1 const char actions_rcs[] = "$Id: actions.c,v 1.86 2012/11/11 12:37:10 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/actions.c,v $
6 * Purpose : Declares functions to work with actions files
8 * Copyright : Written by and Copyright (C) 2001-2011 the
9 * Privoxy team. http://www.privoxy.org/
11 * Based on the Internet Junkbuster originally written
12 * by and Copyright (C) 1997 Anonymous Coders and
13 * Junkbusters Corporation. http://www.junkbusters.com
15 * This program is free software; you can redistribute it
16 * and/or modify it under the terms of the GNU General
17 * Public License as published by the Free Software
18 * Foundation; either version 2 of the License, or (at
19 * your option) any later version.
21 * This program is distributed in the hope that it will
22 * be useful, but WITHOUT ANY WARRANTY; without even the
23 * implied warranty of MERCHANTABILITY or FITNESS FOR A
24 * PARTICULAR PURPOSE. See the GNU General Public
25 * License for more details.
27 * The GNU General Public License should be included with
28 * this file. If not, you can view it at
29 * http://www.gnu.org/copyleft/gpl.html
30 * or write to the Free Software Foundation, Inc., 59
31 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
33 *********************************************************************/
43 #ifdef FEATURE_PTHREAD
59 const char actions_h_rcs[] = ACTIONS_H_VERSION;
63 * We need the main list of options.
65 * First, we need a way to tell between boolean, string, and multi-string
66 * options. For string and multistring options, we also need to be
67 * able to tell the difference between a "+" and a "-". (For bools,
68 * the "+"/"-" information is encoded in "add" and "mask"). So we use
69 * an enumerated type (well, the preprocessor equivalent). Here are
72 enum action_value_type {
73 AV_NONE = 0, /* +opt -opt */
74 AV_ADD_STRING = 1, /* +stropt{string} */
75 AV_REM_STRING = 2, /* -stropt */
76 AV_ADD_MULTI = 3, /* +multiopt{string} +multiopt{string2} */
77 AV_REM_MULTI = 4 /* -multiopt{string} -multiopt */
81 * We need a structure to hold the name, flag changes,
82 * type, and string index.
87 unsigned long mask; /* a bit set to "0" = remove action */
88 unsigned long add; /* a bit set to "1" = add action */
89 enum action_value_type value_type; /* an AV_... constant */
90 int index; /* index into strings[] or multi[] */
94 * And with those building blocks in place, here's the array.
96 static const struct action_name action_names[] =
99 * Well actually there's no data here - it's in actionlist.h
100 * This keeps it together to make it easy to change.
102 * Here's the macros used to format it:
104 #define DEFINE_ACTION_MULTI(name,index) \
105 { "+" name, ACTION_MASK_ALL, 0, AV_ADD_MULTI, index }, \
106 { "-" name, ACTION_MASK_ALL, 0, AV_REM_MULTI, index },
107 #define DEFINE_ACTION_STRING(name,flag,index) \
108 { "+" name, ACTION_MASK_ALL, flag, AV_ADD_STRING, index }, \
109 { "-" name, ~flag, 0, AV_REM_STRING, index },
110 #define DEFINE_ACTION_BOOL(name,flag) \
111 { "+" name, ACTION_MASK_ALL, flag }, \
112 { "-" name, ~flag, 0 },
113 #define DEFINE_ACTION_ALIAS 1 /* Want aliases please */
115 #include "actionlist.h"
117 #undef DEFINE_ACTION_MULTI
118 #undef DEFINE_ACTION_STRING
119 #undef DEFINE_ACTION_BOOL
120 #undef DEFINE_ACTION_ALIAS
122 { NULL, 0, 0 } /* End marker */
126 static int load_one_actions_file(struct client_state *csp, int fileid);
129 /*********************************************************************
131 * Function : merge_actions
133 * Description : Merge two actions together.
134 * Similar to "dest += src".
137 * 1 : dest = Actions to modify.
138 * 2 : src = Action to add.
140 * Returns : JB_ERR_OK or JB_ERR_MEMORY
142 *********************************************************************/
143 jb_err merge_actions (struct action_spec *dest,
144 const struct action_spec *src)
149 dest->mask &= src->mask;
150 dest->add &= src->mask;
151 dest->add |= src->add;
153 for (i = 0; i < ACTION_STRING_COUNT; i++)
155 char * str = src->string[i];
158 freez(dest->string[i]);
159 dest->string[i] = strdup_or_die(str);
163 for (i = 0; i < ACTION_MULTI_COUNT; i++)
165 if (src->multi_remove_all[i])
167 /* Remove everything from dest */
168 list_remove_all(dest->multi_remove[i]);
169 dest->multi_remove_all[i] = 1;
171 err = list_duplicate(dest->multi_add[i], src->multi_add[i]);
173 else if (dest->multi_remove_all[i])
176 * dest already removes everything, so we only need to worry
179 list_remove_list(dest->multi_add[i], src->multi_remove[i]);
180 err = list_append_list_unique(dest->multi_add[i], src->multi_add[i]);
184 /* No "remove all"s to worry about. */
185 list_remove_list(dest->multi_add[i], src->multi_remove[i]);
186 err = list_append_list_unique(dest->multi_remove[i], src->multi_remove[i]);
187 if (!err) err = list_append_list_unique(dest->multi_add[i], src->multi_add[i]);
200 /*********************************************************************
202 * Function : copy_action
204 * Description : Copy an action_specs.
