vbatts/grub
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

cleanup the function cat and update the manual.

Browse source
This commit is contained in:
okuji 1999-10-02 15:00:02 +00:00
parent 07b947e669
commit ce8fc4e5a0
3 changed files with 85 additions and 20 deletions
Download patch file Download diff file Expand all files Collapse all files

10
ChangeLog
View file

@ -1,3 +1,13 @@
1999-10-02 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
* stage2/builtins.c (cat_func): Do not read the whole of a file
at one time. Instead, repeat reading one byte and print it on
the screen.
* docs/grub.texi (Command line): List the available key
bindings.
(Commands): Added descriptions about "geometry", "device" and
"cat".
1999-10-02 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
Now it is possible to build the grub shell with old BSD curses.

82
docs/grub.texi
View file

@ -539,19 +539,57 @@ behavior will be changed in the future version, in a user-invisible
way.}. The commands are a subset of those available in the configuration
file, used with exactly the same syntax.
@c FIXME: The list of available keys should be listed in @table, and should be
@c explained exactly. Current explanation is obscure.
Cursor movement and editing of the text on the line can be done via a
subset of the functions available in the BASH shell (@kbd{C-f} forward,
@kbd{C-b} backward, @kbd{C-a} beginning of line, @kbd{C-e} end of line,
@kbd{C-k} delete to end, @kbd{C-u} delete to beginning; the PC left and
right arrow keys, @key{HOME}, @key{DEL}, and @key{END} work as well).
subset of the functions available in the BASH shell:
@table @key
@item C-f
@itemx PC left key
Move forward one character.
@item C-b
@itemx PC right key
Move back one character.
@item C-a
@itemx HOME
Move to the start of the line.
@item C-e
@itemx END
Move the the end of the line.
@item C-d
@itemx DEL
Delete the character underneath the cursor.
@item C-h
@itemx BS
Delete the character to the left of the cursor.
@item C-k
Kill the text from the current cursor position to the end of the line.
@item C-u
Kill backward from the cursor to the beginning of the line.
@item C-y
Yank the killed text back into the buffer at the cursor.
@item C-p
@itemx PC up key
Move up through the history list.
@item C-n
@itemx PC down key
Move down through the history list.
@end table
When typing commands interactively, if the cursor is within or before
the first word in the command-line, pressing the @key{TAB} key will
display a listing of the available commands, and if the cursor is after
the first word, the @key{TAB} will provide a completion listing
of disks, partitions, and filenames depending on the context.
the first word in the command-line, pressing the @key{TAB} key (or
@key{C-i}) will display a listing of the available commands, and if the
cursor is after the first word, the @key{TAB} will provide a completion
listing of disks, partitions, and filenames depending on the context.
@node Menu
@ -673,6 +711,9 @@ This boots the OS/chain-loader which has been loaded. Only necessary if
running the fully interactive command line (it is implicit at the end of
a config-file entry).
@item cat @var{file}
Display the contents of the file @var{file}.
@item color @var{normal} [@var{highlight}]
Change the menu colors. The color @var{normal} is used for most
lines in the menu, and the color @var{highlight} is used to highlight the
@ -761,6 +802,19 @@ sector of the current partition with @samp{+1}.
@item configfile @var{file}
Load @var{file} as the configuration file.
@item device @var{drive} @var{file}
In the grub shell, specify the file @var{file} as the actual drive for a
@sc{bios} drive @var{drive}. You can use this command to create a disk
image and to fix the drives guessed by GRUB when GRUB fails to determine
them correctly, like this:
@example
grub> device (fd0) /floppy-image
grub> device (hd0) /dev/sd0
@end example
This command is just ignored in Stage 2.
@item displaymem
Display what GRUB thinks the system address space map of the machine is,
including all regions of physical @sc{ram} installed. GRUB's
@ -784,6 +838,14 @@ requests from the disk.
Filesystem test mode is turned off by any use of the @command{install}
or @command{testload} commands.
@item geometry @var{drive} [@var{cylinder} @var{head} @var{sector} [@var{total_sector}]]
Print the information for the drive @var{drive}. In the grub shell, you
can set the geometry of the drive arbitrarily. The number of the
cylinders, the one of the heads, the one of the sectors and the one of
the total sectors are set to CYLINDER, HEAD, SECTOR and TOTAL_SECTOR,
respectively. If you omit TOTAL_SECTOR, then it will be calculated
based on the C/H/S values automatically.
@item help [@var{pattern} @dots{}]
Display helpful information about builtin commands. If you do not
specify @var{pattern}, this command lists the short documents of all

13
stage2/builtins.c
View file

@ -131,20 +131,13 @@ static struct builtin builtin_boot =
static int
cat_func (char *arg, int flags)
{
int len;
char *ptr;
char c;
if (! grub_open (arg))
return 1;
len = grub_read ((char *) RAW_ADDR (0x100000), -1);
if (errnum)
return 1;
ptr = (char *) RAW_ADDR (0x100000);
while (len--)
grub_putchar (*ptr++);
while (grub_read (&c, 1))
grub_putchar (c);
return 0;
}