-const char loaders_rcs[] = "$Id: loaders.c,v 1.62 2007/04/30 15:02:18 fabiankeil Exp $";
+const char loaders_rcs[] = "$Id: loaders.c,v 1.81 2011/03/03 14:38:36 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/loaders.c,v $
* the list of active loaders, and to automatically
* unload files that are no longer in use.
*
- * Copyright : Written by and Copyright (C) 2001-2007 the SourceForge
+ * Copyright : Written by and Copyright (C) 2001-2010 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
- * Revisions :
- * $Log: loaders.c,v $
- * Revision 1.62 2007/04/30 15:02:18 fabiankeil
- * Introduce dynamic pcrs jobs that can resolve variables.
- *
- * Revision 1.61 2007/04/15 16:39:21 fabiankeil
- * Introduce tags as alternative way to specify which
- * actions apply to a request. At the moment tags can be
- * created based on client and server headers.
- *
- * Revision 1.60 2007/03/20 15:16:34 fabiankeil
- * Use dedicated header filter actions instead of abusing "filter".
- * Replace "filter-client-headers" and "filter-client-headers"
- * with "server-header-filter" and "client-header-filter".
- *
- * Revision 1.59 2007/01/25 13:38:20 fabiankeil
- * Freez csp->error_message in sweep().
- *
- * Revision 1.58 2006/12/31 14:25:20 fabiankeil
- * Fix gcc43 compiler warnings.
- *
- * Revision 1.57 2006/12/21 12:22:22 fabiankeil
- * html_encode filter descriptions.
- *
- * Have "Ignoring job ..." error messages
- * print the filter file name correctly.
- *
- * Revision 1.56 2006/09/07 10:40:30 fabiankeil
- * Turns out trusted referrers above our arbitrary
- * limit are downgraded too ordinary trusted URLs.
- * Adjusted error message.
- *
- * Revision 1.55 2006/09/07 10:25:39 fabiankeil
- * Fix typo.
- *
- * Revision 1.54 2006/09/07 10:22:20 fabiankeil
- * If too many trusted referrers are used,
- * print only one error message instead of logging
- * every single trusted referrer above the arbitrary
- * limit.
- *
- * Revision 1.53 2006/08/31 16:25:06 fabiankeil
- * Work around a buffer overflow that caused Privoxy to
- * segfault if too many trusted referrers were used. Good
- * enough for now, but should be replaced with a real
- * solution after the next release.
- *
- * Revision 1.52 2006/07/18 14:48:46 david__schmidt
- * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
- * with what was really the latest development (the v_3_0_branch branch)
- *
- * Revision 1.50.2.8 2006/01/30 15:16:25 david__schmidt
- * Remove a little residual debugging info
- *
- * Revision 1.50.2.7 2006/01/29 23:10:56 david__schmidt
- * Multiple filter file support
- *
- * Revision 1.50.2.6 2003/10/24 10:17:54 oes
- * Nit: Allowed tabs as separators in filter headings
- *
- * Revision 1.50.2.5 2003/05/08 15:19:15 oes
- * sweep: Made loop structure of sweep step mirror that of mark step
- *
- * Revision 1.50.2.4 2003/05/06 15:57:12 oes
- * Bugfix: Update last_active pointer in sweep() before
- * leaving an active client. Closes bugs #724395, #727882
- *
- * Revision 1.50.2.3 2002/11/20 17:12:30 oes
- * Ooops, forgot one change.
- *
- * Revision 1.50.2.2 2002/11/20 14:38:15 oes
- * Fixed delayed/incomplete freeing of client resources and
- * simplified loop structure in sweep.
- * Thanks to Oliver Stoeneberg for the hint.
- *
- * Revision 1.50.2.1 2002/07/26 15:19:24 oes
- * - PCRS jobs now chained in order of appearance. Previous
- * reverse chaining was counter-intuitive.
