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发信人: reden (鱼 ～ 看流星和她的故事), 信区: Linux
标 题: Linux Remote-Boot mini-HOWTO(6/7)
发信站: BBS 水木清华站 (Sun Oct 18 21:08:47 1998) WWW-POST
Clean partitions (disk) ("label")
Fast-format the given partition(s) according to the type declared in the
partition table. If a label is given and the filesystem
supports it, setup the partition label. For a paranoiac full format,
call Blank on the partition first.
Clean is supported for (FAT16) BIGDOS, FAT32, EXT, LINUX-EXT2 and
LINUX-SWAP partitions. To clean the
master boot record (MBR), use Clean 0.
Clean should be used on data partitions and on MBR/EXT partitions. It is
totally useless to clean a partition before unzipping
a filesystem on it using FullUnzip.
FullUnzip "full-archive" partition (disk)
Decompress a full disk archive to the given partition, overwriting any
existing file (clean-up on the fly).
FullUnzip is supported for (FAT16) BIGDOS, FAT32 and LINUX-EXT2.
Unfortunately, images restored from FAT32 do
not seem to be bootable, although all files are restored correctly. This
should be fixed in a future release.
This commands turn on VESA graphics to display a progress banner, unless
VESA has been turned OFF.
IncrUnzip "incr-archive" "destpath"
Decompress an incremental disk archive to the given path. Files in the
archive replace those with the same name on the
target path, but other files are not deleted.
IncrUnzip is supported for (FAT16) BIGDOS, FAT32 and LINUX-EXT2. This
command is far less efficient than
FullUnzip since the existing filesystem structure must be preserved.
However, it avoids multiplying the number of different
disk images by storing the differences only.
FileUnzip "source-filename" "dest-filename"
Uncompress a file previously compressed with MrZip FileZip command. The
file is validated by a 32-bits CRC.
Copy "source-filename" "dest-filename"
Copy the source file to the destinaton file, byte-to-byte. Can be used
after a FullUnzip for instance to update configuration
files from the server without rebuilding the image. Better to use
FileUnzip for big and easy-to-compress files.
Append "src-filename-1" "src-filename-2" "dest-filename"
Copy the first, then the second file to the destination file,
byte-to-byte. Can be used on arbitrary large files. The destination
file cannot be one of the two source files.
Patch "source-filename" "dest-filename" ("prefix" ("postfix"))
Read the source file and perform variable substitution before writing it
to the destination file. The interpretation of
characters above ASCII 127 depends on the value of $IsoLatin.
By default, variables are recognized when prefixed by "${" and postfixed
by "}". This can be changed to any other
non-empty string. remember that if you want to use a dollar sign within
the prefix or suffix, you must escape it or it will get
macro-evaluated. For instance, if you want to explicitely use the
default prefix and postfix, use:
Patch "source-file" "dest-file" "\${" "}"
MkDir "path"
Recursively create directories from the root to the given full path. If
the path already exists, this command has no effect.
Delete "filename", Del "filaname"
Remove the given file. The file must exist.
DelTree "path"
Recursively remove all files and directories under the given path, and
remove the directory itself.
Boot commands
This section lists commands for continuing the boot process. Optional
arguments are listed between parenthesis.
HideBootProm
Restore the memory and the interrupt vectors allocated by the bootprom.
All attempts to make TFTP transfers will fail
after calling this command. It is usually a good idea to call this
command before HdBoot, or you might run short of memory
under DOS/Windows. This command is implicitely called by FloppyBoot.
Note that although this function restore all vectors "officially"
rerouted by the BootProm, it does not seems to restore
everything. But it works well enough for DOS and Windows.
LoadRamDisk "ramdisk-filename"
Load a floppy disk image into the extended memory and redirect the BIOS
Disk Services to make floppy disk calls use this
image instead. This command implicitely calls HideBootProm. Call
FloppyBoot to boot on the ramdisk you just
loaded.
