1 const char loaders_rcs[] = "$Id: loaders.c,v 1.84 2011/07/30 15:12:55 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/loaders.c,v $
6 * Purpose : Functions to load and unload the various
7 * configuration files. Also contains code to manage
8 * the list of active loaders, and to automatically
9 * unload files that are no longer in use.
11 * Copyright : Written by and Copyright (C) 2001-2010 the
12 * Privoxy team. http://www.privoxy.org/
14 * Based on the Internet Junkbuster originally written
15 * by and Copyright (C) 1997 Anonymous Coders and
16 * Junkbusters Corporation. http://www.junkbusters.com
18 * This program is free software; you can redistribute it
19 * and/or modify it under the terms of the GNU General
20 * Public License as published by the Free Software
21 * Foundation; either version 2 of the License, or (at
22 * your option) any later version.
24 * This program is distributed in the hope that it will
25 * be useful, but WITHOUT ANY WARRANTY; without even the
26 * implied warranty of MERCHANTABILITY or FITNESS FOR A
27 * PARTICULAR PURPOSE. See the GNU General Public
28 * License for more details.
30 * The GNU General Public License should be included with
31 * this file. If not, you can view it at
32 * http://www.gnu.org/copyleft/gpl.html
33 * or write to the Free Software Foundation, Inc., 59
34 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 *********************************************************************/
43 #include <sys/types.h>
50 #if !defined(_WIN32) && !defined(__OS2__)
66 const char loaders_h_rcs[] = LOADERS_H_VERSION;
69 * Currently active files.
70 * These are also entered in the main linked list of files.
74 static struct file_list *current_trustfile = NULL;
75 #endif /* def FEATURE_TRUST */
77 static int load_one_re_filterfile(struct client_state *csp, int fileid);
79 static struct file_list *current_re_filterfile[MAX_AF_FILES] = {
80 NULL, NULL, NULL, NULL, NULL,
81 NULL, NULL, NULL, NULL, NULL
85 * Pseudo filter type for load_one_re_filterfile
87 #define NO_NEW_FILTER -1
90 /*********************************************************************
94 * Description : Basically a mark and sweep garbage collector, it is run
95 * (by the parent thread) every once in a while to reclaim memory.
97 * It uses a mark and sweep strategy:
98 * 1) mark all files as inactive
100 * 2) check with each client:
101 * if it is active, mark its files as active
102 * if it is inactive, free its resources
104 * 3) free the resources of all of the files that
105 * are still marked as inactive (and are obsolete).
107 * N.B. files that are not obsolete don't have an unloader defined.
111 * Returns : The number of threads that are still active.
113 *********************************************************************/
114 unsigned int sweep(void)
116 struct file_list *fl, *nfl;
117 struct client_state *csp;
118 struct client_states *last_active, *client_list;
120 unsigned int active_threads = 0;
122 /* clear all of the file's active flags */
123 for ( fl = files->next; NULL != fl; fl = fl->next )
128 last_active = clients;
129 client_list = clients->next;
131 while (NULL != client_list)
133 csp = &client_list->csp;
134 if (csp->flags & CSP_FLAG_ACTIVE)
136 /* Mark this client's files as active */
139 * Always have a configuration file.
140 * (Also note the slightly non-standard extra
143 csp->config->config_file_list->active = 1;
148 for (i = 0; i < MAX_AF_FILES; i++)
150 if (csp->actions_list[i])
152 csp->actions_list[i]->active = 1;
159 for (i = 0; i < MAX_AF_FILES; i++)
163 csp->rlist[i]->active = 1;
173 csp->tlist->active = 1;
175 #endif /* def FEATURE_TRUST */
179 last_active = client_list;
180 client_list = client_list->next;
184 * This client is not active. Free its resources.
