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/*****************************************************************************\
* opts.c
* $Id$
*****************************************************************************
* Copyright (C) 2002-2005 The Regents of the University of California.
* Produced at the Lawrence Livermore National Laboratory.
* Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
* UCRL-CODE-2003-012
* All rights reserved.
*
* This file is part of lxbios, a utility for reading/writing coreboot
* parameters and displaying information from the coreboot table.
* For details, see http://coreboot.org/Lxbios.
*
* Please also read the file DISCLAIMER which is included in this software
* distribution.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License (as published by the
* Free Software Foundation) version 2, dated June 1991.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
* conditions of the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
\*****************************************************************************/
#include "common.h"
#include "opts.h"
lxbios_op_info_t lxbios_op;
lxbios_op_modifier_info_t lxbios_op_modifiers[LXBIOS_NUM_OP_MODIFIERS];
static char * handle_optional_arg (int argc, char *argv[]);
static void register_op (int *op_found, lxbios_op_t op, char op_param[]);
static void register_op_modifier (lxbios_op_modifier_t mod, char mod_param[]);
static void resolve_op_modifiers (void);
static void sanity_check_args (void);
static const char getopt_string[] = "-ab:B:c::de:hil::np:r:tvw:xX:y:Y";
/****************************************************************************
* parse_lxbios_args
*
* Parse command line arguments.
****************************************************************************/
void parse_lxbios_args (int argc, char *argv[])
{ lxbios_op_modifier_info_t *mod_info;
int i, op_found;
char c;
for (i = 0, mod_info = lxbios_op_modifiers;
i < LXBIOS_NUM_OP_MODIFIERS;
i++, mod_info++)
{ mod_info->found = FALSE;
mod_info->found_seq = 0;
mod_info->param = NULL;
}
op_found = FALSE;
opterr = 0;
do
{ switch (c = getopt(argc, argv, getopt_string))
{ case 'a':
register_op(&op_found, LXBIOS_OP_CMOS_SHOW_ALL_PARAMS, NULL);
break;
case 'b':
register_op(&op_found, LXBIOS_OP_WRITE_CMOS_DUMP, optarg);
break;
case 'B':
register_op(&op_found, LXBIOS_OP_READ_CMOS_DUMP, optarg);
break;
case 'c':
register_op(&op_found, LXBIOS_OP_CMOS_CHECKSUM,
handle_optional_arg(argc, argv));
break;
case 'd':
register_op(&op_found, LXBIOS_OP_LBTABLE_DUMP, NULL);
break;
case 'e':
register_op(&op_found, LXBIOS_OP_SHOW_PARAM_VALUES, optarg);
break;
case 'h':
register_op(&op_found, LXBIOS_OP_SHOW_USAGE, NULL);
break;
case 'i':
register_op(&op_found, LXBIOS_OP_CMOS_SET_PARAMS_STDIN, NULL);
break;
case 'l':
register_op(&op_found, LXBIOS_OP_LBTABLE_SHOW_INFO,
handle_optional_arg(argc, argv));
break;
case 'n':
register_op_modifier(LXBIOS_MOD_SHOW_VALUE_ONLY, NULL);
break;
case 'p':
register_op(&op_found, LXBIOS_OP_CMOS_SET_PARAMS_FILE, optarg);
break;
case 'r':
register_op(&op_found, LXBIOS_OP_CMOS_SHOW_ONE_PARAM, optarg);
break;
case 't':
register_op_modifier(LXBIOS_MOD_USE_CMOS_OPT_TABLE, NULL);
break;
case 'v':
register_op(&op_found, LXBIOS_OP_SHOW_VERSION, NULL);
break;
case 'w':
register_op(&op_found, LXBIOS_OP_CMOS_SET_ONE_PARAM, optarg);
break;
case 'x':
register_op(&op_found, LXBIOS_OP_SHOW_CMOS_HEX_DUMP, NULL);
break;
case 'X':
register_op(&op_found, LXBIOS_OP_SHOW_CMOS_DUMPFILE, optarg);
break;
case 'y':
register_op_modifier(LXBIOS_MOD_USE_CMOS_LAYOUT_FILE, optarg);
break;
case 'Y':
register_op(&op_found, LXBIOS_OP_SHOW_LAYOUT, NULL);
break;
case -1: /* no more command line args */
break;
case '?': /* unknown option found */
case 1: /* nonoption command line arg found */
default:
usage(stderr);
break;
}
}
while (c != -1);
if (!op_found)
usage(stderr);
resolve_op_modifiers();
sanity_check_args();
}
/****************************************************************************
* handle_optional_arg
*
* Handle a command line option with an optional argument.
****************************************************************************/
static char * handle_optional_arg (int argc, char *argv[])
{ char *arg;
if (optarg != NULL)
{ /* optional arg is present and arg was specified as "-zarg" (with no
* whitespace between "z" and "arg"), where -z is the option and "arg"
* is the value of the optional arg
*/
return optarg;
}
if ((argv[optind] == NULL) || (argv[optind][0] == '-'))
return NULL;
arg = argv[optind]; /* optional arg is present */
/* This call to getopt yields the optional arg we just found, which we want
* to skip.
*/
getopt(argc, argv, getopt_string);
return arg;
}
/****************************************************************************
* register_op
*
* Store the user's selection of which operation this program should perform.
****************************************************************************/
static void register_op (int *op_found, lxbios_op_t op, char op_param[])
{ if (*op_found && (op != lxbios_op.op))
usage(stderr);
*op_found = TRUE;
lxbios_op.op = op;
lxbios_op.param = op_param;
}
/****************************************************************************
* register_op_modifier
*
* Store information regarding an optional argument specified in addition to
* the user's selection of which operation this program should perform.
****************************************************************************/
static void register_op_modifier (lxbios_op_modifier_t mod, char mod_param[])
{ static int found_seq = 0;
lxbios_op_modifier_info_t *mod_info;
mod_info = &lxbios_op_modifiers[mod];
mod_info->found = TRUE;
mod_info->found_seq = ++found_seq;
mod_info->param = mod_param;
}
/****************************************************************************
* resolve_op_modifiers
*
* If the user specifies multiple arguments that conflict with each other,
* the last specified argument overrides previous conflicting arguments.
****************************************************************************/
static void resolve_op_modifiers (void)
{ if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found &&
lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found)
{ if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found_seq >
lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found_seq)
lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found = FALSE;
else
lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found = FALSE;
}
}
/****************************************************************************
* sanity_check_args
*
* Perform sanity checking on command line arguments.
****************************************************************************/
static void sanity_check_args (void)
{ if ((lxbios_op_modifiers[LXBIOS_MOD_SHOW_VALUE_ONLY].found) &&
(lxbios_op.op != LXBIOS_OP_CMOS_SHOW_ONE_PARAM))
usage(stderr);
}
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