205 * Similar to "dest = src".
208 * 1 : dest = Destination of copy.
209 * 2 : src = Source for copy.
211 * Returns : JB_ERR_OK or JB_ERR_MEMORY
213 *********************************************************************/
214 jb_err copy_action (struct action_spec *dest,
215 const struct action_spec *src)
218 jb_err err = JB_ERR_OK;
221 memset(dest, '\0', sizeof(*dest));
223 dest->mask = src->mask;
224 dest->add = src->add;
226 for (i = 0; i < ACTION_STRING_COUNT; i++)
228 char * str = src->string[i];
231 str = strdup_or_die(str);
232 dest->string[i] = str;
236 for (i = 0; i < ACTION_MULTI_COUNT; i++)
238 dest->multi_remove_all[i] = src->multi_remove_all[i];
239 err = list_duplicate(dest->multi_remove[i], src->multi_remove[i]);
244 err = list_duplicate(dest->multi_add[i], src->multi_add[i]);
253 /*********************************************************************
255 * Function : free_action_spec
257 * Description : Frees an action_spec and the memory used by it.
260 * 1 : src = Source to free.
264 *********************************************************************/
265 void free_action_spec(struct action_spec *src)
272 /*********************************************************************
274 * Function : free_action
276 * Description : Destroy an action_spec. Frees memory used by it,
277 * except for the memory used by the struct action_spec
281 * 1 : src = Source to free.
285 *********************************************************************/
286 void free_action (struct action_spec *src)
295 for (i = 0; i < ACTION_STRING_COUNT; i++)
297 freez(src->string[i]);
300 for (i = 0; i < ACTION_MULTI_COUNT; i++)
302 destroy_list(src->multi_remove[i]);
303 destroy_list(src->multi_add[i]);
306 memset(src, '\0', sizeof(*src));
310 /*********************************************************************
312 * Function : get_action_token
314 * Description : Parses a line for the first action.
315 * Modifies its input array, doesn't allocate memory.
317 * *line=" +abc{def} -ghi "
324 * 1 : line = [in] The line containing the action.
325 * [out] Start of next action on line, or
326 * NULL if we reached the end of line before
327 * we found an action.
328 * 2 : name = [out] Start of action name, null
329 * terminated. NULL on EOL
330 * 3 : value = [out] Start of action value, null
331 * terminated. NULL if none or EOL.
333 * Returns : JB_ERR_OK => Ok
334 * JB_ERR_PARSE => Mismatched {} (line was trashed anyway)
336 *********************************************************************/
337 jb_err get_action_token(char **line, char **name, char **value)
342 /* set default returns */
347 /* Eat any leading whitespace */
348 while ((*str == ' ') || (*str == '\t'))
360 /* null name, just value is prohibited */
367 while (((ch = *str) != '\0') &&
368 (ch != ' ') && (ch != '\t') && (ch != '{'))
372 /* error, '}' without '{' */
384 /* EOL - be careful not to run off buffer */
389 /* More to parse next time. */
398 /* The value ends with the first non-escaped closing curly brace */
399 while ((str = strchr(str, '}')) != NULL)
403 /* Overwrite the '\' so the action doesn't see it. */
404 string_move(str-1, str);
425 /*********************************************************************
427 * Function : action_used_to_be_valid
429 * Description : Checks if unrecognized actions were valid in earlier
433 * 1 : action = The string containing the action to check.
435 * Returns : True if yes, otherwise false.
437 *********************************************************************/
438 static int action_used_to_be_valid(const char *action)
440 static const char * const formerly_valid_actions[] = {
443 "send-vanilla-wafer",
445 "treat-forbidden-connects-like-blocks",
451 for (i = 0; i < SZ(formerly_valid_actions); i++)
453 if (0 == strcmpic(action, formerly_valid_actions[i]))
462 /*********************************************************************
464 * Function : get_actions
466 * Description : Parses a list of actions.
469 * 1 : line = The string containing the actions.
470 * Will be written to by this function.
471 * 2 : alias_list = Custom alias list, or NULL for none.
472 * 3 : cur_action = Where to store the action. Caller
475 * Returns : JB_ERR_OK => Ok
476 * JB_ERR_PARSE => Parse error (line was trashed anyway)
477 * nonzero => Out of memory (line was trashed anyway)
479 *********************************************************************/
480 jb_err get_actions(char *line,
481 struct action_alias * alias_list,
482 struct action_spec *cur_action)
485 init_action(cur_action);
486 cur_action->mask = ACTION_MASK_ALL;
490 char * option = NULL;
493 err = get_action_token(&line, &option, &value);
501 /* handle option in 'option' */
503 /* Check for standard action name */
504 const struct action_name * action = action_names;
506 while ((action->name != NULL) && (0 != strcmpic(action->name, option)))
510 if (action->name != NULL)
513 cur_action->mask &= action->mask;
514 cur_action->add &= action->mask;
515 cur_action->add |= action->add;
517 switch (action->value_type)
520 /* ignore any option. */
524 /* add single string. */
526 if ((value == NULL) || (*value == '\0'))
528 if (0 == strcmpic(action->name, "+block"))
531 * XXX: Temporary backwards compatibility hack.
532 * XXX: should include line number.
