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