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#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>
#include <getopt.h>
#include <jack/jack.h>
#include <jack/intclient.h>
jack_client_t *client;
jack_intclient_t intclient;
char *client_name;
char *intclient_name;
char *load_name;
char *load_init = NULL;
char *server_name = NULL;
int wait_opt = 0;
void
signal_handler (int sig)
{
jack_status_t status;
fprintf (stderr, "signal received, unloading...");
status = jack_internal_client_unload (client, intclient);
if (status & JackFailure)
fprintf (stderr, "(failed), status = 0x%x\n", status);
else
fprintf (stderr, "(succeeded)\n");
jack_client_close (client);
exit (0);
}
void
show_usage ()
{
fprintf (stderr, "usage: %s [ options ] client-name [ load-name "
"[ init-string]]\n\noptions:\n", client_name);
fprintf (stderr,
"\t-h, --help \t\t print help message\n"
"\t-i, --init string\t initialize string\n"
"\t-s, --server name\t select JACK server\n"
"\t-w, --wait \t\t wait for signal, then unload\n"
"\n"
);
}
int
parse_args (int argc, char *argv[])
{
int c;
int option_index = 0;
char *short_options = "hi:s:w";
struct option long_options[] = {
{ "help", 0, 0, 'h' },
{ "init", required_argument, 0, 'i' },
{ "server", required_argument, 0, 's' },
{ "wait", 0, 0, 'w' },
{ 0, 0, 0, 0 }
};
client_name = strrchr(argv[0], '/');
if (client_name == NULL) {
client_name = argv[0];
} else {
client_name++;
}
while ((c = getopt_long (argc, argv, short_options, long_options,
&option_index)) >= 0) {
switch (c) {
case 'i':
load_init = optarg;
break;
case 's':
server_name = optarg;
break;
case 'w':
wait_opt = 1;
break;
case 'h':
default:
show_usage ();
return 1;
}
}
if (optind == argc) { /* no positional args? */
show_usage ();
return 1;
}
if (optind < argc)
load_name = intclient_name = argv[optind++];
if (optind < argc)
load_name = argv[optind++];
if (optind < argc)
load_init = argv[optind++];
//fprintf (stderr, "client-name = `%s', load-name = `%s', "
// "load-init = `%s', wait = %d\n",
// intclient_name, load_name, load_init, wait_opt);
return 0; /* args OK */
}
int
main (int argc, char *argv[])
{
jack_status_t status;
/* parse and validate command arguments */
if (parse_args (argc, argv))
exit (1); /* invalid command line */
/* first, become a JACK client */
client = jack_client_open (client_name, JackServerName,
&status, server_name);
if (client == NULL) {
fprintf (stderr, "jack_client_open() failed, status = 0x%x\n",
status);
if (status & JackServerFailed) {
fprintf (stderr, "Unable to connect to JACK server\n");
}
exit (1);
}
if (status & JackServerStarted) {
fprintf (stderr, "JACK server started\n");
}
if (status & JackNameNotUnique) {
client_name = jack_get_client_name(client);
fprintf (stderr, "unique name `%s' assigned\n", client_name);
}
/* then, load the internal client */
intclient = jack_internal_client_load (client, intclient_name,
(JackLoadName|JackLoadInit),
&status, load_name, load_init);
if (status & JackFailure) {
fprintf (stderr, "could not load %s, status = %d\n",
load_name, status);
return 2;
}
if (status & JackNameNotUnique) {
intclient_name =
jack_get_internal_client_name (client, intclient);
fprintf (stderr, "unique internal client name `%s' assigned\n",
intclient_name);
}
fprintf (stdout, "%s is running.\n", load_name);
if (wait_opt) {
/* define a signal handler to unload the client, then
* wait for it to exit */
signal (SIGQUIT, signal_handler);
signal (SIGTERM, signal_handler);
signal (SIGHUP, signal_handler);
signal (SIGINT, signal_handler);
while (1) {
sleep (1);
}
}
return 0;
}
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