code.delx.au - pulseaudio/blob - src/utils/padsp.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as published
   8   by the Free Software Foundation; either version 2 of the License,
   9   or (at your option) any later version.
  10
  11   PulseAudio is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with PulseAudio; if not, write to the Free Software
  18   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  19   USA.
  20 ***/
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #ifdef _FILE_OFFSET_BITS
  27 #undef _FILE_OFFSET_BITS
  28 #endif
  29
  30 #ifndef _LARGEFILE64_SOURCE
  31 #define _LARGEFILE64_SOURCE 1
  32 #endif
  33
  34 #include <sys/soundcard.h>
  35 #include <sys/ioctl.h>
  36 #include <pthread.h>
  37 #include <unistd.h>
  38 #include <sys/socket.h>
  39 #include <sys/stat.h>
  40 #include <dlfcn.h>
  41 #include <errno.h>
  42 #include <fcntl.h>
  43 #include <string.h>
  44 #include <stdarg.h>
  45 #include <stdio.h>
  46 #include <signal.h>
  47
  48 #ifdef __linux__
  49 #include <linux/sockios.h>
  50 #endif
  51
  52 #include <pulse/pulseaudio.h>
  53 #include <pulsecore/llist.h>
  54 #include <pulsecore/gccmacro.h>
  55
  56 /* On some systems SIOCINQ isn't defined, but FIONREAD is just an alias */
  57 #if !defined(SIOCINQ) && defined(FIONREAD)
  58 # define SIOCINQ FIONREAD
  59 #endif
  60
  61 typedef enum {
  62     FD_INFO_MIXER,
  63     FD_INFO_STREAM,
  64 } fd_info_type_t;
  65
  66 typedef struct fd_info fd_info;
  67
  68 struct fd_info {
  69     pthread_mutex_t mutex;
  70     int ref;
  71     int unusable;
  72
  73     fd_info_type_t type;
  74     int app_fd, thread_fd;
  75
  76     pa_sample_spec sample_spec;
  77     size_t fragment_size;
  78     unsigned n_fragments;
  79
  80     pa_threaded_mainloop *mainloop;
  81     pa_context *context;
  82     pa_stream *play_stream;
  83     pa_stream *rec_stream;
  84
  85     pa_io_event *io_event;
  86     pa_io_event_flags_t io_flags;
  87
  88     void *buf;
  89     size_t rec_offset;
  90
  91     int operation_success;
  92
  93     pa_cvolume sink_volume, source_volume;
  94     uint32_t sink_index, source_index;
  95     int volume_modify_count;
  96
  97     PA_LLIST_FIELDS(fd_info);
  98 };
  99
 100 static int dsp_drain(fd_info *i);
 101 static void fd_info_remove_from_list(fd_info *i);
 102
 103 static pthread_mutex_t fd_infos_mutex = PTHREAD_MUTEX_INITIALIZER;
 104 static pthread_mutex_t func_mutex = PTHREAD_MUTEX_INITIALIZER;
 105
 106 static PA_LLIST_HEAD(fd_info, fd_infos) = NULL;
 107
 108 static int (*_ioctl)(int, int, void*) = NULL;
 109 static int (*_close)(int) = NULL;
 110 static int (*_open)(const char *, int, mode_t) = NULL;
 111 static FILE* (*_fopen)(const char *path, const char *mode) = NULL;
 112 #ifdef HAVE_OPEN64
 113 static int (*_open64)(const char *, int, mode_t) = NULL;
 114 static FILE* (*_fopen64)(const char *path, const char *mode) = NULL;
 115 #endif
 116 static int (*_fclose)(FILE *f) = NULL;
 117 static int (*_access)(const char *, int) = NULL;
 118
 119 /* dlsym() violates ISO C, so confide the breakage into this function to
 120  * avoid warnings. */
 121 typedef void (*fnptr)(void);
 122 static inline fnptr dlsym_fn(void *handle, const char *symbol) {
 123     return (fnptr) (long) dlsym(handle, symbol);
 124 }
 125
 126 #define LOAD_IOCTL_FUNC() \
 127 do { \
 128     pthread_mutex_lock(&func_mutex); \
 129     if (!_ioctl)  \
 130         _ioctl = (int (*)(int, int, void*)) dlsym_fn(RTLD_NEXT, "ioctl"); \
 131     pthread_mutex_unlock(&func_mutex); \
 132 } while(0)
 133
 134 #define LOAD_OPEN_FUNC() \
 135 do { \
 136     pthread_mutex_lock(&func_mutex); \
 137     if (!_open) \
 138         _open = (int (*)(const char *, int, mode_t)) dlsym_fn(RTLD_NEXT, "open"); \
 139     pthread_mutex_unlock(&func_mutex); \
 140 } while(0)
 141
 142 #define LOAD_OPEN64_FUNC() \
 143 do { \
 144     pthread_mutex_lock(&func_mutex); \
 145     if (!_open64) \
 146         _open64 = (int (*)(const char *, int, mode_t)) dlsym_fn(RTLD_NEXT, "open64"); \
 147     pthread_mutex_unlock(&func_mutex); \
 148 } while(0)
 149
 150 #define LOAD_CLOSE_FUNC() \
 151 do { \
 152     pthread_mutex_lock(&func_mutex); \
 153     if (!_close) \
 154         _close = (int (*)(int)) dlsym_fn(RTLD_NEXT, "close"); \
 155     pthread_mutex_unlock(&func_mutex); \
 156 } while(0)
 157
 158 #define LOAD_ACCESS_FUNC() \
 159 do { \
 160     pthread_mutex_lock(&func_mutex); \
 161     if (!_access) \
 162         _access = (int (*)(const char*, int)) dlsym_fn(RTLD_NEXT, "access"); \
 163     pthread_mutex_unlock(&func_mutex); \
 164 } while(0)
 165
 166 #define LOAD_FOPEN_FUNC() \
 167 do { \
 168     pthread_mutex_lock(&func_mutex); \
 169     if (!_fopen) \
 170         _fopen = (FILE* (*)(const char *, const char*)) dlsym_fn(RTLD_NEXT, "fopen"); \
 171     pthread_mutex_unlock(&func_mutex); \
 172 } while(0)
 173
 174 #define LOAD_FOPEN64_FUNC() \
 175 do { \
 176     pthread_mutex_lock(&func_mutex); \
 177     if (!_fopen64) \
 178         _fopen64 = (FILE* (*)(const char *, const char*)) dlsym_fn(RTLD_NEXT, "fopen64"); \
 179     pthread_mutex_unlock(&func_mutex); \
 180 } while(0)
 181
 182 #define LOAD_FCLOSE_FUNC() \
 183 do { \
 184     pthread_mutex_lock(&func_mutex); \
 185     if (!_fclose) \
 186         _fclose = (int (*)(FILE *)) dlsym_fn(RTLD_NEXT, "fclose"); \
 187     pthread_mutex_unlock(&func_mutex); \
 188 } while(0)
 189
 190 #define CONTEXT_CHECK_DEAD_GOTO(i, label) do { \
 191 if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY) { \
 192     debug(DEBUG_LEVEL_NORMAL, __FILE__": Not connected: %s", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
 193     goto label; \
 194 } \
 195 } while(0);
 196
 197 #define PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, label) do { \
 198 if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY || \
 199     !(i)->play_stream || pa_stream_get_state((i)->play_stream) != PA_STREAM_READY) { \
 200     debug(DEBUG_LEVEL_NORMAL, __FILE__": Not connected: %s", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
 201     goto label; \
 202 } \
 203 } while(0);
 204
 205 #define RECORD_STREAM_CHECK_DEAD_GOTO(i, label) do { \
 206 if (!(i)->context || pa_context_get_state((i)->context) != PA_CONTEXT_READY || \
 207     !(i)->rec_stream || pa_stream_get_state((i)->rec_stream) != PA_STREAM_READY) { \
 208     debug(DEBUG_LEVEL_NORMAL, __FILE__": Not connected: %s", (i)->context ? pa_strerror(pa_context_errno((i)->context)) : "NULL"); \
 209     goto label; \
 210 } \
 211 } while(0);
 212
 213 static void debug(int level, const char *format, ...) PA_GCC_PRINTF_ATTR(2,3);
 214
 215 #define DEBUG_LEVEL_ALWAYS              0
 216 #define DEBUG_LEVEL_NORMAL              1
 217 #define DEBUG_LEVEL_VERBOSE             2
 218
 219 static void debug(int level, const char *format, ...) {
 220     va_list ap;
 221     const char *dlevel_s;
 222     int dlevel;
 223
 224     dlevel_s = getenv("PADSP_DEBUG");
 225     if (!dlevel_s)
 226         return;
 227
 228     dlevel = atoi(dlevel_s);
 229
 230     if (dlevel < level)
 231         return;
 232
 233     va_start(ap, format);
 234     vfprintf(stderr, format, ap);
 235     va_end(ap);
 236 }
 237
 238 static int padsp_disabled(void) {
 239     static int *sym;
 240     static int sym_resolved = 0;
 241
 242     /* If the current process has a symbol __padsp_disabled__ we use
 243      * it to detect whether we should enable our stuff or not. A
 244      * program needs to be compiled with -rdynamic for this to work!
