2 * Copyright (C) 2005-2011 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. */
13 #include "filter.cmdline.h"
17 #include "buffer_tree.h"
25 /** The list of all status items used by para_{server,audiod,gui}. */
26 const char *status_item_list[] = {STATUS_ITEM_ARRAY};
28 char *stat_item_values[NUM_STAT_ITEMS] = {NULL};
30 /** Initialize the array of errors for para_filter. */
33 /** The task that reads from stdin. */
34 static struct stdin_task stdin_task_struct;
35 /** pointer to the stdin task. */
36 static struct stdin_task *sit = &stdin_task_struct;
38 /** The task that writes converted data to stdout. */
39 static struct stdout_task stdout_task_struct;
40 /** Pointer to the stdout task. */
41 static struct stdout_task *sot = &stdout_task_struct;
43 /** Gengetopt struct that holds the command line args. */
44 static struct filter_args_info conf;
47 INIT_STDERR_LOGGING(loglevel);
49 __noreturn static void print_help_and_die(void)
51 int d = conf.detailed_help_given;
52 const char **p = d? filter_args_info_detailed_help
53 : filter_args_info_help;
55 printf_or_die("%s\n\n", FILTER_CMDLINE_PARSER_PACKAGE "-"
56 FILTER_CMDLINE_PARSER_VERSION);
57 printf_or_die("%s\n\n", filter_args_info_usage);
59 printf_or_die("%s\n", *p);
60 print_filter_helps(d);
64 static int parse_config(int argc, char *argv[])
66 static char *cf; /* config file */
69 if (filter_cmdline_parser(argc, argv, &conf))
70 return -E_FILTER_SYNTAX;
71 HANDLE_VERSION_FLAG("filter", conf);
72 if (conf.help_given || conf.detailed_help_given)
74 loglevel = get_loglevel_by_name(conf.loglevel_arg);
76 char *home = para_homedir();
77 cf = make_message("%s/.paraslash/filter.conf", home);
80 if (!stat(cf, &statbuf)) {
81 struct filter_cmdline_parser_params params = {
88 if (filter_cmdline_parser_config_file(cf, &conf, ¶ms))
89 return -E_FILTER_SYNTAX;
91 if (!conf.filter_given)
97 * The main function of para_filter.
99 * Para_filter reads data from stdin, converts it by using a chain
100 * of filters (specified on the command line) and writes the resulting
103 * \param argc Number of command line options.
104 * \param argv Vector of arguments.
106 * \return \a EXIT_SUCCESS on success, EXIT_FAILURE on errors.
108 int main(int argc, char *argv[])
110 static struct sched s;
113 struct btr_node *parent;
114 struct filter_node **fns;
117 ret = parse_config(argc, argv);
120 sit->btrn = btr_new_node(&(struct btr_node_description)
121 EMBRACE(.name = "stdin"));
122 stdin_set_defaults(sit);
123 register_task(&sit->task);
125 fns = para_malloc(conf.filter_given * sizeof(*fns));
126 for (i = 0, parent = sit->btrn; i < conf.filter_given; i++) {
127 char *fa = conf.filter_arg[i];
128 struct filter_node *fn;
130 fn = fns[i] = para_calloc(sizeof(*fn));
131 ret = check_filter_arg(fa, &fn->conf);
136 fn->filter_num = ret;
137 f = filters + fn->filter_num;
138 sprintf(fn->task.status, "%s", f->name);
139 PARA_DEBUG_LOG("filter #%d: %s\n", i, f->name);
140 fn->btrn = btr_new_node(&(struct btr_node_description)
141 EMBRACE(.name = f->name, .parent = parent,
142 .handler = f->execute, .context = fn));
143 fn->task.pre_select = f->pre_select;
144 fn->task.post_select = f->post_select;
146 register_task(&fn->task);
149 sot->btrn = btr_new_node(&(struct btr_node_description)
150 EMBRACE(.name = "stdout", .parent = parent));
151 stdout_set_defaults(sot);
152 register_task(&sot->task);
154 s.default_timeout.tv_sec = 1;
155 s.default_timeout.tv_usec = 0;
156 btr_log_tree(sit->btrn, LL_INFO);
159 for (i--; i >= 0; i--) {
160 struct filter_node *fn = fns[i];
162 f = filters + fn->filter_num;
165 btr_free_node(fn->btrn);
170 btr_free_node(sit->btrn);
171 btr_free_node(sot->btrn);
174 PARA_EMERG_LOG("%s\n", para_strerror(-ret));
175 exit(ret < 0? EXIT_FAILURE : EXIT_SUCCESS);