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. */
11 #include "filter.cmdline.h"
21 /** The list of all status items used by para_{server,audiod,gui}. */
22 const char *status_item_list[] = {STATUS_ITEM_ARRAY};
24 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
26 /** Initialize the array of errors for para_filter. */
29 /** The task that reads from stdin. */
30 static struct stdin_task stdin_task_struct;
31 /** pointer to the stdin task. */
32 static struct stdin_task *sit = &stdin_task_struct;
34 /** The task that filters the data. */
35 static struct filter_chain filter_chain_struct;
36 /** Pointer to the filter chain. */
37 static struct filter_chain *fc = &filter_chain_struct;
39 /** The task that writes converted data to stdout. */
40 static struct stdout_task stdout_task_struct;
41 /** Pointer to the stdout task. */
42 static struct stdout_task *sot = &stdout_task_struct;
44 /** Gengetopt struct that holds the command line args. */
45 static struct filter_args_info conf;
48 INIT_STDERR_LOGGING(loglevel);
50 static void open_filters(void)
53 struct filter_node *fn;
55 FOR_EACH_FILTER_NODE(fn, fc, i) {
56 struct filter *f = filters + fn->filter_num;
58 PARA_INFO_LOG("opened %s filter\n", f->name);
60 fc->out_loaded = &fn->loaded;
64 static int init_filter_chain(void)
67 struct filter_node *fn;
69 if (!conf.filter_given)
71 fc->num_filters = conf.filter_given;
72 fc->filter_nodes = para_malloc(fc->num_filters * sizeof(struct filter_node));
74 fc->in_loaded = &sit->loaded;
75 fc->input_error = &sit->task.error;
77 fc->output_error = &sot->task.error;
78 fc->task.pre_select = filter_pre_select;
79 sprintf(fc->task.status, "filter chain");
81 FOR_EACH_FILTER_NODE(fn, fc, i) {
82 char *fa = conf.filter_arg[i];
83 fn = fc->filter_nodes + i;
84 ret = check_filter_arg(fa, &fn->conf);
89 INIT_LIST_HEAD(&fn->callbacks);
90 PARA_DEBUG_LOG("filter #%d: %s\n", i, filters[fn->filter_num].name);
95 free(fc->filter_nodes);
99 __noreturn static void print_help_and_die(void)
101 int d = conf.detailed_help_given;
102 const char **p = d? filter_args_info_detailed_help
103 : filter_args_info_help;
105 printf_or_die("%s\n\n", FILTER_CMDLINE_PARSER_PACKAGE "-"
106 FILTER_CMDLINE_PARSER_VERSION);
107 printf_or_die("%s\n\n", filter_args_info_usage);
109 printf_or_die("%s\n", *p);
110 print_filter_helps(d);
114 static int parse_config(int argc, char *argv[])
116 static char *cf; /* config file */
119 if (filter_cmdline_parser(argc, argv, &conf))
120 return -E_FILTER_SYNTAX;
121 HANDLE_VERSION_FLAG("filter", conf);
122 if (conf.help_given || conf.detailed_help_given)
123 print_help_and_die();
125 char *home = para_homedir();
126 cf = make_message("%s/.paraslash/filter.conf", home);
129 if (!stat(cf, &statbuf)) {
130 struct filter_cmdline_parser_params params = {
136 if (filter_cmdline_parser_config_file(cf, &conf, ¶ms))
137 return -E_FILTER_SYNTAX;
143 * The main function of para_filter.
145 * Para_filter reads data from stdin, converts it by using a chain
146 * of filters (specified on the command line) and writes the resulting
149 * \param argc Number of command line options.
150 * \param argv Vector of arguments.
152 * \return \a EXIT_SUCCESS on success, EXIT_FAILURE on errors.
154 int main(int argc, char *argv[])
157 static struct sched s;
159 stdin_set_defaults(sit);
160 sit->buf = para_malloc(sit->bufsize),
163 ret = parse_config(argc, argv);
166 loglevel = get_loglevel_by_name(conf.loglevel_arg);
167 ret = init_filter_chain();
170 sit->output_error = &fc->task.error;
172 stdout_set_defaults(sot);
173 sot->buf = fc->outbuf;
174 sot->loaded = fc->out_loaded;
175 sot->input_error = &fc->task.error;
177 register_task(&sit->task);
178 register_task(&fc->task);
179 register_task(&sot->task);
180 s.default_timeout.tv_sec = 1;
181 s.default_timeout.tv_usec = 0;
187 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
188 return ret < 0? EXIT_FAILURE : EXIT_SUCCESS;