others
/* $Id$ */
/* Copyright (c) 2014-2016 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Unix others */
/* 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, version 3 of the License.
*
* 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/>. */
#include <unistd.h>
#include <stdio.h>
#include <netdb.h>
#include <arpa/inet.h>
/* servid */
/* private */
/* prototypes */
static int _servid(char const * protocol, char const * service);
static int _servid_error(char const * message, int ret);
static int _servid_usage(void);
/* functions */
/* servid */
static int _servid(char const * protocol, char const * service)
{
struct servent * se;
setservent(1);
if((se = getservbyname(service, protocol)) == NULL)
return _servid_error(service, 1);
printf("%d/%s\n", ntohs(se->s_port), se->s_proto);
return 0;
}
/* servid_error */
static int _servid_error(char const * message, int ret)
{
fprintf(stderr, "%s: %s: %s\n", "servid", message, "Service not found");
return ret;
}
/* servid_usage */
static int _servid_usage(void)
{
fputs("Usage: servid -P protocol service...\n", stderr);
return 1;
}
/* public */
/* functions */
/* main */
int main(int argc, char * argv[])
{
char const * protocol = NULL;
int o;
int i;
while((o = getopt(argc, argv, "P:")) != -1)
switch(o)
{
case 'P':
protocol = optarg;
break;
default:
return _servid_usage();
}
if(protocol == NULL || optind == argc)
return _servid_usage();
for(i = optind; i < argc; i++)
/* XXX report errors */
_servid(protocol, argv[i]);
return 0;
}