187 last_active->next = client_list->next;
189 freez(csp->ip_addr_str);
190 freez(csp->iob->buf);
191 freez(csp->error_message);
193 if (csp->action->flags & ACTION_FORWARD_OVERRIDE &&
196 unload_forward_spec(csp->fwd);
198 free_http_request(csp->http);
200 destroy_list(csp->headers);
201 destroy_list(csp->tags);
203 free_current_action(csp->action);
205 #ifdef FEATURE_STATISTICS
207 if (csp->flags & CSP_FLAG_REJECTED)
211 #endif /* def FEATURE_STATISTICS */
215 client_list = last_active->next;
224 if ( ( 0 == fl->active ) && ( NULL != fl->unloader ) )
226 nfl->next = fl->next;
228 (fl->unloader)(fl->f);
242 return active_threads;
247 /*********************************************************************
249 * Function : check_file_changed
251 * Description : Helper function to check if a file needs reloading.
252 * If "current" is still current, return it. Otherwise
253 * allocates a new (zeroed) "struct file_list", fills
254 * in the disk file name and timestamp, and returns it.
257 * 1 : current = The file_list currently being used - will
258 * be checked to see if it is out of date.
259 * May be NULL (which is treated as out of
261 * 2 : filename = Name of file to check.
262 * 3 : newfl = New file list. [Output only]
263 * This will be set to NULL, OR a struct
264 * file_list newly allocated on the
265 * heap, with the filename and lastmodified
266 * fields filled, and all others zeroed.
268 * Returns : If file unchanged: 0 (and sets newfl == NULL)
269 * If file changed: 1 and sets newfl != NULL
270 * On error: 1 and sets newfl == NULL
272 *********************************************************************/
273 int check_file_changed(const struct file_list * current,
274 const char * filename,
275 struct file_list ** newfl)
277 struct file_list *fs;
278 struct stat statbuf[1];
282 if (stat(filename, statbuf) < 0)
284 /* Error, probably file not found. */
289 && (current->lastmodified == statbuf->st_mtime)
290 && (0 == strcmp(current->filename, filename)))
295 fs = (struct file_list *)zalloc(sizeof(struct file_list));
298 /* Out of memory error */
303 fs->filename = strdup(filename);
304 fs->lastmodified = statbuf->st_mtime;
306 if (fs->filename == NULL)
308 /* Out of memory error */
317 /*********************************************************************
319 * Function : simple_read_line
321 * Description : Read a single line from a file and return it.
322 * This is basically a version of fgets() that malloc()s
323 * it's own line buffer. Note that the buffer will
324 * always be a multiple of BUFFER_SIZE bytes long.
325 * Therefore if you are going to keep the string for
326 * an extended period of time, you should probably
327 * strdup() it and free() the original, to save memory.
331 * 1 : dest = destination for newly malloc'd pointer to
332 * line data. Will be set to NULL on error.
333 * 2 : fp = File to read from
334 * 3 : newline = Standard for newlines in the file.
335 * Will be unchanged if it's value on input is not
337 * On output, may be changed from NEWLINE_UNKNOWN to
338 * actual convention in file.
340 * Returns : JB_ERR_OK on success
341 * JB_ERR_MEMORY on out-of-memory
342 * JB_ERR_FILE on EOF.
344 *********************************************************************/
345 jb_err simple_read_line(FILE *fp, char **dest, int *newline)
348 size_t buflen = BUFFER_SIZE;
352 int realnewline = NEWLINE_UNKNOWN;
354 if (NULL == (buf = malloc(buflen)))
356 return JB_ERR_MEMORY;
362 * Character codes. If you have a weird compiler and the following are
363 * incorrect, you also need to fix NEWLINE() in loaders.h
365 #define CHAR_CR '\r' /* ASCII 13 */
366 #define CHAR_LF '\n' /* ASCII 10 */
386 else if (ch == CHAR_CR)
391 if (*newline == NEWLINE_UNKNOWN)
393 *newline = NEWLINE_DOS;
402 if (*newline == NEWLINE_UNKNOWN)
404 *newline = NEWLINE_MAC;
409 if (*newline == NEWLINE_UNKNOWN)
411 *newline = realnewline;
415 else if (ch == CHAR_LF)
419 if (*newline == NEWLINE_UNKNOWN)
421 *newline = NEWLINE_UNIX;
436 buflen += BUFFER_SIZE;
437 if (NULL == (p = realloc(buf, buflen)))
440 return JB_ERR_MEMORY;
449 /*********************************************************************
451 * Function : edit_read_line
453 * Description : Read a single non-empty line from a file and return
454 * it. Trims comments, leading and trailing whitespace
455 * and respects escaping of newline and comment char.