534 value = "No reason specified.";
535 log_error(LOG_LEVEL_ERROR,
536 "block action without reason found. This may "
537 "become a fatal error in future versions.");
544 /* FIXME: should validate option string here */
545 freez (cur_action->string[action->index]);
546 cur_action->string[action->index] = strdup(value);
547 if (NULL == cur_action->string[action->index])
549 return JB_ERR_MEMORY;
555 /* remove single string. */
557 freez (cur_action->string[action->index]);
562 /* append multi string. */
564 struct list * remove_p = cur_action->multi_remove[action->index];
565 struct list * add_p = cur_action->multi_add[action->index];
567 if ((value == NULL) || (*value == '\0'))
572 list_remove_item(remove_p, value);
573 err = enlist_unique(add_p, value, 0);
582 /* remove multi string. */
584 struct list * remove_p = cur_action->multi_remove[action->index];
585 struct list * add_p = cur_action->multi_add[action->index];
587 if ((value == NULL) || (*value == '\0')
588 || ((*value == '*') && (value[1] == '\0')))
591 * no option, or option == "*".
595 list_remove_all(remove_p);
596 list_remove_all(add_p);
597 cur_action->multi_remove_all[action->index] = 1;
601 /* Valid option - remove only 1 option */
603 if (!cur_action->multi_remove_all[action->index])
605 /* there isn't a catch-all in the remove list already */
606 err = enlist_unique(remove_p, value, 0);
612 list_remove_item(add_p, value);
617 /* Shouldn't get here unless there's memory corruption. */
624 /* try user aliases. */
625 const struct action_alias * alias = alias_list;
627 while ((alias != NULL) && (0 != strcmpic(alias->name, option)))
634 merge_actions(cur_action, alias->action);
636 else if (((size_t)2 < strlen(option)) && action_used_to_be_valid(option+1))
638 log_error(LOG_LEVEL_ERROR, "Action '%s' is no longer valid "
639 "in this Privoxy release. Ignored.", option+1);
641 else if (((size_t)2 < strlen(option)) && 0 == strcmpic(option+1, "hide-forwarded-for-headers"))
643 log_error(LOG_LEVEL_FATAL, "The action 'hide-forwarded-for-headers' "
644 "is no longer valid in this Privoxy release. "
645 "Use 'change-x-forwarded-for' instead.");
649 /* Bad action name */
651 * XXX: This is a fatal error and Privoxy will later on exit
652 * in load_one_actions_file() because of an "invalid line".
654 * It would be preferable to name the offending option in that
655 * error message, but currently there is no way to do that and
656 * we have to live with two error messages for basically the
659 log_error(LOG_LEVEL_ERROR, "Unknown action or alias: %s", option);
670 /*********************************************************************
672 * Function : init_current_action
674 * Description : Zero out an action.
677 * 1 : dest = An uninitialized current_action_spec.
681 *********************************************************************/
682 void init_current_action (struct current_action_spec *dest)
684 memset(dest, '\0', sizeof(*dest));
686 dest->flags = ACTION_MOST_COMPATIBLE;
690 /*********************************************************************
692 * Function : init_action
694 * Description : Zero out an action.
697 * 1 : dest = An uninitialized action_spec.
701 *********************************************************************/
702 void init_action (struct action_spec *dest)
704 memset(dest, '\0', sizeof(*dest));
708 /*********************************************************************
710 * Function : merge_current_action
712 * Description : Merge two actions together.
713 * Similar to "dest += src".
714 * Differences between this and merge_actions()
715 * is that this one doesn't allocate memory for
716 * strings (so "src" better be in memory for at least
717 * as long as "dest" is, and you'd better free
718 * "dest" using "free_current_action").
719 * Also, there is no mask or remove lists in dest.
720 * (If we're applying it to a URL, we don't need them)
723 * 1 : dest = Current actions, to modify.
724 * 2 : src = Action to add.
726 * Returns 0 : no error
727 * !=0 : error, probably JB_ERR_MEMORY.
729 *********************************************************************/
730 jb_err merge_current_action (struct current_action_spec *dest,
731 const struct action_spec *src)
734 jb_err err = JB_ERR_OK;
736 dest->flags &= src->mask;
737 dest->flags |= src->add;
739 for (i = 0; i < ACTION_STRING_COUNT; i++)
741 char * str = src->string[i];
744 str = strdup_or_die(str);
745 freez(dest->string[i]);
746 dest->string[i] = str;
750 for (i = 0; i < ACTION_MULTI_COUNT; i++)
752 if (src->multi_remove_all[i])
754 /* Remove everything from dest, then add src->multi_add */
755 err = list_duplicate(dest->multi[i], src->multi_add[i]);
763 list_remove_list(dest->multi[i], src->multi_remove[i]);
764 err = list_append_list_unique(dest->multi[i], src->multi_add[i]);
775 /*********************************************************************
777 * Function : update_action_bits_for_tag
779 * Description : Updates the action bits based on the action sections
780 * whose tag patterns match a provided tag.
783 * 1 : csp = Current client state (buffers, headers, etc...)
