diff options
Diffstat (limited to 'grub-core/osdep/unix/emuconsole.c')
| -rw-r--r-- | grub-core/osdep/unix/emuconsole.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/grub-core/osdep/unix/emuconsole.c b/grub-core/osdep/unix/emuconsole.c new file mode 100644 index 0000000..7308798 --- /dev/null +++ b/grub-core/osdep/unix/emuconsole.c @@ -0,0 +1,184 @@ +/* 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; +} |