src/modules/module-esound-compat-spawnfd.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   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 #include <unistd.h>
  27 #include <string.h>
  28 #include <errno.h>
  29
  30 #include <pulsecore/core-error.h>
  31 #include <pulsecore/module.h>
  32 #include <pulsecore/modargs.h>
  33 #include <pulsecore/core-util.h>
  34 #include <pulsecore/log.h>
  35
  36 #include "module-esound-compat-spawnfd-symdef.h"
  37
  38 PA_MODULE_AUTHOR("Lennart Poettering");
  39 PA_MODULE_DESCRIPTION("ESOUND compatibility module: -spawnfd emulation");
  40 PA_MODULE_LOAD_ONCE(TRUE);
  41 PA_MODULE_VERSION(PACKAGE_VERSION);
  42 PA_MODULE_USAGE("fd=<file descriptor>");
  43
  44 static const char* const valid_modargs[] = {
  45     "fd",
  46     NULL,
  47 };
  48
  49 int pa__init(pa_module*m) {
  50     pa_modargs *ma = NULL;
  51     int ret = -1, fd = -1;
  52     char x = 1;
  53
  54     pa_assert(m);
  55
  56     if (!(ma = pa_modargs_new(m->argument, valid_modargs)) ||
  57         pa_modargs_get_value_s32(ma, "fd", &fd) < 0 ||
  58         fd < 0) {
  59
  60         pa_log("Failed to parse module arguments");
  61         goto finish;
  62     }
  63
  64     if (pa_loop_write(fd, &x, sizeof(x), NULL) != sizeof(x))
  65         pa_log_warn("write(%u, 1, 1) failed: %s", fd, pa_cstrerror(errno));
  66
  67     pa_assert_se(pa_close(fd) == 0);
  68
  69     pa_module_unload_request(m, TRUE);
  70
  71     ret = 0;
  72
  73 finish:
  74     if (ma)
  75         pa_modargs_free(ma);
  76
  77     return ret;
  78 }