a8aa57628e
* include/grub/err.h (grub_err_t): Add `GRUB_ERR_MENU'. * kern/env.c (grub_env_unset): Don't free the member `value' when the type is GRUB_ENV_VAR_DATA, in this case it's a user defined pointer. * normal/main.c (current_menu): Removed. (free_menu): Unset the `menu' environment variable. (grub_normal_menu_addentry): Make use of the environment variable `menu', instead of using the global `current_menu'. Allocate memory for the sourcecode of this entry. (read_config_file): New argument `nested', changed all callers. Only in the case of a new context, initialize a new menu. Set the `menu' environment variable. (grub_normal_execute): Don't set and unset the environment variable `menu' here anymore. Only free the menu when leaving the context. * util/i386/pc/biosdisk.c (linux_find_partition): Fixed a memory leak.
541 lines
10 KiB
C
541 lines
10 KiB
C
/* main.c - the normal mode main routine */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2000,2001,2002,2003,2005,2006 Free Software Foundation, Inc.
|
|
*
|
|
* This program 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 this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <grub/kernel.h>
|
|
#include <grub/normal.h>
|
|
#include <grub/dl.h>
|
|
#include <grub/rescue.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/file.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/term.h>
|
|
#include <grub/env.h>
|
|
#include <grub/parser.h>
|
|
#include <grub/script.h>
|
|
|
|
grub_jmp_buf grub_exit_env;
|
|
|
|
static grub_fs_module_list_t fs_module_list = 0;
|
|
|
|
#define GRUB_DEFAULT_HISTORY_SIZE 50
|
|
|
|
/* Read a line from the file FILE. */
|
|
static char *
|
|
get_line (grub_file_t file)
|
|
{
|
|
char c;
|
|
int pos = 0;
|
|
int literal = 0;
|
|
int comment = 0;
|
|
char *cmdline;
|
|
int max_len = 64;
|
|
|
|
/* Initially locate some space. */
|
|
cmdline = grub_malloc (max_len);
|
|
if (! cmdline)
|
|
return 0;
|
|
|
|
while (1)
|
|
{
|
|
if (grub_file_read (file, &c, 1) != 1)
|
|
break;
|
|
|
|
/* Skip all carriage returns. */
|
|
if (c == '\r')
|
|
continue;
|
|
|
|
/* Replace tabs with spaces. */
|
|
if (c == '\t')
|
|
c = ' ';
|
|
|
|
/* The previous is a backslash, then... */
|
|
if (literal)
|
|
{
|
|
/* If it is a newline, replace it with a space and continue. */
|
|
if (c == '\n')
|
|
{
|
|
c = ' ';
|
|
|
|
/* Go back to overwrite the backslash. */
|
|
if (pos > 0)
|
|
pos--;
|
|
}
|
|
|
|
literal = 0;
|
|
}
|
|
|
|
if (c == '\\')
|
|
literal = 1;
|
|
|
|
if (comment)
|
|
{
|
|
if (c == '\n')
|
|
comment = 0;
|
|
}
|
|
else if (pos == 0)
|
|
{
|
|
if (c == '#')
|
|
comment = 1;
|
|
else if (! grub_isspace (c))
|
|
cmdline[pos++] = c;
|
|
}
|
|
else
|
|
{
|
|
if (c == '\n')
|
|
break;
|
|
|
|
if (pos >= max_len)
|
|
{
|
|
char *old_cmdline = cmdline;
|
|
max_len = max_len * 2;
|
|
cmdline = grub_realloc (cmdline, max_len);
|
|
if (! cmdline)
