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improve the performance of find_command a bit, and capitalize the variable names in the short docs.

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okuji 1999-09-06 02:58:06 +00:00
parent 3b34bb5343
commit 6fdc01aaf8
3 changed files with 70 additions and 23 deletions
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22
ChangeLog
View file

@ -1,3 +1,25 @@
1999-09-06 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
* stage2/cmdline.c (find_command): If COMMAND is less than
(*BUILTIN)->NAME in dictionary order, break the loop.
* stage2/builtins.c (builtin_chainloader): Capitalize the
variable name in the short doc.
(builtin_color): Likewise.
(builtin_geometry): Likewise.
(builtin_help): Likewise.
(builtin_hide): Likewise.
(builtin_initrd): Likewise.
(builtin_install): Likewise.
(builtin_kernel): Likewise.
(builtin_module): Likewise.
(builtin_modulenounzip): Likewise.
(builtin_pause): Likewise.
(builtin_read): Likewise.
(builtin_root): Likewise.
(builtin_testload): Likewise.
(builtin_unhide): Likewise.
(builtin_uppermem): Likewise.
1999-09-05 OKUJI Yoshinori <okuji@kuicr.kyoto-u.ac.jp>
The internal of the command handling is heavily modified, and

40
stage2/builtins.c
View file

@ -152,7 +152,7 @@ static struct builtin builtin_chainloader =
"chainloader",
chainloader_func,
BUILTIN_CMDLINE,
"chainloader file",
"chainloader FILE",
"Load FILE as a chain-loader."
};
@ -186,7 +186,7 @@ static struct builtin builtin_color =
"color",
color_func,
BUILTIN_CMDLINE | BUILTIN_MENU,
"color normal [highlight]",
"color NORMAL [HIGHLIGHT]",
"Change the menu colors. The color NORMAL is used for the normal"
" line in the menu, and the color HIGHLIGHT is used to highlight the"
" line where the cursor points to. If you omit HIGHLIGHT, then the"
@ -242,7 +242,7 @@ static struct builtin builtin_default =
default_func,
BUILTIN_MENU,
#if 0
"default num",
"default NUM",
"Set the default entry to entry number NUM (if not specified, it is"
" 0, the first entry)."
#endif
@ -317,7 +317,7 @@ static struct builtin builtin_fallback =
fallback_func,
BUILTIN_MENU,
#if 0
"fallback num",
"fallback NUM",
"Go into unattended boot mode: if the default boot entry has any"
" errors, instead of waiting for the user to do anything, it"
" immediately starts over using the NUM entry (same numbering as the"
@ -399,7 +399,7 @@ static struct builtin builtin_geometry =
"geometry",
geometry_func,
BUILTIN_CMDLINE,
"geometry drive",
"geometry DRIVE",
"Print the information for the drive DRIVE."
};
@ -511,7 +511,7 @@ static struct builtin builtin_help =
"help",
help_func,
BUILTIN_CMDLINE,
"help [pattern ...]",
"help [PATTERN ...]",
"Display helpful information about builtin commands."
};
@ -536,7 +536,7 @@ static struct builtin builtin_hide =
"hide",
hide_func,
BUILTIN_CMDLINE | BUILTIN_MENU,
"hide drive",
"hide DRIVE",
"Hide the drive DRIVE by adding 0x10 into the partition type."
};
@ -590,7 +590,7 @@ static struct builtin builtin_initrd =
"initrd",
initrd_func,
BUILTIN_CMDLINE,
"initrd file [arg ...]",
"initrd FILE [ARG ...]",
"Load an initial ramdisk FILE for a Linux format boot image and set the"
" appropriate parameters in the Linux setup area in memory."
};
@ -847,7 +847,7 @@ static struct builtin builtin_install =
"install",
install_func,
BUILTIN_CMDLINE,
"install stage1 [d] device stage2 addr [p] [config_file]",
"install STAGE1 [d] DEVICE STAGE2 ADDR [p] [CONFIG_FILE]",
"Install STAGE1 into DEVICE, and install a blocklist for loading STAGE2"
" as a Stage 2. If the option `d' is present, the Stage 1 will always"
" look for the actual disk STAGE2 is installed on, rather than using"
@ -890,7 +890,7 @@ static struct builtin builtin_kernel =
"kernel",
kernel_func,
BUILTIN_CMDLINE,
"kernel file [arg ...]",
"kernel FILE [ARG ...]",
"Attempt to load the primary boot image (Multiboot a.out or ELF,"
" Linux zImage or bzImage, FreeBSD a.out, or NetBSD a.out) from"
" FILE. This command ignores the rest of the contents of the line,"
@ -961,7 +961,7 @@ static struct builtin builtin_module =
"module",
module_func,
BUILTIN_CMDLINE,
"module file [arg ...]",
"module FILE [ARG ...]",
"Load a boot module FILE for a Multiboot format boot image (no"
" interpretation of the file contents are made, so that user of this"
" command must know what the kernel in question works with). The"
@ -994,7 +994,7 @@ static struct builtin builtin_modulenounzip =
"modulenounzip",
modulenounzip_func,
BUILTIN_CMDLINE,
"modulenounzip file [arg ...]",
"modulenounzip FILE [ARG ...]",
"Exactly like `module=', except that automatic decompression is"
" disabled."
};
@ -1023,7 +1023,7 @@ static struct builtin builtin_password =
password_func,
BUILTIN_MENU,
#if 0
"password passwd file",
"password PASSWD FILE",
"Disable all interactive editing control (menu entry editor and"
" command line). If the password PASSWD is entered, it loads the"
" FILE as a new config file and restarts the GRUB Stage 2."
@ -1047,7 +1047,7 @@ static struct builtin builtin_pause =
"pause",
pause_func,
BUILTIN_CMDLINE,
"pause [message ...]",
"pause [MESSAGE ...]",
"Print the MESSAGE, then wait until a key is pressed. Note that"
" placing <^G> (ASCII code 7) in the message will cause the speaker"
" to emit the standard beep sound, which is useful when prompting"
@ -1095,7 +1095,7 @@ static struct builtin builtin_read =
"read",
read_func,
BUILTIN_CMDLINE,
"read addr",
"read ADDR",
"Read a 32-bit unsigned value from memory at address ADDR and"
" displays it in hex format."
};
@ -1139,7 +1139,7 @@ static struct builtin builtin_root =
"root",
root_func,
BUILTIN_CMDLINE,
"root device [hdbias]",
"root DEVICE [HDBIAS]",
"Set the current \"root partition\" to the device DEVICE, then"
" attempt to mount it to get the partition size (for passing the"
" partition descriptor in `ES:ESI', used by some chain-loaded"
@ -1258,7 +1258,7 @@ static struct builtin builtin_testload =
"testload",
testload_func,
BUILTIN_CMDLINE,
"testload file",
"testload FILE",
"Read the entire contents of FILE in several different ways and"
" compares them, to test the filesystem code. The output is somewhat"
" cryptic, but if no errors are reported and the final `i=X,"
@ -1285,7 +1285,7 @@ static struct builtin builtin_timeout =
timeout_func,
BUILTIN_MENU,
#if 0
"timeout sec",
"timeout SEC",
"Set a timeout, in SEC seconds, before automatically booting the"
" default entry (normally the first entry defined)."
#endif
@ -1296,7 +1296,7 @@ static struct builtin builtin_timeout =
static int
title_func (char *arg, int flags)
{
/* This function is not actually at least currently. */
/* This function is not actually used at least currently. */
return 0;
}
@ -1306,7 +1306,7 @@ static struct builtin builtin_title =
title_func,
BUILTIN_TITLE,
#if 0
"title name [...]",
"title [NAME ...]",
"Start a new boot entry, and set its name to the contents of the"
" rest of the line, starting with the first non-space character."
#endif