 245      * The symbol must be an int containing a three bit bitmask: bit 1
 246      * -> disable /dev/dsp emulation, bit 2 -> disable /dev/sndstat
 247      * emulation, bit 3 -> disable /dev/mixer emulation. Hence a value
 248      * of 7 disables padsp entirely. */
 249
 250     pthread_mutex_lock(&func_mutex);
 251     if (!sym_resolved) {
 252         sym = (int*) dlsym(RTLD_DEFAULT, "__padsp_disabled__");
 253         sym_resolved = 1;
 254
 255     }
 256     pthread_mutex_unlock(&func_mutex);
 257
 258     if (!sym)
 259         return 0;
 260
 261     return *sym;
 262 }
 263
 264 static int dsp_cloak_enable(void) {
 265     if (padsp_disabled() & 1)
 266         return 0;
 267
 268     if (getenv("PADSP_NO_DSP"))
 269         return 0;
 270
 271     return 1;
 272 }
 273
 274 static int sndstat_cloak_enable(void) {
 275     if (padsp_disabled() & 2)
 276         return 0;
 277
 278     if (getenv("PADSP_NO_SNDSTAT"))
 279         return 0;
 280
 281     return 1;
 282 }
 283
 284 static int mixer_cloak_enable(void) {
 285     if (padsp_disabled() & 4)
 286         return 0;
 287
 288     if (getenv("PADSP_NO_MIXER"))
 289         return 0;
 290
 291     return 1;
 292 }
 293 static pthread_key_t recursion_key;
 294
 295 static void recursion_key_alloc(void) {
 296     pthread_key_create(&recursion_key, NULL);
 297 }
 298
 299 static int function_enter(void) {
 300     /* Avoid recursive calls */
 301     static pthread_once_t recursion_key_once = PTHREAD_ONCE_INIT;
 302     pthread_once(&recursion_key_once, recursion_key_alloc);
 303
 304     if (pthread_getspecific(recursion_key))
 305         return 0;
 306
 307     pthread_setspecific(recursion_key, (void*) 1);
 308     return 1;
 309 }
 310
 311 static void function_exit(void) {
 312     pthread_setspecific(recursion_key, NULL);
 313 }
 314
 315 static void fd_info_free(fd_info *i) {
 316     assert(i);
 317
 318     debug(DEBUG_LEVEL_NORMAL, __FILE__": freeing fd info (fd=%i)\n", i->app_fd);
 319
 320     dsp_drain(i);
 321
 322     if (i->mainloop)
 323         pa_threaded_mainloop_stop(i->mainloop);
 324
 325     if (i->play_stream) {
 326         pa_stream_disconnect(i->play_stream);
 327         pa_stream_unref(i->play_stream);
 328     }
 329
 330     if (i->rec_stream) {
 331         pa_stream_disconnect(i->rec_stream);
 332         pa_stream_unref(i->rec_stream);
 333     }
 334
 335     if (i->context) {
 336         pa_context_disconnect(i->context);
 337         pa_context_unref(i->context);
 338     }
 339
 340     if (i->mainloop)
 341         pa_threaded_mainloop_free(i->mainloop);
 342
 343     if (i->app_fd >= 0) {
 344         LOAD_CLOSE_FUNC();
 345         _close(i->app_fd);
 346     }
 347
 348     if (i->thread_fd >= 0) {
 349         LOAD_CLOSE_FUNC();
 350         _close(i->thread_fd);
 351     }
 352
 353     free(i->buf);
 354
 355     pthread_mutex_destroy(&i->mutex);
 356     free(i);
 357 }
 358
 359 static fd_info *fd_info_ref(fd_info *i) {
 360     assert(i);
 361
 362     pthread_mutex_lock(&i->mutex);
 363     assert(i->ref >= 1);
 364     i->ref++;
 365
 366     debug(DEBUG_LEVEL_VERBOSE, __FILE__": ref++, now %i\n", i->ref);
 367     pthread_mutex_unlock(&i->mutex);
 368
 369     return i;
 370 }
 371
 372 static void fd_info_unref(fd_info *i) {
 373     int r;
 374     pthread_mutex_lock(&i->mutex);
 375     assert(i->ref >= 1);
 376     r = --i->ref;
 377         debug(DEBUG_LEVEL_VERBOSE, __FILE__": ref--, now %i\n", i->ref);
 378     pthread_mutex_unlock(&i->mutex);
 379
 380     if (r <= 0)
 381         fd_info_free(i);
 382 }
 383
 384 static void context_state_cb(pa_context *c, void *userdata) {
 385     fd_info *i = userdata;
 386     assert(c);
 387
 388     switch (pa_context_get_state(c)) {
 389         case PA_CONTEXT_READY:
 390         case PA_CONTEXT_TERMINATED:
 391         case PA_CONTEXT_FAILED:
 392             pa_threaded_mainloop_signal(i->mainloop, 0);
 393             break;
 394
 395         case PA_CONTEXT_UNCONNECTED:
 396         case PA_CONTEXT_CONNECTING:
 397         case PA_CONTEXT_AUTHORIZING:
 398         case PA_CONTEXT_SETTING_NAME:
 399             break;
 400     }
 401 }
 402
 403 static void reset_params(fd_info *i) {
 404     assert(i);
 405
 406     i->sample_spec.format = PA_SAMPLE_U8;
 407     i->sample_spec.channels = 1;
 408     i->sample_spec.rate = 8000;
 409     i->fragment_size = 0;
 410     i->n_fragments = 0;
 411 }
 412
 413 static const char *client_name(char *buf, size_t n) {
 414     char p[PATH_MAX];
 415     const char *e;
 416
 417     if ((e = getenv("PADSP_CLIENT_NAME")))
 418         return e;
 419
 420     if (pa_get_binary_name(p, sizeof(p)))
 421         snprintf(buf, n, "OSS Emulation[%s]", p);
 422     else
 423         snprintf(buf, n, "OSS");
 424
 425     return buf;
 426 }
 427
 428 static const char *stream_name(void) {
 429     const char *e;
 430
 431     if ((e = getenv("PADSP_STREAM_NAME")))
 432         return e;
 433
 434     return "Audio Stream";
 435 }
 436
 437 static void atfork_prepare(void) {
 438     fd_info *i;
 439
 440     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_prepare() enter\n");
 441
 442     function_enter();
 443
 444     pthread_mutex_lock(&fd_infos_mutex);
 445
 446     for (i = fd_infos; i; i = i->next) {
 447         pthread_mutex_lock(&i->mutex);
 448         pa_threaded_mainloop_lock(i->mainloop);
 449     }
 450
 451     pthread_mutex_lock(&func_mutex);
 452
 453
 454     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_prepare() exit\n");
 455 }
 456
 457 static void atfork_parent(void) {
 458     fd_info *i;
 459
 460     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_parent() enter\n");
 461
 462     pthread_mutex_unlock(&func_mutex);
 463
 464     for (i = fd_infos; i; i = i->next) {
 465         pa_threaded_mainloop_unlock(i->mainloop);
 466         pthread_mutex_unlock(&i->mutex);
 467     }
 468
 469     pthread_mutex_unlock(&fd_infos_mutex);
 470
 471     function_exit();
 472
 473     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_parent() exit\n");
 474 }
 475
 476 static void atfork_child(void) {
 477     fd_info *i;
 478
 479     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_child() enter\n");
 480
 481     /* We do only the bare minimum to get all fds closed */
 482     pthread_mutex_init(&func_mutex, NULL);
 483     pthread_mutex_init(&fd_infos_mutex, NULL);
 484
 485     for (i = fd_infos; i; i = i->next) {
 486         pthread_mutex_init(&i->mutex, NULL);
 487
 488         if (i->context) {
 489             pa_context_disconnect(i->context);
 490             pa_context_unref(i->context);
 491             i->context = NULL;
 492         }
 493
 494         if (i->play_stream) {
 495             pa_stream_unref(i->play_stream);
 496             i->play_stream = NULL;
 497         }
 498
 499         if (i->rec_stream) {
 500             pa_stream_unref(i->rec_stream);
 501             i->rec_stream = NULL;
 502         }
 503
 504         if (i->app_fd >= 0) {
 505             close(i->app_fd);
 506             i->app_fd = -1;
 507         }
 508
 509         if (i->thread_fd >= 0) {
 510             close(i->thread_fd);
 511             i->thread_fd = -1;
 512         }
 513
 514         i->unusable = 1;
 515     }
 516
 517     function_exit();
 518
 519     debug(DEBUG_LEVEL_NORMAL, __FILE__": atfork_child() exit\n");
 520 }
 521
 522 static void install_atfork(void) {
 523     pthread_atfork(atfork_prepare, atfork_parent, atfork_child);
 524 }
 525
 526 static void stream_success_cb(pa_stream *s, int success, void *userdata) {
 527     fd_info *i = userdata;
 528
 529     assert(s);
 530     assert(i);
 531
 532     i->operation_success = success;
 533     pa_threaded_mainloop_signal(i->mainloop, 0);
 534 }
 535
 536 static void context_success_cb(pa_context *c, int success, void *userdata) {
 537     fd_info *i = userdata;
 538
 539     assert(c);
 540     assert(i);
 541
 542     i->operation_success = success;
 543     pa_threaded_mainloop_signal(i->mainloop, 0);
 544 }
 545
 546 static fd_info* fd_info_new(fd_info_type_t type, int *_errno) {
 547     fd_info *i;
 548     int sfds[2] = { -1, -1 };
 549     char name[64];
 550     static pthread_once_t install_atfork_once = PTHREAD_ONCE_INIT;
 551
 552     debug(DEBUG_LEVEL_NORMAL, __FILE__": fd_info_new()\n");
 553
 554     signal(SIGPIPE, SIG_IGN); /* Yes, ugly as hell */
 555
 556     pthread_once(&install_atfork_once, install_atfork);
 557
 558     if (!(i = malloc(sizeof(fd_info)))) {
 559         *_errno = ENOMEM;
 560         goto fail;
 561     }
 562
 563     i->app_fd = i->thread_fd = -1;
 564     i->type = type;
 565
 566     i->mainloop = NULL;
 567     i->context = NULL;
 568     i->play_stream = NULL;
 569     i->rec_stream = NULL;
 570     i->io_event = NULL;
 571     i->io_flags = 0;
 572     pthread_mutex_init(&i->mutex, NULL);
 573     i->ref = 1;
 574     i->buf = NULL;
 575     i->rec_offset = 0;
 576     i->unusable = 0;
 577     pa_cvolume_reset(&i->sink_volume, 2);
 578     pa_cvolume_reset(&i->source_volume, 2);
 579     i->volume_modify_count = 0;
 580     i->sink_index = (uint32_t) -1;
 581     i->source_index = (uint32_t) -1;
