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/* command_line_arguments.c
*
* Tox DHT bootstrap daemon.
* Command line argument handling.
*
* Copyright (C) 2015-2016 Tox project All Rights Reserved.
*
* This file is part of Tox.
*
* Tox 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.
*
* Tox 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 Tox. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "command_line_arguments.h"
#include "global.h"
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
/**
* Prints --help message
*/
void print_help()
{
// 2 space ident
// make sure all lines fit into 80 columns
// make sure options are listed in alphabetical order
write_log(LOG_LEVEL_INFO,
"Usage: tox-bootstrapd [OPTION]... --config=FILE_PATH\n"
"\n"
"Options:\n"
" --config=FILE_PATH Specify path to the config file.\n"
" This is a required option.\n"
" Set FILE_PATH to a path to an empty file in order to\n"
" use default settings.\n"
" --foreground Run the daemon in foreground. The daemon won't fork\n"
" (detach from the terminal) and won't use the PID file.\n"
" --help Print this help message.\n"
" --log-backend=BACKEND Specify which logging backend to use.\n"
" Valid BACKEND values (case sensetive):\n"
" syslog Writes log messages to syslog.\n"
" Default option when no --log-backend is\n"
" specified.\n"
" stdout Writes log messages to stdout/stderr.\n"
" --version Print version information.\n");
}
void handle_command_line_arguments(int argc, char *argv[], char **cfg_file_path, LOG_BACKEND *log_backend,
bool *run_in_foreground)
{
if (argc < 2) {
write_log(LOG_LEVEL_ERROR, "Error: No arguments provided.\n\n");
print_help();
exit(1);
}
opterr = 0;
static struct option long_options[] = {
{"config", required_argument, 0, 'c'}, // required option
{"foreground", no_argument, 0, 'f'},
{"help", no_argument, 0, 'h'},
{"log-backend", required_argument, 0, 'l'}, // optional, defaults to syslog
{"version", no_argument, 0, 'v'},
{0, 0, 0, 0 }
};
bool cfg_file_path_set = false;
bool log_backend_set = false;
*run_in_foreground = false;
int opt;
while ((opt = getopt_long(argc, argv, ":", long_options, NULL)) != -1) {
switch (opt) {
case 'c':
*cfg_file_path = optarg;
cfg_file_path_set = true;
break;
case 'f':
*run_in_foreground = true;
break;
case 'h':
print_help();
exit(0);
case 'l':
if (strcmp(optarg, "syslog") == 0) {
*log_backend = LOG_BACKEND_SYSLOG;
log_backend_set = true;
} else if (strcmp(optarg, "stdout") == 0) {
*log_backend = LOG_BACKEND_STDOUT;
log_backend_set = true;
} else {
write_log(LOG_LEVEL_ERROR, "Error: Invalid BACKEND value for --log-backend option passed: %s\n\n", optarg);
print_help();
exit(1);
}
break;
case 'v':
write_log(LOG_LEVEL_INFO, "Version: %lu\n", DAEMON_VERSION_NUMBER);
exit(0);
case '?':
write_log(LOG_LEVEL_ERROR, "Error: Unrecognized option %s\n\n", argv[optind - 1]);
print_help();
exit(1);
case ':':
write_log(LOG_LEVEL_ERROR, "Error: No argument provided for option %s\n\n", argv[optind - 1]);
print_help();
exit(1);
}
}
if (!log_backend_set) {
*log_backend = LOG_BACKEND_SYSLOG;
}
if (!cfg_file_path_set) {
write_log(LOG_LEVEL_ERROR, "Error: The required --config option wasn't specified\n\n");
print_help();
exit(1);
}
}
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