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 static void *parse_receiver_args(int receiver_num, char *options)
  19 {
  20         struct receiver *r = &receivers[receiver_num];
  21         char **argv;
  22         int argc, i;
  23         void *conf;
  24
  25
  26 //      PARA_DEBUG_LOG("%s, options: %s\n", r->name,
  27 //              options? options : "(none)");
  28         if (options) {
  29                 PARA_DEBUG_LOG("options: %s\n", options);
  30                 argc = split_args(options, &argv, " \t");
  31                 for (i = argc - 1; i >= 0; i--)
  32                         argv[i + 1] = argv[i];
  33                 argv[0] = para_strdup(r->name);
  34                 argc += 1;
  35                 PARA_DEBUG_LOG("argc = %d, argv[0]: %s\n", argc, argv[0]);
  36         } else {
  37                 argc = 1;
  38                 argv = para_malloc(2 * sizeof(char*));
  39                 argv[0] = NULL;
  40                 argv[1] = NULL;
  41         }
  42         conf = r->parse_config(argc, argv);
  43         free(argv[0]);
  44         free(argv);
  45         return conf;
  46 }
  47
  48 /**
  49  * check if given string is a valid command line for any receiver
  50  *
  51  * \param \ra string of the form receiver_name:options
  52  * \param receiver_num contains the number of the receiver upon success
  53  *
  54  * This function checks whether \a ra starts with the name of a supported
  55  * paraslash receiver, optinally followed by a colon and any options for that
  56  * receiver. If a valid receiver name was found and further are present, the
  57  * remaining part of \a ra is passed to that receiver's config parser.
  58  *
  59  * \return On success, a pointer to the gengetopt args info struct is returned
  60  * and \a receiver_num contains the number of the receiver. Otherwise this function
  61  * returns \p NULL.
  62  */
  63 void *check_receiver_arg(char *ra, int *receiver_num)
  64 {
  65         int j;
  66
  67         PARA_DEBUG_LOG("checking %s\n", ra);
  68         for (j = 0; receivers[j].name; j++) {
  69                 const char *name = receivers[j].name;
  70                 size_t len = strlen(name);
  71                 char c;
  72                 if (strlen(ra) < len)
  73                         continue;
  74                 if (strncmp(name, ra, len))
  75                         continue;
  76                 c = ra[len];
  77                 if (c && c != ' ')
  78                         continue;
  79                 if (c && !receivers[j].parse_config)
  80                         return NULL;
  81                 *receiver_num = j;
  82                 return parse_receiver_args(j, c? ra + len + 1: NULL);
  83         }
  84         PARA_ERROR_LOG("receiver not found\n");
  85         return NULL;
  86 }
  87
  88 /**
  89  * Print out the help texts to all receivers.
  90  *
  91  * \param detailed Whether the detailed help should be printed.
  92  */
  93 void print_receiver_helps(int detailed)
  94 {
  95         int i;
  96
  97         printf_or_die("\nAvailable receivers: \n\t");
  98         FOR_EACH_RECEIVER(i)
  99                 printf_or_die("%s%s", i? " " : "", receivers[i].name);
 100         printf_or_die("\n\n");
 101         FOR_EACH_RECEIVER(i) {
 102                 struct receiver *r = receivers + i;
 103
 104                 if (!r->help.short_help)
 105                         continue;
 106                 printf_or_die("Options for %s:\n", r->name);
 107                 ggo_print_help(&r->help, detailed);
 108         }
 109 }