- * - Changed loglevel of PCRS job compile errors to
- * LOG_LEVEL_ERROR
- *
- * Revision 1.50 2002/04/24 02:12:16 oes
- * Jon's multiple AF patch: Sweep now takes care of all AFs
- *
- * Revision 1.49 2002/04/19 16:53:25 jongfoster
- * Optimize away a function call by using an equivalent macro
- *
- * Revision 1.48 2002/04/05 00:56:09 gliptak
- * Correcting typo to clean up on realloc failure
- *
- * Revision 1.47 2002/03/26 22:29:55 swa
- * we have a new homepage!
- *
- * Revision 1.46 2002/03/24 13:25:43 swa
- * name change related issues
- *
- * Revision 1.45 2002/03/16 23:54:06 jongfoster
- * Adding graceful termination feature, to help look for memory leaks.
- * If you enable this (which, by design, has to be done by hand
- * editing config.h) and then go to http://i.j.b/die, then the program
- * will exit cleanly after the *next* request. It should free all the
- * memory that was used.
- *
- * Revision 1.44 2002/03/16 21:51:00 jongfoster
- * Fixing free(NULL).
- *
- * Revision 1.43 2002/03/16 20:28:34 oes
- * Added descriptions to the filters so users will know what they select in the cgi editor
- *
- * Revision 1.42 2002/03/13 00:27:05 jongfoster
- * Killing warnings
- *
- * Revision 1.41 2002/03/12 01:42:50 oes
- * Introduced modular filters
- *
- * Revision 1.40 2002/03/08 17:46:04 jongfoster
- * Fixing int/size_t warnings
- *
- * Revision 1.39 2002/03/07 03:46:17 oes
- * Fixed compiler warnings
- *
- * Revision 1.38 2002/03/06 22:54:35 jongfoster
- * Automated function-comment nitpicking.
- *
- * Revision 1.37 2002/03/03 15:07:49 oes
- * Re-enabled automatic config reloading
- *
- * Revision 1.36 2002/01/22 23:46:18 jongfoster
- * Moving edit_read_line() and simple_read_line() to loaders.c, and
- * extending them to support reading MS-DOS, Mac and UNIX style files
- * on all platforms.
- *
- * Modifying read_config_line() (without changing it's prototype) to
- * be a trivial wrapper for edit_read_line(). This means that we have
- * one function to read a line and handle comments, which is common
- * between the initialization code and the edit interface.
- *
- * Revision 1.35 2002/01/17 21:03:08 jongfoster
- * Moving all our URL and URL pattern parsing code to urlmatch.c.
- *
- * Renaming free_url to free_url_spec, since it frees a struct url_spec.
- *
- * Revision 1.34 2001/12/30 14:07:32 steudten
- * - Add signal handling (unix)
- * - Add SIGHUP handler (unix)
- * - Add creation of pidfile (unix)
- * - Add action 'top' in rc file (RH)
- * - Add entry 'SIGNALS' to manpage
- * - Add exit message to logfile (unix)
- *
- * Revision 1.33 2001/11/13 00:16:38 jongfoster
- * Replacing references to malloc.h with the standard stdlib.h
- * (See ANSI or K&R 2nd Ed)
- *
- * Revision 1.32 2001/11/07 00:02:13 steudten
- * Add line number in error output for lineparsing for
- * actionsfile and configfile.
- * Special handling for CLF added.
- *
- * Revision 1.31 2001/10/26 17:39:01 oes
- * Removed csp->referrer
- * Moved ijb_isspace and ijb_tolower to project.h
- *
- * Revision 1.30 2001/10/25 03:40:48 david__schmidt
- * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
- * threads to call select() simultaneously. So, it's time to do a real, live,
- * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
- * (native). Both versions will work, but using __OS2__ offers multi-threading.
- *
- * Revision 1.29 2001/10/23 21:38:53 jongfoster
- * Adding error-checking to create_url_spec()
- *
- * Revision 1.28 2001/10/07 15:40:39 oes
- * Replaced 6 boolean members of csp with one bitmap (csp->flags)
- *
- * Revision 1.27 2001/09/22 16:36:59 jongfoster
- * Removing unused parameter fs from read_config_line()
- *
- * Revision 1.26 2001/09/22 14:05:22 jongfoster
- * Bugfix: Multiple escaped "#" characters in a configuration
- * file are now permitted.
