40e80b9403
config_directory. * util/grub.d/41_custom.in: Use config_directoy when available.
568 lines
12 KiB
C
568 lines
12 KiB
C
/* main.c - the normal mode main routine */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2000,2001,2002,2003,2005,2006,2007,2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/kernel.h>
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#include <grub/normal.h>
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#include <grub/dl.h>
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#include <grub/misc.h>
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#include <grub/file.h>
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#include <grub/mm.h>
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#include <grub/term.h>
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#include <grub/env.h>
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#include <grub/parser.h>
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#include <grub/reader.h>
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#include <grub/menu_viewer.h>
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#include <grub/auth.h>
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#include <grub/i18n.h>
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#include <grub/charset.h>
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#include <grub/script_sh.h>
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GRUB_MOD_LICENSE ("GPLv3+");
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#define GRUB_DEFAULT_HISTORY_SIZE 50
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static int nested_level = 0;
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int grub_normal_exit_level = 0;
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/* Read a line from the file FILE. */
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char *
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grub_file_getline (grub_file_t file)
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{
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char c;
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grub_size_t pos = 0;
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char *cmdline;
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int have_newline = 0;
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grub_size_t max_len = 64;
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/* Initially locate some space. */
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cmdline = grub_malloc (max_len);
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if (! cmdline)
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return 0;
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while (1)
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{
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if (grub_file_read (file, &c, 1) != 1)
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break;
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/* Skip all carriage returns. */
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if (c == '\r')
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continue;
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if (pos >= max_len)
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{
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char *old_cmdline = cmdline;
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max_len = max_len * 2;
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cmdline = grub_realloc (cmdline, max_len);
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if (! cmdline)
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{
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grub_free (old_cmdline);
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return 0;
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}
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}
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if (c == '\n')
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{
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have_newline = 1;
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break;
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}
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cmdline[pos++] = c;
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}
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cmdline[pos] = '\0';
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/* If the buffer is empty, don't return anything at all. */
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if (pos == 0 && !have_newline)
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{
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grub_free (cmdline);
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cmdline = 0;
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}
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return cmdline;
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}
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void
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grub_normal_free_menu (grub_menu_t menu)
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{
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grub_menu_entry_t entry = menu->entry_list;
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while (entry)
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{
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grub_menu_entry_t next_entry = entry->next;
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grub_size_t i;
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if (entry->classes)
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{
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struct grub_menu_entry_class *class;
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for (class = entry->classes; class; class = class->next)
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grub_free (class->name);
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grub_free (entry->classes);
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}
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if (entry->args)
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{
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for (i = 0; entry->args[i]; i++)
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grub_free (entry->args[i]);
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grub_free (entry->args);
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}
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grub_free ((void *) entry->id);
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grub_free ((void *) entry->users);
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grub_free ((void *) entry->title);
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grub_free ((void *) entry->sourcecode);
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entry = next_entry;
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}
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grub_free (menu);
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grub_env_unset_menu ();
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}
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static grub_menu_t
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read_config_file (const char *config)
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{
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grub_file_t file;
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const char *old_file, *old_dir;
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char *config_dir, *ptr = 0;
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auto grub_err_t getline (char **line, int cont);
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grub_err_t getline (char **line, int cont __attribute__ ((unused)))
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{
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while (1)
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{
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char *buf;
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*line = buf = grub_file_getline (file);
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if (! buf)
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return grub_errno;
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if (buf[0] == '#')
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grub_free (*line);
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else
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break;
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}
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return GRUB_ERR_NONE;
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}
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grub_menu_t newmenu;
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newmenu = grub_env_get_menu ();
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if (! newmenu)
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{
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newmenu = grub_zalloc (sizeof (*newmenu));
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if (! newmenu)
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return 0;
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grub_env_set_menu (newmenu);
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}
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/* Try to open the config file. */
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file = grub_file_open (config);
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if (! file)
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return 0;
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old_file = grub_env_get ("config_file");
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old_dir = grub_env_get ("config_directory");
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grub_env_set ("config_file", config);
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config_dir = grub_strdup (config);
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if (config_dir)
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ptr = grub_strrchr (config_dir, '/');
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if (ptr)
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*ptr = 0;
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grub_env_set ("config_directory", config_dir);
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grub_env_export ("config_file");
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grub_env_export ("config_directory");
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while (1)
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{
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char *line;
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/* Print an error, if any. */
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grub_print_error ();
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grub_errno = GRUB_ERR_NONE;
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if ((getline (&line, 0)) || (! line))
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break;
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grub_normal_parse_line (line, getline);
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grub_free (line);
