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84 lines
3.1 KiB
C
84 lines
3.1 KiB
C
/* geany_encoding=koi8-r
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* cmdlnopts.c - the only function that parse cmdln args and returns glob parameters
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*
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* Copyright 2013 Edward V. Emelianoff <eddy@sao.ru>
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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 2 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#include <assert.h>
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#include <stdarg.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 "cmdlnopts.h"
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#include "usefull_macros.h"
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/*
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* here are global parameters initialisation
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*/
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static int help;
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sl_loglevel_e verblvl = LOGLEVEL_WARN;
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glob_pars GP = {
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.baudrate = 9600,
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.device = "/dev/ttyUSB0",
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.nodenum = 1,
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.port = "9000",
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};
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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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static sl_option_t cmdlnopts[] = {
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{"help", NO_ARGS, NULL, 'h', arg_int, APTR(&help), "show this help"},
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{"verbose", NO_ARGS, NULL, 'v', arg_none, APTR(&GP.verbose), "verbose level for (each `-v` increase it)"},
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{"logfile", NEED_ARG, NULL, 'l', arg_string, APTR(&GP.logfile), "logging file name"},
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{"baudrate",NEED_ARG, NULL, 'b', arg_int, APTR(&GP.baudrate), "interface baudrate (default: 9600)"},
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{"device", NEED_ARG, NULL, 'd', arg_string, APTR(&GP.device), "serial device path (default: /dev/ttyUSB0)"},
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{"node", NEED_ARG, NULL, 'n', arg_int, APTR(&GP.nodenum), "node number (default: 1)"},
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{"port", NEED_ARG, NULL, 'p', arg_string, APTR(&GP.port), "socket port (default: 9000)"},
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end_option
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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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void parse_args(int argc, char **argv){
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size_t hlen = 1024;
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char helpstring[1024], *hptr = helpstring;
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snprintf(hptr, hlen, "Usage: %%s [args]\n\n\tWhere args are:\n");
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// format of help: "Usage: progname [args]\n"
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sl_helpstring(helpstring);
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// parse arguments
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sl_parseargs(&argc, &argv, cmdlnopts);
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if(help) sl_showhelp(-1, cmdlnopts);
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if(argc > 0) WARNX("Omit %d unexpected arguments", argc);
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}
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void verbose(sl_loglevel_e lvl, const char *fmt, ...){
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if(lvl > verblvl) return;
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va_list ar;
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va_start(ar, fmt);
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vprintf(fmt, ar);
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va_end(ar);
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fflush(stdout);
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}
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