diff options
Diffstat (limited to 'arch/sandbox/cpu/os.c')
| -rw-r--r-- | arch/sandbox/cpu/os.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/arch/sandbox/cpu/os.c b/arch/sandbox/cpu/os.c index cb469e051..36637af6c 100644 --- a/arch/sandbox/cpu/os.c +++ b/arch/sandbox/cpu/os.c @@ -21,6 +21,7 @@ #include <errno.h> #include <fcntl.h> +#include <getopt.h> #include <stdlib.h> #include <termios.h> #include <time.h> @@ -31,6 +32,9 @@ #include <sys/types.h> #include <linux/types.h> +#include <asm/getopt.h> +#include <asm/sections.h> +#include <asm/state.h> #include <os.h> /* Operating System Interface */ @@ -155,3 +159,97 @@ u64 os_get_nsec(void) return tv.tv_sec * 1000000000ULL + tv.tv_usec * 1000; #endif } + +static char *short_opts; +static struct option *long_opts; + +int os_parse_args(struct sandbox_state *state, int argc, char *argv[]) +{ + struct sb_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; +} |