Kill afhi->header_offset.
[paraslash.git] / recv_common.c
1 /*
2 * Copyright (C) 2006-2011 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 #include <stdbool.h>
11
12 #include "para.h"
13 #include "list.h"
14 #include "sched.h"
15 #include "ggo.h"
16 #include "recv.h"
17 #include "string.h"
18 #include "buffer_tree.h"
19
20 DEFINE_RECEIVER_ARRAY;
21
22 /**
23 * Call the init function of each paraslash receiver.
24 */
25 void recv_init(void)
26 {
27 int i;
28
29 FOR_EACH_RECEIVER(i)
30 receivers[i].init(&receivers[i]);
31 }
32
33 static void *parse_receiver_args(int receiver_num, char *options)
34 {
35 struct receiver *r = &receivers[receiver_num];
36 char **argv;
37 int argc, i;
38 void *conf;
39
40
41 PARA_DEBUG_LOG("%s, options: %s\n", r->name,
42 options? options : "(none)");
43 if (options) {
44 PARA_DEBUG_LOG("options: %s\n", options);
45 argc = create_argv(options, " \t", &argv);
46 if (argc < 0)
47 return NULL;
48 for (i = argc - 1; i >= 0; i--)
49 argv[i + 1] = argv[i];
50 argc++;
51 } else {
52 argc = 1;
53 argv = para_malloc(2 * sizeof(char*));
54 argv[1] = NULL;
55 }
56 argv[0] = make_message("%s_recv", r->name);
57 conf = r->parse_config(argc, argv);
58 for (i = 0; i < argc; i++)
59 free(argv[i]);
60 free(argv);
61 return conf;
62 }
63
64 /**
65 * check if given string is a valid command line for any receiver
66 *
67 * \param \ra string of the form receiver_name:options
68 * \param receiver_num contains the number of the receiver upon success
69 *
70 * This function checks whether \a ra starts with the name of a supported
71 * paraslash receiver, optinally followed by a colon and any options for that
72 * receiver. If a valid receiver name was found and further are present, the
73 * remaining part of \a ra is passed to that receiver's config parser.
74 *
75 * \return On success, a pointer to the gengetopt args info struct is returned
76 * and \a receiver_num contains the number of the receiver. Otherwise this function
77 * returns \p NULL.
78 */
79 void *check_receiver_arg(char *ra, int *receiver_num)
80 {
81 int j;
82
83 PARA_DEBUG_LOG("checking %s\n", ra);
84 for (j = 0; receivers[j].name; j++) {
85 const char *name = receivers[j].name;
86 size_t len = strlen(name);
87 char c;
88 if (strlen(ra) < len)
89 continue;
90 if (strncmp(name, ra, len))
91 continue;
92 c = ra[len];
93 if (c && c != ' ')
94 continue;
95 if (c && !receivers[j].parse_config)
96 return NULL;
97 *receiver_num = j;
98 return parse_receiver_args(j, c? ra + len + 1: NULL);
99 }
100 PARA_ERROR_LOG("receiver not found\n");
101 return NULL;
102 }
103
104 /**
105 * Print out the help texts to all receivers.
106 *
107 * \param detailed Whether the detailed help should be printed.
108 */
109 void print_receiver_helps(int detailed)
110 {
111 int i;
112
113 printf_or_die("\nAvailable receivers: \n\t");
114 FOR_EACH_RECEIVER(i)
115 printf_or_die("%s%s", i? " " : "", receivers[i].name);
116 printf_or_die("\n\n");
117 FOR_EACH_RECEIVER(i) {
118 struct receiver *r = receivers + i;
119 if (!r->help.short_help)
120 continue;
121 printf_or_die("Options for %s:\n", r->name);
122 ggo_print_help(&r->help, detailed);
123 }
124 }
125
126 int generic_recv_pre_select(struct sched *s, struct task *t)
127 {
128 struct receiver_node *rn = container_of(t, struct receiver_node, task);
129 int ret = btr_node_status(rn->btrn, 0, BTR_NT_ROOT);
130
131 t->error = 0;
132 if (ret < 0)
133 sched_min_delay(s);
134 return ret;
135 }