456 * Provides the line in 2 alternative forms: raw and
458 * - raw is the raw data read from the file. If the
459 * line is not modified, then this should be written
461 * - prefix is any comments and blank lines that were
462 * read from the file. If the line is modified, then
463 * this should be written out to the file followed
464 * by the modified data. (If this string is non-empty
465 * then it will have a newline at the end).
466 * - data is the actual data that will be parsed
467 * further by appropriate routines.
468 * On EOF, the 3 strings will all be set to NULL and
469 * 0 will be returned.
472 * 1 : fp = File to read from
473 * 2 : raw_out = destination for newly malloc'd pointer to
474 * raw line data. May be NULL if you don't want it.
475 * 3 : prefix_out = destination for newly malloc'd pointer to
476 * comments. May be NULL if you don't want it.
477 * 4 : data_out = destination for newly malloc'd pointer to
478 * line data with comments and leading/trailing spaces
479 * removed, and line continuation performed. May be
480 * NULL if you don't want it.
481 * 5 : newline = Standard for newlines in the file.
482 * On input, set to value to use or NEWLINE_UNKNOWN.
483 * On output, may be changed from NEWLINE_UNKNOWN to
484 * actual convention in file. May be NULL if you
486 * 6 : line_number = Line number in file. In "lines" as
487 * reported by a text editor, not lines containing data.
489 * Returns : JB_ERR_OK on success
490 * JB_ERR_MEMORY on out-of-memory
491 * JB_ERR_FILE on EOF.
493 *********************************************************************/
494 jb_err edit_read_line(FILE *fp,
499 unsigned long *line_number)
501 char *p; /* Temporary pointer */
502 char *linebuf; /* Line read from file */
503 char *linestart; /* Start of linebuf, usually first non-whitespace char */
504 int contflag = 0; /* Nonzero for line continuation - i.e. line ends '\' */
505 int is_empty = 1; /* Flag if not got any data yet */
506 char *raw = NULL; /* String to be stored in raw_out */
507 char *prefix = NULL; /* String to be stored in prefix_out */
508 char *data = NULL; /* String to be stored in data_out */
509 int scrapnewline; /* Used for (*newline) if newline==NULL */
510 jb_err rval = JB_ERR_OK;
513 assert(raw_out || data_out);
514 assert(newline == NULL
515 || *newline == NEWLINE_UNKNOWN
516 || *newline == NEWLINE_UNIX
517 || *newline == NEWLINE_DOS
518 || *newline == NEWLINE_MAC);
522 scrapnewline = NEWLINE_UNKNOWN;
523 newline = &scrapnewline;
526 /* Set output parameters to NULL */
540 /* Set string variables to new, empty strings. */
547 return JB_ERR_MEMORY;
556 return JB_ERR_MEMORY;
566 return JB_ERR_MEMORY;
570 /* Main loop. Loop while we need more data & it's not EOF. */
572 while ( (contflag || is_empty)
573 && (JB_ERR_OK == (rval = simple_read_line(fp, &linebuf, newline))))
581 string_append(&raw,linebuf);
582 if (string_append(&raw,NEWLINE(*newline)))
587 return JB_ERR_MEMORY;
591 /* Line continuation? Trim escape and set flag. */
592 p = linebuf + strlen(linebuf) - 1;
593 contflag = ((*linebuf != '\0') && (*p == '\\'));
599 /* Trim leading spaces if we're at the start of the line */
601 assert(NULL != data);
604 /* Trim leading spaces */
605 while (*linestart && isspace((int)(unsigned char)*linestart))
611 /* Handle comment characters. */
613 while ((p = strchr(p, '#')) != NULL)
615 /* Found a comment char.. */
616 if ((p != linebuf) && (*(p-1) == '\\'))
618 /* ..and it's escaped, left-shift the line over the escape. */
620 while ((*q = *(q + 1)) != '\0')
624 /* Now scan from just after the "#". */
628 /* Real comment. Save it... */
631 /* Special case: Line only contains a comment, so all the
632 * previous whitespace is considered part of the comment.
