2 * Copyright (C) 2005-2006 Andre Noll <maan@systemlinux.org>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA.
18 /** \file filter.c the stand-alone filter program */
22 #include "filter.cmdline.h"
30 #define INBUF_SIZE 32 * 1024
32 static struct filter_chain_info filter_chain_info_struct;
33 static struct filter_chain_info *fci = &filter_chain_info_struct;
35 struct gengetopt_args_info conf;
37 __printf_2_3 void para_log(int ll, char* fmt,...)
41 /* ignore log message if loglevel is not high enough */
42 if (ll < conf.loglevel_arg)
45 vfprintf(stderr, fmt, argp);
53 static int init_active_filter_list(void)
56 struct filter_node *fn;
58 INIT_LIST_HEAD(&fci->filters);
61 fci->in_loaded = &loaded;
64 for (i = 0; i < conf.filter_given; i++) {
65 char *fa = para_strdup(conf.filter_arg[i]);
66 fn = para_calloc(sizeof(struct filter_node));
67 filter_num = check_filter_arg(fa, &fn->conf);
73 INIT_LIST_HEAD(&fn->callbacks);
74 fn->filter = &filters[filter_num];
75 PARA_DEBUG_LOG("adding %s to filter chain\n", fn->filter->name);
76 list_add_tail(&fn->node, &fci->filters);
78 if (list_empty(&fci->filters))
83 static void open_filters(void)
85 struct filter_node *fn;
87 list_for_each_entry(fn, &fci->filters, node) {
89 PARA_INFO_LOG("opened %s filter\n", fn->filter->name);
90 fci->outbuf = fn->buf;
91 fci->out_loaded = &fn->loaded;
95 static int parse_config(int argc, char *argv[])
97 static char *cf; /* config file */
101 if (cmdline_parser(argc, argv, &conf))
102 return -E_FILTER_SYNTAX;
104 char *home = para_homedir();
105 cf = make_message("%s/.paraslash/filter.conf", home);
108 if (!stat(cf, &statbuf)) {
109 if (cmdline_parser_configfile(cf, &conf, 0, 0, 0))
110 return -E_FILTER_SYNTAX;
112 if (!conf.list_filters_given)
114 printf("available filters: ");
115 for (i = 0; filters[i].name; i++)
116 printf("%s%s%s", i? " " : "", filters[i].name,
117 filters[i].parse_config? "*": "");
118 printf("\nFilters marked with \"*\" have further command line options. Try\n"
119 "\tpara_filter -f '<filtername> -h'\nfor more information.\n");
123 int main(int argc, char *argv[])
126 char *ib, *ob; /* input/output buffer */
127 size_t *il, *ol; /* number of loaded bytes in input/output buffer */
129 filter_init(filters);
130 ret = parse_config(argc, argv);
133 inbuf = para_malloc(INBUF_SIZE);
134 ret = init_active_filter_list();
141 ol = fci->out_loaded;
142 PARA_DEBUG_LOG("ib %p in, ob: %p\n", ib, ob);
144 if (*il < INBUF_SIZE && !eof) {
145 ret = read(STDIN_FILENO, ib + *il, INBUF_SIZE - *il);
146 PARA_DEBUG_LOG("read %d/%zd\n", ret, INBUF_SIZE - *il);
153 ret = filter_io(fci);
158 ret = write(STDOUT_FILENO, ob, *ol);
159 PARA_DEBUG_LOG("wrote %d/%zd\n", ret, *ol);
164 PARA_NOTICE_LOG("short write: %zd bytes left\n", *ol);
165 memmove(ob, ob + ret, *ol);
168 if (!eof || converted)
173 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret));