int sandbox_early_getopt_check(void)
{
struct sandbox_state *state = state_get_current();
struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
size_t num_options = __u_boot_sandbox_option_count();
size_t i;
int max_arg_len, max_noarg_len;
/* parse_err will be a string of the faulting option */
if (!state->parse_err)
return 0;
if (strcmp(state->parse_err, "help")) {
printf("u-boot: error: failed while parsing option: %s\n"
"\ttry running with --help for more information.\n",
state->parse_err);
os_exit(1);
}
printf(
"u-boot, a command line test interface to U-Boot\n\n"
"Usage: u-boot [options]\n"
"Options:\n");
max_arg_len = 0;
for (i = 0; i < num_options; ++i)
max_arg_len = max((int)strlen(sb_opt[i]->flag), max_arg_len);
max_noarg_len = max_arg_len + 7;
for (i = 0; i < num_options; ++i) {
struct sandbox_cmdline_option *opt = sb_opt[i];
/* first output the short flag if it has one */
if (opt->flag_short >= 0x100)
printf(" ");
else
printf(" -%c, ", opt->flag_short);
/* then the long flag */
if (opt->has_arg)
printf("--%-*s <arg> ", max_arg_len, opt->flag);
else
printf("--%-*s", max_noarg_len, opt->flag);
/* finally the help text */
printf(" %s\n", opt->help);
}
os_exit(0);
}
int os_parse_args(struct sandbox_state *state, int argc, char *argv[])
{
struct sandbox_cmdline_option **sb_opt = __u_boot_sandbox_option_start;
size_t num_options = __u_boot_sandbox_option_count();
size_t i;
int hidden_short_opt;
size_t si;
int c;
if (short_opts || long_opts)
return 1;
state->argc = argc;
state->argv = argv;
/* dynamically construct the arguments to the system getopt_long */
short_opts = os_malloc(sizeof(*short_opts) * num_options * 2 + 1);
long_opts = os_malloc(sizeof(*long_opts) * num_options);
if (!short_opts || !long_opts)
return 1;
/*
* getopt_long requires "val" to be unique (since that is what the
* func returns), so generate unique values automatically for flags
* that don't have a short option. pick 0x100 as that is above the
* single byte range (where ASCII/ISO-XXXX-X charsets live).
*/
hidden_short_opt = 0x100;
si = 0;
for (i = 0; i < num_options; ++i) {
long_opts[i].name = sb_opt[i]->flag;
long_opts[i].has_arg = sb_opt[i]->has_arg ?
required_argument : no_argument;
long_opts[i].flag = NULL;
if (sb_opt[i]->flag_short) {
short_opts[si++] = long_opts[i].val = sb_opt[i]->flag_short;
if (long_opts[i].has_arg == required_argument)
short_opts[si++] = ':';
} else
long_opts[i].val = sb_opt[i]->flag_short = hidden_short_opt++;
}
short_opts[si] = '\0';
/* we need to handle output ourselves since u-boot provides printf */
opterr = 0;
/*
* walk all of the options the user gave us on the command line,
* figure out what u-boot option structure they belong to (via
* the unique short val key), and call the appropriate callback.
*/
while ((c = getopt_long(argc, argv, short_opts, long_opts, NULL)) != -1) {
for (i = 0; i < num_options; ++i) {
if (sb_opt[i]->flag_short == c) {
if (sb_opt[i]->callback(state, optarg)) {
state->parse_err = sb_opt[i]->flag;
return 0;
}
break;
}
}
if (i == num_options) {
/*
* store the faulting flag for later display. we have to
* store the flag itself as the getopt parsing itself is
* tricky: need to handle the following flags (assume all
* of the below are unknown):
* -a optopt='a' optind=<next>
* -abbbb optopt='a' optind=<this>
* -aaaaa optopt='a' optind=<this>
* --a optopt=0 optind=<this>
* as you can see, it is impossible to determine the exact
* faulting flag without doing the parsing ourselves, so
* we just report the specific flag that failed.
*/
if (optopt) {
static char parse_err[3] = { '-', 0, '\0', };
parse_err[1] = optopt;
state->parse_err = parse_err;
} else
state->parse_err = argv[optind - 1];
break;
}
}
return 0;
}