784 * 2 : tag = The tag on which the update should be based on
786 * Returns : 0 if no tag matched, or
789 *********************************************************************/
790 int update_action_bits_for_tag(struct client_state *csp, const char *tag)
792 struct file_list *fl;
793 struct url_actions *b;
799 assert(list_contains_item(csp->tags, tag));
801 /* Run through all action files, */
802 for (i = 0; i < MAX_AF_FILES; i++)
804 if (((fl = csp->actions_list[i]) == NULL) || ((b = fl->f) == NULL))
806 /* Skip empty files */
810 /* and through all the action patterns, */
811 for (b = b->next; NULL != b; b = b->next)
813 /* skip the URL patterns, */
814 if (NULL == b->url->tag_regex)
819 /* and check if one of the tag patterns matches the tag, */
820 if (0 == regexec(b->url->tag_regex, tag, 0, NULL, 0))
822 /* if it does, update the action bit map, */
823 if (merge_current_action(csp->action, b->action))
825 log_error(LOG_LEVEL_ERROR,
826 "Out of memory while changing action bits");
828 /* and signal the change. */
838 /*********************************************************************
840 * Function : free_current_action
842 * Description : Free memory used by a current_action_spec.
843 * Does not free the current_action_spec itself.
846 * 1 : src = Source to free.
850 *********************************************************************/
851 void free_current_action(struct current_action_spec *src)
855 for (i = 0; i < ACTION_STRING_COUNT; i++)
857 freez(src->string[i]);
860 for (i = 0; i < ACTION_MULTI_COUNT; i++)
862 destroy_list(src->multi[i]);
865 memset(src, '\0', sizeof(*src));
869 static struct file_list *current_actions_file[MAX_AF_FILES] = {
870 NULL, NULL, NULL, NULL, NULL,
871 NULL, NULL, NULL, NULL, NULL
875 #ifdef FEATURE_GRACEFUL_TERMINATION
876 /*********************************************************************
878 * Function : unload_current_actions_file
880 * Description : Unloads current actions file - reset to state at
881 * beginning of program.
887 *********************************************************************/
888 void unload_current_actions_file(void)
892 for (i = 0; i < MAX_AF_FILES; i++)
894 if (current_actions_file[i])
896 current_actions_file[i]->unloader = unload_actions_file;
897 current_actions_file[i] = NULL;
901 #endif /* FEATURE_GRACEFUL_TERMINATION */
904 /*********************************************************************
906 * Function : unload_actions_file
908 * Description : Unloads an actions module.
911 * 1 : file_data = the data structure associated with the
916 *********************************************************************/
917 void unload_actions_file(void *file_data)
919 struct url_actions * next;
920 struct url_actions * cur = (struct url_actions *)file_data;
924 free_url_spec(cur->url);
925 if ((next == NULL) || (next->action != cur->action))
928 * As the action settings might be shared,
929 * we can only free them if the current
930 * url pattern is the last one, or if the
931 * next one is using different settings.
933 free_action_spec(cur->action);
941 /*********************************************************************
943 * Function : free_alias_list
945 * Description : Free memory used by a list of aliases.
948 * 1 : alias_list = Linked list to free.
952 *********************************************************************/
953 void free_alias_list(struct action_alias *alias_list)
955 while (alias_list != NULL)
957 struct action_alias * next = alias_list->next;
958 alias_list->next = NULL;
959 freez(alias_list->name);
960 free_action(alias_list->action);
967 /*********************************************************************
969 * Function : load_action_files
971 * Description : Read and parse all the action files and add to files
975 * 1 : csp = Current client state (buffers, headers, etc...)
977 * Returns : 0 => Ok, everything else is an error.
979 *********************************************************************/
980 int load_action_files(struct client_state *csp)
985 for (i = 0; i < MAX_AF_FILES; i++)
987 if (csp->config->actions_file[i])
989 result = load_one_actions_file(csp, i);
995 else if (current_actions_file[i])
997 current_actions_file[i]->unloader = unload_actions_file;
998 current_actions_file[i] = NULL;
1006 /*********************************************************************
1008 * Function : referenced_filters_are_missing
1010 * Description : Checks if any filters of a certain type referenced
1011 * in an action spec are missing.
1014 * 1 : csp = Current client state (buffers, headers, etc...)
1015 * 2 : cur_action = The action spec to check.
1016 * 3 : multi_index = The index where to look for the filter.
1017 * 4 : filter_type = The filter type the caller is interested in.
1019 * Returns : 0 => All referenced filters exists, everything else is an error.
1021 *********************************************************************/
1022 static int referenced_filters_are_missing(const struct client_state *csp,
1023 const struct action_spec *cur_action, int multi_index, enum filter_type filter_type)
1026 struct file_list *fl;
1027 struct re_filterfile_spec *b;
1028 struct list_entry *filtername;
1030 for (filtername = cur_action->multi_add[multi_index]->first;
1031 filtername; filtername = filtername->next)
1033 int filter_found = 0;
1034 for (i = 0; i < MAX_AF_FILES; i++)
1037 if ((NULL == fl) || (NULL == fl->f))
1042 for (b = fl->f; b; b = b->next)
1044 if (b->type != filter_type)
1048 if (strcmp(b->name, filtername->str) == 0)
1056 log_error(LOG_LEVEL_ERROR, "Missing filter '%s'", filtername->str);
1066 /*********************************************************************
1068 * Function : action_spec_is_valid
1070 * Description : Should eventually figure out if an action spec
1071 * is valid, but currently only checks that the
1072 * referenced filters are accounted for.
1075 * 1 : csp = Current client state (buffers, headers, etc...)
1076 * 2 : cur_action = The action spec to check.
1078 * Returns : 0 => No problems detected, everything else is an error.
