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/* console.c -- console for GRUB. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2013 Free Software Foundation, Inc.
*
* GRUB is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GRUB is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <config-util.h>
#include <grub/term.h>
#include <grub/types.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/time.h>
#include <grub/terminfo.h>
#include <grub/dl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <termios.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <langinfo.h>
#include <grub/emu/console.h>
extern struct grub_terminfo_output_state grub_console_terminfo_output;
static int original_fl;
static int saved_orig;
static struct termios orig_tty;
static struct termios new_tty;
static void
put (struct grub_term_output *term __attribute__ ((unused)), const int c)
{
char chr = c;
ssize_t actual;
actual = write (STDOUT_FILENO, &chr, 1);
if (actual < 1)
{
/* We cannot do anything about this, but some systems require us to at
least pretend to check the result. */
}
}
static int
readkey (struct grub_term_input *term __attribute__ ((unused)))
{
grub_uint8_t c;
ssize_t actual;
actual = read (STDIN_FILENO, &c, 1);
if (actual > 0)
return c;
return -1;
}
static grub_err_t
grub_console_init_input (struct grub_term_input *term)
{
if (!saved_orig)
{
original_fl = fcntl (STDIN_FILENO, F_GETFL);
fcntl (STDIN_FILENO, F_SETFL, original_fl | O_NONBLOCK);
}
saved_orig = 1;
tcgetattr(STDIN_FILENO, &orig_tty);
new_tty = orig_tty;
new_tty.c_lflag &= ~(ICANON | ECHO);
new_tty.c_cc[VMIN] = 1;
tcsetattr(STDIN_FILENO, TCSANOW, &new_tty);
return grub_terminfo_input_init (term);
}
static grub_err_t
grub_console_fini_input (struct grub_term_input *term
__attribute__ ((unused)))
{
fcntl (STDIN_FILENO, F_SETFL, original_fl);
tcsetattr(STDIN_FILENO, TCSANOW, &orig_tty);
saved_orig = 0;
return GRUB_ERR_NONE;
}
static grub_err_t
grub_console_init_output (struct grub_term_output *term)
{
struct winsize size;
if (ioctl (STDOUT_FILENO, TIOCGWINSZ, &size) >= 0)
{
grub_console_terminfo_output.size.x = size.ws_col;
grub_console_terminfo_output.size.y = size.ws_row;
}
else
{
grub_console_terminfo_output.size.x = 80;
grub_console_terminfo_output.size.y = 24;
}
grub_terminfo_output_init (term);
return 0;
}
struct grub_terminfo_input_state grub_console_terminfo_input =
{
.readkey = readkey
};
struct grub_terminfo_output_state grub_console_terminfo_output =
{
.put = put,
.size = { 80, 24 }
};
static struct grub_term_input grub_console_term_input =
{
.name = "console",
.init = grub_console_init_input,
.fini = grub_console_fini_input,
.getkey = grub_terminfo_getkey,
.data = &grub_console_terminfo_input
};
static struct grub_term_output grub_console_term_output =
{
.name = "console",
.init = grub_console_init_output,
.putchar = grub_terminfo_putchar,
.getxy = grub_terminfo_getxy,
.getwh = grub_terminfo_getwh,
.gotoxy = grub_terminfo_gotoxy,
.cls = grub_terminfo_cls,
.setcolorstate = grub_terminfo_setcolorstate,
.setcursor = grub_terminfo_setcursor,
.data = &grub_console_terminfo_output,
.progress_update_divisor = GRUB_PROGRESS_FAST
};
void
grub_console_init (void)
{
const char *cs = nl_langinfo (CODESET);
if (cs && grub_strcasecmp (cs, "UTF-8"))
grub_console_term_output.flags = GRUB_TERM_CODE_TYPE_UTF8_LOGICAL;
else
grub_console_term_output.flags = GRUB_TERM_CODE_TYPE_ASCII;
grub_term_register_input ("console", &grub_console_term_input);
grub_term_register_output ("console", &grub_console_term_output);
grub_terminfo_init ();
grub_terminfo_output_register (&grub_console_term_output, "vt100-color");
}
void
grub_console_fini (void)
{
if (saved_orig)
{
fcntl (STDIN_FILENO, F_SETFL, original_fl);
tcsetattr(STDIN_FILENO, TCSANOW, &orig_tty);
}
saved_orig = 0;
}
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