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/* $Id$ */
/***
This file is part of avahi.
avahi is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
avahi 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 Lesser General
Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with avahi; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
USA.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <stdio.h>
#include <getopt.h>
#include <assert.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <locale.h>
#include <avahi-common/simple-watch.h>
#include <avahi-common/error.h>
#include <avahi-common/malloc.h>
#include <avahi-common/domain.h>
#include <avahi-client/client.h>
#include "sigint.h"
typedef enum {
COMMAND_UNSPEC,
COMMAND_HELP,
COMMAND_VERSION,
} Command;
typedef struct Config {
int verbose;
Command command;
} Config;
static AvahiSimplePoll *simple_poll = NULL;
static AvahiClient *client = NULL;
static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) {
switch (state) {
case AVAHI_CLIENT_FAILURE:
fprintf(stderr, "Client failure, exiting: %s\n", avahi_strerror(avahi_client_errno(c)));
avahi_simple_poll_quit(simple_poll);
break;
case AVAHI_CLIENT_S_REGISTERING:
case AVAHI_CLIENT_S_RUNNING:
case AVAHI_CLIENT_S_COLLISION:
case AVAHI_CLIENT_CONNECTING:
;
}
}
static void help(FILE *f, const char *argv0) {
fprintf(f,
"%s [options] <new host name>\n\n"
" -h --help Show this help\n"
" -V --version Show version\n"
" -v --verbose Enable verbose mode\n",
argv0);
}
static int parse_command_line(Config *c, int argc, char *argv[]) {
int o;
static const struct option long_options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ "verbose", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 }
};
assert(c);
c->command = COMMAND_UNSPEC;
c->verbose = 0;
while ((o = getopt_long(argc, argv, "hVv", long_options, NULL)) >= 0) {
switch(o) {
case 'h':
c->command = COMMAND_HELP;
break;
case 'V':
c->command = COMMAND_VERSION;
break;
case 'v':
c->verbose = 1;
break;
default:
return -1;
}
}
if (c->command == COMMAND_UNSPEC) {
if (optind != argc-1) {
fprintf(stderr, "Invalid number of arguments, expecting exactly one.\n");
return -1;
}
}
return 0;
}
int main(int argc, char *argv[]) {
int ret = 1, error;
Config config;
const char *argv0;
if ((argv0 = strrchr(argv[0], '/')))
argv0++;
else
argv0 = argv[0];
if (parse_command_line(&config, argc, argv) < 0)
goto fail;
switch (config.command) {
case COMMAND_HELP:
help(stdout, argv0);
ret = 0;
break;
case COMMAND_VERSION:
printf("%s "PACKAGE_VERSION"\n", argv0);
ret = 0;
break;
case COMMAND_UNSPEC:
if (!(simple_poll = avahi_simple_poll_new())) {
fprintf(stderr, "Failed to create simple poll object.\n");
goto fail;
}
if (sigint_install(simple_poll) < 0)
goto fail;
if (!(client = avahi_client_new(avahi_simple_poll_get(simple_poll), 0, client_callback, NULL, &error))) {
fprintf(stderr, "Failed to create client object: %s\n", avahi_strerror(error));
goto fail;
}
if (config.verbose) {
const char *version, *hn;
if (!(version = avahi_client_get_version_string(client))) {
fprintf(stderr, "Failed to query version string: %s\n", avahi_strerror(avahi_client_errno(client)));
goto fail;
}
if (!(hn = avahi_client_get_host_name_fqdn(client))) {
fprintf(stderr, "Failed to query host name: %s\n", avahi_strerror(avahi_client_errno(client)));
goto fail;
}
fprintf(stderr, "Server version: %s; Host name: %s\n", version, hn);
}
if (avahi_client_set_host_name(client, argv[optind]) < 0) {
fprintf(stderr, "Failed to create host name resolver: %s\n", avahi_strerror(avahi_client_errno(client)));
goto fail;
}
if (config.verbose) {
const char *hn;
if (!(hn = avahi_client_get_host_name_fqdn(client))) {
fprintf(stderr, "Failed to query host name: %s\n", avahi_strerror(avahi_client_errno(client)));
goto fail;
}
fprintf(stderr, "Host name successfully changed to %s\n", hn);
}
ret = 0;
break;
}
fail:
if (client)
avahi_client_free(client);
sigint_uninstall();
if (simple_poll)
avahi_simple_poll_free(simple_poll);
return ret;
}
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