633 * Undo the whitespace skipping, if any.
640 string_append(&prefix,p);
641 if (string_append(&prefix, NEWLINE(*newline)))
646 return JB_ERR_MEMORY;
650 /* ... and chop off the rest of the line */
653 } /* END while (there's a # character) */
655 /* Write to the buffer */
661 if (string_append(&data, linestart))
666 return JB_ERR_MEMORY;
672 } /* END while(we need more data) */
674 /* Handle simple_read_line() errors - ignore EOF */
675 if ((rval != JB_ERR_OK) && (rval != JB_ERR_FILE))
683 if (raw ? (*raw == '\0') : is_empty)
685 /* EOF and no data there. (Definition of "data" depends on whether
686 * the caller cares about "raw" or just "data").
697 /* Got at least some data */
699 /* Remove trailing whitespace */
712 *prefix_out = prefix;
731 /*********************************************************************
733 * Function : read_config_line
735 * Description : Read a single non-empty line from a file and return
736 * it. Trims comments, leading and trailing whitespace
737 * and respects escaping of newline and comment char.
740 * 1 : fp = File to read from
741 * 2 : linenum = linenumber in file
742 * 3 : buf = Pointer to a pointer to set to the data buffer.
744 * Returns : NULL on EOF or error
745 * Otherwise, returns buf.
747 *********************************************************************/
748 char *read_config_line(FILE *fp, unsigned long *linenum, char **buf)
751 err = edit_read_line(fp, NULL, NULL, buf, NULL, linenum);
754 if (err == JB_ERR_MEMORY)
756 log_error(LOG_LEVEL_FATAL, "Out of memory loading a config file");
765 /*********************************************************************
767 * Function : unload_trustfile
769 * Description : Unloads a trustfile.
772 * 1 : f = the data structure associated with the trustfile.
776 *********************************************************************/
777 static void unload_trustfile(void *f)
779 struct block_spec *cur = (struct block_spec *)f;
780 struct block_spec *next;
786 free_url_spec(cur->url);
795 #ifdef FEATURE_GRACEFUL_TERMINATION
796 /*********************************************************************
798 * Function : unload_current_trust_file
800 * Description : Unloads current trust file - reset to state at
801 * beginning of program.
807 *********************************************************************/
808 void unload_current_trust_file(void)
810 if (current_trustfile)
812 current_trustfile->unloader = unload_trustfile;
813 current_trustfile = NULL;
816 #endif /* FEATURE_GRACEFUL_TERMINATION */
819 /*********************************************************************
821 * Function : load_trustfile
823 * Description : Read and parse a trustfile and add to files list.
826 * 1 : csp = Current client state (buffers, headers, etc...)
828 * Returns : 0 => Ok, everything else is an error.
830 *********************************************************************/
831 int load_trustfile(struct client_state *csp)
835 struct block_spec *b, *bl;
836 struct url_spec **tl;
840 struct file_list *fs;
841 unsigned long linenum = 0;
842 int trusted_referrers = 0;
844 if (!check_file_changed(current_trustfile, csp->config->trustfile, &fs))
846 /* No need to load */
847 csp->tlist = current_trustfile;
852 goto load_trustfile_error;
855 fs->f = bl = (struct block_spec *)zalloc(sizeof(*bl));
858 goto load_trustfile_error;
861 if ((fp = fopen(csp->config->trustfile, "r")) == NULL)
863 goto load_trustfile_error;
865 log_error(LOG_LEVEL_INFO, "Loading trust file: %s", csp->config->trustfile);
867 tl = csp->config->trust_list;
869 while (read_config_line(fp, &linenum, &buf) != NULL)
888 while ((*p++ = *q++) != '\0')
894 /* skip blank lines */
901 /* allocate a new node */
902 if ((b = zalloc(sizeof(*b))) == NULL)
905 goto load_trustfile_error;
908 /* add it to the list */
914 /* Save the URL pattern */
915 if (create_url_spec(b->url, buf))
918 goto load_trustfile_error;
922 * save a pointer to URL's spec in the list of trusted URL's, too
926 if(++trusted_referrers < MAX_TRUSTED_REFERRERS)
934 if(trusted_referrers >= MAX_TRUSTED_REFERRERS)
937 * FIXME: ... after Privoxy 3.0.4 is out.
