89 lines
2 KiB
C
89 lines
2 KiB
C
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/* rescue_reader.c - rescue mode reader */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/reader.h>
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#include <grub/misc.h>
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#include <grub/term.h>
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#define GRUB_RESCUE_BUF_SIZE 256
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static char linebuf[GRUB_RESCUE_BUF_SIZE];
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static grub_err_t
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grub_rescue_init (void)
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{
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grub_printf ("Entering rescue mode...\n");
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return 0;
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}
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/* Prompt to input a command and read the line. */
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static grub_err_t
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grub_rescue_read_line (char **line, int cont)
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{
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int c;
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int pos = 0;
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grub_printf ((cont) ? "> " : "grub rescue> ");
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grub_memset (linebuf, 0, GRUB_RESCUE_BUF_SIZE);
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while ((c = GRUB_TERM_ASCII_CHAR (grub_getkey ())) != '\n' && c != '\r')
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{
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if (grub_isprint (c))
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{
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if (pos < GRUB_RESCUE_BUF_SIZE - 1)
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{
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linebuf[pos++] = c;
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grub_putchar (c);
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}
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}
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else if (c == '\b')
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{
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if (pos > 0)
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{
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linebuf[--pos] = 0;
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grub_putchar (c);
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grub_putchar (' ');
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grub_putchar (c);
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}
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}
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grub_refresh ();
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}
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grub_putchar ('\n');
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grub_refresh ();
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*line = grub_strdup (linebuf);
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return 0;
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}
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static struct grub_reader grub_rescue_reader =
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{
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.name = "rescue",
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.init = grub_rescue_init,
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.read_line = grub_rescue_read_line
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};
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void
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grub_register_rescue_reader (void)
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{
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grub_reader_register ("rescue", &grub_rescue_reader);
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}
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