+++ /dev/null
-const char loaders_rcs[] = "$Id: loaders.c,v 2.1 2002/06/04 17:22:37 jongfoster Exp $";
-/*********************************************************************
- *
- * File : $Source: /cvsroot/ijbswa//current/src/loaders.c,v $
- *
- * Purpose : Functions to load and unload the various
- * configuration files. Also contains code to manage
- * the list of active loaders, and to automatically
- * unload files that are no longer in use.
- *
- * Copyright : Written by and Copyright (C) 2001 the SourceForge
- * Privoxy team. http://www.privoxy.org/
- *
- * Based on the Internet Junkbuster originally written
- * by and Copyright (C) 1997 Anonymous Coders and
- * Junkbusters Corporation. http://www.junkbusters.com
- *
- * This program is free software; you can redistribute it
- * and/or modify it under the terms of the GNU General
- * Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will
- * be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A
- * PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * The GNU General Public License should be included with
- * this file. If not, you can view it at
- * http://www.gnu.org/copyleft/gpl.html
- * or write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Revisions :
- * $Log: loaders.c,v $
- * Revision 2.1 2002/06/04 17:22:37 jongfoster
- * Adding comments
- *
- * Revision 2.0 2002/06/04 14:34:21 jongfoster
- * Moving source files to src/
- *
- * 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"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/stat.h>
-#include <ctype.h>
-#include <assert.h>
-
-#if !defined(_WIN32) && !defined(__OS2__)
-#include <unistd.h>
-#endif
-
-#include "project.h"
-#include "list.h"
-#include "loaders.h"
-#include "filters.h"
-#include "parsers.h"
-#include "jcc.h"
-#include "miscutil.h"
-#include "errlog.h"
-#include "actions.h"
-#include "urlmatch.h"
-
-const char loaders_h_rcs[] = LOADERS_H_VERSION;
-
-
-#ifdef FEATURE_TRUST
-/**
- * Currently active trust file.
- * This is also entered in the main linked list of files.
- */
-static struct file_list *current_trustfile = NULL;
-#endif /* def FEATURE_TRUST */
-
-
-/**
- * Currently active re_filter file.
- * This is also entered in the main linked list of files.
- */
-static struct file_list *current_re_filterfile = NULL;
-
-
-/**
- * Character code for CR (ASCII 13).
- * If you have a wierd compiler and this definition is
- * incorrect, you also need to fix NEWLINE() in loaders.h
- */
-#define CHAR_CR '\r' /* ASCII 13 */
-
-
-/**
- * Character code for LF (ASCII 10).
- * If you have a wierd compiler and this definition is
- * incorrect, you also need to fix NEWLINE() in loaders.h
- */
-#define CHAR_LF '\n' /* ASCII 10 */
-
-
-
-/*********************************************************************
- *
- * Function : sweep
- *
- * Description : Basically a mark and sweep garbage collector, it is run
- * (by the parent thread) every once in a while to reclaim memory.
- *
- * It uses a mark and sweep strategy:
- * 1) mark all files as inactive
- *
- * 2) check with each client:
- * if it is active, mark its files as active
- * if it is inactive, free its resources
- *
- * 3) free the resources of all of the files that
- * are still marked as inactive (and are obsolete).
- *
- * N.B. files that are not obsolete don't have an unloader defined.
- *
- * Parameters : None
- *
- * Returns : N/A
- *
- *********************************************************************/
-void sweep(void)
-{
- struct file_list *fl, *nfl;
- struct client_state *csp, *ncsp;
- int i;
-
- /* clear all of the file's active flags */
- for ( fl = files->next; NULL != fl; fl = fl->next )
- {
- fl->active = 0;
- }
-
- for (csp = clients; csp && (NULL != (ncsp = csp->next)) ; csp = csp->next)
- {
- if (ncsp->flags & CSP_FLAG_ACTIVE)
- {
- /* mark this client's files as active */
-
- /*
- * Always have a configuration file.
- * (Also note the slightly non-standard extra
- * indirection here.)