|
|
{
|
|
grub_free (old_cmdline);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
cmdline[pos++] = c;
|
|
}
|
|
}
|
|
|
|
cmdline[pos] = '\0';
|
|
|
|
/* If the buffer is empty, don't return anything at all. */
|
|
if (pos == 0)
|
|
{
|
|
grub_free (cmdline);
|
|
cmdline = 0;
|
|
}
|
|
|
|
return cmdline;
|
|
}
|
|
|
|
static void
|
|
free_menu (grub_menu_t menu)
|
|
{
|
|
grub_menu_entry_t entry = menu->entry_list;
|
|
|
|
while (entry)
|
|
{
|
|
grub_menu_entry_t next_entry = entry->next;
|
|
|
|
grub_script_free (entry->commands);
|
|
grub_free ((void *) entry->title);
|
|
grub_free ((void *) entry->sourcecode);
|
|
entry = next_entry;
|
|
}
|
|
|
|
grub_free (menu);
|
|
grub_env_unset_data_slot ("menu");
|
|
}
|
|
|
|
grub_err_t
|
|
grub_normal_menu_addentry (const char *title, struct grub_script *script,
|
|
const char *sourcecode)
|
|
{
|
|
const char *menutitle;
|
|
const char *menusourcecode;
|
|
grub_menu_t menu;
|
|
grub_menu_entry_t *last;
|
|
|
|
menu = grub_env_get_data_slot("menu");
|
|
if (! menu)
|
|
return grub_error (GRUB_ERR_MENU, "no menu context");
|
|
|
|
last = &menu->entry_list;
|
|
|
|
menusourcecode = grub_strdup (sourcecode);
|
|
if (! menusourcecode)
|
|
return grub_errno;
|
|
|
|
menutitle = grub_strdup (title);
|
|
if (! menutitle)
|
|
{
|
|
grub_free ((void *) menusourcecode);
|
|
return grub_errno;
|
|
}
|
|
|
|
/* Add the menu entry at the end of the list. */
|
|
while (*last)
|
|
last = &(*last)->next;
|
|
|
|
*last = grub_malloc (sizeof (**last));
|
|
if (! *last)
|
|
{
|
|
grub_free ((void *) menutitle);
|
|
grub_free ((void *) menusourcecode);
|
|
return grub_errno;
|
|
}
|
|
|
|
(*last)->commands = script;
|
|
(*last)->title = menutitle;
|
|
(*last)->next = 0;
|
|
(*last)->sourcecode = menusourcecode;
|
|
|
|
menu->size++;
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
static grub_menu_t
|
|
read_config_file (const char *config, int nested)
|
|
{
|
|
grub_file_t file;
|
|
auto grub_err_t getline (char **line);
|
|
int currline = 0;
|
|
int errors = 0;
|
|
|
|
grub_err_t getline (char **line)
|
|
{
|
|
currline++;
|
|
|
|
*line = get_line (file);
|
|
if (! *line)
|
|
return grub_errno;
|
|
|
|
return GRUB_ERR_NONE;
|
|
}
|
|
|
|
grub_menu_t newmenu;
|
|
|
|
if (nested)
|
|
{
|
|
newmenu = grub_malloc (sizeof (*newmenu));
|
|
if (! newmenu)
|
|
return 0;
|
|
newmenu->size = 0;
|
|
newmenu->entry_list = 0;
|
|
}
|
|
|
|
/* Try to open the config file. */
|
|
file = grub_file_open (config);
|
|
if (! file)
|
|
return 0;
|
|
|
|
if (nested)
|
|
grub_env_set_data_slot ("menu", newmenu);
|
|
else
|
|
newmenu = grub_env_get_data_slot ("menu");
|
|
|
|
while (1)
|
|
{
|
|
struct grub_script *parsed_script;
|
|
int startline;
|
|
char *cmdline;
|
|
|
|
cmdline = get_line (file);
|
|
if (!cmdline)
|
|
break;
|
|
|
|
startline = ++currline;
|
|
|
|
/* Execute the script, line for line. */
