233 lines
8.3 KiB
C
233 lines
8.3 KiB
C
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/*****************************************************************************\
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* opts.c
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* $Id: opts.c,v 1.2 2005/12/16 22:45:49 dsp_llnl Exp $
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*****************************************************************************
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* Copyright (C) 2002-2005 The Regents of the University of California.
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* Produced at the Lawrence Livermore National Laboratory.
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* Written by Dave Peterson <dsp@llnl.gov> <dave_peterson@pobox.com>.
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* UCRL-CODE-2003-012
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* All rights reserved.
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*
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* This file is part of lxbios, a utility for reading/writing LinuxBIOS
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* parameters and displaying information from the LinuxBIOS table.
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* For details, see <http://www.llnl.gov/linux/lxbios/>.
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*
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* Please also read the file DISCLAIMER which is included in this software
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* distribution.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License (as published by the
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* Free Software Foundation) version 2, dated June 1991.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the IMPLIED WARRANTY OF
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the terms and
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* conditions of the 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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\*****************************************************************************/
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#include "common.h"
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#include "opts.h"
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lxbios_op_info_t lxbios_op;
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lxbios_op_modifier_info_t lxbios_op_modifiers[LXBIOS_NUM_OP_MODIFIERS];
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static char * handle_optional_arg (int argc, char *argv[]);
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static void register_op (int *op_found, lxbios_op_t op, char op_param[]);
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static void register_op_modifier (lxbios_op_modifier_t mod, char mod_param[]);
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static void resolve_op_modifiers (void);
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static void sanity_check_args (void);
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static const char getopt_string[] = "-ab:B:c::de:hil::np:r:tvw:xX:y:Y";
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/****************************************************************************
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* parse_lxbios_args
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*
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* Parse command line arguments.
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****************************************************************************/
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void parse_lxbios_args (int argc, char *argv[])
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{ lxbios_op_modifier_info_t *mod_info;
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int i, op_found;
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char c;
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for (i = 0, mod_info = lxbios_op_modifiers;
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i < LXBIOS_NUM_OP_MODIFIERS;
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i++, mod_info++)
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{ mod_info->found = FALSE;
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mod_info->found_seq = 0;
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mod_info->param = NULL;
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}
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op_found = FALSE;
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opterr = 0;
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do
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{ switch (c = getopt(argc, argv, getopt_string))
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{ case 'a':
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register_op(&op_found, LXBIOS_OP_CMOS_SHOW_ALL_PARAMS, NULL);
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break;
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case 'b':
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register_op(&op_found, LXBIOS_OP_WRITE_CMOS_DUMP, optarg);
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break;
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case 'B':
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register_op(&op_found, LXBIOS_OP_READ_CMOS_DUMP, optarg);
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break;
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case 'c':
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register_op(&op_found, LXBIOS_OP_CMOS_CHECKSUM,
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handle_optional_arg(argc, argv));
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break;
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case 'd':
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register_op(&op_found, LXBIOS_OP_LBTABLE_DUMP, NULL);
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break;
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case 'e':
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register_op(&op_found, LXBIOS_OP_SHOW_PARAM_VALUES, optarg);
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break;
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case 'h':
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register_op(&op_found, LXBIOS_OP_SHOW_USAGE, NULL);
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break;
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case 'i':
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register_op(&op_found, LXBIOS_OP_CMOS_SET_PARAMS_STDIN, NULL);
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break;
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case 'l':
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register_op(&op_found, LXBIOS_OP_LBTABLE_SHOW_INFO,
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handle_optional_arg(argc, argv));
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break;
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case 'n':
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register_op_modifier(LXBIOS_MOD_SHOW_VALUE_ONLY, NULL);
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break;
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case 'p':
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register_op(&op_found, LXBIOS_OP_CMOS_SET_PARAMS_FILE, optarg);
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break;
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case 'r':
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register_op(&op_found, LXBIOS_OP_CMOS_SHOW_ONE_PARAM, optarg);
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break;
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case 't':
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register_op_modifier(LXBIOS_MOD_USE_CMOS_OPT_TABLE, NULL);
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break;
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case 'v':
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register_op(&op_found, LXBIOS_OP_SHOW_VERSION, NULL);
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break;
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case 'w':
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register_op(&op_found, LXBIOS_OP_CMOS_SET_ONE_PARAM, optarg);
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break;
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case 'x':
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register_op(&op_found, LXBIOS_OP_SHOW_CMOS_HEX_DUMP, NULL);
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break;
