source: grub-pc/trunk/fuentes/.pc/maybe_quiet.patch/grub-core/kern/rescue_reader.c @ 22

Last change on this file since 22 was 22, checked in by mabarracus, 4 years ago

updated version and apply net.ifnames=0 into debian/rules

File size: 2.2 KB
Line 
1/* rescue_reader.c - rescue mode reader  */
2/*
3 *  GRUB  --  GRand Unified Bootloader
4 *  Copyright (C) 2009,2010  Free Software Foundation, Inc.
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>
22#include <grub/parser.h>
23#include <grub/misc.h>
24#include <grub/term.h>
25#include <grub/mm.h>
26
27#define GRUB_RESCUE_BUF_SIZE    256
28
29static char linebuf[GRUB_RESCUE_BUF_SIZE];
30
31/* Prompt to input a command and read the line.  */
32static grub_err_t
33grub_rescue_read_line (char **line, int cont,
34                       void *data __attribute__ ((unused)))
35{
36  int c;
37  int pos = 0;
38  char str[4];
39
40  grub_printf ((cont) ? "> " : "grub rescue> ");
41  grub_memset (linebuf, 0, GRUB_RESCUE_BUF_SIZE);
42
43  while ((c = grub_getkey ()) != '\n' && c != '\r')
44    {
45      if (grub_isprint (c))
46        {
47          if (pos < GRUB_RESCUE_BUF_SIZE - 1)
48            {
49              str[0] = c;
50              str[1] = 0;
51              linebuf[pos++] = c;
52              grub_xputs (str);
53            }
54        }
55      else if (c == '\b')
56        {
57          if (pos > 0)
58            {
59              str[0] = c;
60              str[1] = ' ';
61              str[2] = c;
62              str[3] = 0;
63              linebuf[--pos] = 0;
64              grub_xputs (str);
65            }
66        }
67      grub_refresh ();
68    }
69
70  grub_xputs ("\n");
71  grub_refresh ();
72
73  *line = grub_strdup (linebuf);
74
75  return 0;
76}
77
78void __attribute__ ((noreturn))
79grub_rescue_run (void)
80{
81  grub_printf ("Entering rescue mode...\n");
82
83  while (1)
84    {
85      char *line;
86
87      /* Print an error, if any.  */
88      grub_print_error ();
89      grub_errno = GRUB_ERR_NONE;
90
91      grub_rescue_read_line (&line, 0, NULL);
92      if (! line || line[0] == '\0')
93        continue;
94
95      grub_rescue_parse_line (line, grub_rescue_read_line, NULL);
96      grub_free (line);
97    }
98}
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