 582     PA_LLIST_INIT(fd_info, i);
 583
 584     reset_params(i);
 585
 586     if (socketpair(AF_UNIX, SOCK_STREAM, 0, sfds) < 0) {
 587         *_errno = errno;
 588         debug(DEBUG_LEVEL_NORMAL, __FILE__": socket() failed: %s\n", strerror(errno));
 589         goto fail;
 590     }
 591
 592     i->app_fd = sfds[0];
 593     i->thread_fd = sfds[1];
 594
 595     if (!(i->mainloop = pa_threaded_mainloop_new())) {
 596         *_errno = EIO;
 597         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_threaded_mainloop_new() failed\n");
 598         goto fail;
 599     }
 600
 601     if (!(i->context = pa_context_new(pa_threaded_mainloop_get_api(i->mainloop), client_name(name, sizeof(name))))) {
 602         *_errno = EIO;
 603         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_context_new() failed\n");
 604         goto fail;
 605     }
 606
 607     pa_context_set_state_callback(i->context, context_state_cb, i);
 608
 609     if (pa_context_connect(i->context, NULL, 0, NULL) < 0) {
 610         *_errno = ECONNREFUSED;
 611         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_context_connect() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 612         goto fail;
 613     }
 614
 615     pa_threaded_mainloop_lock(i->mainloop);
 616
 617     if (pa_threaded_mainloop_start(i->mainloop) < 0) {
 618         *_errno = EIO;
 619         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_threaded_mainloop_start() failed\n");
 620         goto unlock_and_fail;
 621     }
 622
 623     /* Wait until the context is ready */
 624     pa_threaded_mainloop_wait(i->mainloop);
 625
 626     if (pa_context_get_state(i->context) != PA_CONTEXT_READY) {
 627         *_errno = ECONNREFUSED;
 628         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_context_connect() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 629         goto unlock_and_fail;
 630     }
 631
 632     pa_threaded_mainloop_unlock(i->mainloop);
 633     return i;
 634
 635 unlock_and_fail:
 636
 637     pa_threaded_mainloop_unlock(i->mainloop);
 638
 639 fail:
 640
 641     if (i)
 642         fd_info_unref(i);
 643
 644     return NULL;
 645 }
 646
 647 static void fd_info_add_to_list(fd_info *i) {
 648     assert(i);
 649
 650     pthread_mutex_lock(&fd_infos_mutex);
 651     PA_LLIST_PREPEND(fd_info, fd_infos, i);
 652     pthread_mutex_unlock(&fd_infos_mutex);
 653
 654     fd_info_ref(i);
 655 }
 656
 657 static void fd_info_remove_from_list(fd_info *i) {
 658     assert(i);
 659
 660     pthread_mutex_lock(&fd_infos_mutex);
 661     PA_LLIST_REMOVE(fd_info, fd_infos, i);
 662     pthread_mutex_unlock(&fd_infos_mutex);
 663
 664     fd_info_unref(i);
 665 }
 666
 667 static fd_info* fd_info_find(int fd) {
 668     fd_info *i;
 669
 670     pthread_mutex_lock(&fd_infos_mutex);
 671
 672     for (i = fd_infos; i; i = i->next)
 673         if (i->app_fd == fd && !i->unusable) {
 674             fd_info_ref(i);
 675             break;
 676         }
 677
 678     pthread_mutex_unlock(&fd_infos_mutex);
 679
 680     return i;
 681 }
 682
 683 static void fix_metrics(fd_info *i) {
 684     size_t fs;
 685     char t[PA_SAMPLE_SPEC_SNPRINT_MAX];
 686
 687     fs = pa_frame_size(&i->sample_spec);
 688
 689     /* Don't fix things more than necessary */
 690     if ((i->fragment_size % fs) == 0 &&
 691         i->n_fragments >= 2 &&
 692         i->fragment_size > 0)
 693         return;
 694
 695     i->fragment_size = (i->fragment_size/fs)*fs;
 696
 697     /* Number of fragments set? */
 698     if (i->n_fragments < 2) {
 699         if (i->fragment_size > 0) {
 700             i->n_fragments = pa_bytes_per_second(&i->sample_spec) / 2 / i->fragment_size;
 701             if (i->n_fragments < 2)
 702                 i->n_fragments = 2;
 703         } else
 704             i->n_fragments = 12;
 705     }
 706
 707     /* Fragment size set? */
 708     if (i->fragment_size <= 0) {
 709         i->fragment_size = pa_bytes_per_second(&i->sample_spec) / 2 / i->n_fragments;
 710         if (i->fragment_size < 1024)
 711             i->fragment_size = 1024;
 712     }
 713
 714     debug(DEBUG_LEVEL_NORMAL, __FILE__": sample spec: %s\n", pa_sample_spec_snprint(t, sizeof(t), &i->sample_spec));
 715     debug(DEBUG_LEVEL_NORMAL, __FILE__": fixated metrics to %i fragments, %li bytes each.\n", i->n_fragments, (long)i->fragment_size);
 716 }
 717
 718 static void stream_request_cb(pa_stream *s, size_t length, void *userdata) {
 719     fd_info *i = userdata;
 720     assert(s);
 721
 722     if (i->io_event) {
 723         pa_mainloop_api *api;
 724         size_t n;
 725
 726         api = pa_threaded_mainloop_get_api(i->mainloop);
 727
 728         if (s == i->play_stream) {
 729             n = pa_stream_writable_size(i->play_stream);
 730             if (n == (size_t)-1) {
 731                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_writable_size(): %s\n",
 732                     pa_strerror(pa_context_errno(i->context)));
 733             }
 734
 735             if (n >= i->fragment_size)
 736                 i->io_flags |= PA_IO_EVENT_INPUT;
 737             else
 738                 i->io_flags &= ~PA_IO_EVENT_INPUT;
 739         }
 740
 741         if (s == i->rec_stream) {
 742             n = pa_stream_readable_size(i->rec_stream);
 743             if (n == (size_t)-1) {
 744                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_readable_size(): %s\n",
 745                     pa_strerror(pa_context_errno(i->context)));
 746             }
 747
 748             if (n >= i->fragment_size)
 749                 i->io_flags |= PA_IO_EVENT_OUTPUT;
 750             else
 751                 i->io_flags &= ~PA_IO_EVENT_OUTPUT;
 752         }
 753
 754         api->io_enable(i->io_event, i->io_flags);
 755     }
 756 }
 757
 758 static void stream_latency_update_cb(pa_stream *s, void *userdata) {
 759     fd_info *i = userdata;
 760     assert(s);
 761
 762     pa_threaded_mainloop_signal(i->mainloop, 0);
 763 }
 764
 765 static void fd_info_shutdown(fd_info *i) {
 766     assert(i);
 767
 768     if (i->io_event) {
 769         pa_mainloop_api *api;
 770         api = pa_threaded_mainloop_get_api(i->mainloop);
 771         api->io_free(i->io_event);
 772         i->io_event = NULL;
 773         i->io_flags = 0;
 774     }
 775
 776     if (i->thread_fd >= 0) {
 777         close(i->thread_fd);
 778         i->thread_fd = -1;
 779     }
 780 }
 781
 782 static int fd_info_copy_data(fd_info *i, int force) {
 783     size_t n;
 784
 785     if (!i->play_stream && !i->rec_stream)
 786         return -1;
 787
 788     if ((i->play_stream) && (pa_stream_get_state(i->play_stream) == PA_STREAM_READY)) {
 789         n = pa_stream_writable_size(i->play_stream);
 790
 791         if (n == (size_t)-1) {
 792             debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_writable_size(): %s\n",
 793                 pa_strerror(pa_context_errno(i->context)));
 794             return -1;
 795         }
 796
 797         while (n >= i->fragment_size || force) {
 798             ssize_t r;
 799
 800             if (!i->buf) {
 801                 if (!(i->buf = malloc(i->fragment_size))) {
 802                     debug(DEBUG_LEVEL_NORMAL, __FILE__": malloc() failed.\n");
 803                     return -1;
 804                 }
 805             }
 806
 807             if ((r = read(i->thread_fd, i->buf, i->fragment_size)) <= 0) {
 808
 809                 if (errno == EAGAIN)
 810                     break;
 811
 812                 debug(DEBUG_LEVEL_NORMAL, __FILE__": read(): %s\n", r == 0 ? "EOF" : strerror(errno));
 813                 return -1;
 814             }
 815
 816             if (pa_stream_write(i->play_stream, i->buf, r, free, 0, PA_SEEK_RELATIVE) < 0) {
 817                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_write(): %s\n", pa_strerror(pa_context_errno(i->context)));
 818                 return -1;
 819             }
 820
 821             i->buf = NULL;
 822
 823             assert(n >= (size_t) r);
 824             n -= r;
 825         }
 826
 827         if (n >= i->fragment_size)
 828             i->io_flags |= PA_IO_EVENT_INPUT;
 829         else
 830             i->io_flags &= ~PA_IO_EVENT_INPUT;
 831     }
 832
 833     if ((i->rec_stream) && (pa_stream_get_state(i->rec_stream) == PA_STREAM_READY)) {
 834         n = pa_stream_readable_size(i->rec_stream);
 835
 836         if (n == (size_t)-1) {
 837             debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_readable_size(): %s\n",
 838                 pa_strerror(pa_context_errno(i->context)));
 839             return -1;
 840         }
 841
 842         while (n >= i->fragment_size || force) {
 843             ssize_t r;
 844             const void *data;
 845             const char *buf;
 846             size_t len;
 847
 848             if (pa_stream_peek(i->rec_stream, &data, &len) < 0) {
 849                 debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_peek(): %s\n", pa_strerror(pa_context_errno(i->context)));
 850                 return -1;
 851             }
 852
 853             if (!data)
 854                 break;