- * Also removing 3 unused headers.
- *
- * Revision 1.25 2001/09/13 22:44:03 jongfoster
- * Adding {} to an if statement
- *
- * Revision 1.24 2001/07/30 22:08:36 jongfoster
- * Tidying up #defines:
- * - All feature #defines are now of the form FEATURE_xxx
- * - Permanently turned off WIN_GUI_EDIT
- * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
- *
- * Revision 1.23 2001/07/20 15:51:54 oes
- * Fixed indentation of prepocessor commands
- *
- * Revision 1.22 2001/07/20 15:16:17 haroon
- * - per Guy's suggestion, added a while loop in sweep() to catch not just
- * the last inactive CSP but all other consecutive inactive CSPs after that
- * as well
- *
- * Revision 1.21 2001/07/18 17:26:24 oes
- * Changed to conform to new pcrs interface
- *
- * Revision 1.20 2001/07/17 13:07:01 oes
- * Fixed segv when last line in config files
- * lacked a terminating (\r)\n
- *
- * Revision 1.19 2001/07/13 14:01:54 oes
- * Removed all #ifdef PCRS
- *
- * Revision 1.18 2001/06/29 21:45:41 oes
- * Indentation, CRLF->LF, Tab-> Space
- *
- * Revision 1.17 2001/06/29 13:31:51 oes
- * Various adaptions
- *
- * Revision 1.16 2001/06/09 10:55:28 jongfoster
- * Changing BUFSIZ ==> BUFFER_SIZE
- *
- * Revision 1.15 2001/06/07 23:14:14 jongfoster
- * Removing ACL and forward file loaders - these
- * files have been merged into the config file.
- * Cosmetic: Moving unloader funcs next to their
- * respective loader funcs
- *
- * Revision 1.14 2001/06/01 03:27:04 oes
- * Fixed line continuation problem
- *
- * Revision 1.13 2001/05/31 21:28:49 jongfoster
- * Removed all permissionsfile code - it's now called the actions
- * file, and (almost) all the code is in actions.c
- *
- * Revision 1.12 2001/05/31 17:32:31 oes
- *
- * - Enhanced domain part globbing with infix and prefix asterisk
- * matching and optional unanchored operation
- *
- * Revision 1.11 2001/05/29 23:25:24 oes
- *
- * - load_config_line() and load_permissions_file() now use chomp()
- *
- * Revision 1.10 2001/05/29 09:50:24 jongfoster
- * Unified blocklist/imagelist/permissionslist.
- * File format is still under discussion, but the internal changes
- * are (mostly) done.
- *
- * Also modified interceptor behaviour:
- * - We now intercept all URLs beginning with one of the following
- * prefixes (and *only* these prefixes):
- * * http://i.j.b/
- * * http://ijbswa.sf.net/config/
- * * http://ijbswa.sourceforge.net/config/
- * - New interceptors "home page" - go to http://i.j.b/ to see it.
- * - Internal changes so that intercepted and fast redirect pages
- * are not replaced with an image.
- * - Interceptors now have the option to send a binary page direct
- * to the client. (i.e. ijb-send-banner uses this)
- * - Implemented show-url-info interceptor. (Which is why I needed
- * the above interceptors changes - a typical URL is
- * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
- * The previous mechanism would not have intercepted that, and
- * if it had been intercepted then it then it would have replaced
- * it with an image.)
- *
- * Revision 1.9 2001/05/26 17:12:07 jongfoster
- * Fatal errors loading configuration files now give better error messages.
- *
- * Revision 1.8 2001/05/26 00:55:20 jongfoster
- * Removing duplicated code. load_forwardfile() now uses create_url_spec()
- *
- * Revision 1.7 2001/05/26 00:28:36 jongfoster
- * Automatic reloading of config file.
- * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
- * Most of the global variables have been moved to a new
- * struct configuration_spec, accessed through csp->config->globalname
- * Most of the globals remaining are used by the Win32 GUI.
