seq/aconnect/aconnect.c

   1 /*
   2  * connect / disconnect two subscriber ports
   3  *   ver.0.1.3
   4  *
   5  * Copyright (C) 1999 Takashi Iwai
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  */
  17
  18 #include <stdio.h>
  19 #include <ctype.h>
  20 #include <string.h>
  21 #include <stdlib.h>
  22 #include <errno.h>
  23 #include <fcntl.h>
  24 #include <getopt.h>
  25 #include <stdarg.h>
  26 #include <locale.h>
  27 #include <sys/ioctl.h>
  28 #include <alsa/asoundlib.h>
  29 #include "aconfig.h"
  30 #include "gettext.h"
  31
  32 static void error_handler(const char *file, int line, const char *function, int err, const char *fmt, ...)
  33 {
  34         va_list arg;
  35
  36         if (err == ENOENT)      /* Ignore those misleading "warnings" */
  37                 return;
  38         va_start(arg, fmt);
  39         fprintf(stderr, "ALSA lib %s:%i:(%s) ", file, line, function);
  40         vfprintf(stderr, fmt, arg);
  41         if (err)
  42                 fprintf(stderr, ": %s", snd_strerror(err));
  43         putc('\n', stderr);
  44         va_end(arg);
  45 }
  46
  47 static void usage(void)
  48 {
  49         printf(_("aconnect - ALSA sequencer connection manager\n"));
  50         printf(_("Copyright (C) 1999-2000 Takashi Iwai\n"));
  51         printf(_("Usage:\n"));
  52         printf(_(" * Connection/disconnection between two ports\n"));
  53         printf(_("   aconnect [-options] sender receiver\n"));
  54         printf(_("     sender, receiver = client:port pair\n"));
  55         printf(_("     -d,--disconnect     disconnect\n"));
  56         printf(_("     -e,--exclusive      exclusive connection\n"));
  57         printf(_("     -r,--real #         convert real-time-stamp on queue\n"));
  58         printf(_("     -t,--tick #         convert tick-time-stamp on queue\n"));
  59         printf(_(" * List connected ports (no subscription action)\n"));
  60         printf(_("   aconnect -i|-o [-options]\n"));
  61         printf(_("     -i,--input          list input (readable) ports\n"));
  62         printf(_("     -o,--output         list output (writable) ports\n"));
  63         printf(_("     -l,--list           list current connections of each port\n"));
  64         printf(_(" * Remove all exported connections\n"));
  65         printf(_("     -x, --removeall\n"));
  66 }
  67
  68 /*
  69  * check permission (capability) of specified port
  70  */
  71
  72 #define LIST_INPUT      1
  73 #define LIST_OUTPUT     2
  74
  75 #define perm_ok(pinfo,bits) ((snd_seq_port_info_get_capability(pinfo) & (bits)) == (bits))
  76
  77 static int check_permission(snd_seq_port_info_t *pinfo, int perm)
  78 {
  79         if (perm) {
  80                 if (perm & LIST_INPUT) {
  81                         if (perm_ok(pinfo, SND_SEQ_PORT_CAP_READ|SND_SEQ_PORT_CAP_SUBS_READ))
  82                                 goto __ok;
  83                 }
  84                 if (perm & LIST_OUTPUT) {
  85                         if (perm_ok(pinfo, SND_SEQ_PORT_CAP_WRITE|SND_SEQ_PORT_CAP_SUBS_WRITE))
  86                                 goto __ok;
  87                 }
  88                 return 0;
  89         }
  90  __ok:
  91         if (snd_seq_port_info_get_capability(pinfo) & SND_SEQ_PORT_CAP_NO_EXPORT)
  92                 return 0;
  93         return 1;
  94 }
  95
  96 /*
  97  * list subscribers of specified type
