115 lines
2.7 KiB
C
115 lines
2.7 KiB
C
/* read.c - Command to read variables from user. */
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/*
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* VAS_EBOOT -- GRand Unified Bootloader
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* Copyright (C) 2006,2007,2008 Free Software Foundation, Inc.
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*
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* VAS_EBOOT 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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* VAS_EBOOT 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 VAS_EBOOT. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <VasEBoot/dl.h>
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#include <VasEBoot/misc.h>
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#include <VasEBoot/mm.h>
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#include <VasEBoot/env.h>
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#include <VasEBoot/term.h>
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#include <VasEBoot/types.h>
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#include <VasEBoot/extcmd.h>
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#include <VasEBoot/i18n.h>
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#include <VasEBoot/safemath.h>
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VAS_EBOOT_MOD_LICENSE ("GPLv3+");
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static const struct VasEBoot_arg_option options[] =
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{
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{"silent", 's', 0, N_("Do not echo input"), 0, 0},
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{0, 0, 0, 0, 0, 0}
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};
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static char *
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VasEBoot_getline (int silent)
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{
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VasEBoot_size_t i;
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char *line;
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char *tmp;
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int c;
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VasEBoot_size_t alloc_size;
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i = 0;
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line = VasEBoot_malloc (1 + sizeof('\0'));
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if (! line)
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return NULL;
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while (1)
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{
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c = VasEBoot_getkey ();
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if ((c == '\n') || (c == '\r'))
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break;
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if (!VasEBoot_isprint (c))
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continue;
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line[i] = (char) c;
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if (!silent)
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VasEBoot_printf ("%c", c);
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if (VasEBoot_add (i, 1, &i))
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{
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VasEBoot_error (VAS_EBOOT_ERR_OUT_OF_RANGE, N_("overflow is detected"));
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return NULL;
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}
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if (VasEBoot_add (i, 1 + sizeof('\0'), &alloc_size))
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{
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VasEBoot_error (VAS_EBOOT_ERR_OUT_OF_RANGE, N_("overflow is detected"));
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return NULL;
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}
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tmp = VasEBoot_realloc (line, alloc_size);
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if (! tmp)
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{
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VasEBoot_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 VasEBoot_err_t
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VasEBoot_cmd_read (VasEBoot_extcmd_context_t ctxt, int argc, char **args)
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{
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struct VasEBoot_arg_list *state = ctxt->state;
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char *line = VasEBoot_getline (state[0].set);
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if (! line)
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return VasEBoot_errno;
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if (argc > 0)
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VasEBoot_env_set (args[0], line);
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VasEBoot_free (line);
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return 0;
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}
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static VasEBoot_extcmd_t cmd;
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VAS_EBOOT_MOD_INIT(read)
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{
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cmd = VasEBoot_register_extcmd ("read", VasEBoot_cmd_read, 0,
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N_("[-s] [ENVVAR]"),
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N_("Set variable with user input."), options);
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}
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VAS_EBOOT_MOD_FINI(read)
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{
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VasEBoot_unregister_extcmd (cmd);
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}
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