- */
- ncsp->config->config_file_list->active = 1;
-
- for (i = 0; i < MAX_ACTION_FILES; i++)
- {
- if (ncsp->actions_list[i]) /* actions files */
- {
- ncsp->actions_list[i]->active = 1;
- }
- }
-
- if (ncsp->rlist) /* pcrsjob files */
- {
- ncsp->rlist->active = 1;
- }
-
-#ifdef FEATURE_TRUST
- if (ncsp->tlist) /* trust files */
- {
- ncsp->tlist->active = 1;
- }
-#endif /* def FEATURE_TRUST */
-
- }
- else
- /*
- * this client is not active, release its resources
- * and the ones of all inactive clients that might
- * follow it
- */
- {
- while (!(ncsp->flags & CSP_FLAG_ACTIVE))
- {
- csp->next = ncsp->next;
-
- freez(ncsp->ip_addr_str);
- freez(ncsp->my_ip_addr_str);
- freez(ncsp->my_hostname);
- freez(ncsp->x_forwarded);
- freez(ncsp->iob->buf);
-
- free_http_request(ncsp->http);
-
- destroy_list(ncsp->headers);
- destroy_list(ncsp->cookie_list);
-
- free_current_action(ncsp->action);
-
-#ifdef FEATURE_STATISTICS
- urls_read++;
- if (ncsp->flags & CSP_FLAG_REJECTED)
- {
- urls_rejected++;
- }
-#endif /* def FEATURE_STATISTICS */
-
- freez(ncsp);
-
- /* are there any more in sequence after it? */
- if( (ncsp = csp->next) == NULL)
- break;
- }
- }
- }
-
- for (fl = files; fl && ((nfl = fl->next) != NULL) ; fl = fl->next)
- {
- if ( ( 0 == nfl->active ) && ( NULL != nfl->unloader ) )
- {
- fl->next = nfl->next;
-
- (nfl->unloader)(nfl->f);
-
- freez(nfl->filename);
-
- freez(nfl);
- }
- }
-
-}
-
-
-/*********************************************************************
- *
- * Function : check_file_changed
- *
- * Description : Helper function to check if a file needs reloading.
- * If "current" is still current, return it. Otherwise
- * allocates a new (zeroed) "struct file_list", fills
- * in the disk file name and timestamp, and returns it.
- *
- * Parameters :
- * 1 : current = The file_list currently being used - will
- * be checked to see if it is out of date.
- * May be NULL (which is treated as out of
- * date).
- * 2 : filename = Name of file to check.
- * 3 : newfl = New file list. [Output only]
- * This will be set to NULL, OR a struct
- * file_list newly allocated on the
- * heap, with the filename and lastmodified
- * fields filled, and all others zeroed.
- *
- * Returns : If file unchanged: 0 (and sets newfl == NULL)
- * If file changed: 1 and sets newfl != NULL
- * On error: 1 and sets newfl == NULL
- *
- *********************************************************************/
-int check_file_changed(const struct file_list * current,
- const char * filename,
- struct file_list ** newfl)
-{
- struct file_list *fs;
- struct stat statbuf[1];
-
- *newfl = NULL;
-
- if (stat(filename, statbuf) < 0)
- {
- /* Error, probably file not found. */
- return 1;
- }
-
- if (current
- && (current->lastmodified == statbuf->st_mtime)
- && (0 == strcmp(current->filename, filename)))
- {
- return 0;
- }
-
- fs = (struct file_list *)zalloc(sizeof(struct file_list));
- if (fs == NULL)
- {
- /* Out of memory error */
- return 1;
- }
-
- fs->filename = strdup(filename);
- fs->lastmodified = statbuf->st_mtime;
-
- if (fs->filename == NULL)
- {
- /* Out of memory error */
- freez (fs);
- return 1;
- }
- *newfl = fs;
- return 1;
-}
-
-
-/*********************************************************************
- *
- * Function : simple_read_line
- *
- * Description : Read a single line from a file and return it.
- * This is basically a version of fgets() that malloc()s
- * it's own line buffer. Note that the buffer will
- * always be a multiple of BUFFER_SIZE bytes long.
- * Therefore if you are going to keep the string for
- * an extended period of time, you should probably
- * strdup() it and free() the original, to save memory.
- *
- *
- * Parameters :
- * 1 : dest = destination for newly malloc'd pointer to
- * line data. Will be set to NULL on error.
- * 2 : fp = File to read from
- * 3 : newline = Standard for newlines in the file.
