Resolve IP as hostname (unix console tool)

getip.c

/*
 * `getip.c'
 * 
 * Copyright (C) 2015, 2016 Lukas Himsel <[email protected]>
 * 
 * This program 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.
 * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Installation:
 * Type `cc -O2 getip.c -o getip` into your console.
 *
 * Arguments & Usage:
 * `getip <HOSTNAME>` for the standard output, with Hostname and IP, etc.
 * `getip <HOSTNAME> --ip` prints only the IP address, nothing more.
 *
 */

#include <stdio.h>
#include <arpa/inet.h>
#include <netdb.h>

int parse_args(int argc, char *argv[]);

int main(int argc, char *argv[]){
	struct hostent *host;
	struct in_addr *ip;
	if(parse_args(argc, argv)){
		puts("\033[1;34mgetip\033[0m <hostname> \033[32m[opts.]\033[0m\n options:\n \033[32m--ip\033[0m\tprint only IP addr.");
		return 1;
	}
	host = gethostbyname(argv[1]);
	if(host == NULL){
		fprintf(stderr, "can not reach host: %s\n",argv[1]);
		return 1;
	}
	ip = (struct in_addr *) host->h_addr;
  
  
	if(argv[2]!=NULL){
		if(strcmp(argv[2],"--ip")==0){
			printf("%s\n", inet_ntoa(*ip));
		}
	} else{
		printf("\033[1;34mHost:\033[0m %s\n\033[1;34mIP:\033[0m %s\n", host->h_name, inet_ntoa(*ip));
	}
	return 0;
}

int parse_args(int argc, char *argv[]){
	if(argc < 2){
		return 1;
	}
	if(strcmp(argv[1], "--help")==0 || strcmp(argv[1], "-h")==0){
		return 1;
	}
	else{
		return 0;
	}
}