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/**
* Copyright 2021 Johannes Marbach
*
* This file is part of unl0kr, hereafter referred to as the program.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "command_line.h"
#include "log.h"
#include "unl0kr.h"
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
/**
* Static prototypes
*/
/**
* Initialise a command line options struct with default values and exit on failure.
*
* @param opts pointer to the options struct
*/
static void init_opts(ul_cli_opts *opts);
/**
* Output usage instructions.
*/
static void print_usage();
/**
* Static functions
*/
static void init_opts(ul_cli_opts *opts) {
opts->num_config_files = 0;
opts->config_files = NULL;
opts->hor_res = -1;
opts->ver_res = -1;
opts->x_offset = 0;
opts->y_offset = 0;
opts->verbose = false;
}
static void print_usage() {
fprintf(stderr,
/*-------------------------------- 78 CHARS --------------------------------*/
"Usage: unl0kr [OPTION]\n"
"\n"
"Unl0kr values the CRYPTTAB_TRIED variable. Upon completion, the entered\n"
"password is printed to STDOUT. All other output happens on STDERR.\n"
"\n"
"Mandatory arguments to long options are mandatory for short options too.\n"
" -C, --config-override Path to a config override file. Can be supplied\n"
" multiple times. Config files are merged in the\n"
" following order:\n"
" * /etc/unl0kr.conf\n"
" * /etc/unl0kr.conf.d/* (alphabetically)\n"
" * Override files (in supplied order)\n"
" -g, --geometry=NxM[@X,Y] Force a display size of N horizontal times M\n"
" vertical pixels, offset horizontally by X\n"
" pixels and vertically by Y pixels\n"
" -d --dpi=N Override the display's DPI value\n"
" -h, --help Print this message and exit\n"
" -v, --verbose Enable more detailed logging output on STDERR\n"
" -V, --version Print the unl0kr version and exit\n");
/*-------------------------------- 78 CHARS --------------------------------*/
}
/**
* Public functions
*/
void ul_cli_parse_opts(int argc, char *argv[], ul_cli_opts *opts) {
init_opts(opts);
struct option long_opts[] = {
{ "config-override", required_argument, NULL, 'C' },
{ "geometry", required_argument, NULL, 'g' },
{ "dpi", required_argument, NULL, 'd' },
{ "help", no_argument, NULL, 'h' },
{ "verbose", no_argument, NULL, 'v' },
{ "version", no_argument, NULL, 'V' },
{ NULL, 0, NULL, 0 }
};
int opt, index = 0;
while ((opt = getopt_long(argc, argv, "c:C:g:d:hvV", long_opts, &index)) != -1) {
switch (opt) {
case 'C':
opts->config_files = realloc(opts->config_files, (opts->num_config_files + 1) * sizeof(char *));
if (!opts->config_files) {
ul_log(UL_LOG_LEVEL_ERROR, "Could not allocate memory for config file paths");
exit(EXIT_FAILURE);
}
opts->config_files[opts->num_config_files] = optarg;
opts->num_config_files++;
break;
case 'g':
if (sscanf(optarg, "%ix%i@%i,%i", &(opts->hor_res), &(opts->ver_res), &(opts->x_offset), &(opts->y_offset)) != 4) {
if (sscanf(optarg, "%ix%i", &(opts->hor_res), &(opts->ver_res)) != 2) {
ul_log(UL_LOG_LEVEL_ERROR, "Invalid geometry argument \"%s\"\n", optarg);
exit(EXIT_FAILURE);
}
}
break;
case 'd':
if (sscanf(optarg, "%i", &(opts->dpi)) != 1) {
ul_log(UL_LOG_LEVEL_ERROR, "Invalid dpi argument \"%s\"\n", optarg);
exit(EXIT_FAILURE);
}
break;
case 'h':
print_usage();
exit(EXIT_SUCCESS);
case 'v':
opts->verbose = true;
break;
case 'V':
fprintf(stderr, "unl0kr %s\n", UL_VERSION);
exit(0);
default:
print_usage();
exit(EXIT_FAILURE);
}
}
}
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