189 lines
4.8 KiB
C
189 lines
4.8 KiB
C
/* terminfo.c - simple terminfo module */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2003,2004,2005 Free Software Foundation, Inc.
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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* This file contains various functions dealing with different
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* terminal capabilities. For example, vt52 and vt100.
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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/mm.h>
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#include <grub/err.h>
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#include <grub/dl.h>
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#include <grub/normal.h>
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#include <grub/term.h>
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#include <grub/terminfo.h>
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#include <grub/tparm.h>
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struct terminfo
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{
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char *name;
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char *gotoxy;
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char *cls;
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char *reverse_video_on;
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char *reverse_video_off;
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char *cursor_on;
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char *cursor_off;
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};
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static struct terminfo term;
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/* Get current terminfo name. */
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char *
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grub_terminfo_get_current (void)
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{
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return term.name;
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}
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/* Free *PTR and set *PTR to NULL, to prevent double-free. */
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static void
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grub_terminfo_free (char **ptr)
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{
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grub_free (*ptr);
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*ptr = 0;
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}
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/* Set current terminfo type. */
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grub_err_t
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grub_terminfo_set_current (const char *str)
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{
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/* TODO
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* Lookup user specified terminfo type. If found, set term variables
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* as appropriate. Otherwise return an error.
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*
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* How should this be done?
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* a. A static table included in this module.
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* - I do not like this idea.
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* b. A table stored in the configuration directory.
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* - Users must convert their terminfo settings if we have not already.
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* c. Look for terminfo files in the configuration directory.
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* - /usr/share/terminfo is 6.3M on my system.
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* - /usr/share/terminfo is not on most users boot partition.
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* + Copying the terminfo files you want to use to the grub
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* configuration directory is easier then (b).
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* d. Your idea here.
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*/
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/* Free previously allocated memory. */
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grub_terminfo_free (&term.name);
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grub_terminfo_free (&term.gotoxy);
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grub_terminfo_free (&term.cls);
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grub_terminfo_free (&term.reverse_video_on);
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grub_terminfo_free (&term.reverse_video_off);
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grub_terminfo_free (&term.cursor_on);
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grub_terminfo_free (&term.cursor_off);
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if (grub_strcmp ("vt100", str) == 0)
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{
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term.name = grub_strdup ("vt100");
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term.gotoxy = grub_strdup ("\e[%i%p1%d;%p2%dH");
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term.cls = grub_strdup ("\e[H\e[J");
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term.reverse_video_on = grub_strdup ("\e[7m");
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term.reverse_video_off = grub_strdup ("\e[m");
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term.cursor_on = grub_strdup ("\e[?25l");
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term.cursor_off = grub_strdup ("\e[?25h");
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return grub_errno;
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}
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "unknown terminfo type.");
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}
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/* Wrapper for grub_putchar to write strings. */
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static void
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putstr (const char *str)
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{
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while (*str)
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grub_putchar (*str++);
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}
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/* Move the cursor to the given position starting with "0". */
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void
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grub_terminfo_gotoxy (grub_uint8_t x, grub_uint8_t y)
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{
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putstr (grub_terminfo_tparm (term.gotoxy, y, x));
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}
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/* Clear the screen. */
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void
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grub_terminfo_cls (void)
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{
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putstr (grub_terminfo_tparm (term.cls));
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}
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/* Set reverse video mode on. */
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void
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grub_terminfo_reverse_video_on (void)
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{
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putstr (grub_terminfo_tparm (term.reverse_video_on));
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}
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/* Set reverse video mode off. */
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void
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grub_terminfo_reverse_video_off (void)
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{
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putstr (grub_terminfo_tparm (term.reverse_video_off));
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}
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/* Show cursor. */
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void
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grub_terminfo_cursor_on (void)
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{
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putstr (grub_terminfo_tparm (term.cursor_on));
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}
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/* Hide cursor. */
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void
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grub_terminfo_cursor_off (void)
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{
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putstr (grub_terminfo_tparm (term.cursor_off));
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}
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/* GRUB Command. */
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static grub_err_t
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grub_cmd_terminfo (struct grub_arg_list *state __attribute__ ((unused)),
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int argc, char **args)
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{
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if (argc == 0)
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{
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grub_printf ("Current terminfo type: %s\n", grub_terminfo_get_current());
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return GRUB_ERR_NONE;
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}
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else if (argc != 1)
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return grub_error (GRUB_ERR_BAD_ARGUMENT, "too many parameters.");
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else
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return grub_terminfo_set_current (args[0]);
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}
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GRUB_MOD_INIT
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{
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(void) mod; /* To stop warning. */
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grub_register_command ("terminfo", grub_cmd_terminfo, GRUB_COMMAND_FLAG_BOTH,
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"terminfo [TERM]", "Set terminfo type.", 0);
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grub_terminfo_set_current ("vt100");
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}
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GRUB_MOD_FINI
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{
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grub_unregister_command ("terminfo");
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}
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