|
|
parsed_script = grub_script_parse (cmdline, getline);
|
|
|
|
grub_free (cmdline);
|
|
|
|
if (! parsed_script)
|
|
{
|
|
grub_printf ("(line %d-%d)\n", startline, currline);
|
|
errors++;
|
|
continue;
|
|
}
|
|
|
|
/* Execute the command(s). */
|
|
grub_script_execute (parsed_script);
|
|
|
|
/* The parsed script was executed, throw it away. */
|
|
grub_script_free (parsed_script);
|
|
}
|
|
|
|
grub_file_close (file);
|
|
|
|
if (errors > 0)
|
|
{
|
|
/* Wait until the user pushes any key so that the user can
|
|
see what happened. */
|
|
grub_printf ("\nPress any key to continue...");
|
|
(void) grub_getkey ();
|
|
}
|
|
|
|
return newmenu;
|
|
}
|
|
|
|
/* This starts the normal mode. */
|
|
void
|
|
grub_enter_normal_mode (const char *config)
|
|
{
|
|
if (grub_setjmp (grub_exit_env) == 0)
|
|
grub_normal_execute (config, 0);
|
|
}
|
|
|
|
/* Initialize the screen. */
|
|
void
|
|
grub_normal_init_page (void)
|
|
{
|
|
grub_cls ();
|
|
grub_printf ("\n\
|
|
GNU GRUB version %s\n\n",
|
|
PACKAGE_VERSION);
|
|
}
|
|
|
|
/* Read the file command.lst for auto-loading. */
|
|
static void
|
|
read_command_list (void)
|
|
{
|
|
const char *prefix;
|
|
|
|
prefix = grub_env_get ("prefix");
|
|
if (prefix)
|
|
{
|
|
char *filename;
|
|
|
|
filename = grub_malloc (grub_strlen (prefix) + sizeof ("/command.lst"));
|
|
if (filename)
|
|
{
|
|
grub_file_t file;
|
|
|
|
grub_sprintf (filename, "%s/command.lst", prefix);
|
|
file = grub_file_open (filename);
|
|
if (file)
|
|
{
|
|
while (1)
|
|
{
|
|
char *p;
|
|
grub_command_t cmd;
|
|
char *buf = get_line (file);
|
|
|
|
if (! buf)
|
|
break;
|
|
|
|
if (! grub_isgraph (buf[0]))
|
|
continue;
|
|
|
|
p = grub_strchr (buf, ':');
|
|
if (! p)
|
|
continue;
|
|
|
|
*p = '\0';
|
|
while (*++p == ' ')
|
|
;
|
|
|
|
if (! grub_isgraph (*p))
|
|
continue;
|
|
|
|
cmd = grub_register_command (buf, 0,
|
|
GRUB_COMMAND_FLAG_NOT_LOADED,
|
|
0, 0, 0);
|
|
if (! cmd)
|
|
{
|
|
grub_free (buf);
|
|
continue;
|
|
}
|
|
|
|
cmd->module_name = grub_strdup (p);
|
|
if (! cmd->module_name)
|
|
grub_unregister_command (buf);
|
|
grub_free (buf);
|
|
}
|
|
|
|
grub_file_close (file);
|
|
}
|
|
|
|
grub_free (filename);
|
|
}
|
|
}
|
|
|
|
/* Ignore errors. */
|
|
grub_errno = GRUB_ERR_NONE;
|
|
}
|
|
|
|
/* The auto-loading hook for filesystems. */
|
|
static int
|
|
autoload_fs_module (void)
|
|
{
|
|
grub_fs_module_list_t p;
|
|
|
|
while ((p = fs_module_list) != 0)
|
|
{
|
|
if (! grub_dl_get (p->name) && grub_dl_load (p->name))
|
|
return 1;
|
|
|
|
fs_module_list = p->next;
|
|
grub_free (p->name);
|
|
grub_free (p);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Read the file fs.lst for auto-loading. */
|
|
static void
|
|
read_fs_list (void)
|
|
{
|
|
const char *prefix;
|
|
|
|
prefix = grub_env_get ("prefix");
|
|
if (prefix)
|
|
{
|
|
char *filename;
|
|
|
|
