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/*
* Copyright (C) 2009 Red Hat Inc.
*
* This application 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; version 2.
*
* This application 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.
*/
/**
* @file argparser.c
* @author David Sommerseth <davids@redhat.com>
* @date Thu Oct 22 13:58:46 2009
*
* @brief Generic argument parser
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <eurephia_values.h>
#include <eurephia_nullsafe.h>
/**
* Print a help screen to stdout
*/
void usage() {
printf("rteval-parserd: Parses new reports recieved via XML-RPC\n"
"\n"
"This program will wait for changes to the rteval 'submissionqueue' table.\n"
"When a new report is registered here, it will send this report to one of\n"
"the worker threads which will insert the parsed result into the database.\n"
"\n"
"** Program arguments:\n"
" -d | --daemon Run as a daemon\n"
" -l | --log <log dest> Where to put log data\n"
" -L | --log-level <verbosity> What to log\n"
" -f | --config <config file> Which configuration file to use\n"
" -t | --threads <num. threads> How many worker threads to start (def: 4)\n"
" -h | --help This help screen\n"
"\n"
"** Configuration file\n"
"By default the program will look for /etc/rteval.conf. This can be\n"
"overriden by using --config <config file>.\n"
"\n"
"** Logging\n"
"When the program is started as a daemon, it will log to syslog by default.\n"
"The default log level is 'info'. When not started as a daemon, all logging\n"
"will go to stderr by default.\n"
"\n"
"The --log argument takes either 'destination' or a file name. Unknown\n"
"destinations are treated as filenames. Valid 'destinations' are:\n"
"\n"
" stderr: - Log to stderr\n"
" stdout: - Log to stdout\n"
" syslog:[facility] - Log to syslog\n"
" <file name> - Log to given file\n"
"\n"
"For syslog the default facility is 'daemon', but can be overriden by using\n"
"one of the following facility values:\n"
" daemon, user and local0 to local7\n"
"\n"
"Log verbosity is set by the --log-level. The valid values here are:\n"
"\n"
" emerg, emergency - Only log errors which causes the program to stop\n"
" alert - Incidents which needs immediate attention\n"
" crit, critical - Unexpected incidents which is not urgent\n"
" err, error - Parsing errors. Issues with input data\n"
" warn, warning - Incidents which may influence performance\n"
" notice - Less important warnings\n"
" info - General run information\n"
" debug - Detailed run information, incl. thread operations\n"
"\n"
);
}
/**
* Parses program arguments and puts the recognised arguments into an eurephiaVALUES struct.
*
* @param argc argument counter
* @param argv argument string table
*
* @return Returns a pointer to an eurephiaVALUES struct. On failure, the program halts.
*/
eurephiaVALUES *parse_arguments(int argc, char **argv) {
eurephiaVALUES *args = NULL;
int optidx, c;
static struct option long_opts[] = {
{"log", 1, 0, 'l'},
{"log-level", 1, 0, 'L'},
{"config", 1, 0, 'f'},
{"threads", 1, 0, 't'},
{"daemon", 0, 0, 'd'},
{"help", 0, 0, 'h'},
{0, 0, 0, 0}
};
args = eCreate_value_space(NULL, 21);
eAdd_value(args, "daemon", "0");
eAdd_value(args, "configfile", "/etc/rteval.conf");
eAdd_value(args, "threads", "4");
while( 1 ) {
optidx = 0;
c = getopt_long(argc, argv, "l:L:f:t:dh", long_opts, &optidx);
if( c == -1 ) {
break;
}
switch( c ) {
case 'l':
eUpdate_value(args, "log", optarg, 1);
break;
case 'L':
eUpdate_value(args, "loglevel", optarg, 1);
break;
case 'f':
eUpdate_value(args, "configfile", optarg, 0);
break;
case 't':
eUpdate_value(args, "threads", optarg, 0);
break;
case 'd':
eUpdate_value(args, "daemon", "1", 0);
break;
case 'h':
usage();
exit(0);
}
}
// If logging is not configured, and it is not run as a daemon
// -> log to stderr:
if( (eGet_value(args, "log") == NULL)
&& (atoi_nullsafe(eGet_value(args, "daemon")) == 0) ) {
eAdd_value(args, "log", "stderr:");
}
return args;
}
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