recv.c

   1 /*
   2  * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file recv.c the stand-alone audio stream receiver */
   8
   9 #include <regex.h>
  10 #include <sys/types.h>
  11 #include <dirent.h>
  12
  13 #include "para.h"
  14 #include "list.h"
  15 #include "sched.h"
  16 #include "ggo.h"
  17 #include "recv.h"
  18 #include "recv.cmdline.h"
  19 #include "fd.h"
  20 #include "string.h"
  21 #include "error.h"
  22 #include "stdout.h"
  23
  24 /** The gengetopt args info struct. */
  25 static struct recv_args_info conf;
  26
  27 static int loglevel;
  28 /** Always log to stderr. */
  29 INIT_STDERR_LOGGING(loglevel);
  30
  31 /** init array of error codes used by para_recv */
  32 INIT_RECV_ERRLISTS;
  33
  34 __noreturn static void print_help_and_die(void)
  35 {
  36         int d = conf.detailed_help_given;
  37         const char **p = d? recv_args_info_detailed_help
  38                 : recv_args_info_help;
  39
  40         printf_or_die("%s\n\n", RECV_CMDLINE_PARSER_PACKAGE "-"
  41                 RECV_CMDLINE_PARSER_VERSION);
  42         printf_or_die("%s\n\n", recv_args_info_usage);
  43         for (; *p; p++)
  44                 printf_or_die("%s\n", *p);
  45         print_receiver_helps(d);
  46         exit(0);
  47 }
  48
  49 static void *parse_config(int argc, char *argv[], int *receiver_num)
  50 {
  51         if (recv_cmdline_parser(argc, argv, &conf))
  52                 return NULL;
  53         HANDLE_VERSION_FLAG("recv", conf);
  54         if (conf.help_given || conf.detailed_help_given)
  55                 print_help_and_die();
  56         loglevel = get_loglevel_by_name(conf.loglevel_arg);
  57         return check_receiver_arg(conf.receiver_arg, receiver_num);
  58 }
  59
  60 /**
  61  * the main function of para_recv
  62  *
  63  * \param argc number of arguments
  64  * \param argv vector of arguments
  65  *
  66  * para_recv uses the specified receiver to receive an audio stream sent by
  67  * para_server. The received data is written to stdout.
  68  *
  69  * \return \a EXIT_SUCCESS on success, \a EXIT_FAILURE on errors.
  70  */
  71 int main(int argc, char *argv[])
  72 {
  73         int ret, r_opened = 0, receiver_num;
  74         struct receiver *r = NULL;
  75         struct receiver_node rn;
  76         struct stdout_task sot;
  77         static struct sched s;
  78
  79         s.default_timeout.tv_sec = 1;
  80         s.default_timeout.tv_usec = 0;
  81
  82         memset(&sot, 0, sizeof(struct stdout_task));
  83         memset(&rn, 0, sizeof(struct receiver_node));
  84         recv_init();
  85         ret = -E_RECV_SYNTAX;
  86         rn.conf = parse_config(argc, argv, &receiver_num);
  87         if (!rn.conf) {
  88                 PARA_EMERG_LOG("parse failed\n");
  89                 goto out;
  90         }
  91         r = &receivers[receiver_num];
  92         rn.receiver = r;
  93         ret = r->open(&rn);
  94         if (ret < 0)
  95                 goto out;
  96         r_opened = 1;
  97
  98         stdout_set_defaults(&sot);
  99         sot.bufp = &rn.buf;
 100         sot.loaded = &rn.loaded;
 101         sot.input_error = &rn.task.error;
 102         register_task(&sot.task);
 103
 104         rn.task.pre_select = r->pre_select;
 105         rn.task.post_select = r->post_select;
 106         sprintf(rn.task.status, "receiver node");
 107         register_task(&rn.task);
 108
 109         ret = schedule(&s);
 110 out:
 111         if (r_opened)
 112                 r->close(&rn);
 113         if (r)
 114                 r->shutdown();
 115         if (ret < 0)
 116                 PARA_ERROR_LOG("%s\n", para_strerror(-ret));
 117         return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;
 118 }