 855
 856             buf = (const char*)data + i->rec_offset;
 857
 858             if ((r = write(i->thread_fd, buf, len - i->rec_offset)) <= 0) {
 859
 860                 if (errno == EAGAIN)
 861                     break;
 862
 863                 debug(DEBUG_LEVEL_NORMAL, __FILE__": write(): %s\n", strerror(errno));
 864                 return -1;
 865             }
 866
 867             assert((size_t)r <= len - i->rec_offset);
 868             i->rec_offset += r;
 869
 870             if (i->rec_offset == len) {
 871                 if (pa_stream_drop(i->rec_stream) < 0) {
 872                     debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drop(): %s\n", pa_strerror(pa_context_errno(i->context)));
 873                     return -1;
 874                 }
 875                 i->rec_offset = 0;
 876             }
 877
 878             assert(n >= (size_t) r);
 879             n -= r;
 880         }
 881
 882         if (n >= i->fragment_size)
 883             i->io_flags |= PA_IO_EVENT_OUTPUT;
 884         else
 885             i->io_flags &= ~PA_IO_EVENT_OUTPUT;
 886     }
 887
 888     if (i->io_event) {
 889         pa_mainloop_api *api;
 890
 891         api = pa_threaded_mainloop_get_api(i->mainloop);
 892         api->io_enable(i->io_event, i->io_flags);
 893     }
 894
 895     return 0;
 896 }
 897
 898 static void stream_state_cb(pa_stream *s, void * userdata) {
 899     fd_info *i = userdata;
 900     assert(s);
 901
 902     switch (pa_stream_get_state(s)) {
 903
 904         case PA_STREAM_READY:
 905             debug(DEBUG_LEVEL_NORMAL, __FILE__": stream established.\n");
 906             break;
 907
 908         case PA_STREAM_FAILED:
 909             debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 910             fd_info_shutdown(i);
 911             break;
 912
 913         case PA_STREAM_TERMINATED:
 914         case PA_STREAM_UNCONNECTED:
 915         case PA_STREAM_CREATING:
 916             break;
 917     }
 918 }
 919
 920 static int create_playback_stream(fd_info *i) {
 921     pa_buffer_attr attr;
 922     int n;
 923
 924     assert(i);
 925
 926     fix_metrics(i);
 927
 928     if (!(i->play_stream = pa_stream_new(i->context, stream_name(), &i->sample_spec, NULL))) {
 929         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 930         goto fail;
 931     }
 932
 933     pa_stream_set_state_callback(i->play_stream, stream_state_cb, i);
 934     pa_stream_set_write_callback(i->play_stream, stream_request_cb, i);
 935     pa_stream_set_latency_update_callback(i->play_stream, stream_latency_update_cb, i);
 936
 937     memset(&attr, 0, sizeof(attr));
 938     attr.maxlength = i->fragment_size * (i->n_fragments+1);
 939     attr.tlength = i->fragment_size * i->n_fragments;
 940     attr.prebuf = i->fragment_size;
 941     attr.minreq = i->fragment_size;
 942
 943     if (pa_stream_connect_playback(i->play_stream, NULL, &attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE, NULL, NULL) < 0) {
 944         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 945         goto fail;
 946     }
 947
 948     n = i->fragment_size;
 949     setsockopt(i->app_fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n));
 950     n = i->fragment_size;
 951     setsockopt(i->thread_fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n));
 952
 953     return 0;
 954
 955 fail:
 956     return -1;
 957 }
 958
 959 static int create_record_stream(fd_info *i) {
 960     pa_buffer_attr attr;
 961     int n;
 962
 963     assert(i);
 964
 965     fix_metrics(i);
 966
 967     if (!(i->rec_stream = pa_stream_new(i->context, stream_name(), &i->sample_spec, NULL))) {
 968         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_new() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 969         goto fail;
 970     }
 971
 972     pa_stream_set_state_callback(i->rec_stream, stream_state_cb, i);
 973     pa_stream_set_read_callback(i->rec_stream, stream_request_cb, i);
 974     pa_stream_set_latency_update_callback(i->rec_stream, stream_latency_update_cb, i);
 975
 976     memset(&attr, 0, sizeof(attr));
 977     attr.maxlength = i->fragment_size * (i->n_fragments+1);
 978     attr.fragsize = i->fragment_size;
 979
 980     if (pa_stream_connect_record(i->rec_stream, NULL, &attr, PA_STREAM_INTERPOLATE_TIMING|PA_STREAM_AUTO_TIMING_UPDATE) < 0) {
 981         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_connect_playback() failed: %s\n", pa_strerror(pa_context_errno(i->context)));
 982         goto fail;
 983     }
 984
 985     n = i->fragment_size;
 986     setsockopt(i->app_fd, SOL_SOCKET, SO_RCVBUF, &n, sizeof(n));
 987     n = i->fragment_size;
 988     setsockopt(i->thread_fd, SOL_SOCKET, SO_SNDBUF, &n, sizeof(n));
 989
 990     return 0;
 991
 992 fail:
 993     return -1;
 994 }
 995
 996 static void free_streams(fd_info *i) {
 997     assert(i);
 998
 999     if (i->play_stream) {
1000         pa_stream_disconnect(i->play_stream);
1001         pa_stream_unref(i->play_stream);
1002         i->play_stream = NULL;
1003     }
1004
1005     if (i->rec_stream) {
1006         pa_stream_disconnect(i->rec_stream);
1007         pa_stream_unref(i->rec_stream);
1008         i->rec_stream = NULL;
1009     }
1010 }
1011
1012 static void io_event_cb(pa_mainloop_api *api, pa_io_event *e, int fd, pa_io_event_flags_t flags, void *userdata) {
1013     fd_info *i = userdata;
1014
1015     pa_threaded_mainloop_signal(i->mainloop, 0);
1016
1017     if (flags & PA_IO_EVENT_INPUT) {
1018
1019         if (!i->play_stream) {
1020             if (create_playback_stream(i) < 0)
1021                 goto fail;
1022         } else {
1023             if (fd_info_copy_data(i, 0) < 0)
1024                 goto fail;
1025         }
1026
1027     } else if (flags & PA_IO_EVENT_OUTPUT) {
1028
1029         if (!i->rec_stream) {
1030             if (create_record_stream(i) < 0)
1031                 goto fail;
1032         } else {
1033             if (fd_info_copy_data(i, 0) < 0)
1034                 goto fail;
1035         }
1036
1037     } else if (flags & (PA_IO_EVENT_HANGUP|PA_IO_EVENT_ERROR))
1038         goto fail;
1039
1040     return;
1041
1042 fail:
1043     /* We can't do anything better than removing the event source */
1044     fd_info_shutdown(i);
1045 }
1046
1047 static int dsp_open(int flags, int *_errno) {
1048     fd_info *i;
1049     pa_mainloop_api *api;
1050     int ret;
1051     int f;
1052
1053     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open()\n");
1054
1055     if (!(i = fd_info_new(FD_INFO_STREAM, _errno)))
1056         return -1;
1057
1058     if ((flags & O_NONBLOCK) == O_NONBLOCK) {
1059         if ((f = fcntl(i->app_fd, F_GETFL)) >= 0)
1060             fcntl(i->app_fd, F_SETFL, f|O_NONBLOCK);
1061     }
1062     if ((f = fcntl(i->thread_fd, F_GETFL)) >= 0)
1063         fcntl(i->thread_fd, F_SETFL, f|O_NONBLOCK);
1064
1065     fcntl(i->app_fd, F_SETFD, FD_CLOEXEC);
1066     fcntl(i->thread_fd, F_SETFD, FD_CLOEXEC);
1067
1068     pa_threaded_mainloop_lock(i->mainloop);
1069     api = pa_threaded_mainloop_get_api(i->mainloop);
1070
1071     switch (flags & O_ACCMODE) {
1072     case O_RDONLY:
1073         i->io_flags = PA_IO_EVENT_OUTPUT;
1074         shutdown(i->thread_fd, SHUT_RD);
1075         shutdown(i->app_fd, SHUT_WR);
1076         break;
1077     case O_WRONLY:
1078         i->io_flags = PA_IO_EVENT_INPUT;
1079         shutdown(i->thread_fd, SHUT_WR);
1080         shutdown(i->app_fd, SHUT_RD);
1081         break;
1082     case O_RDWR:
1083         i->io_flags = PA_IO_EVENT_INPUT | PA_IO_EVENT_OUTPUT;
1084         break;
1085     default:
1086         return -1;
1087     }
1088
1089     if (!(i->io_event = api->io_new(api, i->thread_fd, i->io_flags, io_event_cb, i)))
1090         goto fail;
1091
1092     pa_threaded_mainloop_unlock(i->mainloop);
1093
1094     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open() succeeded, fd=%i\n", i->app_fd);
1095
1096     fd_info_add_to_list(i);
1097     ret = i->app_fd;
1098     fd_info_unref(i);
1099
1100     return ret;
1101
1102 fail:
1103     pa_threaded_mainloop_unlock(i->mainloop);
1104
1105     if (i)
1106         fd_info_unref(i);
1107
1108     *_errno = EIO;
1109
1110     debug(DEBUG_LEVEL_NORMAL, __FILE__": dsp_open() failed\n");
1111
1112     return -1;
1113 }
1114
1115 static void sink_info_cb(pa_context *context, const pa_sink_info *si, int eol, void *userdata) {
1116     fd_info *i = userdata;
1117
1118     if (!si && eol < 0) {
1119         i->operation_success = 0;
1120         pa_threaded_mainloop_signal(i->mainloop, 0);
1121         return;
1122     }
1123
1124     if (eol)
1125         return;
1126
1127     if (!pa_cvolume_equal(&i->sink_volume, &si->volume))
1128         i->volume_modify_count++;
1129
1130     i->sink_volume = si->volume;
1131     i->sink_index = si->index;
1132
1133     i->operation_success = 1;
1134     pa_threaded_mainloop_signal(i->mainloop, 0);
1135 }
1136
1137 static void source_info_cb(pa_context *context, const pa_source_info *si, int eol, void *userdata) {
1138     fd_info *i = userdata;
1139
1140     if (!si && eol < 0) {
1141         i->operation_success = 0;
