZE (data). */
if (!blockend)
blockend = EXT2_BLOCK_SIZE (data);
}
/* First block. */
if (i == pos / EXT2_BLOCK_SIZE (data))
{
skipfirst = blockoff;
blockend -= skipfirst;
}
/* If the block number is 0 this block is not stored on disk but
is zero filled instead. */
if (blknr)
{
data->disk->read_hook = read_hook;
grub_disk_read (data->disk, blknr, skipfirst,
blockend, buf);
data->disk->read_hook = 0;
if (grub_errno)
return -1;
}
else
grub_memset (buf, EXT2_BLOCK_SIZE (data) - skipfirst, 0);
buf += EXT2_BLOCK_SIZE (data) - skipfirst;
}
return len;
return grub_fshelp_read_file (node->data->disk, node, read_hook,
pos, len, buf, grub_ext2_read_block,
node->inode.size,
LOG2_EXT2_BLOCK_SIZE (node->data));
}
@ -313,8 +269,8 @@ static grub_err_t
grub_ext2_read_inode (struct grub_ext2_data *data,
int ino, struct grub_ext2_inode *inode)
{
struct ext2_block_group blkgrp;
struct grub_ext_sblock *sblock = &data->sblock;
struct grub_ext2_block_group blkgrp;
struct grub_ext2_sblock *sblock = &data->sblock;
int inodes_per_block;
unsigned int blkno;
@ -355,7 +311,7 @@ grub_ext2_mount (grub_disk_t disk)
return 0;
/* Read the superblock. */
grub_disk_read (disk, 1 * 2, 0, sizeof (struct grub_ext_sblock),
grub_disk_read (disk, 1 * 2, 0, sizeof (struct grub_ext2_sblock),
(char *) &data->sblock);
if (grub_errno)
goto fail;
@ -364,7 +320,17 @@ grub_ext2_mount (grub_disk_t disk)
if (grub_le_to_cpu16 (data->sblock.magic) != EXT2_MAGIC)
goto fail;
data->diropen.data = data;
data->diropen.ino = 2;
data->diropen.inode_read = 1;
data->inode = &data->diropen.inode;
data->disk = disk;
grub_ext2_read_inode (data, 2, data->inode);
if (grub_errno)
goto fail;
return data;
fail:
@ -373,198 +339,137 @@ grub_ext2_mount (grub_disk_t disk)
return 0;
}
/* Find the file with the pathname PATH on the filesystem described by
DATA. Return its inode number in INO. */
static grub_err_t
grub_ext2_find_file (struct grub_ext2_data *data, const char *path, int *ino)
static char *
grub_ext2_read_symlink (grub_fshelp_node_t node)
{
int blocksize = EXT2_BLOCK_SIZE (data)
<< grub_le_to_cpu32 (data->sblock.log2_block_size);
struct grub_ext2_inode *inode = &data->inode;
int currinode = 2;
int symlinkcnt = 0;
char fpath[EXT2_PATH_MAX];
char *name = fpath;
grub_strncpy (fpath, path, EXT2_PATH_MAX);
if (!name || name[0] != '/')
char *symlink;
struct grub_fshelp_node *diro = node;
if (!diro->inode_read)
{
grub_error (GRUB_ERR_BAD_FILENAME, "bad filename");
return grub_errno;
}
/* Skip the first slash. */
name++;
if (!*name)
{
*ino = 2;
return 0;
}
/* Remove trailing "/". */
if (name[grub_strlen (name) - 1] =='/')
name[grub_strlen (name) - 1] = '\0';
while (*name)
{
unsigned int fpos = 0;
char *next;
int namesize;
/* Extract the actual part from the pathname. */
next = grub_strchr (name, '/');
if (next)
{
next[0] = '\0';
next++;
}
namesize = grub_strlen (name);
/* Open the file. */
grub_ext2_read_inode (data, currinode, inode);
grub_ext2_read_inode (diro->data, diro->ino, &diro->inode);
if (grub_errno)
return 0;
}
symlink = grub_malloc (grub_le_to_cpu32 (diro->inode.size) + 1);
if (!symlink)
return 0;
/* If the filesize of the symlink is bigger than
60 the symlink is stored in a separate block,
otherwise it is stored in the inode. */
if (grub_le_to_cpu32 (diro->inode.size) <= 60)
grub_strncpy (symlink,
diro->inode.symlink,
grub_le_to_cpu32 (diro->inode.size));
else
{
grub_ext2_read_file (diro, 0, 0,
grub_le_to_cpu32 (diro->inode.size),
symlink);
if (grub_errno)
goto fail;
/* Search the file. */
