179 lines
4.3 KiB
C
179 lines
4.3 KiB
C
/* console.c -- console for GRUB. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2013 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 <config.h>
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#include <config-util.h>
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#include <grub/term.h>
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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/time.h>
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#include <grub/terminfo.h>
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#include <grub/dl.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <termios.h>
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#include <stdlib.h>
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#include <sys/ioctl.h>
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#include <langinfo.h>
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#include <grub/emu/console.h>
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extern struct grub_terminfo_output_state grub_console_terminfo_output;
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static int original_fl;
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static int saved_orig;
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static struct termios orig_tty;
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static struct termios new_tty;
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static void
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put (struct grub_term_output *term __attribute__ ((unused)), const int c)
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{
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char chr = c;
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write (STDOUT_FILENO, &chr, 1);
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}
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static int
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readkey (struct grub_term_input *term __attribute__ ((unused)))
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{
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grub_uint8_t c;
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ssize_t actual;
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actual = read (STDIN_FILENO, &c, 1);
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if (actual > 0)
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return c;
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return -1;
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}
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static grub_err_t
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grub_console_init_input (struct grub_term_input *term)
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{
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if (!saved_orig)
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{
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original_fl = fcntl (STDIN_FILENO, F_GETFL);
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fcntl (STDIN_FILENO, F_SETFL, original_fl | O_NONBLOCK);
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}
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saved_orig = 1;
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tcgetattr(STDIN_FILENO, &orig_tty);
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new_tty = orig_tty;
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new_tty.c_lflag &= ~(ICANON | ECHO);
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new_tty.c_cc[VMIN] = 1;
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tcsetattr(STDIN_FILENO, TCSANOW, &new_tty);
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return grub_terminfo_input_init (term);
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}
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static grub_err_t
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grub_console_fini_input (struct grub_term_input *term
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__attribute__ ((unused)))
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{
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fcntl (STDIN_FILENO, F_SETFL, original_fl);
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tcsetattr(STDIN_FILENO, TCSANOW, &orig_tty);
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saved_orig = 0;
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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_console_init_output (struct grub_term_output *term)
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{
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struct winsize size;
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if (ioctl (STDOUT_FILENO, TIOCGWINSZ, &size) >= 0)
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{
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grub_console_terminfo_output.width = size.ws_col;
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grub_console_terminfo_output.height = size.ws_row;
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}
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else
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{
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grub_console_terminfo_output.width = 80;
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grub_console_terminfo_output.height = 24;
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}
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grub_terminfo_output_init (term);
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return 0;
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}
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struct grub_terminfo_input_state grub_console_terminfo_input =
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{
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.readkey = readkey
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};
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struct grub_terminfo_output_state grub_console_terminfo_output =
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{
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.put = put,
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.width = 80,
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.height = 24
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};
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static struct grub_term_input grub_console_term_input =
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{
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.name = "console",
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.init = grub_console_init_input,
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.fini = grub_console_fini_input,
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.getkey = grub_terminfo_getkey,
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.data = &grub_console_terminfo_input
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};
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static struct grub_term_output grub_console_term_output =
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{
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.name = "console",
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.init = grub_console_init_output,
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.putchar = grub_terminfo_putchar,
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.getxy = grub_terminfo_getxy,
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.getwh = grub_terminfo_getwh,
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.gotoxy = grub_terminfo_gotoxy,
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.cls = grub_terminfo_cls,
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.setcolorstate = grub_terminfo_setcolorstate,
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.setcursor = grub_terminfo_setcursor,
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.data = &grub_console_terminfo_output,
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};
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void
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grub_console_init (void)
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{
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const char *cs = nl_langinfo (CODESET);
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if (cs && grub_strcasecmp (cs, "UTF-8"))
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grub_console_term_output.flags = GRUB_TERM_CODE_TYPE_UTF8_LOGICAL;
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else
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grub_console_term_output.flags = GRUB_TERM_CODE_TYPE_ASCII;
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grub_term_register_input ("console", &grub_console_term_input);
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grub_term_register_output ("console", &grub_console_term_output);
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grub_terminfo_init ();
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grub_terminfo_output_register (&grub_console_term_output, "vt100-color");
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}
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void
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grub_console_fini (void)
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{
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if (saved_orig)
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{
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fcntl (STDIN_FILENO, F_SETFL, original_fl);
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tcsetattr(STDIN_FILENO, TCSANOW, &orig_tty);
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}
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saved_orig = 0;
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}
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