From 0cbaf99fc5eea82006dbc07f6c561e5d6d9cefba Mon Sep 17 00:00:00 2001 From: Lennart Poettering Date: Tue, 22 Aug 2006 02:27:14 +0000 Subject: [PATCH] add new utility "avahi-set-host-name" for changing the mDNS host name during runtime git-svn-id: file:///home/lennart/svn/public/avahi/trunk@1263 941a03a8-eaeb-0310-b9a0-b1bbd8fe43fe --- avahi-utils/Makefile.am | 6 +- avahi-utils/avahi-set-host-name.c | 211 ++++++++++++++++++++++++++++++ 2 files changed, 216 insertions(+), 1 deletion(-) create mode 100644 avahi-utils/avahi-set-host-name.c diff --git a/avahi-utils/Makefile.am b/avahi-utils/Makefile.am index d684be1..3d371b0 100644 --- a/avahi-utils/Makefile.am +++ b/avahi-utils/Makefile.am @@ -24,7 +24,7 @@ AM_CFLAGS+='-DDEBUG_TRAP=__asm__("int $$3")' if HAVE_DBUS -bin_PROGRAMS = avahi-browse avahi-resolve avahi-publish +bin_PROGRAMS = avahi-browse avahi-resolve avahi-publish avahi-set-host-name avahi_browse_SOURCES = avahi-browse.c sigint.c sigint.h avahi_browse_CFLAGS = $(AM_CFLAGS) @@ -49,6 +49,10 @@ avahi_publish_SOURCES = avahi-publish.c sigint.c sigint.h avahi_publish_CFLAGS = $(AM_CFLAGS) avahi_publish_LDADD = $(AM_LDADD) ../avahi-client/libavahi-client.la ../avahi-common/libavahi-common.la +avahi_set_host_name_SOURCES = avahi-set-host-name.c sigint.c sigint.h +avahi_set_host_name_CFLAGS = $(AM_CFLAGS) +avahi_set_host_name_LDADD = $(AM_LDADD) ../avahi-client/libavahi-client.la ../avahi-common/libavahi-common.la + install-exec-local: cd $(DESTDIR)/$(bindir) && \ rm -f avahi-resolve-host-name avahi-resolve-address avahi-browse-domains avahi-publish-address avahi-publish-service && \ diff --git a/avahi-utils/avahi-set-host-name.c b/avahi-utils/avahi-set-host-name.c new file mode 100644 index 0000000..06f5322 --- /dev/null +++ b/avahi-utils/avahi-set-host-name.c @@ -0,0 +1,211 @@ +/* $Id$ */ + +/*** + 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 +#endif + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#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] \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; + + opterr = 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: + fprintf(stderr, "Invalid command line argument: %c\n", o); + 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; +} -- 2.39.5