while (fpos < grub_le_to_cpu32 (inode->size))
{
struct ext2_dirent dirent;
/* Read the directory entry. */
grub_ext2_read_file (data, 0, fpos, sizeof (struct ext2_dirent),
(char *) &dirent);
if (grub_errno)
goto fail;
if (dirent.namelen != 0)
{
char filename[dirent.namelen + 1];
/* Read the filename part of this directory entry. */
grub_ext2_read_file (data, 0, fpos
+ sizeof (struct ext2_dirent),
dirent.namelen, filename);
if (grub_errno)
goto fail;
filename[dirent.namelen] = '\0';
/* Check if the current directory entry described the
file we are looking for. */
if (dirent.namelen == namesize
&& !grub_strncmp (name, filename, namesize))
{
/* Stat the inode. */
grub_ext2_read_inode (data,
grub_le_to_cpu32 (dirent.inode),
inode);
/* If this is a symlink, follow it. */
if ((grub_le_to_cpu16 (data->inode.mode)
& FILETYPE_INO_MASK) == FILETYPE_INO_SYMLINK)
{
/* XXX: Use malloc instead? */
char symlink[blocksize];
if (++symlinkcnt == EXT2_MAX_SYMLINKCNT)
{
grub_error (GRUB_ERR_SYMLINK_LOOP,
"too deep nesting of symlinks");
goto fail;
}
/* If the filesize of the symlink is bigger than
60 the symlink is stored in a separate block,
otherwise it is stored in the inode. */
if (grub_le_to_cpu32 (inode->size) <= 60)
grub_strncpy (symlink,
inode->symlink,
grub_le_to_cpu32 (inode->size));
else
{
grub_ext2_read_file (data, 0, 0,
grub_le_to_cpu32 (inode->size),
symlink);
if (grub_errno)
goto fail;
}
symlink[grub_le_to_cpu32 (inode->size)] = '\0';
/* Check if the symlink is absolute or relative. */
if (symlink[0] == '/')
{
grub_strncpy (fpath, symlink + 1, EXT2_PATH_MAX);
name = fpath;
currinode = 2;
}
else
{
char *bak = 0;
if (next)
{
bak = grub_strdup (next);
if (!bak)
goto fail;
}
/* Relative symlink, construct the new path. */
grub_strcpy (fpath, symlink);
name = fpath;
if (next)
{
grub_strcat (name, "/");
grub_strcat (name, bak);
grub_free (bak);
}
}
fpos = 0;
break;
}
if (next)
{
currinode = grub_le_to_cpu32 (dirent.inode);
name = next;
if ((grub_le_to_cpu16 (data->inode.mode)
& FILETYPE_INO_MASK) != FILETYPE_INO_DIRECTORY)
{
grub_error (GRUB_ERR_BAD_FILE_TYPE,
"not a directory");
goto fail;
}
break;
}
else /* Found it! */
{
*ino = grub_le_to_cpu32 (dirent.inode);
return 0;
}
}
}
/* Move to next directory entry. */
fpos += grub_le_to_cpu16 (dirent.direntlen);
}
/* The complete directory was read and no matching file was
found. */
if (fpos >= grub_le_to_cpu32 (inode->size))
{
grub_error (GRUB_ERR_FILE_NOT_FOUND, "file not found");
goto fail;
grub_free (symlink);
return 0;
}
}
symlink[grub_le_to_cpu32 (diro->inode.size)] = '\0';
return symlink;
}
fail:
return grub_errno;
static int
grub_ext2_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))
{
unsigned int fpos = 0;
struct grub_fshelp_node *diro = (struct grub_fshelp_node *) dir;
if (!diro->inode_read)
{
grub_ext2_read_inode (diro->data, diro->ino, &diro->inode);
if (grub_errno)
return 0;
}
/* Search the file. */
while (fpos < grub_le_to_cpu32 (diro->inode.size))
{
struct ext2_dirent dirent;
grub_ext2_read_file (diro, 0, fpos, sizeof (struct ext2_dirent),
(char *) &dirent);
if (grub_errno)
return 0;
if (dirent.namelen != 0)
{
char filename[dirent.namelen + 1];
struct grub_fshelp_node *fdiro;
enum grub_fshelp_filetype type = GRUB_FSHELP_UNKNOWN;
grub_ext2_read_file (diro, 0, fpos + sizeof (struct ext2_dirent),
dirent.namelen, filename);
if (grub_errno)
return 0;
fdiro = grub_malloc (sizeof (struct grub_fshelp_node));
if (!fdiro)
return 0;
fdiro->data = diro->data;
fdiro->ino = grub_le_to_cpu32 (dirent.inode);
