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/* SPDX-License-Identifier: GPL-2.0-only */
#include "common.h"
#include "opts.h"
nvramtool_op_info_t nvramtool_op;
nvramtool_op_modifier_info_t nvramtool_op_modifiers[NVRAMTOOL_NUM_OP_MODIFIERS];
static char *handle_optional_arg(int argc, char *argv[]);
static void register_op(int *op_found, nvramtool_op_t op, char op_param[]);
static void register_op_modifier(nvramtool_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::C:dD:e:hH:iL:l::np:r:tvw:xX:y:Y";
/****************************************************************************
* parse_nvramtool_args
*
* Parse command line arguments.
****************************************************************************/
void parse_nvramtool_args(int argc, char *argv[])
{
nvramtool_op_modifier_info_t *mod_info;
int i, op_found, c;
for (i = 0, mod_info = nvramtool_op_modifiers;
i < NVRAMTOOL_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,
NVRAMTOOL_OP_CMOS_SHOW_ALL_PARAMS, NULL);
break;
case 'b':
register_op(&op_found, NVRAMTOOL_OP_WRITE_CMOS_DUMP,
optarg);
break;
case 'B':
register_op(&op_found, NVRAMTOOL_OP_READ_CMOS_DUMP,
optarg);
break;
case 'c':
register_op(&op_found, NVRAMTOOL_OP_CMOS_CHECKSUM,
handle_optional_arg(argc, argv));
break;
case 'C':
register_op_modifier(NVRAMTOOL_MOD_USE_CBFS_FILE,
optarg);
break;
case 'd':
register_op(&op_found, NVRAMTOOL_OP_LBTABLE_DUMP, NULL);
break;
case 'D':
register_op_modifier(NVRAMTOOL_MOD_USE_CMOS_FILE,
optarg);
break;
case 'e':
register_op(&op_found, NVRAMTOOL_OP_SHOW_PARAM_VALUES,
optarg);
break;
case 'h':
register_op(&op_found, NVRAMTOOL_OP_SHOW_USAGE, NULL);
break;
case 'H':
register_op(&op_found, NVRAMTOOL_OP_WRITE_HEADER_FILE, optarg);
break;
case 'i':
register_op(&op_found,
NVRAMTOOL_OP_CMOS_SET_PARAMS_STDIN, NULL);
break;
case 'l':
register_op(&op_found, NVRAMTOOL_OP_LBTABLE_SHOW_INFO,
handle_optional_arg(argc, argv));
break;
case 'L':
register_op(&op_found, NVRAMTOOL_OP_WRITE_BINARY_FILE,
optarg);
break;
case 'n':
register_op_modifier(NVRAMTOOL_MOD_SHOW_VALUE_ONLY,
NULL);
break;
case 'p':
register_op(&op_found,
NVRAMTOOL_OP_CMOS_SET_PARAMS_FILE, optarg);
break;
case 'r':
register_op(&op_found, NVRAMTOOL_OP_CMOS_SHOW_ONE_PARAM,
optarg);
break;
case 't':
register_op_modifier(NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE,
NULL);
break;
case 'v':
register_op(&op_found, NVRAMTOOL_OP_SHOW_VERSION, NULL);
break;
case 'w':
register_op(&op_found, NVRAMTOOL_OP_CMOS_SET_ONE_PARAM,
optarg);
break;
case 'x':
register_op(&op_found, NVRAMTOOL_OP_SHOW_CMOS_HEX_DUMP,
NULL);
break;
case 'X':
register_op(&op_found, NVRAMTOOL_OP_SHOW_CMOS_DUMPFILE,
optarg);
break;
case 'y':
register_op_modifier(NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE,
optarg);
break;
case 'Y':
register_op(&op_found, NVRAMTOOL_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, nvramtool_op_t op, char op_param[])
{
if (*op_found && (op != nvramtool_op.op))
usage(stderr);
*op_found = TRUE;
nvramtool_op.op = op;
nvramtool_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(nvramtool_op_modifier_t mod, char mod_param[])
{
static int found_seq = 0;
nvramtool_op_modifier_info_t *mod_info;
mod_info = &nvramtool_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 (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found &&
nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found) {
if (nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found_seq >
nvramtool_op_modifiers[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found_seq)
nvramtool_op_modifiers
[NVRAMTOOL_MOD_USE_CMOS_OPT_TABLE].found = FALSE;
else
nvramtool_op_modifiers
[NVRAMTOOL_MOD_USE_CMOS_LAYOUT_FILE].found = FALSE;
}
}
/****************************************************************************
* sanity_check_args
*
* Perform sanity checking on command line arguments.
****************************************************************************/
static void sanity_check_args(void)
{
if ((nvramtool_op_modifiers[NVRAMTOOL_MOD_SHOW_VALUE_ONLY].found) &&
(nvramtool_op.op != NVRAMTOOL_OP_CMOS_SHOW_ONE_PARAM))
usage(stderr);
}
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