1080 *********************************************************************/
1081 static int action_spec_is_valid(struct client_state *csp, const struct action_spec *cur_action)
1085 enum filter_type filter_type;
1087 {ACTION_MULTI_FILTER, FT_CONTENT_FILTER},
1088 {ACTION_MULTI_CLIENT_HEADER_FILTER, FT_CLIENT_HEADER_FILTER},
1089 {ACTION_MULTI_SERVER_HEADER_FILTER, FT_SERVER_HEADER_FILTER},
1090 {ACTION_MULTI_CLIENT_HEADER_TAGGER, FT_CLIENT_HEADER_TAGGER},
1091 {ACTION_MULTI_SERVER_HEADER_TAGGER, FT_SERVER_HEADER_TAGGER}
1096 for (i = 0; i < SZ(filter_map); i++)
1098 errors += referenced_filters_are_missing(csp, cur_action,
1099 filter_map[i].multi_index, filter_map[i].filter_type);
1107 /*********************************************************************
1109 * Function : load_one_actions_file
1111 * Description : Read and parse a action file and add to files
1115 * 1 : csp = Current client state (buffers, headers, etc...)
1116 * 2 : fileid = File index to load.
1118 * Returns : 0 => Ok, everything else is an error.
1120 *********************************************************************/
1121 static int load_one_actions_file(struct client_state *csp, int fileid)
1126 * Note: Keep these in the order they occur in the file, they are
1127 * sometimes tested with <=
1130 MODE_START_OF_FILE = 1,
1132 MODE_DESCRIPTION = 3,
1138 struct url_actions *last_perm;
1139 struct url_actions *perm;
1141 struct file_list *fs;
1142 struct action_spec * cur_action = NULL;
1143 int cur_action_used = 0;
1144 struct action_alias * alias_list = NULL;
1145 unsigned long linenum = 0;
1146 mode = MODE_START_OF_FILE;
1148 if (!check_file_changed(current_actions_file[fileid], csp->config->actions_file[fileid], &fs))
1150 /* No need to load */
1151 csp->actions_list[fileid] = current_actions_file[fileid];
1156 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': %E. "
1157 "Note that beginning with Privoxy 3.0.7, actions files have to be specified "
1158 "with their complete file names.", csp->config->actions_file[fileid]);
1159 return 1; /* never get here */
1162 fs->f = last_perm = (struct url_actions *)zalloc(sizeof(*last_perm));
1163 if (last_perm == NULL)
1165 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': out of memory!",
1166 csp->config->actions_file[fileid]);
1167 return 1; /* never get here */
1170 if ((fp = fopen(csp->config->actions_file[fileid], "r")) == NULL)
1172 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': error opening file: %E",
1173 csp->config->actions_file[fileid]);
1174 return 1; /* never get here */
1177 log_error(LOG_LEVEL_INFO, "Loading actions file: %s", csp->config->actions_file[fileid]);
1179 while (read_config_line(fp, &linenum, &buf) != NULL)
1183 /* It's a header block */
1186 /* It's {{settings}} or {{alias}} */
1187 size_t len = strlen(buf);
1188 char * start = buf + 2;
1189 char * end = buf + len - 1;
1190 if ((len < (size_t)5) || (*end-- != '}') || (*end-- != '}'))
1194 log_error(LOG_LEVEL_FATAL,
1195 "can't load actions file '%s': invalid line (%lu): %s",
1196 csp->config->actions_file[fileid], linenum, buf);
1197 return 1; /* never get here */
1200 /* Trim leading and trailing whitespace. */
1208 log_error(LOG_LEVEL_FATAL,
1209 "can't load actions file '%s': invalid line (%lu): {{ }}",
1210 csp->config->actions_file[fileid], linenum);
1211 return 1; /* never get here */
1215 * An actionsfile can optionally contain the following blocks.
1216 * They *MUST* be in this order, to simplify processing:
1222 * ...free text, format TBD, but no line may start with a '{'...
1227 * The actual actions must be *after* these special blocks.
1228 * None of these special blocks may be repeated.
1231 if (0 == strcmpic(start, "settings"))
1233 /* it's a {{settings}} block */
1234 if (mode >= MODE_SETTINGS)
1236 /* {{settings}} must be first thing in file and must only
1240 log_error(LOG_LEVEL_FATAL,
1241 "can't load actions file '%s': line %lu: {{settings}} must only appear once, and it must be before anything else.",
1242 csp->config->actions_file[fileid], linenum);
1244 mode = MODE_SETTINGS;
1246 else if (0 == strcmpic(start, "description"))
1248 /* it's a {{description}} block */
1249 if (mode >= MODE_DESCRIPTION)
1251 /* {{description}} is a singleton and only {{settings}} may proceed it
1254 log_error(LOG_LEVEL_FATAL,
1255 "can't load actions file '%s': line %lu: {{description}} must only appear once, and only a {{settings}} block may be above it.",
1256 csp->config->actions_file[fileid], linenum);
1258 mode = MODE_DESCRIPTION;
1260 else if (0 == strcmpic(start, "alias"))
1262 /* it's an {{alias}} block */
1263 if (mode >= MODE_ALIAS)
1265 /* {{alias}} must be first thing in file, possibly after
1266 * {{settings}} and {{description}}
1268 * {{alias}} must only appear once.
1270 * Note that these are new restrictions introduced in
1271 * v2.9.10 in order to make actionsfile editing simpler.