- *
- * Revision 1.6 2001/05/23 12:27:33 oes
- *
- * Fixed ugly indentation of my last changes
- *
- * Revision 1.5 2001/05/23 10:39:05 oes
- * - Added support for escaping the comment character
- * in config files by a backslash
- * - Added support for line continuation in config
- * files
- * - Fixed a buffer overflow bug with long config lines
- *
- * Revision 1.4 2001/05/22 18:56:28 oes
- * CRLF -> LF
- *
- * Revision 1.3 2001/05/20 01:21:20 jongfoster
- * Version 2.9.4 checkin.
- * - Merged popupfile and cookiefile, and added control over PCRS
- * filtering, in new "permissionsfile".
- * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
- * file error you now get a message box (in the Win32 GUI) rather
- * than the program exiting with no explanation.
- * - Made killpopup use the PCRS MIME-type checking and HTTP-header
- * skipping.
- * - Removed tabs from "config"
- * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
- * - Bumped up version number.
- *
- * Revision 1.2 2001/05/17 23:01:01 oes
- * - Cleaned CRLF's from the sources and related files
- *
- * Revision 1.1.1.1 2001/05/15 13:58:59 oes
- * Initial import of version 2.9.3 source tree
- *
- *
*********************************************************************/
-\f
+
#include "config.h"
*
* Parameters : None
*
- * Returns : N/A
+ * Returns : The number of threads that are still active.
*
*********************************************************************/
-void sweep(void)
+unsigned int sweep(void)
{
struct file_list *fl, *nfl;
- struct client_state *csp, *last_active;
+ struct client_state *csp;
+ struct client_states *last_active, *client_list;
int i;
+ unsigned int active_threads = 0;
/* clear all of the file's active flags */
for ( fl = files->next; NULL != fl; fl = fl->next )
}
last_active = clients;
- csp = clients->next;
+ client_list = clients->next;
- while (NULL != csp)
+ while (NULL != client_list)
{
+ csp = &client_list->csp;
if (csp->flags & CSP_FLAG_ACTIVE)
{
/* Mark this client's files as active */
csp->tlist->active = 1;
}
#endif /* def FEATURE_TRUST */
-
- last_active = csp;
- csp = csp->next;
+ active_threads++;
+
+ last_active = client_list;
+ client_list = client_list->next;
}
else
/*
* This client is not active. Free its resources.
*/
{
- last_active->next = csp->next;
+ last_active->next = client_list->next;
freez(csp->ip_addr_str);
- freez(csp->my_ip_addr_str);
- freez(csp->my_hostname);
- freez(csp->x_forwarded);
freez(csp->iob->buf);
freez(csp->error_message);
+ if (csp->action->flags & ACTION_FORWARD_OVERRIDE &&
+ NULL != csp->fwd)
+ {
+ unload_forward_spec(csp->fwd);
+ }
free_http_request(csp->http);
destroy_list(csp->headers);
}
#endif /* def FEATURE_STATISTICS */
- freez(csp);
+ freez(client_list);
- csp = last_active->next;
+ client_list = last_active->next;
}
}
}
}
+ return active_threads;
+
}
p = buf;
/*
- * Character codes. If you have a wierd compiler and the following are
+ * Character codes. If you have a weird compiler and the following are
* incorrect, you also need to fix NEWLINE() in loaders.h
*/
#define CHAR_CR '\r' /* ASCII 13 */
if (raw_out)
{
- if ((raw = malloc(1)) == NULL)
+ raw = strdup("");
+ if (NULL == raw)
{
return JB_ERR_MEMORY;
}
- *raw = '\0';
}
if (prefix_out)
{
- if ((prefix = malloc(1)) == NULL)
+ prefix = strdup("");
+ if (NULL == prefix)
{
freez(raw);
return JB_ERR_MEMORY;
}
- *prefix = '\0';
}
if (data_out)
{
- if ((data = malloc(1)) == NULL)
+ data = strdup("");
+ if (NULL == data)
{
freez(raw);
freez(prefix);
return JB_ERR_MEMORY;
}
- *data = '\0';
}
/* Main loop. Loop while we need more data & it's not EOF. */
/* Trim leading spaces if we're at the start of the line */
linestart = linebuf;
+ assert(NULL != data);
if (*data == '\0')
{
/* Trim leading spaces */
* and respects escaping of newline and comment char.