1142         pa_threaded_mainloop_signal(i->mainloop, 0);
1143         return;
1144     }
1145
1146     if (eol)
1147         return;
1148
1149     if (!pa_cvolume_equal(&i->source_volume, &si->volume))
1150         i->volume_modify_count++;
1151
1152     i->source_volume = si->volume;
1153     i->source_index = si->index;
1154
1155     i->operation_success = 1;
1156     pa_threaded_mainloop_signal(i->mainloop, 0);
1157 }
1158
1159 static void subscribe_cb(pa_context *context, pa_subscription_event_type_t t, uint32_t idx, void *userdata) {
1160     fd_info *i = userdata;
1161     pa_operation *o = NULL;
1162
1163     if (i->sink_index != idx)
1164         return;
1165
1166     if ((t & PA_SUBSCRIPTION_EVENT_TYPE_MASK) != PA_SUBSCRIPTION_EVENT_CHANGE)
1167         return;
1168
1169     if (!(o = pa_context_get_sink_info_by_index(i->context, i->sink_index, sink_info_cb, i))) {
1170         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1171         return;
1172     }
1173
1174     pa_operation_unref(o);
1175 }
1176
1177 static int mixer_open(int flags, int *_errno) {
1178     fd_info *i;
1179     pa_operation *o = NULL;
1180     int ret;
1181
1182     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open()\n");
1183
1184     if (!(i = fd_info_new(FD_INFO_MIXER, _errno)))
1185         return -1;
1186
1187     pa_threaded_mainloop_lock(i->mainloop);
1188
1189     pa_context_set_subscribe_callback(i->context, subscribe_cb, i);
1190
1191     if (!(o = pa_context_subscribe(i->context, PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SOURCE, context_success_cb, i))) {
1192         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
1193         *_errno = EIO;
1194         goto fail;
1195     }
1196
1197     i->operation_success = 0;
1198     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1199         pa_threaded_mainloop_wait(i->mainloop);
1200         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1201     }
1202
1203     pa_operation_unref(o);
1204     o = NULL;
1205
1206     if (!i->operation_success) {
1207         debug(DEBUG_LEVEL_NORMAL, __FILE__":Failed to subscribe to events: %s", pa_strerror(pa_context_errno(i->context)));
1208         *_errno = EIO;
1209         goto fail;
1210     }
1211
1212     /* Get sink info */
1213
1214     if (!(o = pa_context_get_sink_info_by_name(i->context, NULL, sink_info_cb, i))) {
1215         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1216         *_errno = EIO;
1217         goto fail;
1218     }
1219
1220     i->operation_success = 0;
1221     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1222         pa_threaded_mainloop_wait(i->mainloop);
1223         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1224     }
1225
1226     pa_operation_unref(o);
1227     o = NULL;
1228
1229     if (!i->operation_success) {
1230         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get sink info: %s", pa_strerror(pa_context_errno(i->context)));
1231         *_errno = EIO;
1232         goto fail;
1233     }
1234
1235     /* Get source info */
1236
1237     if (!(o = pa_context_get_source_info_by_name(i->context, NULL, source_info_cb, i))) {
1238         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get source info: %s", pa_strerror(pa_context_errno(i->context)));
1239         *_errno = EIO;
1240         goto fail;
1241     }
1242
1243     i->operation_success = 0;
1244     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1245         pa_threaded_mainloop_wait(i->mainloop);
1246         CONTEXT_CHECK_DEAD_GOTO(i, fail);
1247     }
1248
1249     pa_operation_unref(o);
1250     o = NULL;
1251
1252     if (!i->operation_success) {
1253         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to get source info: %s", pa_strerror(pa_context_errno(i->context)));
1254         *_errno = EIO;
1255         goto fail;
1256     }
1257
1258     pa_threaded_mainloop_unlock(i->mainloop);
1259
1260     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open() succeeded, fd=%i\n", i->app_fd);
1261
1262     fd_info_add_to_list(i);
1263     ret = i->app_fd;
1264     fd_info_unref(i);
1265
1266     return ret;
1267
1268 fail:
1269     if (o)
1270         pa_operation_unref(o);
1271
1272     pa_threaded_mainloop_unlock(i->mainloop);
1273
1274     if (i)
1275         fd_info_unref(i);
1276
1277     *_errno = EIO;
1278
1279     debug(DEBUG_LEVEL_NORMAL, __FILE__": mixer_open() failed\n");
1280
1281     return -1;
1282 }
1283
1284 static int sndstat_open(int flags, int *_errno) {
1285     static const char sndstat[] =
1286         "Sound Driver:3.8.1a-980706 (PulseAudio Virtual OSS)\n"
1287         "Kernel: POSIX\n"
1288         "Config options: 0\n"
1289         "\n"
1290         "Installed drivers:\n"
1291         "Type 255: PulseAudio Virtual OSS\n"
1292         "\n"
1293         "Card config:\n"
1294         "PulseAudio Virtual OSS\n"
1295         "\n"
1296         "Audio devices:\n"
1297         "0: PulseAudio Virtual OSS\n"
1298         "\n"
1299         "Synth devices: NOT ENABLED IN CONFIG\n"
1300         "\n"
1301         "Midi devices:\n"
1302         "\n"
1303         "Timers:\n"
1304         "\n"
1305         "Mixers:\n"
1306         "0: PulseAudio Virtual OSS\n";
1307
1308     char fn[] = "/tmp/padsp-sndstat-XXXXXX";
1309     mode_t u;
1310     int fd = -1;
1311     int e;
1312
1313     debug(DEBUG_LEVEL_NORMAL, __FILE__": sndstat_open()\n");
1314
1315     if (flags != O_RDONLY
1316 #ifdef O_LARGEFILE
1317         && flags != (O_RDONLY|O_LARGEFILE)
1318 #endif
1319        ) {
1320         *_errno = EACCES;
1321         debug(DEBUG_LEVEL_NORMAL, __FILE__": bad access!\n");
1322         goto fail;
1323     }
1324
1325     u = umask(0077);
1326     fd = mkstemp(fn);
1327     e = errno;
1328     umask(u);
1329
1330     if (fd < 0) {
1331         *_errno = e;
1332         debug(DEBUG_LEVEL_NORMAL, __FILE__": mkstemp() failed: %s\n", strerror(errno));
1333         goto fail;
1334     }
1335
1336     unlink(fn);
1337
1338     if (write(fd, sndstat, sizeof(sndstat) -1) != sizeof(sndstat)-1) {
1339         *_errno = errno;
1340         debug(DEBUG_LEVEL_NORMAL, __FILE__": write() failed: %s\n", strerror(errno));
1341         goto fail;
1342     }
1343
1344     if (lseek(fd, SEEK_SET, 0) < 0) {
1345         *_errno = errno;
1346         debug(DEBUG_LEVEL_NORMAL, __FILE__": lseek() failed: %s\n", strerror(errno));
1347         goto fail;
1348     }
1349
1350     return fd;
1351
1352 fail:
1353     if (fd >= 0)
1354         close(fd);
1355     return -1;
1356 }
1357
1358 int open(const char *filename, int flags, ...) {
1359     va_list args;
1360     mode_t mode = 0;
1361     int r, _errno = 0;
1362
1363     debug(DEBUG_LEVEL_VERBOSE, __FILE__": open(%s)\n", filename);
1364
1365     va_start(args, flags);
1366     if (flags & O_CREAT) {
1367       if (sizeof(mode_t) < sizeof(int))
1368         mode = va_arg(args, int);
1369       else
1370         mode = va_arg(args, mode_t);
1371     }
1372     va_end(args);
1373
1374     if (!function_enter()) {
1375         LOAD_OPEN_FUNC();
1376         return _open(filename, flags, mode);
1377     }
1378
1379     if (dsp_cloak_enable() && (strcmp(filename, "/dev/dsp") == 0 || strcmp(filename, "/dev/adsp") == 0)) {
1380         r = dsp_open(flags, &_errno);
1381     } else if (mixer_cloak_enable() && strcmp(filename, "/dev/mixer") == 0) {
1382         r = mixer_open(flags, &_errno);
1383     } else if (sndstat_cloak_enable() && strcmp(filename, "/dev/sndstat") == 0) {
1384         r = sndstat_open(flags, &_errno);
1385     } else {
1386         function_exit();
1387         LOAD_OPEN_FUNC();
1388         return _open(filename, flags, mode);
1389     }
1390
1391     function_exit();
1392
1393     if (_errno)
1394         errno = _errno;
1395
1396     return r;
1397 }
1398
1399 static int mixer_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
1400     int ret = -1;
1401
1402     switch (request) {
1403         case SOUND_MIXER_READ_DEVMASK :
1404             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_DEVMASK\n");
1405
1406             *(int*) argp = SOUND_MASK_PCM | SOUND_MASK_IGAIN;
1407             break;
1408
1409         case SOUND_MIXER_READ_RECMASK :
1410             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_RECMASK\n");
1411
1412             *(int*) argp = SOUND_MASK_IGAIN;
1413             break;
1414
1415         case SOUND_MIXER_READ_STEREODEVS:
1416             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_STEREODEVS\n");
1417
1418             pa_threaded_mainloop_lock(i->mainloop);
1419             *(int*) argp = 0;
1420             if (i->sink_volume.channels > 1)
1421                 *(int*) argp |= SOUND_MASK_PCM;
1422             if (i->source_volume.channels > 1)
1423                 *(int*) argp |= SOUND_MASK_IGAIN;
1424             pa_threaded_mainloop_unlock(i->mainloop);
1425
1426             break;
1427
1428         case SOUND_MIXER_READ_RECSRC:
1429             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_RECSRC\n");
1430
1431             *(int*) argp = SOUND_MASK_IGAIN;
1432             break;
1433
1434         case SOUND_MIXER_WRITE_RECSRC:
1435             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_RECSRC\n");