This kind of ramdisk may not be as robust as what you get when you use
the TFTPBoot command. The only advantage is
that it only steals a few hundred bytes of conventional memory instead
of the >64 KB reserved by the TCP/IP
BootPROM. Warning, nothing secures the extended memory in which the
ramdisk resides. There is no way to uninstall
such a ramdisk.
LoadZRamDisk "ramdisk-filename"
Do the same as LoadRamDisk, but for an image that has been compressed
using MrZip FileZip command. Compressed
ramdisks are protected against data corruption (and uncomplete download)
by a byte count and a 32-bits CRC.
TFTPBoot "remote-bootfile"
Chain to another boot file (for instance a floppy image made with
InCom's BpShell program). See the file referencing
conventions for accessing a file on another TFTP server.
FloppyBoot
Hide the Boot ROM, load the floppy disk boot sector and boot on it.
Unfortunately, this command does not seems to work
well enough for LDLINUX.SYS (used on RedHat Linux setup disk) to work.
HdBoot (disk)(:partition)
Load the given boot sector and boot from it. The disk default to zero,
the first hard disk, and the partition defaults to zero, ie.
the master boot record. You can boot from any partition, but be warned
that Windows 95 may not let you boot a partition
that has not been set as the boot partition (hint: use SetBootPart).
This command does not implicitely call HideBootProm, so you might want
to call it before.
LinuxBoot "kernelfile" ("command-line" ("ramdisk-file"))
Load the given kernel and ramdisk into the high memory, setup the
command line and boot the kernel. It is a good idea to
put at least a minimal command line with the location of the root
filesystem (like "root=dev/hda1"/). If you are using a
linux system that heavily relies on lilo (like RedHat Linux 5.1), it may
be necessary to add to the command line
something like BOOT_IMAGE=linux. Note that the kernel can be loaded by
TFTP (automatically cached on the hard
disk) or directly from the target root partition.
This command works for small and big kernels (zImage and bzImage).
National language support
This section lists commands related not national language support. Optional
arguments are listed between parenthesis.
RemapKeys "original-keys" "remapped-keys"
National keyboard support. Remap given keys to other characters. For
instance, to swap the Y and Z keys, use
Remapkeys "yzYZ" "zyZY"
It is a good idea to use the quoted octal notation when using characters
not included in the minimal ASCII character set, in
order to avoid a dependency to the iso-latin modal settings.
For international keyboards, there are two keys that produce a backslash
in non-remapped (US) mode. Each of them can
be independantly remapped, thanks to the fact that BpBatch sees one of
them as a key answering ASCII code 252
(octal) or ASCII code 335 (octal) when shifted.
If you send me a sample script that does keyboard mapping for your
national keyboard, I will make it available under
http://cuiwww.unige.ch/info/pc/remote-boot/soft/sample-scripts To help
you make your
own keyboard mapping, I suggest pressing all special keys without
remapping the keyboard and writing down the character
they produce. These will be the original-keys. The remapped-keys simply
are the key you would have liked to
see, in the same order. If some keys (either original or remapped)
produce characters above ASCII dec 127, use the
quoted octal notation. You can easily get the octal code for any given
character by looking in the ASCII table of HelpPC
for instance (HelpPC is a shareware hypertext on-line help program by
David Jurgens).
RemapAltkeys "original-keys" "remapped-keys"
National keyboard support. Remap the given keys when ALT is depressed
For instance, to map Alt-2 to the ampersand
sign, use
RemapAltKeys "2" "@"
Note that dead keys are not supported.
LoadCodePage "cpxxx.bin"
Load and activate the given binary Codepage file. Codepages are used for
the translation of Unicode characters (present
on VFAT valumes for instance) into 8-bits characters. If you do not have
the right Codepage loaded, you will get FAT
warnings while accessing the filesystem when special characters are
encountred.