*
* Parameters :
- * 1 : buf = Buffer to use.
- * 2 : buflen = Size of buffer in bytes.
- * 3 : fp = File to read from
- * 4 : linenum = linenumber in file
+ * 1 : fp = File to read from
+ * 2 : linenum = linenumber in file
+ * 3 : buf = Pointer to a pointer to set to the data buffer.
*
* Returns : NULL on EOF or error
* Otherwise, returns buf.
*
*********************************************************************/
-char *read_config_line(char *buf, size_t buflen, FILE *fp, unsigned long *linenum)
+char *read_config_line(FILE *fp, unsigned long *linenum, char **buf)
{
jb_err err;
- char *buf2 = NULL;
- err = edit_read_line(fp, NULL, NULL, &buf2, NULL, linenum);
+ err = edit_read_line(fp, NULL, NULL, buf, NULL, linenum);
if (err)
{
if (err == JB_ERR_MEMORY)
{
log_error(LOG_LEVEL_FATAL, "Out of memory loading a config file");
}
- return NULL;
- }
- else
- {
- assert(buf2);
- assert(strlen(buf2) + 1U < buflen);
- strncpy(buf, buf2, buflen - 1);
- free(buf2);
- buf[buflen - 1] = '\0';
- return buf;
+ *buf = NULL;
}
+ return *buf;
}
struct block_spec *b, *bl;
struct url_spec **tl;
- char buf[BUFFER_SIZE], *p, *q;
+ char *buf = NULL;
int reject, trusted;
struct file_list *fs;
unsigned long linenum = 0;
if (!check_file_changed(current_trustfile, csp->config->trustfile, &fs))
{
/* No need to load */
- if (csp)
- {
- csp->tlist = current_trustfile;
- }
+ csp->tlist = current_trustfile;
return(0);
}
if (!fs)
{
goto load_trustfile_error;
}
+ log_error(LOG_LEVEL_INFO, "Loading trust file: %s", csp->config->trustfile);
tl = csp->config->trust_list;
- while (read_config_line(buf, sizeof(buf), fp, &linenum) != NULL)
+ while (read_config_line(fp, &linenum, &buf) != NULL)
{
trusted = 0;
reject = 1;
if (*buf == '~')
{
+ char *p;
+ char *q;
+
reject = 0;
p = buf;
q = p+1;
/* skip blank lines */
if (*buf == '\0')
{
+ freez(buf);
continue;
}
*tl++ = b->url;
}
}
+ freez(buf);
}
if(trusted_referrers >= MAX_TRUSTED_REFERRERS)
{
csp->tlist = fs;
}
-
return(0);
load_trustfile_error:
log_error(LOG_LEVEL_FATAL, "can't load trustfile '%s': %E",
- csp->config->trustfile);
+ csp->config->trustfile);
+ freez(buf);
return(-1);
}
return;
}
+/*********************************************************************
+ *
+ * Function : unload_forward_spec
+ *
+ * Description : Unload the forward spec settings by freeing all
+ * memory referenced by members and the memory for
+ * the spec itself.
+ *
+ * Parameters :
+ * 1 : fwd = the forward spec.
+ *
+ * Returns : N/A
+ *
+ *********************************************************************/
+void unload_forward_spec(struct forward_spec *fwd)
+{
+ free_url_spec(fwd->url);
+ freez(fwd->gateway_host);
+ freez(fwd->forward_host);
+ free(fwd);
+
+ return;
+}
+
#ifdef FEATURE_GRACEFUL_TERMINATION
/*********************************************************************
/*********************************************************************
*
- * Function : load_re_filterfile
+ * Function : load_re_filterfiles
*
- * Description : Load the re_filterfile.
+ * Description : Loads all the filterfiles.