939 log_error(LOG_LEVEL_ERROR, "Too many trusted referrers. Current limit is %d, you are using %d.\n"
940 " Additional trusted referrers are treated like ordinary trusted URLs.\n"
941 " (You can increase this limit by changing MAX_TRUSTED_REFERRERS in project.h and recompiling).",
942 MAX_TRUSTED_REFERRERS, trusted_referrers);
949 /* the old one is now obsolete */
950 if (current_trustfile)
952 current_trustfile->unloader = unload_trustfile;
955 fs->next = files->next;
957 current_trustfile = fs;
962 load_trustfile_error:
963 log_error(LOG_LEVEL_FATAL, "can't load trustfile '%s': %E",
964 csp->config->trustfile);
969 #endif /* def FEATURE_TRUST */
972 /*********************************************************************
974 * Function : unload_re_filterfile
976 * Description : Unload the re_filter list by freeing all chained
977 * re_filterfile specs and their data.
980 * 1 : f = the data structure associated with the filterfile.
984 *********************************************************************/
985 static void unload_re_filterfile(void *f)
987 struct re_filterfile_spec *a, *b = (struct re_filterfile_spec *)f;
993 destroy_list(b->patterns);
994 pcrs_free_joblist(b->joblist);
996 freez(b->description);
1005 /*********************************************************************
1007 * Function : unload_forward_spec
1009 * Description : Unload the forward spec settings by freeing all
1010 * memory referenced by members and the memory for
1014 * 1 : fwd = the forward spec.
1018 *********************************************************************/
1019 void unload_forward_spec(struct forward_spec *fwd)
1021 free_url_spec(fwd->url);
1022 freez(fwd->gateway_host);
1023 freez(fwd->forward_host);
1030 #ifdef FEATURE_GRACEFUL_TERMINATION
1031 /*********************************************************************
1033 * Function : unload_current_re_filterfile
1035 * Description : Unloads current re_filter file - reset to state at
1036 * beginning of program.
1042 *********************************************************************/
1043 void unload_current_re_filterfile(void)
1047 for (i = 0; i < MAX_AF_FILES; i++)
1049 if (current_re_filterfile[i])
1051 current_re_filterfile[i]->unloader = unload_re_filterfile;
1052 current_re_filterfile[i] = NULL;
1059 /*********************************************************************
1061 * Function : load_re_filterfiles
1063 * Description : Loads all the filterfiles.
1064 * Generate a chained list of re_filterfile_spec's from
1065 * the "FILTER: " blocks, compiling all their substitutions
1066 * into chained lists of pcrs_job structs.
1069 * 1 : csp = Current client state (buffers, headers, etc...)
1071 * Returns : 0 => Ok, everything else is an error.
1073 *********************************************************************/
1074 int load_re_filterfiles(struct client_state *csp)
1079 for (i = 0; i < MAX_AF_FILES; i++)
1081 if (csp->config->re_filterfile[i])
1083 result = load_one_re_filterfile(csp, i);
1089 else if (current_re_filterfile[i])
1091 current_re_filterfile[i]->unloader = unload_re_filterfile;
1092 current_re_filterfile[i] = NULL;
1100 /*********************************************************************
1102 * Function : load_one_re_filterfile
1104 * Description : Load a re_filterfile.
1105 * Generate a chained list of re_filterfile_spec's from
1106 * the "FILTER: " blocks, compiling all their substitutions
1107 * into chained lists of pcrs_job structs.
1110 * 1 : csp = Current client state (buffers, headers, etc...)
1112 * Returns : 0 => Ok, everything else is an error.