  98  */
  99 static void list_each_subs(snd_seq_t *seq, snd_seq_query_subscribe_t *subs, int type, const char *msg)
 100 {
 101         int count = 0;
 102         snd_seq_query_subscribe_set_type(subs, type);
 103         snd_seq_query_subscribe_set_index(subs, 0);
 104         while (snd_seq_query_port_subscribers(seq, subs) >= 0) {
 105                 const snd_seq_addr_t *addr;
 106                 if (count++ == 0)
 107                         printf("\t%s: ", msg);
 108                 else
 109                         printf(", ");
 110                 addr = snd_seq_query_subscribe_get_addr(subs);
 111                 printf("%d:%d", addr->client, addr->port);
 112                 if (snd_seq_query_subscribe_get_exclusive(subs))
 113                         printf("[ex]");
 114                 if (snd_seq_query_subscribe_get_time_update(subs))
 115                         printf("[%s:%d]",
 116                                (snd_seq_query_subscribe_get_time_real(subs) ? "real" : "tick"),
 117                                snd_seq_query_subscribe_get_queue(subs));
 118                 snd_seq_query_subscribe_set_index(subs, snd_seq_query_subscribe_get_index(subs) + 1);
 119         }
 120         if (count > 0)
 121                 printf("\n");
 122 }
 123
 124 /*
 125  * list subscribers
 126  */
 127 static void list_subscribers(snd_seq_t *seq, const snd_seq_addr_t *addr)
 128 {
 129         snd_seq_query_subscribe_t *subs;
 130         snd_seq_query_subscribe_alloca(&subs);
 131         snd_seq_query_subscribe_set_root(subs, addr);
 132         list_each_subs(seq, subs, SND_SEQ_QUERY_SUBS_READ, _("Connecting To"));
 133         list_each_subs(seq, subs, SND_SEQ_QUERY_SUBS_WRITE, _("Connected From"));
 134 }
 135
 136 /*
 137  * search all ports
 138  */
 139 typedef void (*action_func_t)(snd_seq_t *seq, snd_seq_client_info_t *cinfo, snd_seq_port_info_t *pinfo, int count);
 140
 141 static void do_search_port(snd_seq_t *seq, int perm, action_func_t do_action)
 142 {
 143         snd_seq_client_info_t *cinfo;
 144         snd_seq_port_info_t *pinfo;
 145         int count;
 146
 147         snd_seq_client_info_alloca(&cinfo);
 148         snd_seq_port_info_alloca(&pinfo);
 149         snd_seq_client_info_set_client(cinfo, -1);
 150         while (snd_seq_query_next_client(seq, cinfo) >= 0) {
 151                 /* reset query info */
 152                 snd_seq_port_info_set_client(pinfo, snd_seq_client_info_get_client(cinfo));
 153                 snd_seq_port_info_set_port(pinfo, -1);
 154                 count = 0;
 155                 while (snd_seq_query_next_port(seq, pinfo) >= 0) {
 156                         if (check_permission(pinfo, perm)) {
 157                                 do_action(seq, cinfo, pinfo, count);
 158                                 count++;
 159                         }
 160                 }
 161         }
 162 }
 163
 164
 165 static void print_port(snd_seq_t *seq, snd_seq_client_info_t *cinfo,
 166                        snd_seq_port_info_t *pinfo, int count)
 167 {
 168         if (! count) {
 169                 printf(_("client %d: '%s' [type=%s]\n"),
 170                        snd_seq_client_info_get_client(cinfo),
 171                        snd_seq_client_info_get_name(cinfo),
 172                        (snd_seq_client_info_get_type(cinfo) == SND_SEQ_USER_CLIENT ?
