| // SPDX-License-Identifier: LGPL-2.1-or-later |
| /* |
| * This file is part of libgpiod. |
| * |
| * Copyright (C) 2017-2018 Bartosz Golaszewski <bartekgola@gmail.com> |
| */ |
| |
| #include <getopt.h> |
| #include <gpiod.h> |
| #include <stdio.h> |
| #include <string.h> |
| |
| #include "tools-common.h" |
| |
| static const struct option longopts[] = { |
| { "help", no_argument, NULL, 'h' }, |
| { "version", no_argument, NULL, 'v' }, |
| { GETOPT_NULL_LONGOPT }, |
| }; |
| |
| static const char *const shortopts = "+hv"; |
| |
| static void print_help(void) |
| { |
| printf("Usage: %s [OPTIONS]\n", get_progname()); |
| printf("\n"); |
| printf("List all GPIO chips, print their labels and number of GPIO lines.\n"); |
| printf("\n"); |
| printf("Options:\n"); |
| printf(" -h, --help:\t\tdisplay this message and exit\n"); |
| printf(" -v, --version:\tdisplay the version and exit\n"); |
| } |
| |
| int main(int argc, char **argv) |
| { |
| struct gpiod_chip_iter *iter; |
| struct gpiod_chip *chip; |
| int optc, opti; |
| |
| for (;;) { |
| optc = getopt_long(argc, argv, shortopts, longopts, &opti); |
| if (optc < 0) |
| break; |
| |
| switch (optc) { |
| case 'h': |
| print_help(); |
| return EXIT_SUCCESS; |
| case 'v': |
| print_version(); |
| return EXIT_SUCCESS; |
| case '?': |
| die("try %s --help", get_progname()); |
| default: |
| abort(); |
| } |
| } |
| |
| argc -= optind; |
| argv += optind; |
| |
| if (argc > 0) |
| die("unrecognized argument: %s", argv[0]); |
| |
| iter = gpiod_chip_iter_new(); |
| if (!iter) |
| die_perror("unable to access GPIO chips"); |
| |
| gpiod_foreach_chip(iter, chip) { |
| printf("%s [%s] (%u lines)\n", |
| gpiod_chip_name(chip), |
| gpiod_chip_label(chip), |
| gpiod_chip_num_lines(chip)); |
| } |
| |
| gpiod_chip_iter_free(iter); |
| |
| return EXIT_SUCCESS; |
| } |