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BVK Chaitanya
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265d68cd10
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810 changed files with 4980 additions and 2508 deletions
246
grub-core/commands/terminal.c
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246
grub-core/commands/terminal.c
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009,2010 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/mm.h>
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#include <grub/dl.h>
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#include <grub/command.h>
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#include <grub/term.h>
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#include <grub/i18n.h>
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#include <grub/misc.h>
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struct grub_term_autoload *grub_term_input_autoload = NULL;
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struct grub_term_autoload *grub_term_output_autoload = NULL;
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struct abstract_terminal
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{
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struct abstract_terminal *next;
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const char *name;
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grub_err_t (*init) (void);
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grub_err_t (*fini) (void);
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};
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static grub_err_t
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handle_command (int argc, char **args, struct abstract_terminal **enabled,
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struct abstract_terminal **disabled,
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struct grub_term_autoload *autoloads,
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const char *active_str,
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const char *available_str)
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{
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int i;
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struct abstract_terminal *term;
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struct grub_term_autoload *aut;
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if (argc == 0)
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{
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grub_puts_ (active_str);
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for (term = *enabled; term; term = term->next)
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grub_printf ("%s ", term->name);
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grub_printf ("\n");
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grub_puts_ (available_str);
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for (term = *disabled; term; term = term->next)
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grub_printf ("%s ", term->name);
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/* This is quadratic but we don't expect mode than 30 terminal
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modules ever. */
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for (aut = autoloads; aut; aut = aut->next)
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{
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for (term = *disabled; term; term = term->next)
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if (grub_strcmp (term->name, aut->name) == 0)
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break;
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if (!term)
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for (term = *enabled; term; term = term->next)
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if (grub_strcmp (term->name, aut->name) == 0)
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break;
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if (!term)
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grub_printf ("%s ", aut->name);
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}
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grub_printf ("\n");
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return GRUB_ERR_NONE;
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}
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i = 0;
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if (grub_strcmp (args[0], "--append") == 0
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|| grub_strcmp (args[0], "--remove") == 0)
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i++;
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if (i == argc)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, N_ ("no terminal specified"));
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for (; i < argc; i++)
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{
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int again = 0;
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while (1)
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{
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for (term = *disabled; term; term = term->next)
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if (grub_strcmp (args[i], term->name) == 0)
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break;
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if (term == 0)
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for (term = *enabled; term; term = term->next)
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if (grub_strcmp (args[i], term->name) == 0)
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break;
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if (term)
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break;
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if (again)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "unknown terminal '%s'\n",
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args[i]);
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for (aut = autoloads; aut; aut = aut->next)
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if (grub_strcmp (args[i], aut->name) == 0)
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{
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grub_dl_t mod;
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mod = grub_dl_load (aut->modname);
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if (mod)
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grub_dl_ref (mod);
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grub_errno = GRUB_ERR_NONE;
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break;
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}
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if (!aut)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "unknown terminal '%s'\n",
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args[i]);
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again = 1;
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}
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}
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if (grub_strcmp (args[0], "--append") == 0)
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{
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for (i = 1; i < argc; i++)
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{
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for (term = *disabled; term; term = term->next)
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if (grub_strcmp (args[i], term->name) == 0)
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break;
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if (term)
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{
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if (term->init && term->init () != GRUB_ERR_NONE)
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return grub_errno;
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grub_list_remove (GRUB_AS_LIST_P (disabled), GRUB_AS_LIST (term));
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grub_list_push (GRUB_AS_LIST_P (enabled), GRUB_AS_LIST (term));
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}
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}
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return GRUB_ERR_NONE;