1114 *********************************************************************/
1115 int load_one_re_filterfile(struct client_state *csp, int fileid)
1119 struct re_filterfile_spec *new_bl, *bl = NULL;
1120 struct file_list *fs;
1124 unsigned long linenum = 0;
1125 pcrs_job *dummy, *lastjob = NULL;
1128 * No need to reload if unchanged
1130 if (!check_file_changed(current_re_filterfile[fileid], csp->config->re_filterfile[fileid], &fs))
1132 csp->rlist[fileid] = current_re_filterfile[fileid];
1137 goto load_re_filterfile_error;
1141 * Open the file or fail
1143 if ((fp = fopen(csp->config->re_filterfile[fileid], "r")) == NULL)
1145 goto load_re_filterfile_error;
1148 log_error(LOG_LEVEL_INFO, "Loading filter file: %s", csp->config->re_filterfile[fileid]);
1153 while (read_config_line(fp, &linenum, &buf) != NULL)
1155 int new_filter = NO_NEW_FILTER;
1157 if (strncmp(buf, "FILTER:", 7) == 0)
1159 new_filter = FT_CONTENT_FILTER;
1161 else if (strncmp(buf, "SERVER-HEADER-FILTER:", 21) == 0)
1163 new_filter = FT_SERVER_HEADER_FILTER;
1165 else if (strncmp(buf, "CLIENT-HEADER-FILTER:", 21) == 0)
1167 new_filter = FT_CLIENT_HEADER_FILTER;
1169 else if (strncmp(buf, "CLIENT-HEADER-TAGGER:", 21) == 0)
1171 new_filter = FT_CLIENT_HEADER_TAGGER;
1173 else if (strncmp(buf, "SERVER-HEADER-TAGGER:", 21) == 0)
1175 new_filter = FT_SERVER_HEADER_TAGGER;
1179 * If this is the head of a new filter block, make it a
1180 * re_filterfile spec of its own and chain it to the list:
1182 if (new_filter != NO_NEW_FILTER)
1184 new_bl = (struct re_filterfile_spec *)zalloc(sizeof(*bl));
1187 goto load_re_filterfile_error;
1189 if (new_filter == FT_CONTENT_FILTER)
1191 new_bl->name = chomp(buf + 7);
1195 new_bl->name = chomp(buf + 21);
1197 new_bl->type = new_filter;
1200 * If a filter description is available,
1201 * encode it to HTML and save it.
1203 if (NULL != (new_bl->description = strpbrk(new_bl->name, " \t")))
1205 *new_bl->description++ = '\0';
1206 new_bl->description = html_encode(chomp(new_bl->description));
1207 if (NULL == new_bl->description)
1209 new_bl->description = strdup("Out of memory while encoding this filter's description to HTML");
1214 new_bl->description = strdup("No description available for this filter");
1217 new_bl->name = strdup(chomp(new_bl->name));
1220 * If this is the first filter block, chain it
1221 * to the file_list rather than its (nonexistant)
1235 log_error(LOG_LEVEL_RE_FILTER, "Reading in filter \"%s\" (\"%s\")", bl->name, bl->description);
1242 * Else, save the expression, make it a pcrs_job
1243 * and chain it into the current filter's joblist
1247 error = enlist(bl->patterns, buf);
1248 if (JB_ERR_MEMORY == error)
1250 log_error(LOG_LEVEL_FATAL,
1251 "Out of memory while enlisting re_filter job \'%s\' for filter %s.", buf, bl->name);
1253 assert(JB_ERR_OK == error);
1255 if (pcrs_job_is_dynamic(buf))
1258 * Dynamic pattern that might contain variables
1259 * and has to be recompiled for every request
1261 if (bl->joblist != NULL)
1263 pcrs_free_joblist(bl->joblist);
1267 log_error(LOG_LEVEL_RE_FILTER,
1268 "Adding dynamic re_filter job \'%s\' to filter %s succeeded.", buf, bl->name);
1272 else if (bl->dynamic)
1275 * A previous job was dynamic and as we
1276 * recompile the whole filter anyway, it
1277 * makes no sense to compile this job now.