- * Will be unchanged if it's value on input is not
- * NEWLINE_UNKNOWN.
- * On output, may be changed from NEWLINE_UNKNOWN to
- * actual convention in file.
- *
- * Returns : JB_ERR_OK on success
- * JB_ERR_MEMORY on out-of-memory
- * JB_ERR_FILE on EOF.
- *
- *********************************************************************/
-jb_err simple_read_line(FILE *fp, char **dest, int *newline)
-{
- size_t len = 0;
- size_t buflen = BUFFER_SIZE;
- char * buf;
- char * p;
- int ch;
- int realnewline = NEWLINE_UNKNOWN;
-
- if (NULL == (buf = malloc(buflen)))
- {
- return JB_ERR_MEMORY;
- }
-
- p = buf;
-
- for (;;)
- {
- ch = getc(fp);
- if (ch == EOF)
- {
- if (len > 0)
- {
- *p = '\0';
- *dest = buf;
- return JB_ERR_OK;
- }
- else
- {
- free(buf);
- *dest = NULL;
- return JB_ERR_FILE;
- }
- }
- else if (ch == CHAR_CR)
- {
- ch = getc(fp);
- if (ch == CHAR_LF)
- {
- if (*newline == NEWLINE_UNKNOWN)
- {
- *newline = NEWLINE_DOS;
- }
- }
- else
- {
- if (ch != EOF)
- {
- ungetc(ch, fp);
- }
- if (*newline == NEWLINE_UNKNOWN)
- {
- *newline = NEWLINE_MAC;
- }
- }
- *p = '\0';
- *dest = buf;
- if (*newline == NEWLINE_UNKNOWN)
- {
- *newline = realnewline;
- }
- return JB_ERR_OK;
- }
- else if (ch == CHAR_LF)
- {
- *p = '\0';
- *dest = buf;
- if (*newline == NEWLINE_UNKNOWN)
- {
- *newline = NEWLINE_UNIX;
- }
- return JB_ERR_OK;
- }
- else if (ch == 0)
- {
- *p = '\0';
- *dest = buf;
- return JB_ERR_OK;
- }
-
- *p++ = ch;
-
- if (++len >= buflen)
- {
- buflen += BUFFER_SIZE;
- if (NULL == (p = realloc(buf, buflen)))
- {
- free(buf);
- return JB_ERR_MEMORY;
- }
- buf = p;
- p = buf + len;
- }
- }
-}
-
-
-/*********************************************************************
- *
- * Function : edit_read_line
- *
- * Description : Read a single non-empty line from a file and return
- * it. Trims comments, leading and trailing whitespace
- * and respects escaping of newline and comment char.
- * Provides the line in 2 alternative forms: raw and
- * preprocessed.
- * - raw is the raw data read from the file. If the
- * line is not modified, then this should be written
- * to the new file.
- * - prefix is any comments and blank lines that were
- * read from the file. If the line is modified, then
- * this should be written out to the file followed
- * by the modified data. (If this string is non-empty
- * then it will have a newline at the end).
- * - data is the actual data that will be parsed
- * further by appropriate routines.
- * On EOF, the 3 strings will all be set to NULL and
- * 0 will be returned.
- *
- * Parameters :
- * 1 : fp = File to read from
- * 2 : raw_out = destination for newly malloc'd pointer to
- * raw line data. May be NULL if you don't want it.
- * 3 : prefix_out = destination for newly malloc'd pointer to
- * comments. May be NULL if you don't want it.
- * 4 : data_out = destination for newly malloc'd pointer to
- * line data with comments and leading/trailing spaces
- * removed, and line continuation performed. May be
- * NULL if you don't want it.
- * 5 : newline = Standard for newlines in the file.
- * On input, set to value to use or NEWLINE_UNKNOWN.
- * On output, may be changed from NEWLINE_UNKNOWN to
- * actual convention in file. May be NULL if you
- * don't want it.
- * 6 : line_number = Line number in file. In "lines" as
- * reported by a text editor, not lines containing data.
- *
- * Returns : JB_ERR_OK on success
- * JB_ERR_MEMORY on out-of-memory
- * JB_ERR_FILE on EOF.
