82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
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/* read.c - Command to read variables from user. */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008 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/dl.h>
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#include <grub/misc.h>
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#include <grub/mm.h>
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#include <grub/normal.h>
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#include <grub/term.h>
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#include <grub/types.h>
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static char *
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grub_getline (void)
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{
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int i;
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char *line;
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char *tmp;
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i = 0;
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line = grub_malloc (1 + i + sizeof('\0'));
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if (! line)
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return NULL;
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while ((line[i - 1] != '\n') && (line[i - 1] != '\r'))
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{
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line[i] = grub_getkey ();
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if (grub_isprint (line[i]))
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grub_putchar (line[i]);
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i++;
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tmp = grub_realloc (line, 1 + i + sizeof('\0'));
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if (! tmp)
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{
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grub_free (line);
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return NULL;
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}
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line = tmp;
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}
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line[i] = '\0';
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return line;
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}
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static grub_err_t
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grub_cmd_read (struct grub_arg_list *state UNUSED, int argc, char **args)
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{
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char *line = grub_getline ();
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if (! line)
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return grub_errno;
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if (argc > 0)
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grub_env_set (args[0], line);
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grub_free (line);
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return 0;
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}
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GRUB_MOD_INIT(read)
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{
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grub_register_command ("read", grub_cmd_read, GRUB_COMMAND_FLAG_CMDLINE,
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"read [ENVVAR]", "Set variable with user input", 0);
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}
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GRUB_MOD_FINI(read)
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{
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grub_unregister_command ("read");
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}
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