filename[dirent.namelen] = '\0';
if (dirent.filetype != FILETYPE_UNKNOWN)
{
fdiro->inode_read = 0;
if (dirent.filetype == FILETYPE_DIRECTORY)
type = GRUB_FSHELP_DIR;
else if (dirent.filetype == FILETYPE_SYMLINK)
type = GRUB_FSHELP_SYMLINK;
else if (dirent.filetype == FILETYPE_REG)
type = GRUB_FSHELP_REG;
}
else
{
/* The filetype can not be read from the dirent, read
the inode to get more information. */
grub_ext2_read_inode (diro->data, grub_le_to_cpu32 (dirent.inode),
&fdiro->inode);
if (grub_errno)
{
grub_free (fdiro);
return 0;
}
fdiro->inode_read = 1;
if ((grub_le_to_cpu16 (diro->inode.mode)
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)
type = GRUB_FSHELP_DIR;
else if ((grub_le_to_cpu16 (diro->inode.mode)
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)
type = GRUB_FSHELP_SYMLINK;
else if ((grub_le_to_cpu16 (diro->inode.mode)
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY)
type = GRUB_FSHELP_REG;
}
if (hook (filename, type, fdiro))
return 1;
}
fpos += grub_le_to_cpu16 (dirent.direntlen);
}
return 0;
}
/* Open a file named NAME and initialize FILE. */
@ -572,40 +477,42 @@ static grub_err_t
grub_ext2_open (struct grub_file *file, const char *name)
{
struct grub_ext2_data *data;
int ino;
struct grub_fshelp_node *fdiro = 0;
#ifndef GRUB_UTIL
grub_dl_ref (my_mod);
#endif
data = grub_ext2_mount (file->device->disk);
if (!data)
goto fail;
grub_ext2_find_file (data, name, &ino);
grub_fshelp_find_file (name, &data->diropen, &fdiro, grub_ext2_iterate_dir,
grub_ext2_read_symlink, GRUB_FSHELP_REG);
if (grub_errno)
goto fail;
grub_ext2_read_inode (data, ino, &data->inode);
if (grub_errno)
goto fail;
if (!(grub_le_to_cpu16 (data->inode.mode) & 0100000))
if (!fdiro->inode_read)
{
grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a regular file");
goto fail;
grub_ext2_read_inode (data, fdiro->ino, &fdiro->inode);
if (grub_errno)
goto fail;
}
file->size = grub_le_to_cpu32 (data->inode.size);
grub_memcpy (data->inode, &fdiro->inode, sizeof (struct grub_ext2_inode));
grub_free (fdiro);
file->size = grub_le_to_cpu32 (data->inode->size);
file->data = data;
file->offset = 0;
return 0;
fail:
grub_free (data);
if (fdiro != &data->diropen)
grub_free (fdiro);
#ifndef GRUB_UTIL
grub_dl_unref (my_mod);
#endif
@ -632,7 +539,8 @@ grub_ext2_read (grub_file_t file, char *buf, grub_ssize_t len)
struct grub_ext2_data *data =
(struct grub_ext2_data *) file->data;
return grub_ext2_read_file (data, file->read_hook, file->offset, len, buf);
return grub_ext2_read_file (&data->diropen, file->read_hook,
file->offset, len, buf);
}
@ -641,10 +549,26 @@ grub_ext2_dir (grub_device_t device, const char *path,
int (*hook) (const char *filename, int dir))
{
struct grub_ext2_data *data = 0;;
int ino;
unsigned int fpos = 0;
struct grub_fshelp_node *fdiro = 0;
auto int NESTED_FUNC_ATTR iterate (const char *filename,
enum grub_fshelp_filetype filetype,
grub_fshelp_node_t node);
int NESTED_FUNC_ATTR iterate (const char *filename,
enum grub_fshelp_filetype filetype,
grub_fshelp_node_t node)
{
grub_free (node);
if (filetype == GRUB_FSHELP_DIR)
return hook (filename, 1);
else
return hook (filename, 0);
return 0;
}
#ifndef GRUB_UTIL
grub_dl_ref (my_mod);
#endif
@ -652,61 +576,18 @@ grub_ext2_dir (grub_device_t device, const char *path,
data = grub_ext2_mount (device->disk);
if (!data)
goto fail;
grub_ext2_find_file (data, (char *) path, &ino);
grub_fshelp_find_file (path, &data->diropen, &fdiro, grub_ext2_iterate_dir,
grub_ext2_read_symlink, GRUB_FSHELP_DIR);
