recv_common.c

   1 /*
   2  * Copyright (C) 2006-2009 Andre Noll <maan@systemlinux.org>
   3  *
   4  * Licensed under the GPL v2. For licencing details see COPYING.
   5  */
   6
   7 /** \file recv_common.c common functions of para_recv and para_audiod */
   8
   9 #include "para.h"
  10
  11 #include "list.h"
  12 #include "sched.h"
  13 #include "ggo.h"
  14 #include "recv.h"
  15 #include "string.h"
  16
  17 DEFINE_RECEIVER_ARRAY;
  18
  19 /**
  20  * Call the init function of each paraslash receiver.
  21  */
  22 void recv_init(void)
  23 {
  24         int i;
  25
  26         FOR_EACH_RECEIVER(i)
  27                 receivers[i].init(&receivers[i]);
  28 }
  29
  30 static void *parse_receiver_args(int receiver_num, char *options)
  31 {
  32         struct receiver *r = &receivers[receiver_num];
  33         char **argv;
  34         int argc, i;
  35         void *conf;
  36
  37
  38 //      PARA_DEBUG_LOG("%s, options: %s\n", r->name,
  39 //              options? options : "(none)");
  40         if (options) {
  41                 PARA_DEBUG_LOG("options: %s\n", options);
  42                 argc = split_args(options, &argv, " \t");
  43                 for (i = argc - 1; i >= 0; i--)
  44                         argv[i + 1] = argv[i];
  45                 argc += 1;
  46         } else {
  47                 argc = 1;
  48                 argv = para_malloc(2 * sizeof(char*));
  49                 argv[1] = NULL;
  50         }
  51         argv[0] = make_message("%s_recv", r->name);
  52         conf = r->parse_config(argc, argv);
  53         free(argv[0]);
  54         free(argv);
  55         return conf;
  56 }
  57
  58 /**
  59  * check if given string is a valid command line for any receiver
  60  *
  61  * \param \ra string of the form receiver_name:options
  62  * \param receiver_num contains the number of the receiver upon success
  63  *
  64  * This function checks whether \a ra starts with the name of a supported
  65  * paraslash receiver, optinally followed by a colon and any options for that
  66  * receiver. If a valid receiver name was found and further are present, the
  67  * remaining part of \a ra is passed to that receiver's config parser.
  68  *
  69  * \return On success, a pointer to the gengetopt args info struct is returned
  70  * and \a receiver_num contains the number of the receiver. Otherwise this function
  71  * returns \p NULL.
  72  */
  73 void *check_receiver_arg(char *ra, int *receiver_num)
  74 {
  75         int j;
  76
  77         PARA_DEBUG_LOG("checking %s\n", ra);
  78         for (j = 0; receivers[j].name; j++) {
  79                 const char *name = receivers[j].name;
  80                 size_t len = strlen(name);
  81                 char c;
  82                 if (strlen(ra) < len)
  83                         continue;
  84                 if (strncmp(name, ra, len))
  85                         continue;
  86                 c = ra[len];
  87                 if (c && c != ' ')
  88                         continue;
  89                 if (c && !receivers[j].parse_config)
  90                         return NULL;
  91                 *receiver_num = j;
  92                 return parse_receiver_args(j, c? ra + len + 1: NULL);
  93         }
  94         PARA_ERROR_LOG("receiver not found\n");
  95         return NULL;
  96 }
  97
  98 /**
  99  * Print out the help texts to all receivers.
 100  *
 101  * \param detailed Whether the detailed help should be printed.
 102  */
 103 void print_receiver_helps(int detailed)
 104 {
 105         int i;
 106
 107         printf_or_die("\nAvailable receivers: \n\t");
 108         FOR_EACH_RECEIVER(i)
 109                 printf_or_die("%s%s", i? " " : "", receivers[i].name);
 110         printf_or_die("\n\n");
 111         FOR_EACH_RECEIVER(i) {
 112                 struct receiver *r = receivers + i;
 113                 if (!r->help.short_help)
 114                         continue;
 115                 printf_or_die("Options for %s:\n", r->name);
 116                 ggo_print_help(&r->help, detailed);
 117         }
 118 }