2 * Copyright (C) 2005-2009 Andre Noll <maan@systemlinux.org>
4 * Licensed under the GPL v2. For licencing details see COPYING.
7 /** \file filter.c The stand-alone filter program. */
12 #include "filter.cmdline.h"
22 /** The list of all status items used by para_{server,audiod,gui}. */
23 const char *status_item_list[] = {STATUS_ITEM_ARRAY};
25 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
27 /** Initialize the array of errors for para_filter. */
30 /** The task that reads from stdin. */
31 static struct stdin_task stdin_task_struct;
32 /** pointer to the stdin task. */
33 static struct stdin_task *sit = &stdin_task_struct;
35 /** The task that filters the data. */
36 static struct filter_chain filter_chain_struct;
37 /** Pointer to the filter chain. */
38 static struct filter_chain *fc = &filter_chain_struct;
40 /** The task that writes converted data to stdout. */
41 static struct stdout_task stdout_task_struct;
42 /** Pointer to the stdout task. */
43 static struct stdout_task *sot = &stdout_task_struct;
45 /** Gengetopt struct that holds the command line args. */
46 static struct filter_args_info conf;
49 INIT_STDERR_LOGGING(loglevel);
51 static void open_filters(void)
54 struct filter_node *fn;
56 FOR_EACH_FILTER_NODE(fn, fc, i) {
57 struct filter *f = filters + fn->filter_num;
59 PARA_INFO_LOG("opened %s filter\n", f->name);
60 fc->outbufp = &fn->buf;
61 fc->out_loaded = &fn->loaded;
65 static int init_filter_chain(void)
68 struct filter_node *fn;
70 if (!conf.filter_given)
72 fc->num_filters = conf.filter_given;
73 fc->filter_nodes = para_malloc(fc->num_filters * sizeof(struct filter_node));
74 fc->inbufp = &sit->buf;
75 fc->in_loaded = &sit->loaded;
76 fc->input_error = &sit->task.error;
78 fc->output_error = &sot->task.error;
79 fc->task.pre_select = filter_pre_select;
80 sprintf(fc->task.status, "filter chain");
82 FOR_EACH_FILTER_NODE(fn, fc, i) {
83 char *fa = conf.filter_arg[i];
84 fn = fc->filter_nodes + i;
85 ret = check_filter_arg(fa, &fn->conf);
90 INIT_LIST_HEAD(&fn->callbacks);
91 PARA_DEBUG_LOG("filter #%d: %s\n", i, filters[fn->filter_num].name);
96 free(fc->filter_nodes);
100 __noreturn static void print_help_and_die(void)
102 int d = conf.detailed_help_given;
103 const char **p = d? filter_args_info_detailed_help
104 : filter_args_info_help;
106 printf_or_die("%s\n\n", FILTER_CMDLINE_PARSER_PACKAGE "-"
107 FILTER_CMDLINE_PARSER_VERSION);
108 printf_or_die("%s\n\n", filter_args_info_usage);
110 printf_or_die("%s\n", *p);
111 print_filter_helps(d);
115 static int parse_config(int argc, char *argv[])
117 static char *cf; /* config file */
120 if (filter_cmdline_parser(argc, argv, &conf))
121 return -E_FILTER_SYNTAX;
122 HANDLE_VERSION_FLAG("filter", conf);
123 if (conf.help_given || conf.detailed_help_given)
124 print_help_and_die();
126 char *home = para_homedir();
127 cf = make_message("%s/.paraslash/filter.conf", home);
130 if (!stat(cf, &statbuf)) {
131 struct filter_cmdline_parser_params params = {
137 if (filter_cmdline_parser_config_file(cf, &conf, ¶ms))
138 return -E_FILTER_SYNTAX;
144 * The main function of para_filter.
146 * Para_filter reads data from stdin, converts it by using a chain
147 * of filters (specified on the command line) and writes the resulting
150 * \param argc Number of command line options.
151 * \param argv Vector of arguments.
153 * \return \a EXIT_SUCCESS on success, EXIT_FAILURE on errors.
155 int main(int argc, char *argv[])
158 static struct sched s;
160 stdin_set_defaults(sit);
161 sit->buf = para_malloc(sit->bufsize),
164 ret = parse_config(argc, argv);
167 loglevel = get_loglevel_by_name(conf.loglevel_arg);
168 ret = init_filter_chain();
171 sit->output_error = &fc->task.error;
173 stdout_set_defaults(sot);
174 sot->bufp = fc->outbufp;
175 sot->loaded = fc->out_loaded;
176 sot->input_error = &fc->task.error;
178 register_task(&sit->task);
179 register_task(&fc->task);
180 register_task(&sot->task);
181 s.default_timeout.tv_sec = 1;
182 s.default_timeout.tv_usec = 0;
188 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
189 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;