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}
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if (old_file)
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grub_env_set ("config_file", old_file);
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else
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grub_env_unset ("config_file");
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if (old_dir)
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grub_env_set ("config_directory", old_dir);
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else
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grub_env_unset ("config_directory");
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grub_file_close (file);
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return newmenu;
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}
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/* Initialize the screen. */
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void
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grub_normal_init_page (struct grub_term_output *term)
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{
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grub_ssize_t msg_len;
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int posx;
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const char *msg = _("GNU GRUB version %s");
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char *msg_formatted;
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grub_uint32_t *unicode_msg;
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grub_uint32_t *last_position;
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grub_term_cls (term);
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msg_formatted = grub_xasprintf (msg, PACKAGE_VERSION);
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if (!msg_formatted)
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return;
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msg_len = grub_utf8_to_ucs4_alloc (msg_formatted,
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&unicode_msg, &last_position);
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grub_free (msg_formatted);
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if (msg_len < 0)
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{
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return;
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}
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posx = grub_getstringwidth (unicode_msg, last_position, term);
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posx = (grub_term_width (term) - posx) / 2;
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grub_term_gotoxy (term, posx, 1);
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grub_print_ucs4 (unicode_msg, last_position, 0, 0, term);
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grub_putcode ('\n', term);
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grub_putcode ('\n', term);
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grub_free (unicode_msg);
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}
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static void
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read_lists (const char *val)
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{
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if (! grub_no_autoload)
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{
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read_command_list (val);
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read_fs_list (val);
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read_crypto_list (val);
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read_terminal_list (val);
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}
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grub_gettext_reread_prefix (val);
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}
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static char *
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read_lists_hook (struct grub_env_var *var __attribute__ ((unused)),
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const char *val)
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{
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read_lists (val);
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return val ? grub_strdup (val) : NULL;
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}
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/* Read the config file CONFIG and execute the menu interface or
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the command line interface if BATCH is false. */
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void
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grub_normal_execute (const char *config, int nested, int batch)
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{
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grub_menu_t menu = 0;
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const char *prefix;
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if (! nested)
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{
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prefix = grub_env_get ("prefix");
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read_lists (prefix);
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grub_register_variable_hook ("prefix", NULL, read_lists_hook);
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}
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if (config)
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{
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menu = read_config_file (config);
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/* Ignore any error. */
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grub_errno = GRUB_ERR_NONE;
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}
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if (! batch)
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{
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if (menu && menu->size)
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{
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grub_show_menu (menu, nested, 0);
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if (nested)
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grub_normal_free_menu (menu);
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}
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}
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}
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/* This starts the normal mode. */
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void
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grub_enter_normal_mode (const char *config)
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{
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nested_level++;
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grub_normal_execute (config, 0, 0);
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grub_cmdline_run (0);
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nested_level--;
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if (grub_normal_exit_level)
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grub_normal_exit_level--;
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}
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/* Enter normal mode from rescue mode. */
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static grub_err_t
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grub_cmd_normal (struct grub_command *cmd __attribute__ ((unused)),
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int argc, char *argv[])
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{
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if (argc == 0)
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{
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/* Guess the config filename. It is necessary to make CONFIG static,
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so that it won't get broken by longjmp. */
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char *config;
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const char *prefix;
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prefix = grub_env_get ("prefix");
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if (prefix)
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{
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config = grub_xasprintf ("%s/grub.cfg", prefix);
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if (! config)
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goto quit;
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grub_enter_normal_mode (config);
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grub_free (config);
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}
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else
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grub_enter_normal_mode (0);
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}
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else
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grub_enter_normal_mode (argv[0]);
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quit:
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return 0;
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}
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/* Exit from normal mode to rescue mode. */
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static grub_err_t
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grub_cmd_normal_exit (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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if (nested_level <= grub_normal_exit_level)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "not in normal environment");
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grub_normal_exit_level++;
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return GRUB_ERR_NONE;
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}
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static grub_err_t
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grub_normal_reader_init (int nested)
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{
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struct grub_term_output *term;
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const char *msg = _("Minimal BASH-like line editing is supported. For "
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"the first word, TAB lists possible command completions. Anywhere "
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"else TAB lists possible device or file completions. %s");
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const char *msg_esc = _("ESC at any time exits.");
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char *msg_formatted;
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msg_formatted = grub_xasprintf (msg, nested ? msg_esc : "");
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if (!msg_formatted)
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return grub_errno;
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FOR_ACTIVE_TERM_OUTPUTS(term)
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{