29
stage2/cmdline.c
View file

@ -45,7 +45,7 @@ skip_to (int after_equal, char *cmdline)
return cmdline;
}
/* Print a helpful message for the command-line interface. */
void
print_cmdline_message (void)
{
@ -73,11 +73,16 @@ find_command (char *command)
/* Seek out the builtin whose command name is COMMAND. */
for (builtin = builtin_table; *builtin != 0; builtin++)
{
if (grub_strcmp (command, (*builtin)->name) == 0)
int ret = grub_strcmp (command, (*builtin)->name);
if (ret == 0)
{
/* Find the builtin for COMMAND. */
*ptr = c;
return *builtin;
}
else if (ret < 0)
break;
}
/* Cannot find COMMAND. */
@ -86,6 +91,7 @@ find_command (char *command)
return 0;
}
/* Initialize the data for the command-line. */
static void
init_cmdline (void)
{
@ -100,9 +106,12 @@ init_cmdline (void)
if (mbi.mmap_length)
mbi.flags |= MB_INFO_MEM_MAP;
/* Initialize the data for the builtin commands. */
init_builtins ();
}
/* Enter the command-line interface. HEAP is used for the command-line
buffer. Return only if get_cmdline returns non-zero (ESC is pushed). */
void
enter_cmdline (char *heap)
{
@ -123,21 +132,27 @@ enter_cmdline (char *heap)
if (get_cmdline (PACKAGE "> ", heap, 2048, 0, 1))
return;
/* Find a builtin. */
builtin = find_command (heap);
if (! builtin)
continue;
/* If BUILTIN cannot be run in the command-line, skip it. */
if (! (builtin->flags & BUILTIN_CMDLINE))
{
errnum = ERR_UNRECOGNIZED;
continue;
}
/* Run BUILTIN->FUNC. */
arg = skip_to (1, heap);
(builtin->func) (arg, BUILTIN_CMDLINE);
}
}
/* Run an entry from the script SCRIPT. HEAP is used for the
command-line buffer. If an error occurs, return non-zero, otherwise
return zero. */
int
run_script (char *script, char *heap)
{
@ -156,6 +171,8 @@ run_script (char *script, char *heap)
if (errnum)
{
/* If FALLBACK_ENTRY does not have any meaningful value, do
not wait for the input. */
if (fallback_entry < 0)
return 1;
@ -164,6 +181,7 @@ run_script (char *script, char *heap)
return 1;
}
/* Copy the first string in CUR_ENTRY to HEAP. */
old_entry = cur_entry;
while (*cur_entry++)
;
@ -173,22 +191,29 @@ run_script (char *script, char *heap)
if (! *heap)
{
/* If there is no more command in SCRIPT... */
/* If any kernel is not loaded, just exit successfully. */
if (kernel_type == KERNEL_TYPE_NONE)
return 0;
/* Otherwise, the command boot is run implicitly. */
grub_memmove (heap, "boot", 5);
}
/* Find a builtin. */
builtin = find_command (heap);
if (! builtin)
continue;
/* If BUILTIN cannot be run in the command-line, skip it. */
if (! (builtin->flags & BUILTIN_CMDLINE))
{
errnum = ERR_UNRECOGNIZED;
continue;
}
/* Run BUILTIN->FUNC. */
arg = skip_to (1, heap);
(builtin->func) (arg, BUILTIN_CMDLINE);
}