if (grub_errno)
goto fail;
grub_ext2_read_inode (data, ino, &data->inode);
if (grub_errno)
goto fail;
if ((grub_le_to_cpu16 (data->inode.mode)
& FILETYPE_INO_MASK) != FILETYPE_INO_DIRECTORY)
{
grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
goto fail;
}
/* Search the file. */
while (fpos < grub_le_to_cpu32 (data->inode.size))
{
struct ext2_dirent dirent;
grub_ext2_read_file (data, 0, fpos, sizeof (struct ext2_dirent),
(char *) &dirent);
if (grub_errno)
goto fail;
if (dirent.namelen != 0)
{
char filename[dirent.namelen + 1];
grub_ext2_read_file (data, 0, fpos + sizeof (struct ext2_dirent),
dirent.namelen, filename);
if (grub_errno)
goto fail;
filename[dirent.namelen] = '\0';
if (dirent.filetype != FILETYPE_UNKNOWN)
hook (filename, dirent.filetype == FILETYPE_DIRECTORY);
else
{
struct grub_ext2_inode inode;
grub_ext2_read_inode (data, grub_le_to_cpu32 (dirent.inode), &inode);
hook (filename, (grub_le_to_cpu16 (inode.mode)
& FILETYPE_INO_MASK) == FILETYPE_INO_DIRECTORY);
}
}
fpos += grub_le_to_cpu16 (dirent.direntlen);
}
return grub_errno;
grub_ext2_iterate_dir (fdiro, iterate);
fail:
grub_free (data);
if (fdiro != &data->diropen)
grub_free (fdiro);
#ifndef GRUB_UTIL
grub_dl_unref (my_mod);

292
fs/fshelp.c Normal file
View file

@ -0,0 +1,292 @@
/* fshelp.c -- Filesystem helper functions */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2004 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <grub/err.h>
#include <grub/mm.h>
#include <grub/misc.h>
#include <grub/disk.h>
#include <grub/fshelp.h>
/* 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
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 expecttype)
{
grub_err_t err;
enum grub_fshelp_filetype foundtype = GRUB_FSHELP_DIR;
int symlinknest = 0;
auto grub_err_t NESTED_FUNC_ATTR find_file (const char *currpath,
grub_fshelp_node_t currroot,
grub_fshelp_node_t *currfound);
grub_err_t NESTED_FUNC_ATTR find_file (const char *currpath,
grub_fshelp_node_t currroot,
grub_fshelp_node_t *currfound)
{
char fpath[grub_strlen (currpath) + 1];
char *name = fpath;
char *next;
// unsigned int pos = 0;
enum grub_fshelp_filetype type = GRUB_FSHELP_DIR;
grub_fshelp_node_t currnode = currroot;
grub_fshelp_node_t oldnode = currroot;
auto int NESTED_FUNC_ATTR iterate (const char *filename,
enum grub_fshelp_filetype filetype,
grub_fshelp_node_t node);
auto void free_node (grub_fshelp_node_t node);
void free_node (grub_fshelp_node_t node)
{
if (node != rootnode && node != currroot)
grub_free (node);
}
int NESTED_FUNC_ATTR iterate (const char *filename,
enum grub_fshelp_filetype filetype,
grub_fshelp_node_t node)
{
if (type == GRUB_FSHELP_UNKNOWN || grub_strcmp (name, filename))
{
grub_free (node);
return 0;
}
/* The node is found, stop iterating over the nodes. */
type = filetype;
oldnode = currnode == rootnode ? 0 : currnode;
currnode = node;
return 1;
}
grub_strncpy (fpath, currpath, grub_strlen (currpath) + 1);
/* Remove all leading slashes. */
while (*name == '/')
name++;
if (!*name)
{
*currfound = currnode;
return 0;
}
for (;;)
{
int found;
/* Extract the actual part from the pathname. */
next = grub_strchr (name, '/');
if (next)
{
/* Remove all leading slashes. */
while (*next == '/')
*(next++) = '\0';
}
/* At this point it is expected that the current node is a
directory, check if this is true. */
if (type != GRUB_FSHELP_DIR)
{
free_node (currnode);
return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
}
/* Iterate over the directory. */
found = iterate_dir (currnode, iterate);