- *
- *********************************************************************/
-jb_err edit_read_line(FILE *fp,
- char **raw_out,
- char **prefix_out,
- char **data_out,
- int *newline,
- unsigned long *line_number)
-{
- char *p; /* Temporary pointer */
- char *linebuf; /* Line read from file */
- char *linestart; /* Start of linebuf, usually first non-whitespace char */
- int contflag = 0; /* Nonzero for line continuation - i.e. line ends '\' */
- int is_empty = 1; /* Flag if not got any data yet */
- char *raw = NULL; /* String to be stored in raw_out */
- char *prefix = NULL; /* String to be stored in prefix_out */
- char *data = NULL; /* String to be stored in data_out */
- int scrapnewline; /* Used for (*newline) if newline==NULL */
- jb_err rval = JB_ERR_OK;
-
- assert(fp);
- assert(raw_out || data_out);
- assert(newline == NULL
- || *newline == NEWLINE_UNKNOWN
- || *newline == NEWLINE_UNIX
- || *newline == NEWLINE_DOS
- || *newline == NEWLINE_MAC);
-
- if (newline == NULL)
- {
- scrapnewline = NEWLINE_UNKNOWN;
- newline = &scrapnewline;
- }
-
- /* Set output parameters to NULL */
- if (raw_out)
- {
- *raw_out = NULL;
- }
- if (prefix_out)
- {
- *prefix_out = NULL;
- }
- if (data_out)
- {
- *data_out = NULL;
- }
-
- /* Set string variables to new, empty strings. */
-
- if (raw_out)
- {
- if ((raw = malloc(1)) == NULL)
- {
- return JB_ERR_MEMORY;
- }
- *raw = '\0';
- }
- if (prefix_out)
- {
- if ((prefix = malloc(1)) == NULL)
- {
- freez(raw);
- return JB_ERR_MEMORY;
- }
- *prefix = '\0';
- }
- if (data_out)
- {
- if ((data = malloc(1)) == NULL)
- {
- freez(raw);
- freez(prefix);
- return JB_ERR_MEMORY;
- }
- *data = '\0';
- }
-
- /* Main loop. Loop while we need more data & it's not EOF. */
-
- while ( (contflag || is_empty)
- && (JB_ERR_OK == (rval = simple_read_line(fp, &linebuf, newline))))
- {
- if (line_number)
- {
- (*line_number)++;
- }
- if (raw)
- {
- string_append(&raw,linebuf);
- if (string_append(&raw,NEWLINE(*newline)))
- {
- freez(prefix);
- freez(data);
- free(linebuf);
- return JB_ERR_MEMORY;
- }
- }
-
- /* Line continuation? Trim escape and set flag. */
- p = linebuf + strlen(linebuf) - 1;
- contflag = ((*linebuf != '\0') && (*p == '\\'));
- if (contflag)
- {
- *p = '\0';
- }
-
- /* Trim leading spaces if we're at the start of the line */
- linestart = linebuf;
- if (*data == '\0')
- {
- /* Trim leading spaces */
- while (*linestart && isspace((int)(unsigned char)*linestart))
- {
- linestart++;
- }
- }
-
- /* Handle comment characters. */
- p = linestart;
- while ((p = strchr(p, '#')) != NULL)
- {
- /* Found a comment char.. */
- if ((p != linebuf) && (*(p-1) == '\\'))
- {
- /* ..and it's escaped, left-shift the line over the escape. */
- char *q = p - 1;
- while ((*q = *(q + 1)) != '\0')
- {
- q++;
- }
- /* Now scan from just after the "#". */
- }
- else
- {
- /* Real comment. Save it... */
- if (p == linestart)
- {
- /* Special case: Line only contains a comment, so all the
- * previous whitespace is considered part of the comment.
- * Undo the whitespace skipping, if any.
