111 lines
3.1 KiB
C
111 lines
3.1 KiB
C
/**
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* Copyright 2021 Johannes Marbach
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* SPDX-License-Identifier: GPL-3.0-or-later
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*/
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#include "command_line.h"
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#include "buffyboard.h"
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#include <getopt.h>
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#include <stdio.h>
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#include <stdlib.h>
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/**
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* Static prototypes
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*/
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/**
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* Initialise a command line options struct with default values and exit on failure.
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*
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* @param opts pointer to the options struct
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*/
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static void init_opts(bb_cli_opts *opts);
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/**
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* Output usage instructions.
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*/
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static void print_usage();
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/**
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* Static functions
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*/
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static void init_opts(bb_cli_opts *opts) {
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opts->rotation = LV_DISP_ROT_NONE;
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}
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static void print_usage() {
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fprintf(stderr,
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/*-------------------------------- 78 CHARS --------------------------------*/
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"Usage: buffyboard [OPTION]\n"
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"\n"
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"Mandatory arguments to long options are mandatory for short options too.\n"
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" -r, --rotate=[0-3] Rotate the UI to the given orientation.\n"
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" 0 - normal orientation (0 degree)\n"
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" 1 - clockwise orientation (90 degrees)\n"
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" 2 - upside down orientation (180 degrees)\n"
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" 3 - counterclockwise orientation (270 degrees)\n"
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" The values match the ones provided by the kernel in\n"
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" /sys/class/graphics/fbcon/rotate.\n"
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" -h, --help Print this message and exit\n"
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" -V, --version Print the buffyboard version and exit\n");
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/*-------------------------------- 78 CHARS --------------------------------*/
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}
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/**
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* Public functions
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*/
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void bb_cli_parse_opts(int argc, char *argv[], bb_cli_opts *opts) {
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init_opts(opts);
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struct option long_opts[] = {
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{ "rotate", required_argument, NULL, 'r' },
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{ "help", no_argument, NULL, 'h' },
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{ "version", no_argument, NULL, 'V' },
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{ NULL, 0, NULL, 0 }
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};
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int opt, index = 0;
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while ((opt = getopt_long(argc, argv, "r:hV", long_opts, &index)) != -1) {
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switch (opt) {
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case 'r': {
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int orientation;
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if (sscanf(optarg, "%i", &orientation) != 1 || orientation < 0 || orientation > 3) {
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fprintf(stderr, "Invalid orientation argument \"%s\"\n", optarg);
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exit(EXIT_FAILURE);
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}
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switch (orientation) {
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case 0:
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opts->rotation = LV_DISP_ROT_NONE;
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break;
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case 1:
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opts->rotation = LV_DISP_ROT_270;
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break;
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case 2:
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opts->rotation = LV_DISP_ROT_180;
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break;
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case 3:
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opts->rotation = LV_DISP_ROT_90;
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break;
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}
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break;
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}
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case 'h':
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print_usage();
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exit(EXIT_SUCCESS);
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case 'V':
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fprintf(stderr, "buffyboard %s\n", BB_VERSION);
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exit(0);
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default:
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print_usage();
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exit(EXIT_FAILURE);
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}
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}
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}
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