1279 log_error(LOG_LEVEL_RE_FILTER,
1280 "Adding static re_filter job \'%s\' to dynamic filter %s succeeded.", buf, bl->name);
1285 if ((dummy = pcrs_compile_command(buf, &error)) == NULL)
1287 log_error(LOG_LEVEL_ERROR,
1288 "Adding re_filter job \'%s\' to filter %s failed with error %d.", buf, bl->name, error);
1294 if (bl->joblist == NULL)
1296 bl->joblist = dummy;
1298 else if (NULL != lastjob)
1300 lastjob->next = dummy;
1303 log_error(LOG_LEVEL_RE_FILTER, "Adding re_filter job \'%s\' to filter %s succeeded.", buf, bl->name);
1308 log_error(LOG_LEVEL_ERROR, "Ignoring job %s outside filter block in %s, line %d",
1309 buf, csp->config->re_filterfile[fileid], linenum);
1317 * Schedule the now-obsolete old data for unloading
1319 if ( NULL != current_re_filterfile[fileid] )
1321 current_re_filterfile[fileid]->unloader = unload_re_filterfile;
1325 * Chain this file into the global list of loaded files
1327 fs->next = files->next;
1329 current_re_filterfile[fileid] = fs;
1330 csp->rlist[fileid] = fs;
1334 load_re_filterfile_error:
1335 log_error(LOG_LEVEL_FATAL, "can't load re_filterfile '%s': %E",
1336 csp->config->re_filterfile[fileid]);
1342 /*********************************************************************
1344 * Function : add_loader
1346 * Description : Called from `load_config'. Called once for each input
1347 * file found in config.
1350 * 1 : loader = pointer to a function that can parse and load
1351 * the appropriate config file.
1352 * 2 : config = The configuration_spec to add the loader to.
1356 *********************************************************************/
1357 void add_loader(int (*loader)(struct client_state *),
1358 struct configuration_spec * config)
1362 for (i = 0; i < NLOADERS; i++)
1364 if (config->loaders[i] == NULL)
1366 config->loaders[i] = loader;
1374 /*********************************************************************
1376 * Function : run_loader
1378 * Description : Called from `load_config' and `listen_loop'. This
1379 * function keeps the "csp" current with any file mods
1380 * since the last loop. If a file is unchanged, the
1381 * loader functions do NOT reload the file.
1384 * 1 : csp = Current client state (buffers, headers, etc...)
1385 * Must be non-null. Reads: "csp->config"
1386 * Writes: various data members.
1388 * Returns : 0 => Ok, everything else is an error.
1390 *********************************************************************/
1391 int run_loader(struct client_state *csp)
1396 for (i = 0; i < NLOADERS; i++)
1398 if (csp->config->loaders[i] == NULL)
1402 ret |= (csp->config->loaders[i])(csp);
1408 /*********************************************************************
1410 * Function : file_has_been_modified
1412 * Description : Helper function to check if a file has been changed
1415 * 1 : filename = The name of the file to check
1416 * 2 : last_known_modification = The time of the last known
1419 * Returns : TRUE if the file has been changed,
1422 *********************************************************************/
1423 static int file_has_been_modified(const char *filename, time_t last_know_modification)
1425 struct stat statbuf[1];
1427 if (stat(filename, statbuf) < 0)
1429 /* Error, probably file not found which counts as change. */
1433 return (last_know_modification != statbuf->st_mtime);
1437 /*********************************************************************
1439 * Function : any_loaded_file_changed
1441 * Description : Helper function to check if any loaded file has been
1442 * changed since the time it has been loaded.
1444 * XXX: Should we cache the return value for x seconds?
1447 * 1 : files_to_check = List of files to check
1449 * Returns : TRUE if any file has been changed,
1452 *********************************************************************/
1453 int any_loaded_file_changed(const struct file_list *files_to_check)
1455 const struct file_list *file_to_check = files_to_check;
1457 while (file_to_check != NULL)
1459 if (file_has_been_modified(file_to_check->filename, file_to_check->lastmodified))
1461 log_error(LOG_LEVEL_INFO,
1462 "File modification detected: %s", file_to_check->filename);
1465 file_to_check = file_to_check->next;