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grub_normal_init_page (term);
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grub_term_setcursor (term, 1);
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grub_print_message_indented (msg_formatted, 3, STANDARD_MARGIN, term);
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grub_putcode ('\n', term);
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grub_putcode ('\n', term);
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}
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grub_free (msg_formatted);
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return 0;
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}
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static grub_err_t
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grub_normal_read_line_real (char **line, int cont, int nested)
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{
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const char *prompt;
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if (cont)
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/* TRANSLATORS: it's command line prompt. */
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prompt = _(">");
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else
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/* TRANSLATORS: it's command line prompt. */
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prompt = _("grub>");
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if (!prompt)
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return grub_errno;
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while (1)
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{
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*line = grub_cmdline_get (prompt);
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if (*line)
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return 0;
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if (cont || nested)
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{
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grub_free (*line);
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*line = 0;
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return grub_errno;
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}
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}
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}
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static grub_err_t
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grub_normal_read_line (char **line, int cont)
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{
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return grub_normal_read_line_real (line, cont, 0);
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}
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void
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grub_cmdline_run (int nested)
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{
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grub_err_t err = GRUB_ERR_NONE;
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err = grub_auth_check_authentication (NULL);
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if (err)
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{
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grub_print_error ();
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grub_errno = GRUB_ERR_NONE;
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return;
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}
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grub_normal_reader_init (nested);
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while (1)
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{
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char *line;
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if (grub_normal_exit_level)
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break;
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/* Print an error, if any. */
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grub_print_error ();
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grub_errno = GRUB_ERR_NONE;
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grub_normal_read_line_real (&line, 0, nested);
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if (! line)
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break;
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grub_normal_parse_line (line, grub_normal_read_line);
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grub_free (line);
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}
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}
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static char *
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grub_env_write_pager (struct grub_env_var *var __attribute__ ((unused)),
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const char *val)
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{
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grub_set_more ((*val == '1'));
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return grub_strdup (val);
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}
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/* clear */
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static grub_err_t
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grub_mini_cmd_clear (struct grub_command *cmd __attribute__ ((unused)),
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int argc __attribute__ ((unused)),
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char *argv[] __attribute__ ((unused)))
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{
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grub_cls ();
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return 0;
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}
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static grub_command_t cmd_clear;
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static void (*grub_xputs_saved) (const char *str);
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static const char *features[] = {
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"feature_chainloader_bpb", "feature_ntldr", "feature_platform_search_hint",
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"feature_default_font_path", "feature_all_video_module",
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"feature_menuentry_id", "feature_menuentry_options"
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};
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GRUB_MOD_INIT(normal)
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{
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unsigned i;
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/* Previously many modules depended on gzio. Be nice to user and load it. */
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grub_dl_load ("gzio");
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grub_normal_auth_init ();
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grub_context_init ();
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grub_script_init ();
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grub_menu_init ();
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grub_xputs_saved = grub_xputs;
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grub_xputs = grub_xputs_normal;
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/* Normal mode shouldn't be unloaded. */
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if (mod)
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grub_dl_ref (mod);
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cmd_clear =
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grub_register_command ("clear", grub_mini_cmd_clear,
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0, N_("Clear the screen."));
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grub_set_history (GRUB_DEFAULT_HISTORY_SIZE);
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grub_register_variable_hook ("pager", 0, grub_env_write_pager);
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grub_env_export ("pager");
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/* Register a command "normal" for the rescue mode. */
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grub_register_command ("normal", grub_cmd_normal,
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0, N_("Enter normal mode."));
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grub_register_command ("normal_exit", grub_cmd_normal_exit,
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0, N_("Exit from normal mode."));
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/* Reload terminal colors when these variables are written to. */
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grub_register_variable_hook ("color_normal", NULL, grub_env_write_color_normal);
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grub_register_variable_hook ("color_highlight", NULL, grub_env_write_color_highlight);
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/* Preserve hooks after context changes. */
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grub_env_export ("color_normal");
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grub_env_export ("color_highlight");
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/* Set default color names. */
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grub_env_set ("color_normal", "white/black");
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grub_env_set ("color_highlight", "black/white");
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for (i = 0; i < ARRAY_SIZE (features); i++)
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{
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grub_env_set (features[i], "y");
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grub_env_export (features[i]);
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}
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grub_env_set ("grub_cpu", GRUB_TARGET_CPU);
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grub_env_export ("grub_cpu");
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grub_env_set ("grub_platform", GRUB_PLATFORM);
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grub_env_export ("grub_platform");
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}
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GRUB_MOD_FINI(normal)
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{
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grub_context_fini ();
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grub_script_fini ();
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grub_menu_fini ();
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grub_normal_auth_fini ();
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grub_xputs = grub_xputs_saved;
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grub_set_history (0);
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grub_register_variable_hook ("pager", 0, 0);
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grub_fs_autoload_hook = 0;
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grub_unregister_command (cmd_clear);
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|
}
|