All binary codepage files are available at
http://cuiwww.unige.ch/info/pc/remote-boot/soft/codepage.zip
The default codepage is 850, a reordered superset of ISO-Latin-1. If you
load a more exotic codepage, you should usually
turn the variable $IsoLatin to "off" or you might get meaningless
implicit conversions. Moreover, if you want to
display exotic characters, you should also load the proper screen font
(use "LoadFont").
LoadFont "fontfile"
Load and activate a VGA/VESA font, both in text and graphic mode. The
font file must be a binary file of 16
bztes/characters (8x16 bitmap). This command can be used for National
Language Support as well as for Fantasy support.
An archive with several fantasy fonts is available at
http://cuiwww.unige.ch/info/pc/remote-boot/soft/fonts.zip. This archive
also contains a
program to extract fonts for your codepage from the DOS .CPI file.
Commands specific to MrZip
Source...
Source (i)archive "filename"
Source path "path"
Set the source for the archive manipulation to the given (incremental)
archive file or disk path.
Dest...
Dest (i)archive "filename"
Dest (i)dump
Dest path "path"
Set the destination for the archive manipulation to the given
(incremental) archive file, dump or disk path. To control the
quantity of data displayed during dump, use the $DumpFormat special
variable.
FileZip "source-filename" "dest-filename"
Compress a file for further decompression with FileUnzip or for using as
ZRamDisk. The file is validated by a 32-bits CRC.
Filter...
Filter -"pattern"
Filter +"pattern"
Avoid/allow files and directories matching the given pattern (wildcards
allowed) to be included in the archive. The pattern is
matched agains the full pathname. By default, all files are included in
the image. You only need to explicitely allow files that
where cancelled by a filter. Each negative filter has its own positive
filter (allowed) sublist.
For DOS/Windows images, you will typically use
Filter -"*.swp"
Filter -"temp/*"
and for Unix images, you will typically use
Filter -"var/log/*"
Filter -"tmp/*"
CopyArchive
Start the archive manipulation operation, according to source,
destination and filter settings. Except in a few circumstances,
you will probably use the shortcut below instead of explicitely calling
CopyArchive. One circumstance in which you will
use CopyArchive explicitely is when you want to change the fragmentation
of an image, as follow:
set FragmentSize="30 MB"
Source archive "original.imz"
Dest archive "refragmented.imz"
CopyArchive
FullZip "path" "full-archive"
Shortcut for
Source path "path"
Dest archive "full-archive"
CopyArchive
You should usually first setup filters.
IncrZip "path" "incr-archive"
Shortcut for
Source path "path"
Dest iarchive "incr-archive"
CopyArchive
FullDump "full-archive"
Shortcut for
Source archive "full-archive"
Dest dump
CopyArchive
IncrDump "incr-archive"
Shortcut for
Source iarchive "incr-archive"
Dest dump
CopyArchive
XCopy "srcpath" "dstpath"
Shortcut for
Source path "srcpath"
Dest path "dstpath"
CopyArchive
5.2 NoBreak.sys
Nobreak.sys is a very small (about 350 bytes only) driver that you include at
the beginning of your config.sys. Its goal is
to secure the boot process, until the user is logged in. DOS provides a
setting for this (namely BREAK=OFF), but it is not drastic
enough, and has almost no effect in the autoexec.bat. Our driver works by
modifying the scan-code of the key pressed when
a break is requested, directly at the BIOS level. This way, no program at all
can receive a break until break is enabled again.
The driver must be loaded from the config.sys (or using the devlod program
from Undocumented DOS). Afterwards,
break can be enabled by sending Yes to the NOBRK pseudo-device, and disabled
again by sending No (in fact, only the first
character, Y or N is significant).
As this driver relies on the BIOS, it does only work for DOS and Windows 3.1.
Windows 95 has its own low-level keyboard
handling routines.
Assembler source code is available.
--
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丽的姑娘就像古高昌国人那样固执:
「那都是很好很好的，可是我偏不喜欢。」
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