- */
- linestart = linebuf;
- p = linestart;
- }
- if (prefix)
- {
- string_append(&prefix,p);
- if (string_append(&prefix, NEWLINE(*newline)))
- {
- freez(raw);
- freez(data);
- free(linebuf);
- return JB_ERR_MEMORY;
- }
- }
-
- /* ... and chop off the rest of the line */
- *p = '\0';
- }
- } /* END while (there's a # character) */
-
- /* Write to the buffer */
- if (*linestart)
- {
- is_empty = 0;
- if (data)
- {
- if (string_append(&data, linestart))
- {
- freez(raw);
- freez(prefix);
- free(linebuf);
- return JB_ERR_MEMORY;
- }
- }
- }
-
- free(linebuf);
- } /* END while(we need more data) */
-
- /* Handle simple_read_line() errors - ignore EOF */
- if ((rval != JB_ERR_OK) && (rval != JB_ERR_FILE))
- {
- freez(raw);
- freez(prefix);
- freez(data);
- return rval;
- }
-
- if (raw ? (*raw == '\0') : is_empty)
- {
- /* EOF and no data there. (Definition of "data" depends on whether
- * the caller cares about "raw" or just "data").
- */
-
- freez(raw);
- freez(prefix);
- freez(data);
-
- return JB_ERR_FILE;
- }
- else
- {
- /* Got at least some data */
-
- /* Remove trailing whitespace */
- chomp(data);
-
- if (raw_out)
- {
- *raw_out = raw;
- }
- else
- {
- freez(raw);
- }
- if (prefix_out)
- {
- *prefix_out = prefix;
- }
- else
- {
- freez(prefix);
- }
- if (data_out)
- {
- *data_out = data;
- }
- else
- {
- freez(data);
- }
- return JB_ERR_OK;
- }
-}
-
-
-/*********************************************************************
- *
- * Function : read_config_line
- *
- * Description : Read a single non-empty line from a file and return
- * it. Trims comments, leading and trailing whitespace
- * 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
- *
- * Returns : NULL on EOF or error
- * Otherwise, returns buf.
- *
- *********************************************************************/
-char *read_config_line(char *buf, size_t buflen, FILE *fp, unsigned long *linenum)
-{
- jb_err err;
- char *buf2 = NULL;
- err = edit_read_line(fp, NULL, NULL, &buf2, 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;
- }
-}
-
-
-#ifdef FEATURE_TRUST
-/*********************************************************************
- *
- * Function : unload_trustfile
- *
- * Description : Unloads a trustfile.
- *
- * Parameters :
- * 1 : f = the data structure associated with the trustfile.
- *
- * Returns : N/A
- *
- *********************************************************************/
-static void unload_trustfile(void *f)
-{
- struct block_spec *cur = (struct block_spec *)f;
- struct block_spec *next;
-
- while (cur != NULL)
- {
- next = cur->next;
-
- free_url_spec(cur->url);
- free(cur);
-
- cur = next;
- }
-
-}
-
-
-#ifdef FEATURE_GRACEFUL_TERMINATION
-/*********************************************************************
- *
- * Function : unload_current_trust_file
- *
- * Description : Unloads current trust file - reset to state at
- * beginning of program.
- *
- * Parameters : None
- *
- * Returns : N/A
- *
- *********************************************************************/
-void unload_current_trust_file(void)
-{
- if (current_trustfile)
- {
- current_trustfile->unloader = unload_trustfile;
- current_trustfile = NULL;
- }
-}
-#endif /* FEATURE_GRACEFUL_TERMINATION */
-
-
-/*********************************************************************
- *
- * Function : load_trustfile
- *
- * Description : Read and parse a trustfile and add to files list.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : 0 => Ok, everything else is an error.