1272 * (Otherwise, reordering actionsfile entries without
1273 * completely rewriting the file becomes non-trivial)
1276 log_error(LOG_LEVEL_FATAL,
1277 "can't load actions file '%s': line %lu: {{alias}} must only appear once, and it must be before all actions.",
1278 csp->config->actions_file[fileid], linenum);
1284 /* invalid {{something}} block */
1286 log_error(LOG_LEVEL_FATAL,
1287 "can't load actions file '%s': invalid line (%lu): {{%s}}",
1288 csp->config->actions_file[fileid], linenum, start);
1289 return 1; /* never get here */
1294 /* It's an actions block */
1300 mode = MODE_ACTIONS;
1302 /* free old action */
1305 if (!cur_action_used)
1307 free_action_spec(cur_action);
1311 cur_action_used = 0;
1312 cur_action = (struct action_spec *)zalloc(sizeof(*cur_action));
1313 if (cur_action == NULL)
1316 log_error(LOG_LEVEL_FATAL,
1317 "can't load actions file '%s': out of memory",
1318 csp->config->actions_file[fileid]);
1319 return 1; /* never get here */
1321 init_action(cur_action);
1324 * Copy the buffer before messing with it as we may need the
1325 * unmodified version in for the fatal error messages. Given
1326 * that this is not a common event, we could instead simply
1327 * read the line again.
1329 * buf + 1 to skip the leading '{'
1331 actions_buf = strdup_or_die(buf + 1);
1333 /* check we have a trailing } and then trim it */
1334 end = actions_buf + strlen(actions_buf) - 1;
1340 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': "
1341 "Missing trailing '}' in action section starting at line (%lu): %s",
1342 csp->config->actions_file[fileid], linenum, buf);
1343 return 1; /* never get here */
1347 /* trim any whitespace immediately inside {} */
1350 if (get_actions(actions_buf, alias_list, cur_action))
1355 log_error(LOG_LEVEL_FATAL, "can't load actions file '%s': "
1356 "can't completely parse the action section starting at line (%lu): %s",
1357 csp->config->actions_file[fileid], linenum, buf);
1358 return 1; /* never get here */
1361 if (action_spec_is_valid(csp, cur_action))
1363 log_error(LOG_LEVEL_ERROR, "Invalid action section in file '%s', "
1364 "starting at line %lu: %s",
1365 csp->config->actions_file[fileid], linenum, buf);
1371 else if (mode == MODE_SETTINGS)
1374 * Part of the {{settings}} block.
1375 * For now only serves to check if the file's minimum Privoxy
1376 * version requirement is met, but we may want to read & check
1377 * permissions when we go multi-user.
1379 if (!strncmp(buf, "for-privoxy-version=", 20))
1381 char *version_string, *fields[3];
1384 version_string = strdup_or_die(buf + 20);
1386 num_fields = ssplit(version_string, ".", fields, SZ(fields));
1388 if (num_fields < 1 || atoi(fields[0]) == 0)
1390 log_error(LOG_LEVEL_ERROR,
1391 "While loading actions file '%s': invalid line (%lu): %s",
1392 csp->config->actions_file[fileid], linenum, buf);
1394 else if ( (atoi(fields[0]) > VERSION_MAJOR)
1395 || ((num_fields > 1) && (atoi(fields[1]) > VERSION_MINOR))
1396 || ((num_fields > 2) && (atoi(fields[2]) > VERSION_POINT)))
1399 log_error(LOG_LEVEL_FATAL,
1400 "Actions file '%s', line %lu requires newer Privoxy version: %s",
1401 csp->config->actions_file[fileid], linenum, buf);
1402 return 1; /* never get here */
1404 free(version_string);
1407 else if (mode == MODE_DESCRIPTION)
1410 * Part of the {{description}} block.
1414 else if (mode == MODE_ALIAS)
1419 char actions_buf[BUFFER_SIZE];
1420 struct action_alias * new_alias;
1422 char * start = strchr(buf, '=');
1425 if ((start == NULL) || (start == buf))
1427 log_error(LOG_LEVEL_FATAL,
1428 "can't load actions file '%s': invalid alias line (%lu): %s",
1429 csp->config->actions_file[fileid], linenum, buf);
1430 return 1; /* never get here */
1433 if ((new_alias = zalloc(sizeof(*new_alias))) == NULL)
1436 log_error(LOG_LEVEL_FATAL,
1437 "can't load actions file '%s': out of memory!",
1438 csp->config->actions_file[fileid]);
1439 return 1; /* never get here */
1442 /* Eat any the whitespace before the '=' */
1444 while ((*end == ' ') || (*end == '\t'))
1447 * we already know we must have at least 1 non-ws char
1448 * at start of buf - no need to check
1454 /* Eat any the whitespace after the '=' */
1456 while ((*start == ' ') || (*start == '\t'))
1462 log_error(LOG_LEVEL_FATAL,
1463 "can't load actions file '%s': invalid alias line (%lu): %s",
1464 csp->config->actions_file[fileid], linenum, buf);
1465 return 1; /* never get here */
1468 new_alias->name = strdup_or_die(buf);
