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add pre-pre-alpha
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163
Daemons/weatherdaemon_multimeteo/cmdlnopts.c
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163
Daemons/weatherdaemon_multimeteo/cmdlnopts.c
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/*
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* This file is part of the weatherdaemon project.
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* Copyright 2025 Edward V. Emelianov <edward.emelianoff@gmail.com>.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <strings.h>
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#include <usefull_macros.h>
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#include "cmdlnopts.h"
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/*
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* here are global parameters initialisation
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*/
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int help;
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// default values for Gdefault & help
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#define DEFAULT_PORT "12345"
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#define DEFAULT_PID "/tmp/weatherdaemon.pid"
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// DEFAULTS
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// default global parameters
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static glob_pars defpars = {
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.port = DEFAULT_PORT,
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.logfile = NULL,
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.verb = 0,
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.pidfile = DEFAULT_PID
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};
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// default config: all values should be wrong or empty to understand than user change them
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static glob_pars defconf = {
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.verb = -1,
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};
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static glob_pars G;
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/*
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* Define command line options by filling structure:
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* name has_arg flag val type argptr help
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*/
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#define COMMON_OPTS \
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{"port", NEED_ARG, NULL, 0, arg_string, APTR(&G.port), "network port to connect (default: " DEFAULT_PORT "); hint: use \"localhost:port\" to make local net socket"}, \
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{"logfile", NEED_ARG, NULL, 'l', arg_string, APTR(&G.logfile), "save logs to file (default: none)"}, \
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{"pidfile", NEED_ARG, NULL, 'P', arg_string, APTR(&G.pidfile), "pidfile name (default: " DEFAULT_PID ")"}, \
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{"sockpath",NEED_ARG, NULL, 0, arg_string, APTR(&G.sockname), "UNIX socket path (starting from '\\0' for anonimous) of command socket"}, \
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{"plugin", MULT_PAR, NULL, 'p', arg_string, APTR(&G.plugins), "add this weather plugin (may be a lot of)"},
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sl_option_t cmdlnopts[] = {
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{"help", NO_ARGS, NULL, 'h', arg_int, APTR(&help), "show this help"},
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{"conffile",NEED_ARG, NULL, 'c', arg_string, APTR(&G.conffile), "configuration file name (consists all or a part of long-named parameters and their values (e.g. plugin=liboldweather.so)"},
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{"verb", NO_ARGS, NULL, 'v', arg_none, APTR(&G.verb), "logfile verbocity level (each -v increased)"}, \
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COMMON_OPTS
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end_option
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};
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sl_option_t confopts[] = {
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{"verbose", NEED_ARG, NULL, 'v', arg_int, APTR(&G.verb), "logfile verbocity level"}, \
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COMMON_OPTS
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end_option
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};
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static int sortstrings(const void *v1, const void *v2){
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const char **s1 = (const char **)v1, **s2 = (const char **)v2;
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return strcmp(*s1, *s2);
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}
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// compare plugins from configuration and command line; add to command line plugins all new
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static void compplugins(glob_pars *cmdline, glob_pars *conf){
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if(!cmdline) return;
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char **p;
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int nconf = 0;
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if(conf){
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p = conf->plugins;
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if(p && *p) while(*p++) ++nconf;
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}
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int ncmd = 0;
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p = cmdline->plugins;
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if(p && *p) while(*p++) ++ncmd;
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DBG("Got %d plugins in conf and %d in cmdline", nconf, ncmd);
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// compare plugins and rebuild new list
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int newsize = ncmd + nconf;
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if(newsize == 0) return; // no plugins in both
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char **newarray = MALLOC(char*, newsize + 1); // +1 for ending NULL
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for(int i = 0; i < ncmd; ++i){ newarray[i] = cmdline->plugins[i]; }
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FREE(cmdline->plugins);
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if(conf){
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for(int i = 0; i < nconf; ++i){ newarray[i+ncmd] = conf->plugins[i]; }
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FREE(conf->plugins);
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}
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qsort(newarray, newsize, sizeof(char*), sortstrings);
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DBG("NOW together:"); p = newarray; while(*p) printf("\t%s\n", *p++);
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p = newarray;
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int nondobuleidx = 0;
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for(int i = 0; i < newsize;){
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int j = i + 1;
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for(; j < newsize; ++j){
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if(strcmp(newarray[i], newarray[j])) break;
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FREE(newarray[j]);
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}
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if(nondobuleidx != i){
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newarray[nondobuleidx] = newarray[i];
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newarray[i] = NULL;
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}
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++nondobuleidx;
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i = j;
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}
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DBG("Result:"); p = newarray; while(*p) printf("\t%s\n", *p++);
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cmdline->plugins = newarray;
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cmdline->nplugins = nondobuleidx;
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}
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/**
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* Parse command line options and return dynamically allocated structure
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* to global parameters
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* @param argc - copy of argc from main
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* @param argv - copy of argv from main
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* @return allocated structure with global parameters
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*/
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glob_pars *parse_args(int argc, char **argv){
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G = defpars; // copy defaults
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// format of help: "Usage: progname [args]\n"
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sl_helpstring("Usage: %s [args]\n\t" COLOR_RED "Be careful: command line options have priority over config" COLOR_OLD "\n\tWhere args are:\n");
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// parse arguments
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sl_parseargs(&argc, &argv, cmdlnopts);
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DBG("verb: %d", G.verb);
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if(help) sl_showhelp(-1, cmdlnopts);
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if(argc > 0){
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WARNX("You give %d unused parameters:", argc);
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while(argc) printf("\t%s\n", argv[--argc]);
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}
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DBG("PARS: \n-------------\n%s-------------\n\n", sl_print_opts(cmdlnopts, 1));
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if(G.conffile){ // read conffile and fix parameters (cmdline args are in advantage)
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glob_pars oldpars = G; // save cmdline opts
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G = defconf;
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if(!sl_conf_readopts(oldpars.conffile, confopts)) ERRX("Can't get options from %s", G.conffile);
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DBG("CONF: \n-------------\n%s-------------\n\n", sl_print_opts(confopts, 1));
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if((0 == strcmp(oldpars.port, DEFAULT_PORT)) && G.port) oldpars.port = G.port;
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if(!oldpars.logfile && G.logfile) oldpars.logfile = G.logfile;
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if(!oldpars.verb && G.verb > -1) oldpars.verb = G.verb;
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if((0 == strcmp(oldpars.pidfile, DEFAULT_PID)) && G.pidfile) oldpars.pidfile = G.pidfile;
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if(!oldpars.sockname && G.sockname) oldpars.sockname = G.sockname;
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// now check plugins
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compplugins(&oldpars, &G);
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G = oldpars;
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}else compplugins(&G, NULL);
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DBG("RESULT: \n-------------\n%s-------------\n\n", sl_print_opts(cmdlnopts, 1));
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DBG("Nplugins = %d", G.nplugins);
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return &G;
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}
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