if (!found)
{
free_node (oldnode);
if (grub_errno)
return grub_errno;
break;
}
/* Read in the symlink and follow it. */
if (type == GRUB_FSHELP_SYMLINK)
{
char *symlink;
/* Test if the symlink does not loop. */
if (++symlinknest == 8)
{
free_node (currnode);
free_node (oldnode);
return grub_error (GRUB_ERR_SYMLINK_LOOP, "too deep nesting of symlinks");
}
symlink = read_symlink (currnode);
free_node (currnode);
if (!symlink)
{
free_node (oldnode);
return grub_errno;
}
/* The symlink is an absolute path, go back to the root inode. */
if (symlink[0] == '/')
{
free_node (oldnode);
oldnode = rootnode;
}
/* Lookup the node the symlink points to. */
find_file (symlink, oldnode, &currnode);
grub_free (symlink);
if (grub_errno)
{
free_node (oldnode);
return grub_errno;
}
}
free_node (oldnode);
/* Found the node! */
if (!next || *next == '\0')
{
*currfound = currnode;
foundtype = type;
return 0;
}
name = next;
}
return grub_error (GRUB_ERR_FILE_NOT_FOUND, "file not found");
}
if (!path || path[0] != '/')
{
grub_error (GRUB_ERR_BAD_FILENAME, "bad filename");
return grub_errno;
}
err = find_file (path, rootnode, foundnode);
if (err)
return err;
/* Check if the node that was found was of the expected type. */
if (expecttype == GRUB_FSHELP_REG && foundtype != expecttype)
return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a regular file");
else if (expecttype == GRUB_FSHELP_DIR && foundtype != expecttype)
return grub_error (GRUB_ERR_BAD_FILE_TYPE, "not a directory");
return 0;
}
/* 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
grub_fshelp_read_file (grub_disk_t disk, grub_fshelp_node_t node,
void (*read_hook) (unsigned long sector,
unsigned offset, unsigned length),
int pos, unsigned int len, char *buf,
int (*get_block) (grub_fshelp_node_t node, int block),
unsigned int filesize, int log2blocksize)
{
int i;
int blockcnt;
int blocksize = 1 << (log2blocksize + GRUB_DISK_SECTOR_BITS);
/* Adjust len so it we can't read past the end of the file. */
if (len > filesize)
len = filesize;
blockcnt = ((len + pos)
+ blocksize - 1) / blocksize;
for (i = pos / blocksize; i < blockcnt; i++)
{
int blknr;
int blockoff = pos % blocksize;
int blockend = blocksize;
int skipfirst = 0;
blknr = get_block (node, i);
if (grub_errno)
return -1;
blknr = blknr << log2blocksize;
/* Last block. */
if (i == blockcnt - 1)
{
blockend = (len + pos) % blocksize;
/* The last portion is exactly blocksize. */
if (!blockend)
blockend = blocksize;
}
/* First block. */
if (i == pos / blocksize)
{
skipfirst = blockoff;
blockend -= skipfirst;
}
/* If the block number is 0 this block is not stored on disk but
is zero filled instead. */
if (blknr)
{
disk->read_hook = read_hook;
grub_disk_read (disk, blknr, skipfirst,
blockend, buf);
disk->read_hook = 0;
if (grub_errno)
return -1;
}
else
grub_memset (buf, blocksize - skipfirst, 0);
buf += blocksize - skipfirst;
}
return len;
}

75
include/grub/fshelp.h Normal file
View file

@ -0,0 +1,75 @@
/* fshelp.h -- Filesystem helper functions */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2004 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 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#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;
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 (*read_hook) (unsigned long sector,
unsigned offset,
unsigned length),
int pos, unsigned int len, char *buf,
int (*get_block) (grub_fshelp_node_t node,
int block),
unsigned int filesize, int log2blocksize);
#endif /* ! GRUB_FSHELP_HEADER */