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Commit | Line | Data |
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d558e6b5 | 1 | /* rescue_reader.c - rescue mode reader */ |
2 | /* | |
3 | * GRUB -- GRand Unified Bootloader | |
88d17012 | 4 | * Copyright (C) 2009,2010 Free Software Foundation, Inc. |
d558e6b5 | 5 | * |
6 | * GRUB is free software: you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation, either version 3 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * GRUB is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with GRUB. If not, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #include <grub/types.h> | |
21 | #include <grub/reader.h> | |
f4c623e1 | 22 | #include <grub/parser.h> |
d558e6b5 | 23 | #include <grub/misc.h> |
24 | #include <grub/term.h> | |
f4c623e1 | 25 | #include <grub/mm.h> |
d558e6b5 | 26 | |
27 | #define GRUB_RESCUE_BUF_SIZE 256 | |
28 | ||
29 | static char linebuf[GRUB_RESCUE_BUF_SIZE]; | |
30 | ||
d558e6b5 | 31 | /* Prompt to input a command and read the line. */ |
32 | static grub_err_t | |
33 | grub_rescue_read_line (char **line, int cont) | |
34 | { | |
35 | int c; | |
36 | int pos = 0; | |
37 | ||
38 | grub_printf ((cont) ? "> " : "grub rescue> "); | |
39 | grub_memset (linebuf, 0, GRUB_RESCUE_BUF_SIZE); | |
40 | ||
41 | while ((c = GRUB_TERM_ASCII_CHAR (grub_getkey ())) != '\n' && c != '\r') | |
42 | { | |
43 | if (grub_isprint (c)) | |
44 | { | |
45 | if (pos < GRUB_RESCUE_BUF_SIZE - 1) | |
46 | { | |
47 | linebuf[pos++] = c; | |
48 | grub_putchar (c); | |
49 | } | |
50 | } | |
51 | else if (c == '\b') | |
52 | { | |
53 | if (pos > 0) | |
54 | { | |
55 | linebuf[--pos] = 0; | |
56 | grub_putchar (c); | |
57 | grub_putchar (' '); | |
58 | grub_putchar (c); | |
59 | } | |
60 | } | |
61 | grub_refresh (); | |
62 | } | |
63 | ||
64 | grub_putchar ('\n'); | |
65 | grub_refresh (); | |
66 | ||
67 | *line = grub_strdup (linebuf); | |
68 | ||
69 | return 0; | |
70 | } | |
71 | ||
d558e6b5 | 72 | void |
f4c623e1 | 73 | grub_rescue_run (void) |
d558e6b5 | 74 | { |
f4c623e1 VS |
75 | grub_printf ("Entering rescue mode...\n"); |
76 | ||
77 | while (1) | |
78 | { | |
79 | char *line; | |
80 | ||
81 | /* Print an error, if any. */ | |
82 | grub_print_error (); | |
83 | grub_errno = GRUB_ERR_NONE; | |
84 | ||
85 | grub_rescue_read_line (&line, 0); | |
88d17012 | 86 | if (! line || line[0] == '\0') |
f4c623e1 VS |
87 | continue; |
88 | ||
89 | grub_parser_get_current ()->parse_line (line, grub_rescue_read_line); | |
90 | grub_free (line); | |
91 | } | |
d558e6b5 | 92 | } |