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/* SPDX-License-Identifier: Apache-2.0 */
/* Copyright 2026 Thorsten Töpper
*
* vim:ts=4:sw=4:expandtab
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <stdbool.h>
#include <ctype.h>
#include "options.h"
#include "trace_macros.h"
/* === GLOBAL VARIABLES === */
struct option long_options[] = {
{ "help", no_argument, 0, 0 },
{ "quiet", no_argument, 0, 0 },
{ "show-hidden-entries", no_argument, 0, 0 },
{ 0, 0, 0, 0 }
};
bool option_quiet = false;
bool option_show_hidden_entries = false;
char *exec_name;
/* === IMPLEMENTATION === */
void usage(char *executable) {
fprintf(stderr, "Call: %s OPTIONS path_to_open\n", executable);
fprintf(stderr, "\nOPTIONS are\n");
/* long name, short name, optional argument, explanation */
fprintf(stderr, " %-25s %2s %10s - %s\n", "--help", "-h", "",
"Show this message and exit");
fprintf(stderr, " %-25s %2s %10s - %s\n", "--quiet", "-q", "",
"Don't print error messages or warnings");
fprintf(stderr, " %-25s %2s %10s - %s\n", "--show-hidden-entries", "-a", "",
"Show hidden entries in the directory");
}
void set_option(const char *option_name, char *option_argument) {
DBGTRC("DEBUG: called with option_name '%s' and option_argument '%s'\n",
option_name, option_argument);
if (option_name == NULL)
return;
/* options WITHOUT arguments */
if (strcmp("help", option_name) == 0) {
usage(exec_name);
exit(EXIT_SUCCESS);
}
if (strcmp("quiet", option_name) == 0) {
option_quiet = true;
return;
}
if (strcmp("show-hidden-entries", option_name) == 0) {
option_show_hidden_entries = true;
return;
}
/* options WITH arguments */
if (option_argument == NULL || option_argument[0] == '\0') {
LOGERR("ERROR: option_name %s with missing option_argument\n",
option_name);
exit(EXIT_FAILURE);
}
LOGERR("ERROR: Option '%s' not recognized\n.", option_name);
}
int parse_arguments(int argc, char **argv) {
int c = 0, index;
/* exec_name is a file internal global variable for --help in set_option() */
exec_name = argv[0];
while(1) {
index = 0;
c = getopt_long(argc, argv, "hqs", long_options, &index);
if (c == -1) {
break;
}
switch (c) {
case 0:
set_option(long_options[index].name, optarg);
break;
case 'h':
usage(exec_name);
exit(EXIT_SUCCESS);
case 'q':
option_quiet = true;
break;
case 's':
option_show_hidden_entries = true;
break;
case '?':
break;
default:
LOGERR("ERROR: unrecognized option 0x%02X '%c'\n", c, c);
usage(exec_name);
exit(EXIT_FAILURE);
}
}
return optind;
}
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