- *
- *********************************************************************/
-int load_trustfile(struct client_state *csp)
-{
- FILE *fp;
-
- struct block_spec *b, *bl;
- struct url_spec **tl;
-
- char buf[BUFFER_SIZE], *p, *q;
- 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;
- }
- return(0);
- }
- if (!fs)
- {
- goto load_trustfile_error;
- }
-
- fs->f = bl = (struct block_spec *)zalloc(sizeof(*bl));
- if (bl == NULL)
- {
- goto load_trustfile_error;
- }
-
- if ((fp = fopen(csp->config->trustfile, "r")) == NULL)
- {
- goto load_trustfile_error;
- }
-
- tl = csp->config->trust_list;
-
- while (read_config_line(buf, sizeof(buf), fp, &linenum) != NULL)
- {
- trusted = 0;
- reject = 1;
-
- if (*buf == '+')
- {
- trusted = 1;
- *buf = '~';
- }
-
- if (*buf == '~')
- {
- reject = 0;
- p = buf;
- q = p+1;
- while ((*p++ = *q++) != '\0')
- {
- /* nop */
- }
- }
-
- /* skip blank lines */
- if (*buf == '\0')
- {
- continue;
- }
-
- /* allocate a new node */
- if ((b = zalloc(sizeof(*b))) == NULL)
- {
- fclose(fp);
- goto load_trustfile_error;
- }
-
- /* add it to the list */
- b->next = bl->next;
- bl->next = b;
-
- b->reject = reject;
-
- /* Save the URL pattern */
- if (create_url_spec(b->url, buf))
- {
- fclose(fp);
- goto load_trustfile_error;
- }
-
- /*
- * save a pointer to URL's spec in the list of trusted URL's, too
- */
- if (trusted)
- {
- *tl++ = b->url;
- /* FIXME BUFFER OVERFLOW if >=64 entries */
- }
- }
-
- *tl = NULL;
-
- fclose(fp);
-
- /* the old one is now obsolete */
- if (current_trustfile)
- {
- current_trustfile->unloader = unload_trustfile;
- }
-
- fs->next = files->next;
- files->next = fs;
- current_trustfile = fs;
-
- if (csp)
- {
- csp->tlist = fs;
- }
-
- return(0);
-
-load_trustfile_error:
- log_error(LOG_LEVEL_FATAL, "can't load trustfile '%s': %E",
- csp->config->trustfile);
- return(-1);
-
-}
-#endif /* def FEATURE_TRUST */
-
-
-/*********************************************************************
- *
- * Function : unload_re_filterfile
- *
- * Description : Unload the re_filter list by freeing all chained
- * re_filterfile specs and their data.
- *
- * Parameters :
- * 1 : f = the data structure associated with the filterfile.
- *
- * Returns : N/A
- *
- *********************************************************************/
-static void unload_re_filterfile(void *f)
-{
- struct re_filterfile_spec *a, *b = (struct re_filterfile_spec *)f;
-
- while (b != NULL)
- {
- a = b->next;
-
- destroy_list(b->patterns);
- pcrs_free_joblist(b->joblist);
- freez(b->name);
- freez(b->description);
- freez(b);
-
- b = a;
- }
-
- return;
-}
-
-
-#ifdef FEATURE_GRACEFUL_TERMINATION
-/*********************************************************************
- *
- * Function : unload_current_re_filterfile
- *
- * Description : Unloads current re_filter file - reset to state at
- * beginning of program.
- *
- * Parameters : None
- *
- * Returns : N/A
- *
- *********************************************************************/
-void unload_current_re_filterfile(void)
-{
- if (current_re_filterfile)
- {
- current_re_filterfile->unloader = unload_re_filterfile;
- current_re_filterfile = NULL;
- }
-}
-#endif
-
-
-/*********************************************************************
- *
- * Function : load_re_filterfile
- *
- * Description : Load the re_filterfile.
- * Generate a chained list of re_filterfile_spec's from
- * the "FILTER: " blocks, compiling all their substitutions
- * into chained lists of pcrs_job structs.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : 0 => Ok, everything else is an error.