* Generate a chained list of re_filterfile_spec's from
* the "FILTER: " blocks, compiling all their substitutions
* into chained lists of pcrs_job structs.
* Returns : 0 => Ok, everything else is an error.
*
*********************************************************************/
-int load_re_filterfile(struct client_state *csp)
+int load_re_filterfiles(struct client_state *csp)
{
int i;
int result;
struct re_filterfile_spec *new_bl, *bl = NULL;
struct file_list *fs;
- char buf[BUFFER_SIZE];
+ char *buf = NULL;
int error;
unsigned long linenum = 0;
pcrs_job *dummy, *lastjob = NULL;
goto load_re_filterfile_error;
}
+ log_error(LOG_LEVEL_INFO, "Loading filter file: %s", csp->config->re_filterfile[fileid]);
+
/*
* Read line by line
*/
- while (read_config_line(buf, sizeof(buf), fp, &linenum) != NULL)
+ while (read_config_line(fp, &linenum, &buf) != NULL)
{
int new_filter = NO_NEW_FILTER;
}
else
{
+ assert(NULL != bl);
bl->next = new_bl;
}
bl = new_bl;
log_error(LOG_LEVEL_RE_FILTER, "Reading in filter \"%s\" (\"%s\")", bl->name, bl->description);
+ freez(buf);
continue;
}
bl->dynamic = 1;
log_error(LOG_LEVEL_RE_FILTER,
"Adding dynamic re_filter job \'%s\' to filter %s succeeded.", buf, bl->name);
+ freez(buf);
continue;
}
else if (bl->dynamic)
*/
log_error(LOG_LEVEL_RE_FILTER,
"Adding static re_filter job \'%s\' to dynamic filter %s succeeded.", buf, bl->name);
+ freez(buf);
continue;
}
{
log_error(LOG_LEVEL_ERROR,
"Adding re_filter job \'%s\' to filter %s failed with error %d.", buf, bl->name, error);
+ freez(buf);
continue;
}
else
{
bl->joblist = dummy;
}
- else
+ else if (NULL != lastjob)
{
lastjob->next = dummy;
}
log_error(LOG_LEVEL_ERROR, "Ignoring job %s outside filter block in %s, line %d",
buf, csp->config->re_filterfile[fileid], linenum);
}
+ freez(buf);
}
fclose(fp);
}
+/*********************************************************************
+ *
+ * Function : file_has_been_modified
+ *
+ * Description : Helper function to check if a file has been changed
+ *
+ * Parameters :
+ * 1 : filename = The name of the file to check
+ * 2 : last_known_modification = The time of the last known
+ * modification
+ *
+ * Returns : TRUE if the file has been changed,
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+static int file_has_been_modified(const char *filename, time_t last_know_modification)
+{
+ struct stat statbuf[1];
+
+ if (stat(filename, statbuf) < 0)
+ {
+ /* Error, probably file not found which counts as change. */
+ return 1;
+ }
+
+ return (last_know_modification != statbuf->st_mtime);
+}
+
+
+/*********************************************************************
+ *
+ * Function : any_loaded_file_changed
+ *
+ * Description : Helper function to check if any loaded file has been
+ * changed since the time it has been loaded.
+ *
+ * XXX: Should we cache the return value for x seconds?
+ *
+ * Parameters :
+ * 1 : files_to_check = List of files to check
+ *
+ * Returns : TRUE if any file has been changed,
+ * FALSE otherwise.
+ *
+ *********************************************************************/
+int any_loaded_file_changed(const struct file_list *files_to_check)
+{
+ const struct file_list *file_to_check = files_to_check;
+
+ while (file_to_check != NULL)
+ {
+ if (file_has_been_modified(file_to_check->filename, file_to_check->lastmodified))
+ {
+ log_error(LOG_LEVEL_INFO,
+ "File modification detected: %s", file_to_check->filename);
+ return TRUE;
+ }
+ file_to_check = file_to_check->next;
+ }
+ return FALSE;
+}
+
/*
Local Variables:
projects / privoxy.git / blobdiff