filename = grub_malloc (grub_strlen (prefix) + sizeof ("/fs.lst"));
|
|
if (filename)
|
|
{
|
|
grub_file_t file;
|
|
|
|
grub_sprintf (filename, "%s/fs.lst", prefix);
|
|
file = grub_file_open (filename);
|
|
if (file)
|
|
{
|
|
while (1)
|
|
{
|
|
char *buf;
|
|
char *p;
|
|
char *q;
|
|
grub_fs_module_list_t fs_mod;
|
|
|
|
buf = get_line (file);
|
|
if (! buf)
|
|
break;
|
|
|
|
p = buf;
|
|
q = buf + grub_strlen (buf) - 1;
|
|
|
|
/* Ignore space. */
|
|
while (grub_isspace (*p))
|
|
p++;
|
|
|
|
while (p < q && grub_isspace (*q))
|
|
*q-- = '\0';
|
|
|
|
/* If the line is empty, skip it. */
|
|
if (p >= q)
|
|
continue;
|
|
|
|
fs_mod = grub_malloc (sizeof (*fs_mod));
|
|
if (! fs_mod)
|
|
continue;
|
|
|
|
fs_mod->name = grub_strdup (p);
|
|
if (! fs_mod->name)
|
|
{
|
|
grub_free (fs_mod);
|
|
continue;
|
|
}
|
|
|
|
fs_mod->next = fs_module_list;
|
|
fs_module_list = fs_mod;
|
|
}
|
|
|
|
grub_file_close (file);
|
|
}
|
|
|
|
grub_free (filename);
|
|
}
|
|
}
|
|
|
|
/* Ignore errors. */
|
|
grub_errno = GRUB_ERR_NONE;
|
|
|
|
/* Set the hook. */
|
|
grub_fs_autoload_hook = autoload_fs_module;
|
|
}
|
|
|
|
/* Read the config file CONFIG and execute the menu interface or
|
|
the command-line interface. */
|
|
void
|
|
grub_normal_execute (const char *config, int nested)
|
|
{
|
|
grub_menu_t menu = 0;
|
|
|
|
read_command_list ();
|
|
read_fs_list ();
|
|
|
|
if (config)
|
|
{
|
|
menu = read_config_file (config, nested);
|
|
|
|
/* Ignore any error. */
|
|
grub_errno = GRUB_ERR_NONE;
|
|
}
|
|
|
|
if (menu)
|
|
{
|
|
grub_menu_run (menu, nested);
|
|
if (nested)
|
|
free_menu (menu);
|
|
}
|
|
else
|
|
grub_cmdline_run (nested);
|
|
}
|
|
|
|
/* Enter normal mode from rescue mode. */
|
|
static void
|
|
grub_rescue_cmd_normal (int argc, char *argv[])
|
|
{
|
|
if (argc == 0)
|
|
{
|
|
/* Guess the config filename. It is necessary to make CONFIG static,
|
|
so that it won't get broken by longjmp. */
|
|
static char *config;
|
|
const char *prefix;
|
|
|
|
prefix = grub_env_get ("prefix");
|
|
if (prefix)
|
|
{
|
|
config = grub_malloc (grub_strlen (prefix) + sizeof ("/grub.cfg"));
|
|
if (! config)
|
|
return;
|
|
|
|
grub_sprintf (config, "%s/grub.cfg", prefix);
|
|
grub_enter_normal_mode (config);
|
|
grub_free (config);
|
|
}
|
|
else
|
|
grub_enter_normal_mode (0);
|
|
}
|
|
else
|
|
grub_enter_normal_mode (argv[0]);
|
|
}
|
|
|
|
GRUB_MOD_INIT(normal)
|
|
{
|
|
/* Normal mode shouldn't be unloaded. */
|
|
if (mod)
|
|
grub_dl_ref (mod);
|
|
|
|
grub_set_history (GRUB_DEFAULT_HISTORY_SIZE);
|
|
|
|
/* Register a command "normal" for the rescue mode. */
|
|
grub_rescue_register_command ("normal", grub_rescue_cmd_normal,
|
|
"enter normal mode");
|
|
|
|
/* This registers some built-in commands. */
|
|
grub_command_init ();
|
|
}
|
|
|
|
GRUB_MOD_FINI(normal)
|
|
{
|
|
grub_set_history (0);
|
|
grub_rescue_unregister_command ("normal");
|
|
}
|
|
|