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 <regex.h>
  10
  11 #include "para.h"
  12 #include "list.h"
  13 #include "sched.h"
  14 #include "ggo.h"
  15 #include "recv.h"
  16 #include "string.h"
  17
  18 DEFINE_RECEIVER_ARRAY;
  19
  20 /**
  21  * Call the init function of each paraslash receiver.
  22  */
  23 void recv_init(void)
  24 {
  25         int i;
  26
  27         FOR_EACH_RECEIVER(i)
  28                 receivers[i].init(&receivers[i]);
  29 }
  30
  31 static void *parse_receiver_args(int receiver_num, char *options)
  32 {
  33         struct receiver *r = &receivers[receiver_num];
  34         char **argv;
  35         int argc, i;
  36         void *conf;
  37
  38
  39         PARA_DEBUG_LOG("%s, options: %s\n", r->name,
  40                 options? options : "(none)");
  41         if (options) {
  42                 PARA_DEBUG_LOG("options: %s\n", options);
  43                 argc = create_argv(options, " \t", &argv);
  44                 if (argc < 0)
  45                         return NULL;
  46                 for (i = argc - 1; i >= 0; i--)
  47                         argv[i + 1] = argv[i];
  48                 argv[0] = NULL;
  49                 argc++;
  50         } else {
  51                 argc = 1;
  52                 argv = para_malloc(2 * sizeof(char*));
  53                 argv[0] = NULL;
  54                 argv[1] = NULL;
  55         }
  56         conf = r->parse_config(argc, argv);
  57         for (i = 1; i < argc; i++)
  58                 free(argv[i]);
  59         free(argv);
  60         return conf;
  61 }
  62
  63 /**
  64  * check if given string is a valid command line for any receiver
  65  *
  66  * \param \ra string of the form receiver_name:options
  67  * \param receiver_num contains the number of the receiver upon success
  68  *
  69  * This function checks whether \a ra starts with the name of a supported
  70  * paraslash receiver, optinally followed by a colon and any options for that
  71  * receiver. If a valid receiver name was found and further are present, the
  72  * remaining part of \a ra is passed to that receiver's config parser.
  73  *
  74  * \return On success, a pointer to the gengetopt args info struct is returned
  75  * and \a receiver_num contains the number of the receiver. Otherwise this function
  76  * returns \p NULL.
  77  */
  78 void *check_receiver_arg(char *ra, int *receiver_num)
  79 {
  80         int j;
  81
  82         PARA_DEBUG_LOG("checking %s\n", ra);
  83         for (j = 0; receivers[j].name; j++) {
  84                 const char *name = receivers[j].name;
  85                 size_t len = strlen(name);
  86                 char c;
  87                 if (strlen(ra) < len)
  88                         continue;
  89                 if (strncmp(name, ra, len))
  90                         continue;
  91                 c = ra[len];
  92                 if (c && c != ' ')
  93                         continue;
  94                 if (c && !receivers[j].parse_config)
  95                         return NULL;
  96                 *receiver_num = j;
  97                 return parse_receiver_args(j, c? ra + len + 1: NULL);
  98         }
  99         PARA_ERROR_LOG("receiver not found\n");
 100         return NULL;
 101 }
 102
 103 /**
 104  * Print out the help texts to all receivers.
 105  *
 106  * \param detailed Whether the detailed help should be printed.
 107  */
 108 void print_receiver_helps(int detailed)
 109 {
 110         int i;
 111
 112         printf_or_die("\nAvailable receivers: \n\t");
 113         FOR_EACH_RECEIVER(i)
 114                 printf_or_die("%s%s", i? " " : "", receivers[i].name);
 115         printf_or_die("\n\n");
 116         FOR_EACH_RECEIVER(i) {
 117                 struct receiver *r = receivers + i;
 118                 if (!r->help.short_help)
 119                         continue;
 120                 printf_or_die("Options for %s:\n", r->name);
 121                 ggo_print_help(&r->help, detailed);
 122         }
 123 }