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"
33 #define INBUF_SIZE 32 * 1024
35 static struct stdin_task stdin_task_struct
;
36 static struct stdin_task
*sit
= &stdin_task_struct
;
37 static struct filter_chain filter_chain_struct
;
38 static struct filter_chain
*fc
= &filter_chain_struct
;
39 static struct stdout_task stdout_task_struct
;
40 static struct stdout_task
*sot
= &stdout_task_struct
;
42 struct gengetopt_args_info conf
;
44 __printf_2_3
void para_log(int ll
, const char* fmt
,...)
48 /* ignore log message if loglevel is not high enough */
49 if (ll
< conf
.loglevel_arg
)
52 vfprintf(stderr
, fmt
, argp
);
56 void filter_event_handler(struct task
*t
)
58 PARA_NOTICE_LOG("%s\n", PARA_STRERROR(-t
->ret
));
62 static void open_filters(void)
64 struct filter_node
*fn
;
66 list_for_each_entry(fn
, &fc
->filters
, node
) {
68 PARA_INFO_LOG("opened %s filter\n", fn
->filter
->name
);
70 fc
->out_loaded
= &fn
->loaded
;
75 static int init_filter_chain(void)
78 struct filter_node
*fn
;
80 INIT_LIST_HEAD(&fc
->filters
);
83 fc
->in_loaded
= &sit
->loaded
;
84 fc
->input_eof
= &sit
->eof
;
86 fc
->output_eof
= &sot
->eof
;
87 fc
->task
.private_data
= fc
;
88 fc
->task
.pre_select
= filter_pre_select
;
89 fc
->task
.event_handler
= filter_event_handler
;
90 sprintf(fc
->task
.status
, "filter chain");
92 for (i
= 0; i
< conf
.filter_given
; i
++) {
93 char *fa
= conf
.filter_arg
[i
];
94 fn
= para_calloc(sizeof(struct filter_node
));
95 filter_num
= check_filter_arg(fa
, &fn
->conf
);
101 INIT_LIST_HEAD(&fn
->callbacks
);
102 fn
->filter
= &filters
[filter_num
];
103 PARA_DEBUG_LOG("adding %s to filter chain\n", fn
->filter
->name
);
104 list_add_tail(&fn
->node
, &fc
->filters
);
106 if (list_empty(&fc
->filters
))
107 return -E_NO_FILTERS
;
112 static int parse_config(int argc
, char *argv
[])
114 static char *cf
; /* config file */
118 if (cmdline_parser(argc
, argv
, &conf
))
119 return -E_FILTER_SYNTAX
;
121 char *home
= para_homedir();
122 cf
= make_message("%s/.paraslash/filter.conf", home
);
125 if (!stat(cf
, &statbuf
)) {
126 if (cmdline_parser_configfile(cf
, &conf
, 0, 0, 0))
127 return -E_FILTER_SYNTAX
;
129 if (!conf
.list_filters_given
)
131 printf("available filters: ");
132 for (i
= 0; filters
[i
].name
; i
++)
133 printf("%s%s%s", i
? " " : "", filters
[i
].name
,
134 filters
[i
].parse_config
? "*": "");
135 printf("\nFilters marked with \"*\" have further command line options. Try\n"
136 "\tpara_filter -f '<filtername> -h'\nfor more information.\n");
140 int main(int argc
, char *argv
[])
146 stdin_set_defaults(sit
);
147 sit
->buf
= para_malloc(sit
->bufsize
),
149 filter_init(filters
);
150 ret
= parse_config(argc
, argv
);
153 ret
= init_filter_chain();
157 stdout_set_defaults(sot
);
158 PARA_EMERG_LOG("fc->output_eof: %d\n", *fc
->output_eof
);
159 sot
->buf
= fc
->outbuf
;
160 sot
->loaded
= fc
->out_loaded
;
161 sot
->input_eof
= &fc
->eof
;
163 register_task(&sot
->task
);
164 register_task(&fc
->task
);
165 register_task(&sit
->task
);
166 s
.default_timeout
.tv_sec
= 1;
167 s
.default_timeout
.tv_usec
= 0;
168 PARA_EMERG_LOG("fc->output_eof: %d\n", *fc
->output_eof
);
174 PARA_EMERG_LOG("%s\n", PARA_STRERROR(-ret
));
175 return ret
< 0? EXIT_FAILURE
: EXIT_SUCCESS
;