1436             break;
1437
1438         case SOUND_MIXER_READ_CAPS:
1439             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_CAPS\n");
1440
1441             *(int*) argp = 0;
1442             break;
1443
1444         case SOUND_MIXER_READ_PCM:
1445         case SOUND_MIXER_READ_IGAIN: {
1446             pa_cvolume *v;
1447
1448             if (request == SOUND_MIXER_READ_PCM)
1449                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_PCM\n");
1450             else
1451                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_READ_IGAIN\n");
1452
1453             pa_threaded_mainloop_lock(i->mainloop);
1454
1455             if (request == SOUND_MIXER_READ_PCM)
1456                 v = &i->sink_volume;
1457             else
1458                 v = &i->source_volume;
1459
1460             *(int*) argp =
1461                 ((v->values[0]*100/PA_VOLUME_NORM)) |
1462                 ((v->values[v->channels > 1 ? 1 : 0]*100/PA_VOLUME_NORM)  << 8);
1463
1464             pa_threaded_mainloop_unlock(i->mainloop);
1465
1466             break;
1467         }
1468
1469         case SOUND_MIXER_WRITE_PCM:
1470         case SOUND_MIXER_WRITE_IGAIN: {
1471             pa_cvolume v, *pv;
1472
1473             if (request == SOUND_MIXER_READ_PCM)
1474                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_PCM\n");
1475             else
1476                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_WRITE_IGAIN\n");
1477
1478             pa_threaded_mainloop_lock(i->mainloop);
1479
1480             if (request == SOUND_MIXER_READ_PCM) {
1481                 v = i->sink_volume;
1482                 pv = &i->sink_volume;
1483             } else {
1484                 v = i->source_volume;
1485                 pv = &i->source_volume;
1486             }
1487
1488             pv->values[0] = ((*(int*) argp & 0xFF)*PA_VOLUME_NORM)/100;
1489             pv->values[1] = ((*(int*) argp >> 8)*PA_VOLUME_NORM)/100;
1490
1491             if (!pa_cvolume_equal(pv, &v)) {
1492                 pa_operation *o;
1493
1494                 if (request == SOUND_MIXER_READ_PCM)
1495                     o = pa_context_set_sink_volume_by_index(i->context, i->sink_index, pv, context_success_cb, i);
1496                 else
1497                     o = pa_context_set_source_volume_by_index(i->context, i->source_index, pv, context_success_cb, i);
1498
1499                 if (!o)
1500                     debug(DEBUG_LEVEL_NORMAL, __FILE__":Failed set volume: %s", pa_strerror(pa_context_errno(i->context)));
1501                 else {
1502
1503                     i->operation_success = 0;
1504                     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1505                         CONTEXT_CHECK_DEAD_GOTO(i, exit_loop);
1506
1507                         pa_threaded_mainloop_wait(i->mainloop);
1508                     }
1509                 exit_loop:
1510
1511                     if (!i->operation_success)
1512                         debug(DEBUG_LEVEL_NORMAL, __FILE__": Failed to set volume: %s\n", pa_strerror(pa_context_errno(i->context)));
1513
1514                     pa_operation_unref(o);
1515                 }
1516
1517                 /* We don't wait for completion here */
1518                 i->volume_modify_count++;
1519             }
1520
1521             pa_threaded_mainloop_unlock(i->mainloop);
1522
1523             break;
1524         }
1525
1526         case SOUND_MIXER_INFO: {
1527             mixer_info *mi = argp;
1528
1529             debug(DEBUG_LEVEL_NORMAL, __FILE__": SOUND_MIXER_INFO\n");
1530
1531             memset(mi, 0, sizeof(mixer_info));
1532             strncpy(mi->id, "PULSEAUDIO", sizeof(mi->id));
1533             strncpy(mi->name, "PulseAudio Virtual OSS", sizeof(mi->name));
1534             pa_threaded_mainloop_lock(i->mainloop);
1535             mi->modify_counter = i->volume_modify_count;
1536             pa_threaded_mainloop_unlock(i->mainloop);
1537             break;
1538         }
1539
1540         default:
1541             debug(DEBUG_LEVEL_NORMAL, __FILE__": unknown ioctl 0x%08lx\n", request);
1542
1543             *_errno = EINVAL;
1544             goto fail;
1545     }
1546
1547     ret = 0;
1548
1549 fail:
1550
1551     return ret;
1552 }
1553
1554 static int map_format(int *fmt, pa_sample_spec *ss) {
1555
1556     switch (*fmt) {
1557         case AFMT_MU_LAW:
1558             ss->format = PA_SAMPLE_ULAW;
1559             break;
1560
1561         case AFMT_A_LAW:
1562             ss->format = PA_SAMPLE_ALAW;
1563             break;
1564
1565         case AFMT_S8:
1566             *fmt = AFMT_U8;
1567             /* fall through */
1568         case AFMT_U8:
1569             ss->format = PA_SAMPLE_U8;
1570             break;
1571
1572         case AFMT_U16_BE:
1573             *fmt = AFMT_S16_BE;
1574             /* fall through */
1575         case AFMT_S16_BE:
1576             ss->format = PA_SAMPLE_S16BE;
1577             break;
1578
1579         case AFMT_U16_LE:
1580             *fmt = AFMT_S16_LE;
1581             /* fall through */
1582         case AFMT_S16_LE:
1583             ss->format = PA_SAMPLE_S16LE;
1584             break;
1585
1586         default:
1587             ss->format = PA_SAMPLE_S16NE;
1588             *fmt = AFMT_S16_NE;
1589             break;
1590     }
1591
1592     return 0;
1593 }
1594
1595 static int map_format_back(pa_sample_format_t format) {
1596     switch (format) {
1597         case PA_SAMPLE_S16LE: return AFMT_S16_LE;
1598         case PA_SAMPLE_S16BE: return AFMT_S16_BE;
1599         case PA_SAMPLE_ULAW: return AFMT_MU_LAW;
1600         case PA_SAMPLE_ALAW: return AFMT_A_LAW;
1601         case PA_SAMPLE_U8: return AFMT_U8;
1602         default:
1603             abort();
1604     }
1605 }
1606
1607 static int dsp_flush_fd(int fd) {
1608 #ifdef SIOCINQ
1609     int l;
1610
1611     if (ioctl(fd, SIOCINQ, &l) < 0) {
1612         debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ: %s\n", strerror(errno));
1613         return -1;
1614     }
1615
1616     while (l > 0) {
1617         char buf[1024];
1618         size_t k;
1619
1620         k = (size_t) l > sizeof(buf) ? sizeof(buf) : (size_t) l;
1621         if (read(fd, buf, k) < 0)
1622             debug(DEBUG_LEVEL_NORMAL, __FILE__": read(): %s\n", strerror(errno));
1623         l -= k;
1624     }
1625
1626     return 0;
1627 #else
1628 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1629     return 0;
1630 #endif
1631 }
1632
1633 static int dsp_flush_socket(fd_info *i) {
1634     int res = 0;
1635
1636     if ((i->thread_fd < 0) && (i->app_fd < 0))
1637         return -1;
1638
1639     if (i->thread_fd >= 0)
1640         res = dsp_flush_fd(i->thread_fd);
1641
1642     if (res < 0)
1643         return res;
1644
1645     if (i->app_fd >= 0)
1646         res = dsp_flush_fd(i->app_fd);
1647
1648     if (res < 0)
1649         return res;
1650
1651     return 0;
1652 }
1653
1654 static int dsp_empty_socket(fd_info *i) {
1655 #ifdef SIOCINQ
1656     int ret = -1;
1657
1658     /* Empty the socket */
1659     for (;;) {
1660         int l;
1661
1662         if (i->thread_fd < 0)
1663             break;
1664
1665         if (ioctl(i->thread_fd, SIOCINQ, &l) < 0) {
1666             debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ: %s\n", strerror(errno));
1667             break;
1668         }
1669
1670         if (!l) {
1671             ret = 0;
1672             break;
1673         }
1674
1675         pa_threaded_mainloop_wait(i->mainloop);
1676     }
1677
1678     return ret;
1679 #else
1680 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1681     return 0;
1682 #endif
1683 }
1684
1685 static int dsp_drain(fd_info *i) {
1686     pa_operation *o = NULL;
1687     int r = -1;
1688
1689     if (!i->mainloop)
1690         return 0;
1691
1692     debug(DEBUG_LEVEL_NORMAL, __FILE__": Draining.\n");
1693
1694     pa_threaded_mainloop_lock(i->mainloop);
1695
1696     if (dsp_empty_socket(i) < 0)
1697         goto fail;
1698
1699     if (!i->play_stream)
1700         goto fail;
1701
1702     debug(DEBUG_LEVEL_NORMAL, __FILE__": Really draining.\n");
1703
1704     if (!(o = pa_stream_drain(i->play_stream, stream_success_cb, i))) {
1705         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drain(): %s\n", pa_strerror(pa_context_errno(i->context)));
1706         goto fail;
1707     }
1708
1709     i->operation_success = 0;
1710     while (pa_operation_get_state(o) != PA_OPERATION_DONE) {
1711         PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, fail);
1712
1713         pa_threaded_mainloop_wait(i->mainloop);
1714     }
1715
1716     if (!i->operation_success) {
1717         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_drain() 2: %s\n", pa_strerror(pa_context_errno(i->context)));
1718         goto fail;
1719     }
1720
1721     r = 0;
1722
1723 fail:
1724
1725     if (o)
1726         pa_operation_unref(o);
1727
1728     pa_threaded_mainloop_unlock(i->mainloop);
1729
1730     return 0;
1731 }
1732
1733 static int dsp_trigger(fd_info *i) {
1734     pa_operation *o = NULL;
1735     int r = -1;
1736
1737     if (!i->play_stream)
1738         return 0;
1739
1740     pa_threaded_mainloop_lock(i->mainloop);
1741
1742     if (dsp_empty_socket(i) < 0)
1743         goto fail;
1744
1745     debug(DEBUG_LEVEL_NORMAL, __FILE__": Triggering.\n");
1746
1747     if (!(o = pa_stream_trigger(i->play_stream, stream_success_cb, i))) {
1748         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_trigger(): %s\n", pa_strerror(pa_context_errno(i->context)));
1749         goto fail;
1750     }
1751
1752     i->operation_success = 0;
1753     while (!pa_operation_get_state(o) != PA_OPERATION_DONE) {
1754         PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, fail);
1755
1756         pa_threaded_mainloop_wait(i->mainloop);
1757     }
1758
1759     if (!i->operation_success) {
1760         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_trigger(): %s\n", pa_strerror(pa_context_errno(i->context)));
1761         goto fail;
1762     }
1763
1764     r = 0;
1765
1766 fail:
1767
1768     if (o)
1769         pa_operation_unref(o);
1770
1771     pa_threaded_mainloop_unlock(i->mainloop);
1772
1773     return 0;
1774 }
1775
1776 static int dsp_ioctl(fd_info *i, unsigned long request, void*argp, int *_errno) {
1777     int ret = -1;
1778
1779     switch (request) {
1780         case SNDCTL_DSP_SETFMT: {
1781             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SETFMT: %i\n", *(int*) argp);
1782
1783             pa_threaded_mainloop_lock(i->mainloop);
1784
1785             if (*(int*) argp == AFMT_QUERY)
1786                 *(int*) argp = map_format_back(i->sample_spec.format);
1787             else {
1788                 map_format((int*) argp, &i->sample_spec);
1789                 free_streams(i);
1790             }
1791
1792             pa_threaded_mainloop_unlock(i->mainloop);
1793             break;
1794         }
1795
1796         case SNDCTL_DSP_SPEED: {
1797             pa_sample_spec ss;
1798             int valid;
1799             char t[256];
1800
1801             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SPEED: %i\n", *(int*) argp);
1802
1803             pa_threaded_mainloop_lock(i->mainloop);
1804
1805             ss = i->sample_spec;
1806             ss.rate = *(int*) argp;
1807
1808             if ((valid = pa_sample_spec_valid(&ss))) {
1809                 i->sample_spec = ss;
1810                 free_streams(i);
1811             }
1812
1813             debug(DEBUG_LEVEL_NORMAL, __FILE__": ss: %s\n", pa_sample_spec_snprint(t, sizeof(t), &i->sample_spec));
1814
1815             pa_threaded_mainloop_unlock(i->mainloop);
1816
1817             if (!valid) {
1818                 *_errno = EINVAL;
1819                 goto fail;
1820             }
1821
1822             break;
1823         }
1824
1825         case SNDCTL_DSP_STEREO:
1826             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_STEREO: %i\n", *(int*) argp);
1827
1828             pa_threaded_mainloop_lock(i->mainloop);
1829
1830             i->sample_spec.channels = *(int*) argp ? 2 : 1;
1831             free_streams(i);
1832
1833             pa_threaded_mainloop_unlock(i->mainloop);
1834             return 0;
1835
1836         case SNDCTL_DSP_CHANNELS: {
1837             pa_sample_spec ss;
1838             int valid;
1839
1840             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_CHANNELS: %i\n", *(int*) argp);
1841
1842             pa_threaded_mainloop_lock(i->mainloop);
1843
1844             ss = i->sample_spec;
1845             ss.channels = *(int*) argp;
1846
1847             if ((valid = pa_sample_spec_valid(&ss))) {
1848                 i->sample_spec = ss;
1849                 free_streams(i);
1850             }
1851
1852             pa_threaded_mainloop_unlock(i->mainloop);
1853
1854             if (!valid) {
1855                 *_errno = EINVAL;
1856                 goto fail;
1857             }
1858
1859             break;
1860         }
1861
1862         case SNDCTL_DSP_GETBLKSIZE:
1863             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETBLKSIZE\n");
1864
1865             pa_threaded_mainloop_lock(i->mainloop);
1866
1867             fix_metrics(i);
1868             *(int*) argp = i->fragment_size;
1869
1870             pa_threaded_mainloop_unlock(i->mainloop);
1871
1872             break;
1873
1874         case SNDCTL_DSP_SETFRAGMENT:
1875             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SETFRAGMENT: 0x%8x\n", *(int*) argp);
1876
1877             pa_threaded_mainloop_lock(i->mainloop);
1878
1879             i->fragment_size = 1 << (*(int*) argp);
1880             i->n_fragments = (*(int*) argp) >> 16;
1881
1882             /* 0x7FFF means that we can set whatever we like */
1883             if (i->n_fragments == 0x7FFF)
1884                 i->n_fragments = 12;
1885
1886             free_streams(i);
1887
1888             pa_threaded_mainloop_unlock(i->mainloop);
1889
1890             break;
1891
1892         case SNDCTL_DSP_GETCAPS:
1893             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_CAPS\n");
1894
1895             *(int*)  argp = DSP_CAP_DUPLEX
1896 #ifdef DSP_CAP_MULTI
1897               | DSP_CAP_MULTI
1898 #endif
1899               ;
1900             break;
1901
1902         case SNDCTL_DSP_GETODELAY: {
1903             int l;
1904
1905             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETODELAY\n");
1906
1907             pa_threaded_mainloop_lock(i->mainloop);
1908
1909             *(int*) argp = 0;
1910
1911             for (;;) {
1912                 pa_usec_t usec;
1913
1914                 PLAYBACK_STREAM_CHECK_DEAD_GOTO(i, exit_loop);
1915
1916                 if (pa_stream_get_latency(i->play_stream, &usec, NULL) >= 0) {
1917                     *(int*) argp = pa_usec_to_bytes(usec, &i->sample_spec);
1918                     break;
1919                 }
1920
1921                 if (pa_context_errno(i->context) != PA_ERR_NODATA) {
1922                     debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_get_latency(): %s\n", pa_strerror(pa_context_errno(i->context)));
1923                     break;
1924                 }
1925
1926                 pa_threaded_mainloop_wait(i->mainloop);
1927             }
1928
1929         exit_loop:
1930
1931 #ifdef SIOCINQ
1932             if (ioctl(i->thread_fd, SIOCINQ, &l) < 0)
1933                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
1934             else
1935                 *(int*) argp += l;
1936 #else
1937 # warning "Your platform does not support SIOCINQ, something might not work as intended."
1938 #endif
1939
1940             pa_threaded_mainloop_unlock(i->mainloop);
1941
1942             debug(DEBUG_LEVEL_NORMAL, __FILE__": ODELAY: %i\n", *(int*) argp);
1943
1944             break;
1945         }
1946
1947         case SNDCTL_DSP_RESET: {
1948             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_RESET\n");
1949
1950             pa_threaded_mainloop_lock(i->mainloop);
1951
1952             free_streams(i);
1953             dsp_flush_socket(i);
1954             reset_params(i);
1955
1956             pa_threaded_mainloop_unlock(i->mainloop);
1957             break;
1958         }
1959
1960         case SNDCTL_DSP_GETFMTS: {
1961             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETFMTS\n");
1962
1963             *(int*) argp = AFMT_MU_LAW|AFMT_A_LAW|AFMT_U8|AFMT_S16_LE|AFMT_S16_BE;
1964             break;
1965         }
1966
1967         case SNDCTL_DSP_POST:
1968             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_POST\n");
1969
1970             if (dsp_trigger(i) < 0)
1971                 *_errno = EIO;
1972             break;
1973
1974         case SNDCTL_DSP_SYNC:
1975             debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_SYNC\n");
1976
1977             if (dsp_drain(i) < 0)
1978                 *_errno = EIO;
1979
1980             break;
1981
1982         case SNDCTL_DSP_GETOSPACE:
1983         case SNDCTL_DSP_GETISPACE: {
1984             audio_buf_info *bi = (audio_buf_info*) argp;
1985             int l = 0;
1986             size_t k = 0;
1987
1988             if (request == SNDCTL_DSP_GETOSPACE)
1989                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETOSPACE\n");
1990             else
1991                 debug(DEBUG_LEVEL_NORMAL, __FILE__": SNDCTL_DSP_GETISPACE\n");
1992
1993             pa_threaded_mainloop_lock(i->mainloop);
1994
1995             fix_metrics(i);
1996
1997             if (request == SNDCTL_DSP_GETOSPACE) {
1998                 if (i->play_stream) {
1999                     if ((k = pa_stream_writable_size(i->play_stream)) == (size_t) -1)
2000                         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_writable_size(): %s\n", pa_strerror(pa_context_errno(i->context)));
2001                 } else
2002                     k = i->fragment_size * i->n_fragments;
2003
2004 #ifdef SIOCINQ
2005                 if (ioctl(i->thread_fd, SIOCINQ, &l) < 0) {
2006                     debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
2007                     l = 0;
2008                 }
2009 #else
2010 # warning "Your platform does not dsp_flush_fd, something might not work as intended."