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case 'X':
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register_op(&op_found, LXBIOS_OP_SHOW_CMOS_DUMPFILE, optarg);
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break;
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case 'y':
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register_op_modifier(LXBIOS_MOD_USE_CMOS_LAYOUT_FILE, optarg);
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break;
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case 'Y':
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register_op(&op_found, LXBIOS_OP_SHOW_LAYOUT, NULL);
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break;
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case -1: /* no more command line args */
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break;
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case '?': /* unknown option found */
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case 1: /* nonoption command line arg found */
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default:
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usage(stderr);
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break;
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}
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}
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while (c != -1);
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if (!op_found)
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usage(stderr);
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resolve_op_modifiers();
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sanity_check_args();
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}
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/****************************************************************************
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* handle_optional_arg
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*
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* Handle a command line option with an optional argument.
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****************************************************************************/
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static char * handle_optional_arg (int argc, char *argv[])
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{ char *arg;
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if (optarg != NULL)
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{ /* optional arg is present and arg was specified as "-zarg" (with no
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* whitespace between "z" and "arg"), where -z is the option and "arg"
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* is the value of the optional arg
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*/
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return optarg;
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}
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if ((argv[optind] == NULL) || (argv[optind][0] == '-'))
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return NULL;
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arg = argv[optind]; /* optional arg is present */
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/* This call to getopt yields the optional arg we just found, which we want
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* to skip.
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*/
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getopt(argc, argv, getopt_string);
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return arg;
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}
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/****************************************************************************
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* register_op
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*
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* Store the user's selection of which operation this program should perform.
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****************************************************************************/
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static void register_op (int *op_found, lxbios_op_t op, char op_param[])
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{ if (*op_found && (op != lxbios_op.op))
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usage(stderr);
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*op_found = TRUE;
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lxbios_op.op = op;
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lxbios_op.param = op_param;
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}
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/****************************************************************************
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* register_op_modifier
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*
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* Store information regarding an optional argument specified in addition to
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* the user's selection of which operation this program should perform.
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****************************************************************************/
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static void register_op_modifier (lxbios_op_modifier_t mod, char mod_param[])
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{ static int found_seq = 0;
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lxbios_op_modifier_info_t *mod_info;
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mod_info = &lxbios_op_modifiers[mod];
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mod_info->found = TRUE;
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mod_info->found_seq = ++found_seq;
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mod_info->param = mod_param;
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}
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/****************************************************************************
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* resolve_op_modifiers
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*
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* If the user specifies multiple arguments that conflict with each other,
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* the last specified argument overrides previous conflicting arguments.
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****************************************************************************/
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static void resolve_op_modifiers (void)
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{ if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found &&
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lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found)
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{ if (lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found_seq >
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lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found_seq)
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lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_OPT_TABLE].found = FALSE;
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else
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lxbios_op_modifiers[LXBIOS_MOD_USE_CMOS_LAYOUT_FILE].found = FALSE;
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}
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}
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/****************************************************************************
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* sanity_check_args
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*
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* Perform sanity checking on command line arguments.
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****************************************************************************/
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static void sanity_check_args (void)
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{ if ((lxbios_op_modifiers[LXBIOS_MOD_SHOW_VALUE_ONLY].found) &&
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(lxbios_op.op != LXBIOS_OP_CMOS_SHOW_ONE_PARAM))
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usage(stderr);
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}
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