 173                         _("user") : _("kernel")));
 174         }
 175         printf("  %3d '%-16s'\n",
 176                snd_seq_port_info_get_port(pinfo),
 177                snd_seq_port_info_get_name(pinfo));
 178 }
 179
 180 static void print_port_and_subs(snd_seq_t *seq, snd_seq_client_info_t *cinfo,
 181                                 snd_seq_port_info_t *pinfo, int count)
 182 {
 183         print_port(seq, cinfo, pinfo, count);
 184         list_subscribers(seq, snd_seq_port_info_get_addr(pinfo));
 185 }
 186
 187
 188 /*
 189  * remove all (exported) connections
 190  */
 191 static void remove_connection(snd_seq_t *seq, snd_seq_client_info_t *cinfo,
 192                               snd_seq_port_info_t *pinfo, int count)
 193 {
 194         snd_seq_query_subscribe_t *query;
 195         snd_seq_port_info_t *port;
 196         snd_seq_port_subscribe_t *subs;
 197
 198         snd_seq_query_subscribe_alloca(&query);
 199         snd_seq_query_subscribe_set_root(query, snd_seq_port_info_get_addr(pinfo));
 200         snd_seq_query_subscribe_set_type(query, SND_SEQ_QUERY_SUBS_READ);
 201         snd_seq_query_subscribe_set_index(query, 0);
 202
 203         snd_seq_port_info_alloca(&port);
 204         snd_seq_port_subscribe_alloca(&subs);
 205
 206         while (snd_seq_query_port_subscribers(seq, query) >= 0) {
 207                 const snd_seq_addr_t *sender = snd_seq_query_subscribe_get_root(query);
 208                 const snd_seq_addr_t *dest = snd_seq_query_subscribe_get_addr(query);
 209
 210                 if (snd_seq_get_any_port_info(seq, dest->client, dest->port, port) < 0 ||
 211                     !(snd_seq_port_info_get_capability(port) & SND_SEQ_PORT_CAP_SUBS_WRITE) ||
 212                     (snd_seq_port_info_get_capability(port) & SND_SEQ_PORT_CAP_NO_EXPORT)) {
 213                         snd_seq_query_subscribe_set_index(query, snd_seq_query_subscribe_get_index(query) + 1);
 214                         continue;
 215                 }
 216                 snd_seq_port_subscribe_set_queue(subs, snd_seq_query_subscribe_get_queue(query));
 217                 snd_seq_port_subscribe_set_sender(subs, sender);
 218                 snd_seq_port_subscribe_set_dest(subs, dest);
 219                 if (snd_seq_unsubscribe_port(seq, subs) < 0) {
 220                         snd_seq_query_subscribe_set_index(query, snd_seq_query_subscribe_get_index(query) + 1);
 221                 }
 222         }
 223 }
 224
 225 static void remove_all_connections(snd_seq_t *seq)
 226 {
 227         do_search_port(seq, 0, remove_connection);
 228 }
 229
 230
 231 /*
 232  * main..
 233  */
 234
 235 enum {
 236         SUBSCRIBE, UNSUBSCRIBE, LIST, REMOVE_ALL
 237 };
 238
 239 static const struct option long_option[] = {
 240         {"disconnect", 0, NULL, 'd'},
 241         {"input", 0, NULL, 'i'},
 242         {"output", 0, NULL, 'o'},
 243         {"real", 1, NULL, 'r'},
 244         {"tick", 1, NULL, 't'},
 245         {"exclusive", 0, NULL, 'e'},
 246         {"list", 0, NULL, 'l'},
 247         {"removeall", 0, NULL, 'x'},
 248         {NULL, 0, NULL, 0},
 249 };
 250
 251 int main(int argc, char **argv)
 252 {
 253         int c;
 254         snd_seq_t *seq;
 255         int queue = 0, convert_time = 0, convert_real = 0, exclusive = 0;
 256         int command = SUBSCRIBE;
 257         int list_perm = 0;
 258         int client;
 259         int list_subs = 0;
 260         snd_seq_port_subscribe_t *subs;
 261         snd_seq_addr_t sender, dest;
 262
 263 #ifdef ENABLE_NLS
 264         setlocale(LC_ALL, "");
 265         textdomain(PACKAGE);
 266 #endif
 267
 268         while ((c = getopt_long(argc, argv, "dior:t:elx", long_option, NULL)) != -1) {
 269                 switch (c) {
 270                 case 'd':
 271                         command = UNSUBSCRIBE;
 272                         break;
 273                 case 'i':
 274                         command = LIST;
 275                         list_perm |= LIST_INPUT;
 276                         break;
 277                 case 'o':
 278                         command = LIST;
 279                         list_perm |= LIST_OUTPUT;
 280                         break;
 281                 case 'e':
 282                         exclusive = 1;
 283                         break;
 284                 case 'r':
 285                         queue = atoi(optarg);