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}
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if (grub_strcmp (args[0], "--remove") == 0)
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{
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for (i = 1; i < argc; i++)
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{
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for (term = *enabled; term; term = term->next)
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if (grub_strcmp (args[i], term->name) == 0)
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break;
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if (term)
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{
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if (!term->next && term == *enabled)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"can't remove the last terminal");
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grub_list_remove (GRUB_AS_LIST_P (enabled), GRUB_AS_LIST (term));
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if (term->fini)
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term->fini ();
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grub_list_push (GRUB_AS_LIST_P (disabled), GRUB_AS_LIST (term));
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}
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}
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return GRUB_ERR_NONE;
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}
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for (i = 0; i < argc; i++)
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{
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for (term = *disabled; term; term = term->next)
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if (grub_strcmp (args[i], term->name) == 0)
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break;
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if (term)
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{
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if (term->init && term->init () != GRUB_ERR_NONE)
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return grub_errno;
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grub_list_remove (GRUB_AS_LIST_P (disabled), GRUB_AS_LIST (term));
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grub_list_push (GRUB_AS_LIST_P (enabled), GRUB_AS_LIST (term));
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}
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}
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{
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struct abstract_terminal *next;
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for (term = *enabled; term; term = next)
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{
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next = term->next;
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for (i = 0; i < argc; i++)
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if (grub_strcmp (args[i], term->name) == 0)
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break;
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if (i == argc)
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{
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if (!term->next && term == *enabled)
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return grub_error (GRUB_ERR_BAD_ARGUMENT,
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"can't remove the last terminal");
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grub_list_remove (GRUB_AS_LIST_P (enabled), GRUB_AS_LIST (term));
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if (term->fini)
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term->fini ();
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grub_list_push (GRUB_AS_LIST_P (disabled), GRUB_AS_LIST (term));
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}
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}
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}
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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_cmd_terminal_input (grub_command_t cmd __attribute__ ((unused)),
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int argc, char **args)
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{
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(void) GRUB_FIELD_MATCH (grub_term_inputs, struct abstract_terminal *, next);
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(void) GRUB_FIELD_MATCH (grub_term_inputs, struct abstract_terminal *, name);
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(void) GRUB_FIELD_MATCH (grub_term_inputs, struct abstract_terminal *, init);
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(void) GRUB_FIELD_MATCH (grub_term_inputs, struct abstract_terminal *, fini);
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return handle_command (argc, args,
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(struct abstract_terminal **) &grub_term_inputs,
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(struct abstract_terminal **) &grub_term_inputs_disabled,
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grub_term_input_autoload,
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N_ ("Active input terminals:"),
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N_ ("Available input terminals:"));
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}
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static grub_err_t
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grub_cmd_terminal_output (grub_command_t cmd __attribute__ ((unused)),
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int argc, char **args)
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{
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(void) GRUB_FIELD_MATCH (grub_term_outputs, struct abstract_terminal *, next);
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(void) GRUB_FIELD_MATCH (grub_term_outputs, struct abstract_terminal *, name);
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(void) GRUB_FIELD_MATCH (grub_term_outputs, struct abstract_terminal *, init);
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(void) GRUB_FIELD_MATCH (grub_term_outputs, struct abstract_terminal *, fini);
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return handle_command (argc, args, (struct abstract_terminal **) &grub_term_outputs,
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(struct abstract_terminal **) &grub_term_outputs_disabled,
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grub_term_output_autoload,
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N_ ("Active output terminals:"),
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N_ ("Available output terminals:"));
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}
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static grub_command_t cmd_terminal_input, cmd_terminal_output;
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GRUB_MOD_INIT(terminal)
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{
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cmd_terminal_input =
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grub_register_command ("terminal_input", grub_cmd_terminal_input,
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N_("[--append|--remove] "
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"[TERMINAL1] [TERMINAL2] ..."),
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N_("List or select an input terminal."));
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cmd_terminal_output =
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grub_register_command ("terminal_output", grub_cmd_terminal_output,
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N_("[--append|--remove] "
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"[TERMINAL1] [TERMINAL2] ..."),
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N_("List or select an output terminal."));
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}
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GRUB_MOD_FINI(terminal)
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{
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grub_unregister_command (cmd_terminal_input);
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grub_unregister_command (cmd_terminal_output);
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}
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