recv_common.c

   1 /*
   2  * Copyright (C) 2006-2008 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 "recv.h"
  14 #include "string.h"
  15
  16 DEFINE_RECEIVER_ARRAY;
  17 static void *parse_receiver_args(int receiver_num, char *options)
  18 {
  19         struct receiver *r = &receivers[receiver_num];
  20         char **argv;
  21         int argc, i;
  22         void *conf;
  23
  24
  25 //      PARA_DEBUG_LOG("%s, options: %s\n", r->name,
  26 //              options? options : "(none)");
  27         if (options) {
  28                 PARA_DEBUG_LOG("options: %s\n", options);
  29                 argc = split_args(options, &argv, " \t");
  30                 for (i = argc - 1; i >= 0; i--)
  31                         argv[i + 1] = argv[i];
  32                 argv[0] = para_strdup(r->name);
  33                 argc += 1;
  34                 PARA_DEBUG_LOG("argc = %d, argv[0]: %s\n", argc, argv[0]);
  35         } else {
  36                 argc = 1;
  37                 argv = para_malloc(2 * sizeof(char*));
  38                 argv[0] = NULL;
  39                 argv[1] = NULL;
  40         }
  41         conf = r->parse_config(argc, argv);
  42         free(argv[0]);
  43         free(argv);
  44         return conf;
  45 }
  46
  47 /**
  48  * check if given string is a valid command line for any receiver
  49  *
  50  * \param \ra string of the form receiver_name:options
  51  * \param receiver_num contains the number of the receiver upon success
  52  *
  53  * This function checks whether \a ra starts with the name of a supported
  54  * paraslash receiver, optinally followed by a colon and any options for that
  55  * receiver. If a valid receiver name was found and further are present, the
  56  * remaining part of \a ra is passed to that receiver's config parser.
  57  *
  58  * \return On success, a pointer to the gengetopt args info struct is returned
  59  * and \a receiver_num contains the number of the receiver. Otherwise this function
  60  * returns \p NULL.
  61  */
  62 void *check_receiver_arg(char *ra, int *receiver_num)
  63 {
  64         int j;
  65
  66         PARA_DEBUG_LOG("checking %s\n", ra);
  67         for (j = 0; receivers[j].name; j++) {
  68                 const char *name = receivers[j].name;
  69                 size_t len = strlen(name);
  70                 char c;
  71                 if (strlen(ra) < len)
  72                         continue;
  73                 if (strncmp(name, ra, len))
  74                         continue;
  75                 c = ra[len];
  76                 if (c && c != ' ')
  77                         continue;
  78                 if (c && !receivers[j].parse_config)
  79                         return NULL;
  80                 *receiver_num = j;
  81                 return parse_receiver_args(j, c? ra + len + 1: NULL);
  82         }
  83         PARA_ERROR_LOG("receiver not found\n");
  84         return NULL;
  85 }