 286                         convert_time = 1;
 287                         convert_real = 1;
 288                         break;
 289                 case 't':
 290                         queue = atoi(optarg);
 291                         convert_time = 1;
 292                         convert_real = 0;
 293                         break;
 294                 case 'l':
 295                         command = LIST;
 296                         list_subs = 1;
 297                         break;
 298                 case 'x':
 299                         command = REMOVE_ALL;
 300                         break;
 301                 default:
 302                         usage();
 303                         exit(1);
 304                 }
 305         }
 306
 307         if (snd_seq_open(&seq, "default", SND_SEQ_OPEN_DUPLEX, 0) < 0) {
 308                 fprintf(stderr, _("can't open sequencer\n"));
 309                 return 1;
 310         }
 311
 312         snd_lib_error_set_handler(error_handler);
 313
 314         switch (command) {
 315         case LIST:
 316                 do_search_port(seq, list_perm,
 317                                list_subs ? print_port_and_subs : print_port);
 318                 snd_seq_close(seq);
 319                 return 0;
 320         case REMOVE_ALL:
 321                 remove_all_connections(seq);
 322                 snd_seq_close(seq);
 323                 return 0;
 324         }
 325
 326         /* connection or disconnection */
 327
 328         if (optind + 2 > argc) {
 329                 snd_seq_close(seq);
 330                 usage();
 331                 exit(1);
 332         }
 333
 334         if ((client = snd_seq_client_id(seq)) < 0) {
 335                 snd_seq_close(seq);
 336                 fprintf(stderr, _("can't get client id\n"));
 337                 return 1;
 338         }
 339
 340         /* set client info */
 341         if (snd_seq_set_client_name(seq, "ALSA Connector") < 0) {
 342                 snd_seq_close(seq);
 343                 fprintf(stderr, _("can't set client info\n"));
 344                 return 1;
 345         }
 346
 347         /* set subscription */
 348         if (snd_seq_parse_address(seq, &sender, argv[optind]) < 0) {
 349                 snd_seq_close(seq);
 350                 fprintf(stderr, _("invalid sender address %s\n"), argv[optind]);
 351                 return 1;
 352         }
 353         if (snd_seq_parse_address(seq, &dest, argv[optind + 1]) < 0) {
 354                 snd_seq_close(seq);
 355                 fprintf(stderr, _("invalid destination address %s\n"), argv[optind + 1]);
 356                 return 1;
 357         }
 358         snd_seq_port_subscribe_alloca(&subs);
 359         snd_seq_port_subscribe_set_sender(subs, &sender);
 360         snd_seq_port_subscribe_set_dest(subs, &dest);
 361         snd_seq_port_subscribe_set_queue(subs, queue);
 362         snd_seq_port_subscribe_set_exclusive(subs, exclusive);
 363         snd_seq_port_subscribe_set_time_update(subs, convert_time);
 364         snd_seq_port_subscribe_set_time_real(subs, convert_real);
 365
 366         if (command == UNSUBSCRIBE) {
 367                 if (snd_seq_get_port_subscription(seq, subs) < 0) {
 368                         snd_seq_close(seq);
 369                         fprintf(stderr, _("No subscription is found\n"));
 370                         return 1;
 371                 }
 372                 if (snd_seq_unsubscribe_port(seq, subs) < 0) {
 373                         snd_seq_close(seq);
 374                         fprintf(stderr, _("Disconnection failed (%s)\n"), snd_strerror(errno));
 375                         return 1;
 376                 }
 377         } else {
 378                 if (snd_seq_get_port_subscription(seq, subs) == 0) {
 379                         snd_seq_close(seq);
 380                         fprintf(stderr, _("Connection is already subscribed\n"));
 381                         return 1;
 382                 }
 383                 if (snd_seq_subscribe_port(seq, subs) < 0) {
 384                         snd_seq_close(seq);
 385                         fprintf(stderr, _("Connection failed (%s)\n"), snd_strerror(errno));
 386                         return 1;
 387                 }
 388         }
 389
 390         snd_seq_close(seq);
 391
 392         return 0;
 393 }