| /* rescue_reader.c - rescue mode reader */ |
| /* |
| * GRUB -- GRand Unified Bootloader |
| * Copyright (C) 2009 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 <grub/types.h> |
| #include <grub/reader.h> |
| #include <grub/misc.h> |
| #include <grub/term.h> |
| |
| #define GRUB_RESCUE_BUF_SIZE 256 |
| |
| static char linebuf[GRUB_RESCUE_BUF_SIZE]; |
| |
| static grub_err_t |
| grub_rescue_init (void) |
| { |
| grub_printf ("Entering rescue mode...\n"); |
| return 0; |
| } |
| |
| /* Prompt to input a command and read the line. */ |
| static grub_err_t |
| grub_rescue_read_line (char **line, int cont) |
| { |
| int c; |
| int pos = 0; |
| |
| grub_printf ((cont) ? "> " : "grub rescue> "); |
| grub_memset (linebuf, 0, GRUB_RESCUE_BUF_SIZE); |
| |
| while ((c = GRUB_TERM_ASCII_CHAR (grub_getkey ())) != '\n' && c != '\r') |
| { |
| if (grub_isprint (c)) |
| { |
| if (pos < GRUB_RESCUE_BUF_SIZE - 1) |
| { |
| linebuf[pos++] = c; |
| grub_putchar (c); |
| } |
| } |
| else if (c == '\b') |
| { |
| if (pos > 0) |
| { |
| linebuf[--pos] = 0; |
| grub_putchar (c); |
| grub_putchar (' '); |
| grub_putchar (c); |
| } |
| } |
| grub_refresh (); |
| } |
| |
| grub_putchar ('\n'); |
| grub_refresh (); |
| |
| *line = grub_strdup (linebuf); |
| |
| return 0; |
| } |
| |
| static struct grub_reader grub_rescue_reader = |
| { |
| .name = "rescue", |
| .init = grub_rescue_init, |
| .read_line = grub_rescue_read_line |
| }; |
| |
| void |
| grub_register_rescue_reader (void) |
| { |
| grub_reader_register ("rescue", &grub_rescue_reader); |
| } |