1470 strlcpy(actions_buf, start, sizeof(actions_buf));
1472 if (get_actions(actions_buf, alias_list, new_alias->action))
1476 log_error(LOG_LEVEL_FATAL,
1477 "can't load actions file '%s': invalid alias line (%lu): %s = %s",
1478 csp->config->actions_file[fileid], linenum, buf, start);
1479 return 1; /* never get here */
1483 new_alias->next = alias_list;
1484 alias_list = new_alias;
1486 else if (mode == MODE_ACTIONS)
1488 /* it's an URL pattern */
1490 /* allocate a new node */
1491 if ((perm = zalloc(sizeof(*perm))) == NULL)
1494 log_error(LOG_LEVEL_FATAL,
1495 "can't load actions file '%s': out of memory!",
1496 csp->config->actions_file[fileid]);
1497 return 1; /* never get here */
1500 perm->action = cur_action;
1501 cur_action_used = 1;
1503 /* Save the URL pattern */
1504 if (create_url_spec(perm->url, buf))
1507 log_error(LOG_LEVEL_FATAL,
1508 "can't load actions file '%s': line %lu: cannot create URL or TAG pattern from: %s",
1509 csp->config->actions_file[fileid], linenum, buf);
1510 return 1; /* never get here */
1513 /* add it to the list */
1514 last_perm->next = perm;
1517 else if (mode == MODE_START_OF_FILE)
1519 /* oops - please have a {} line as 1st line in file. */
1521 log_error(LOG_LEVEL_FATAL,
1522 "can't load actions file '%s': line %lu should begin with a '{': %s",
1523 csp->config->actions_file[fileid], linenum, buf);
1524 return 1; /* never get here */
1528 /* How did we get here? This is impossible! */
1530 log_error(LOG_LEVEL_FATAL,
1531 "can't load actions file '%s': INTERNAL ERROR - mode = %d",
1532 csp->config->actions_file[fileid], mode);
1533 return 1; /* never get here */
1540 if (!cur_action_used)
1542 free_action_spec(cur_action);
1544 free_alias_list(alias_list);
1546 /* the old one is now obsolete */
1547 if (current_actions_file[fileid])
1549 current_actions_file[fileid]->unloader = unload_actions_file;
1552 fs->next = files->next;
1554 current_actions_file[fileid] = fs;
1556 csp->actions_list[fileid] = fs;
1563 /*********************************************************************
1565 * Function : actions_to_text
1567 * Description : Converts a actionsfile entry from the internal
1568 * structure into a text line. The output is split
1569 * into one line for each action with line continuation.
1572 * 1 : action = The action to format.
1574 * Returns : A string. Caller must free it.
1575 * NULL on out-of-memory error.
1577 *********************************************************************/
1578 char * actions_to_text(const struct action_spec *action)
1580 unsigned long mask = action->mask;
1581 unsigned long add = action->add;
1582 char *result = strdup_or_die("");
1583 struct list_entry * lst;
1585 /* sanity - prevents "-feature +feature" */
1589 #define DEFINE_ACTION_BOOL(__name, __bit) \
1590 if (!(mask & __bit)) \
1592 string_append(&result, " -" __name " \\\n"); \
1594 else if (add & __bit) \
1596 string_append(&result, " +" __name " \\\n"); \
1599 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1600 if (!(mask & __bit)) \
1602 string_append(&result, " -" __name " \\\n"); \
1604 else if (add & __bit) \
1606 string_append(&result, " +" __name "{"); \
1607 string_append(&result, action->string[__index]); \
1608 string_append(&result, "} \\\n"); \
1611 #define DEFINE_ACTION_MULTI(__name, __index) \
1612 if (action->multi_remove_all[__index]) \
1614 string_append(&result, " -" __name " \\\n"); \
1618 lst = action->multi_remove[__index]->first; \
1621 string_append(&result, " -" __name "{"); \
1622 string_append(&result, lst->str); \
1623 string_append(&result, "} \\\n"); \
1627 lst = action->multi_add[__index]->first; \
1630 string_append(&result, " +" __name "{"); \
1631 string_append(&result, lst->str); \
1632 string_append(&result, "} \\\n"); \
1636 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1638 #include "actionlist.h"
1640 #undef DEFINE_ACTION_MULTI
1641 #undef DEFINE_ACTION_STRING
1642 #undef DEFINE_ACTION_BOOL
1643 #undef DEFINE_ACTION_ALIAS
1649 /*********************************************************************
1651 * Function : actions_to_html
1653 * Description : Converts a actionsfile entry from numeric form
1654 * ("mask" and "add") to a <br>-separated HTML string
1655 * in which each action is linked to its chapter in
1659 * 1 : csp = Client state (for config)
1660 * 2 : action = Action spec to be converted
1662 * Returns : A string. Caller must free it.
1663 * NULL on out-of-memory error.
