285 lines
6.8 KiB
C
285 lines
6.8 KiB
C
/* menuentry.c - menuentry command */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2010 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/types.h>
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#include <grub/misc.h>
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#include <grub/err.h>
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#include <grub/dl.h>
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#include <grub/extcmd.h>
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#include <grub/i18n.h>
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#include <grub/normal.h>
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static const struct grub_arg_option options[] =
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{
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{"class", 1, GRUB_ARG_OPTION_REPEATABLE,
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N_("Menu entry type."), "STRING", ARG_TYPE_STRING},
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{"users", 2, 0,
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N_("Users allowed to boot this entry."), "USERNAME", ARG_TYPE_STRING},
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{"hotkey", 3, 0,
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N_("Keyboard key for this entry."), "KEY", ARG_TYPE_STRING},
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{"source", 4, 0,
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N_("Menu entry definition as a string."), "STRING", ARG_TYPE_STRING},
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{0, 0, 0, 0, 0, 0}
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};
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static struct
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{
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char *name;
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int key;
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} hotkey_aliases[] =
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{
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{"backspace", '\b'},
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{"tab", '\t'},
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{"delete", GRUB_TERM_DC}
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};
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/* Add a menu entry to the current menu context (as given by the environment
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variable data slot `menu'). As the configuration file is read, the script
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parser calls this when a menu entry is to be created. */
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static grub_err_t
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append_menu_entry (int argc, const char **args, char **classes,
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const char *users, const char *hotkey,
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const char *prefix, const char *sourcecode)
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{
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unsigned i;
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int menu_hotkey = 0;
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char **menu_args = NULL;
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char *menu_users = NULL;
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char *menu_title = NULL;
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char *menu_sourcecode = NULL;
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struct grub_menu_entry_class *menu_classes = NULL;
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grub_menu_t menu;
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grub_menu_entry_t *last;
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menu = grub_env_get_menu ();
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if (! menu)
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return grub_error (GRUB_ERR_MENU, "no menu context");
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last = &menu->entry_list;
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menu_sourcecode = grub_xasprintf ("%s%s", prefix ?: "", sourcecode);
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if (! menu_sourcecode)
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return grub_errno;
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if (classes)
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{
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for (i = 0; classes[i]; i++); /* count # of menuentry classes */
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menu_classes = grub_zalloc (sizeof (struct grub_menu_entry_class) * i);
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if (! menu_classes)
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goto fail;
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for (i = 0; classes[i]; i++)
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{
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menu_classes[i].name = grub_strdup (classes[i]);
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if (! menu_classes[i].name)
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goto fail;
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menu_classes[i].next = classes[i + 1] ? &menu_classes[i + 1] : NULL;
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}
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}
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if (users)
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{
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menu_users = grub_strdup (users);
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if (! menu_users)
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goto fail;
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}
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if (hotkey)
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{
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for (i = 0; i < ARRAY_SIZE (hotkey_aliases); i++)
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if (grub_strcmp (hotkey, hotkey_aliases[i].name) == 0)
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{
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menu_hotkey = hotkey_aliases[i].key;
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break;
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}
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if (i == ARRAY_SIZE (hotkey_aliases))
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menu_hotkey = hotkey[0];
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}
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if (! argc)
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{
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grub_error (GRUB_ERR_MENU, "menuentry is missing title");
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goto fail;
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}
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menu_title = grub_strdup (args[0]);
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if (! menu_title)
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goto fail;
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/* Save argc, args to pass as parameters to block arg later. */
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menu_args = grub_malloc (sizeof (char*) * (argc + 1));
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if (! menu_args)
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goto fail;
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for (i = 0; i < argc; i++)
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{
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menu_args[i] = grub_strdup (args[i]);
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if (! menu_args[i])
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goto fail;
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}
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menu_args[argc] = NULL;
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/* Add the menu entry at the end of the list. */
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while (*last)
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last = &(*last)->next;
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*last = grub_zalloc (sizeof (**last));
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if (! *last)
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goto fail;
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(*last)->title = menu_title;
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(*last)->hotkey = menu_hotkey;
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(*last)->classes = menu_classes;
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if (menu_users)
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(*last)->restricted = 1;
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(*last)->users = menu_users;
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(*last)->argc = argc;
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(*last)->args = menu_args;
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(*last)->sourcecode = menu_sourcecode;
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menu->size++;
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return GRUB_ERR_NONE;
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fail:
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grub_free (menu_sourcecode);
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for (i = 0; menu_classes && menu_classes[i].name; i++)
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grub_free (menu_classes[i].name);
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grub_free (menu_classes);
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for (i = 0; menu_args && menu_args[i]; i++)
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grub_free (menu_args[i]);
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grub_free (menu_args);
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grub_free (menu_users);
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grub_free (menu_title);
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return grub_errno;
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}
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static char *
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setparams_prefix (int argc, char **args)
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{
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int i;
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int j;
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char *p;
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char *result;
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grub_size_t len = 10;
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static const char *escape_characters = "\"\\";
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auto char *strescpy (char *, const char *, const char *);
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char * strescpy (char *d, const char *s, const char *escapes)
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{
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while (*s)
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{
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if (grub_strchr (escapes, *s))
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*d++ = '\\';
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*d++ = *s++;
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}
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*d = '\0';
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return d;
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}
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/* Count resulting string length */
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for (i = 0; i < argc; i++)
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{
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len += 3; /* 3 = 1 space + 2 quotes */
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p = args[i];
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while (*p)
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len += grub_strchr (escape_characters, *p++) ? 2 : 1;
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}
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result = grub_malloc (len + 2);
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if (! result)
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return 0;
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grub_strcpy (result, "setparams");
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i = 9;
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for (j = 0; j < argc; j++)
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{
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result[i++] = ' ';
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result[i++] = '"';
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i = strescpy (result + i, args[j], escape_characters) - result;
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result[i++] = '"';
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}
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result[i++] = '\n';
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result[i] = '\0';
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return result;
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}
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static grub_err_t
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grub_cmd_menuentry (grub_extcmd_context_t ctxt, int argc, char **args)
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{
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char ch;
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char *src;
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char *prefix;
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unsigned len;
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grub_err_t r;
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if (! argc)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "missing arguments");
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if (ctxt->state[3].set && ctxt->script)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "multiple menuentry definitions");
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if (! ctxt->state[3].set && ! ctxt->script)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "no menuentry definition");
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if (! ctxt->script)
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return append_menu_entry (argc, (const char **) args,
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ctxt->state[0].args, ctxt->state[1].arg,
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ctxt->state[2].arg, 0, ctxt->state[3].arg);
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src = args[argc - 1];
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args[argc - 1] = NULL;
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len = grub_strlen(src);
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ch = src[len - 1];
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src[len - 1] = '\0';
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prefix = setparams_prefix (argc - 1, args);
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if (! prefix)
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return grub_errno;
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r = append_menu_entry (argc - 1, (const char **) args,
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ctxt->state[0].args, ctxt->state[1].arg,
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ctxt->state[2].arg, prefix, src + 1);
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src[len - 1] = ch;
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args[argc - 1] = src;
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grub_free (prefix);
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return r;
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}
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static grub_extcmd_t cmd;
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void
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grub_menu_init (void)
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{
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cmd = grub_register_extcmd ("menuentry", grub_cmd_menuentry,
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GRUB_COMMAND_FLAG_BOTH | GRUB_COMMAND_FLAG_BLOCKS,
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N_("BLOCK"), N_("Define a menuentry."), options);
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}
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void
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grub_menu_fini (void)
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{
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grub_unregister_extcmd (cmd);
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}
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