- *
- *********************************************************************/
-int load_re_filterfile(struct client_state *csp)
-{
- FILE *fp;
-
- struct re_filterfile_spec *new_bl, *bl = NULL;
- struct file_list *fs;
-
- char buf[BUFFER_SIZE];
- int error;
- unsigned long linenum = 0;
- pcrs_job *dummy, *lastjob = NULL;
-
- /*
- * No need to reload if unchanged
- */
- if (!check_file_changed(current_re_filterfile, csp->config->re_filterfile, &fs))
- {
- if (csp)
- {
- csp->rlist = current_re_filterfile;
- }
- return(0);
- }
- if (!fs)
- {
- goto load_re_filterfile_error;
- }
-
- /*
- * Open the file or fail
- */
- if ((fp = fopen(csp->config->re_filterfile, "r")) == NULL)
- {
- goto load_re_filterfile_error;
- }
-
- /*
- * Read line by line
- */
- while (read_config_line(buf, sizeof(buf), fp, &linenum) != NULL)
- {
- /*
- * If this is the head of a new filter block, make it a
- * re_filterfile spec of its own and chain it to the list:
- */
- if (strncmp(buf, "FILTER:", 7) == 0)
- {
- new_bl = (struct re_filterfile_spec *)zalloc(sizeof(*bl));
- if (new_bl == NULL)
- {
- goto load_re_filterfile_error;
- }
-
- new_bl->name = chomp(buf + 7);
-
- if (NULL != (new_bl->description = strchr(new_bl->name, ' ')))
- {
- *new_bl->description++ = '\0';
- new_bl->description = strdup(chomp(new_bl->description));
- }
- else
- {
- new_bl->description = strdup("No description available for this filter");
- }
-
- new_bl->name = strdup(chomp(new_bl->name));
-
- /*
- * If this is the first filter block, chain it
- * to the file_list rather than its (nonexistant)
- * predecessor
- */
- if (fs->f == NULL)
- {
- fs->f = new_bl;
- }
- else
- {
- bl->next = new_bl;
- }
- bl = new_bl;
-
- log_error(LOG_LEVEL_RE_FILTER, "Reading in filter \"%s\" (\"%s\")", bl->name, bl->description);
-
- continue;
- }
-
- /*
- * Else, save the expression, make it a pcrs_job
- * and chain it into the current filter's joblist
- */
- if (bl != NULL)
- {
- enlist(bl->patterns, buf);
-
- if ((dummy = pcrs_compile_command(buf, &error)) == NULL)
- {
- log_error(LOG_LEVEL_ERROR,
- "Adding re_filter job %s to filter %s failed with error %d.", buf, bl->name, error);
- continue;
- }
- else
- {
- if (bl->joblist == NULL)
- {
- bl->joblist = dummy;
- }
- else
- {
- lastjob->next = dummy;
- }
- lastjob = dummy;
- log_error(LOG_LEVEL_RE_FILTER, "Adding re_filter job %s to filter %s succeeded.", buf, bl->name);
- }
- }
- else
- {
- log_error(LOG_LEVEL_ERROR, "Ignoring job %s outside filter block in %s, line %d", buf, csp->config->re_filterfile, linenum);
- }
- }
-
- fclose(fp);
-
- /*
- * Schedule the now-obsolete old data for unloading
- */
- if ( NULL != current_re_filterfile )
- {
- current_re_filterfile->unloader = unload_re_filterfile;
- }
-
- /*
- * Chain this file into the global list of loaded files
- */
- fs->next = files->next;
- files->next = fs;
- current_re_filterfile = fs;
-
- if (csp)
- {
- csp->rlist = fs;
- }
-
- return( 0 );
-
-load_re_filterfile_error:
- log_error(LOG_LEVEL_FATAL, "can't load re_filterfile '%s': %E",
- csp->config->re_filterfile);
- return(-1);
-
-}
-
-
-/*********************************************************************
- *
- * Function : add_loader
- *
- * Description : Called from `load_config'. Called once for each input
- * file found in config.
- *
- * Parameters :
- * 1 : loader = pointer to a function that can parse and load
- * the appropriate config file.
- * 2 : config = The configuration_spec to add the loader to.
- *
- * Returns : N/A
- *
- *********************************************************************/
-void add_loader(int (*loader)(struct client_state *),
- struct configuration_spec * config)
-{
- int i;
-
- for (i=0; i < NLOADERS; i++)
- {
- if (config->loaders[i] == NULL)
- {
- config->loaders[i] = loader;
- break;
- }
- }
-
-}
-
-
-/*********************************************************************
- *
- * Function : run_loader
- *
- * Description : Called from `load_config' and `listen_loop'. This
- * function keeps the "csp" current with any file mods
- * since the last loop. If a file is unchanged, the
- * loader functions do NOT reload the file.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * Must be non-null. Reads: "csp->config"
- * Writes: various data members.
- *
- * Returns : 0 => Ok, everything else is an error.
- *
- *********************************************************************/
-int run_loader(struct client_state *csp)
-{
- int ret = 0;
- int i;
-
- for (i=0; i < NLOADERS; i++)
- {
- if (csp->config->loaders[i] == NULL)
- {
- break;
- }
- ret |= (csp->config->loaders[i])(csp);
- }
- return(ret);
-
-}
-
-
-/*
- Local Variables:
- tab-width: 3
- end:
-*/
projects / privoxy.git / blobdiff