1665 *********************************************************************/
1666 char * actions_to_html(const struct client_state *csp,
1667 const struct action_spec *action)
1669 unsigned long mask = action->mask;
1670 unsigned long add = action->add;
1671 char *result = strdup_or_die("");
1672 struct list_entry * lst;
1674 /* sanity - prevents "-feature +feature" */
1678 #define DEFINE_ACTION_BOOL(__name, __bit) \
1679 if (!(mask & __bit)) \
1681 string_append(&result, "\n<br>-"); \
1682 string_join(&result, add_help_link(__name, csp->config)); \
1684 else if (add & __bit) \
1686 string_append(&result, "\n<br>+"); \
1687 string_join(&result, add_help_link(__name, csp->config)); \
1690 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1691 if (!(mask & __bit)) \
1693 string_append(&result, "\n<br>-"); \
1694 string_join(&result, add_help_link(__name, csp->config)); \
1696 else if (add & __bit) \
1698 string_append(&result, "\n<br>+"); \
1699 string_join(&result, add_help_link(__name, csp->config)); \
1700 string_append(&result, "{"); \
1701 string_join(&result, html_encode(action->string[__index])); \
1702 string_append(&result, "}"); \
1705 #define DEFINE_ACTION_MULTI(__name, __index) \
1706 if (action->multi_remove_all[__index]) \
1708 string_append(&result, "\n<br>-"); \
1709 string_join(&result, add_help_link(__name, csp->config)); \
1713 lst = action->multi_remove[__index]->first; \
1716 string_append(&result, "\n<br>-"); \
1717 string_join(&result, add_help_link(__name, csp->config)); \
1718 string_append(&result, "{"); \
1719 string_join(&result, html_encode(lst->str)); \
1720 string_append(&result, "}"); \
1724 lst = action->multi_add[__index]->first; \
1727 string_append(&result, "\n<br>+"); \
1728 string_join(&result, add_help_link(__name, csp->config)); \
1729 string_append(&result, "{"); \
1730 string_join(&result, html_encode(lst->str)); \
1731 string_append(&result, "}"); \
1735 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1737 #include "actionlist.h"
1739 #undef DEFINE_ACTION_MULTI
1740 #undef DEFINE_ACTION_STRING
1741 #undef DEFINE_ACTION_BOOL
1742 #undef DEFINE_ACTION_ALIAS
1744 /* trim leading <br> */
1745 if (result && *result)
1748 result = strdup(result + 5);
1756 /*********************************************************************
1758 * Function : current_actions_to_html
1760 * Description : Converts a curren action spec to a <br> separated HTML
1761 * text in which each action is linked to its chapter in
1765 * 1 : csp = Client state (for config)
1766 * 2 : action = Current action spec to be converted
1768 * Returns : A string. Caller must free it.
1769 * NULL on out-of-memory error.
1771 *********************************************************************/
1772 char *current_action_to_html(const struct client_state *csp,
1773 const struct current_action_spec *action)
1775 unsigned long flags = action->flags;
1776 struct list_entry * lst;
1777 char *result = strdup_or_die("");
1778 char *active = strdup_or_die("");
1779 char *inactive = strdup_or_die("");
1781 #define DEFINE_ACTION_BOOL(__name, __bit) \
1782 if (flags & __bit) \
1784 string_append(&active, "\n<br>+"); \
1785 string_join(&active, add_help_link(__name, csp->config)); \
1789 string_append(&inactive, "\n<br>-"); \
1790 string_join(&inactive, add_help_link(__name, csp->config)); \
1793 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1794 if (flags & __bit) \
1796 string_append(&active, "\n<br>+"); \
1797 string_join(&active, add_help_link(__name, csp->config)); \
1798 string_append(&active, "{"); \
1799 string_join(&active, html_encode(action->string[__index])); \
1800 string_append(&active, "}"); \
1804 string_append(&inactive, "\n<br>-"); \
1805 string_join(&inactive, add_help_link(__name, csp->config)); \
1808 #define DEFINE_ACTION_MULTI(__name, __index) \
1809 lst = action->multi[__index]->first; \
1812 string_append(&inactive, "\n<br>-"); \
1813 string_join(&inactive, add_help_link(__name, csp->config)); \
1819 string_append(&active, "\n<br>+"); \
1820 string_join(&active, add_help_link(__name, csp->config)); \
1821 string_append(&active, "{"); \
1822 string_join(&active, html_encode(lst->str)); \
1823 string_append(&active, "}"); \
1828 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1830 #include "actionlist.h"
1832 #undef DEFINE_ACTION_MULTI
1833 #undef DEFINE_ACTION_STRING
1834 #undef DEFINE_ACTION_BOOL
1835 #undef DEFINE_ACTION_ALIAS
1839 string_append(&result, active);
1842 string_append(&result, "\n<br>");
1843 if (inactive != NULL)
1845 string_append(&result, inactive);
1852 /*********************************************************************
1854 * Function : action_to_line_of_text
1856 * Description : Converts a action spec to a single text line
1857 * listing the enabled actions.
1860 * 1 : action = Current action spec to be converted
1862 * Returns : A string. Caller must free it.
1863 * Out-of-memory errors are fatal.
1865 *********************************************************************/
1866 char *actions_to_line_of_text(const struct current_action_spec *action)
1869 struct list_entry *lst;
1871 const unsigned long flags = action->flags;
1873 active = strdup_or_die("");
1875 #define DEFINE_ACTION_BOOL(__name, __bit) \
1876 if (flags & __bit) \
1878 snprintf(buffer, sizeof(buffer), "+%s ", __name); \
1879 string_append(&active, buffer); \
1882 #define DEFINE_ACTION_STRING(__name, __bit, __index) \
1883 if (flags & __bit) \
1885 snprintf(buffer, sizeof(buffer), "+%s{%s} ", \
1886 __name, action->string[__index]); \
1887 string_append(&active, buffer); \
1890 #define DEFINE_ACTION_MULTI(__name, __index) \
1891 lst = action->multi[__index]->first; \
1892 while (lst != NULL) \
1894 snprintf(buffer, sizeof(buffer), "+%s{%s} ", \
1895 __name, lst->str); \
1896 string_append(&active, buffer); \
1900 #define DEFINE_ACTION_ALIAS 0 /* No aliases for output */
1902 #include "actionlist.h"
1904 #undef DEFINE_ACTION_MULTI
1905 #undef DEFINE_ACTION_STRING
1906 #undef DEFINE_ACTION_BOOL
1907 #undef DEFINE_ACTION_ALIAS
1911 log_error(LOG_LEVEL_FATAL, "Out of memory in action_to_line_of_text()");