example-clients/alias.c

   1 /*
   2     This program is free software; you can redistribute it and/or modify
   3     it under the terms of the GNU General Public License as published by
   4     the Free Software Foundation; either version 2 of the License, or
   5     (at your option) any later version.
   6
   7     This program is distributed in the hope that it will be useful,
   8     but WITHOUT ANY WARRANTY; without even the implied warranty of
   9     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10     GNU General Public License for more details.
  11
  12     You should have received a copy of the GNU General Public License
  13     along with this program; if not, write to the Free Software
  14     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  15 */
  16
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <unistd.h>
  20 #include <string.h>
  21 #include <getopt.h>
  22 #include <jack/jack.h>
  23
  24 char * my_name;
  25
  26 void
  27 show_version (void)
  28 {
  29         //fprintf (stderr, "%s: JACK Audio Connection Kit version " VERSION "\n", my_name);
  30 }
  31
  32 void
  33 show_usage (void)
  34 {
  35         show_version ();
  36         fprintf (stderr, "\nUsage: %s [options] portname alias\n", my_name);
  37         fprintf (stderr, "List active Jack ports, and optionally display extra information.\n\n");
  38         fprintf (stderr, "Display options:\n");
  39         fprintf (stderr, "        -u, --unalias         remove `alias' as an alias for `port'\n");
  40         fprintf (stderr, "        -h, --help            Display this help message\n");
  41         fprintf (stderr, "        --version             Output version information and exit\n\n");
  42         fprintf (stderr, "For more information see http://jackaudio.org/\n");
  43 }
  44
  45 int
  46 main (int argc, char *argv[])
  47 {
  48         jack_client_t *client;
  49         jack_status_t status;
  50         char* portname;
  51         char* alias;
  52         int unset = 0;
  53         int ret;
  54         int c;
  55         int option_index;
  56         extern int optind;
  57         jack_port_t* port;
  58
  59         struct option long_options[] = {
  60                 { "unalias", 0, 0, 'u' },
  61                 { "help", 0, 0, 'h' },
  62                 { "version", 0, 0, 'v' },
  63                 { 0, 0, 0, 0 }
  64         };
  65
  66         if (argc < 3) {
  67                 show_usage ();
  68                 return 1;
  69         }
  70
  71         my_name = strrchr(argv[0], '/');
  72         if (my_name == 0) {
  73                 my_name = argv[0];
  74         } else {
  75                 my_name ++;
  76         }
  77
  78         while ((c = getopt_long (argc, argv, "uhv", long_options, &option_index)) >= 0) {
  79                 switch (c) {
  80                 case 'u':
  81                         unset = 1;
  82                         break;
  83                 case 'h':
  84                         show_usage ();
  85                         return 1;
  86                         break;
  87                 case 'v':
  88                         show_version ();
  89                         return 1;
  90                         break;
  91                 default:
  92                         show_usage ();
  93                         return 1;
  94                         break;
  95                 }
  96         }
  97
  98         portname = argv[optind++];
  99         alias = argv[optind];
 100
 101         /* Open a client connection to the JACK server.  Starting a
 102          * new server only to list its ports seems pointless, so we
 103          * specify JackNoStartServer. */
 104         //JOQ: need a new server name option
 105
 106         client = jack_client_open ("lsp", JackNoStartServer, &status);
 107
 108         if (client == NULL) {
 109                 if (status & JackServerFailed) {
 110                         fprintf (stderr, "JACK server not running\n");
 111                 } else {
 112                         fprintf (stderr, "jack_client_open() failed, "
 113                                  "status = 0x%2.0x\n", status);
 114                 }
 115                 return 1;
 116         }
 117
 118         if ((port = jack_port_by_name (client, portname)) == 0) {
 119                 fprintf (stderr, "No port named \"%s\"\n", portname);
 120                 return 1;
 121         }
 122
 123         if (!unset) {
 124                 ret = jack_port_set_alias (port, alias);
 125         } else {
 126                 ret = jack_port_unset_alias (port, alias);
 127         }
 128
 129         jack_client_close (client);
 130
 131         return ret;
 132
 133 }