2011 #endif
2012
2013                 bi->bytes = k > (size_t) l ? k - l : 0;
2014             } else {
2015                 if (i->rec_stream) {
2016                     if ((k = pa_stream_readable_size(i->rec_stream)) == (size_t) -1)
2017                         debug(DEBUG_LEVEL_NORMAL, __FILE__": pa_stream_readable_size(): %s\n", pa_strerror(pa_context_errno(i->context)));
2018                 } else
2019                     k = 0;
2020
2021 #ifdef SIOCINQ
2022                 if (ioctl(i->app_fd, SIOCINQ, &l) < 0) {
2023                     debug(DEBUG_LEVEL_NORMAL, __FILE__": SIOCINQ failed: %s\n", strerror(errno));
2024                     l = 0;
2025                 }
2026 #else
2027 # warning "Your platform does not dsp_flush_fd, something might not work as intended."
2028 #endif
2029                 bi->bytes = k + l;
2030             }
2031
2032             bi->fragsize = i->fragment_size;
2033             bi->fragstotal = i->n_fragments;
2034             bi->fragments = bi->bytes / bi->fragsize;
2035
2036             pa_threaded_mainloop_unlock(i->mainloop);
2037
2038             debug(DEBUG_LEVEL_NORMAL, __FILE__": fragsize=%i, fragstotal=%i, bytes=%i, fragments=%i\n", bi->fragsize, bi->fragstotal, bi->bytes, bi->fragments);
2039
2040             break;
2041         }
2042
2043         case SNDCTL_DSP_GETIPTR:
2044             debug(DEBUG_LEVEL_NORMAL, __FILE__": invalid ioctl SNDCTL_DSP_GETIPTR\n");
2045             goto inval;
2046
2047         case SNDCTL_DSP_GETOPTR:
2048             debug(DEBUG_LEVEL_NORMAL, __FILE__": invalid ioctl SNDCTL_DSP_GETOPTR\n");
2049             goto inval;
2050
2051         default:
2052             debug(DEBUG_LEVEL_NORMAL, __FILE__": unknown ioctl 0x%08lx\n", request);
2053
2054 inval:
2055             *_errno = EINVAL;
2056             goto fail;
2057     }
2058
2059     ret = 0;
2060
2061 fail:
2062
2063     return ret;
2064 }
2065
2066 int ioctl(int fd, unsigned long request, ...) {
2067     fd_info *i;
2068     va_list args;
2069     void *argp;
2070     int r, _errno = 0;
2071
2072     debug(DEBUG_LEVEL_VERBOSE, __FILE__": ioctl()\n");
2073
2074     va_start(args, request);
2075     argp = va_arg(args, void *);
2076     va_end(args);
2077
2078     if (!function_enter()) {
2079         LOAD_IOCTL_FUNC();
2080         return _ioctl(fd, request, argp);
2081     }
2082
2083     if (!(i = fd_info_find(fd))) {
2084         function_exit();
2085         LOAD_IOCTL_FUNC();
2086         return _ioctl(fd, request, argp);
2087     }
2088
2089     if (i->type == FD_INFO_MIXER)
2090         r = mixer_ioctl(i, request, argp, &_errno);
2091     else
2092         r = dsp_ioctl(i, request, argp, &_errno);
2093
2094     fd_info_unref(i);
2095
2096     if (_errno)
2097         errno = _errno;
2098
2099     function_exit();
2100
2101     return r;
2102 }
2103
2104 int close(int fd) {
2105     fd_info *i;
2106
2107     debug(DEBUG_LEVEL_VERBOSE, __FILE__": close()\n");
2108
2109     if (!function_enter()) {
2110         LOAD_CLOSE_FUNC();
2111         return _close(fd);
2112     }
2113
2114     if (!(i = fd_info_find(fd))) {
2115         function_exit();
2116         LOAD_CLOSE_FUNC();
2117         return _close(fd);
2118     }
2119
2120     fd_info_remove_from_list(i);
2121     fd_info_unref(i);
2122
2123     function_exit();
2124
2125     return 0;
2126 }
2127
2128 int access(const char *pathname, int mode) {
2129
2130     if (!pathname) {
2131         /* Firefox needs this. See #27 */
2132         errno = EFAULT;
2133         return -1;
2134     }
2135
2136     debug(DEBUG_LEVEL_VERBOSE, __FILE__": access(%s)\n", pathname);
2137
2138     if (strcmp(pathname, "/dev/dsp") != 0 &&
2139         strcmp(pathname, "/dev/adsp") != 0 &&
2140         strcmp(pathname, "/dev/sndstat") != 0 &&
2141         strcmp(pathname, "/dev/mixer") != 0) {
2142         LOAD_ACCESS_FUNC();
2143         return _access(pathname, mode);
2144     }
2145
2146     if (mode & (W_OK | X_OK)) {
2147         debug(DEBUG_LEVEL_NORMAL, __FILE__": access(%s, %x) = EACCESS\n", pathname, mode);
2148         errno = EACCES;
2149         return -1;
2150     }
2151
2152     debug(DEBUG_LEVEL_NORMAL, __FILE__": access(%s, %x) = OK\n", pathname, mode);
2153
2154     return 0;
2155 }
2156
2157 #ifdef HAVE_OPEN64
2158
2159 int open64(const char *filename, int flags, ...) {
2160     va_list args;
2161     mode_t mode = 0;
2162
2163     debug(DEBUG_LEVEL_VERBOSE, __FILE__": open64(%s)\n", filename);
2164
2165     va_start(args, flags);
2166     if (flags & O_CREAT)
2167         mode = va_arg(args, mode_t);
2168     va_end(args);
2169
2170     if (strcmp(filename, "/dev/dsp") != 0 &&
2171         strcmp(filename, "/dev/adsp") != 0 &&
2172         strcmp(filename, "/dev/sndstat") != 0 &&
2173         strcmp(filename, "/dev/mixer") != 0) {
2174         LOAD_OPEN64_FUNC();
2175         return _open64(filename, flags, mode);
2176     }
2177
2178     return open(filename, flags, mode);
2179 }
2180
2181 #endif
2182
2183 FILE* fopen(const char *filename, const char *mode) {
2184     FILE *f = NULL;
2185     int fd;
2186     mode_t m;
2187
2188     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fopen(%s)\n", filename);
2189
2190     if (strcmp(filename, "/dev/dsp") != 0 &&
2191         strcmp(filename, "/dev/adsp") != 0 &&
2192         strcmp(filename, "/dev/sndstat") != 0 &&
2193         strcmp(filename, "/dev/mixer") != 0) {
2194         LOAD_FOPEN_FUNC();
2195         return _fopen(filename, mode);
2196     }
2197
2198     switch (mode[0]) {
2199     case 'r':
2200         m = O_RDONLY;
2201         break;
2202     case 'w':
2203     case 'a':
2204         m = O_WRONLY;
2205         break;
2206     default:
2207         errno = EINVAL;
2208         return NULL;
2209     }
2210
2211     if ((((mode[1] == 'b') || (mode[1] == 't')) && (mode[2] == '+')) || (mode[1] == '+'))
2212         m = O_RDWR;
2213
2214     if ((fd = open(filename, m)) < 0)
2215         return NULL;
2216
2217     if (!(f = fdopen(fd, mode))) {
2218         close(fd);
2219         return NULL;
2220     }
2221
2222     return f;
2223 }
2224
2225 #ifdef HAVE_OPEN64
2226
2227 FILE *fopen64(const char *filename, const char *mode) {
2228
2229     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fopen64(%s)\n", filename);
2230
2231     if (strcmp(filename, "/dev/dsp") != 0 &&
2232         strcmp(filename, "/dev/adsp") != 0 &&
2233         strcmp(filename, "/dev/sndstat") != 0 &&
2234         strcmp(filename, "/dev/mixer") != 0) {
2235         LOAD_FOPEN64_FUNC();
2236         return _fopen64(filename, mode);
2237     }
2238
2239     return fopen(filename, mode);
2240 }
2241
2242 #endif
2243
2244 int fclose(FILE *f) {
2245     fd_info *i;
2246
2247     debug(DEBUG_LEVEL_VERBOSE, __FILE__": fclose()\n");
2248
2249     if (!function_enter()) {
2250         LOAD_FCLOSE_FUNC();
2251         return _fclose(f);
2252     }
2253
2254     if (!(i = fd_info_find(fileno(f)))) {
2255         function_exit();
2256         LOAD_FCLOSE_FUNC();
2257         return _fclose(f);
2258     }
2259
2260     fd_info_remove_from_list(i);
2261
2262     /* Dirty trick to avoid that the fd is not freed twice, once by us
2263      * and once by the real fclose() */
2264     i->app_fd = -1;
2265
2266     fd_info_unref(i);
2267
2268     function_exit();
2269
2270     LOAD_FCLOSE_FUNC();
2271     return _fclose(f);
2272 }