]>
git.ipfire.org Git - thirdparty/squid.git/blob - tools/purge/purge.cc
4 // Author: Jens-S. V?ckler <voeckler@rvs.uni-hannover.de>
9 // (c) 1999 Lehrgebiet Rechnernetze und Verteilte Systeme
10 // Universit?t Hannover, Germany
12 // Permission to use, copy, modify, distribute, and sell this software
13 // and its documentation for any purpose is hereby granted without fee,
14 // provided that (i) the above copyright notices and this permission
15 // notice appear in all copies of the software and related documentation,
16 // and (ii) the names of the Lehrgebiet Rechnernetze und Verteilte
17 // Systeme and the University of Hannover may not be used in any
18 // advertising or publicity relating to the software without the
19 // specific, prior written permission of Lehrgebiet Rechnernetze und
20 // Verteilte Systeme and the University of Hannover.
22 // THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
23 // EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
24 // WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
26 // IN NO EVENT SHALL THE LEHRGEBIET RECHNERNETZE UND VERTEILTE SYSTEME OR
27 // THE UNIVERSITY OF HANNOVER BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
28 // INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES
29 // WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT
30 // ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY,
31 // ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
34 // Revision 1.17 2000/09/21 10:59:53 cached
35 // *** empty log message ***
37 // Revision 1.16 2000/09/21 09:45:18 cached
38 // Fixed some small bugs.
40 // Revision 1.15 2000/09/21 09:05:56 cached
41 // added multi cache_dir support, thus changing -c cmdline option.
42 // modified file reading to support /dev/fd/0 reading for non-disclosed items.
44 // Revision 1.14 2000/06/20 09:43:01 voeckler
45 // added FreeBSD related fixes and support.
47 // Revision 1.13 2000/03/29 08:12:21 voeckler
48 // fixed wrong header file.
50 // Revision 1.12 2000/03/29 07:54:41 voeckler
51 // added mechanism to give a port specification precedence over a host
52 // specificiation with the -p option and not colon.
54 // Revision 1.11 1999/06/18 13:18:28 voeckler
55 // added refcount, fixed missing LF in -s output.
57 // Revision 1.10 1999/06/16 13:06:05 voeckler
58 // reversed meaning of -M flag.
60 // Revision 1.9 1999/06/15 21:11:53 voeckler
61 // added extended logging feature which extract the squid meta data available
62 // within the disk files. moved the content extraction and squid meta data
63 // handling parts into separate files. added options for copy-out and verbose.
65 // Revision 1.8 1999/06/14 20:14:46 voeckler
66 // intermediate version when adding understanding about the way
67 // Squid does log the metadata into the file.
69 // Revision 1.7 1999/01/23 21:01:10 root
70 // stumbled over libc5 header/lib inconsistency bug....
72 // Revision 1.6 1999/01/23 20:47:54 root
73 // added Linux specifics for psignal...
76 // Revision 1.5 1999/01/20 09:48:12 voeckler
77 // added warning as first line of output.
79 // Revision 1.4 1999/01/19 11:53:49 voeckler
80 // added psignal() from <siginfo.h> handling.
82 // Revision 1.3 1999/01/19 11:00:50 voeckler
83 // added keyboard interrupt handling, exit handling, removed C++ strings and
84 // regular expression syntax in favour of less source code, added comments,
85 // added a reminder to remove swap.state in case of unlinks, added IAA flag,
86 // added a few assertions, changed policy to enforce the definition of at
87 // least one regular expression, and catch a few signals.
89 // Revision 1.2 1999/01/15 23:06:28 voeckler
90 // downgraded to simple C strings...
92 // Revision 1.1 1999/01/14 12:05:32 voeckler
96 #if defined(__GNUC__) || defined(__GNUG__)
97 #pragma implementation
104 //#include <assert.h>
110 //#include <sys/types.h>
111 #include <sys/stat.h>
112 #include <sys/wait.h>
124 #include <netinet/in.h>
125 #include <netinet/tcp.h> // TCP_NODELAY
126 #include <arpa/inet.h>
127 #include <netdb.h> // gethostbyname()
130 #include "convert.hh"
133 #include "squid-tlv.hh"
134 #include "copyout.hh"
135 #include "conffile.hh"
138 #define DEFAULTHOST "localhost"
139 #endif // DEFAULTHOST
142 #define DEFAULTPORT 3128
143 #endif // DEFAULTPORT
145 volatile sig_atomic_t term_flag
= 0; // 'terminate' is a gcc 2.8.x internal...
146 char* linebuffer
= 0;
147 size_t buffersize
= 16834;
148 static char* copydir
= 0;
149 static unsigned debug
= 0;
150 static unsigned purgeMode
= 0;
151 static bool iamalive
= false;
152 static bool reminder
= false;
153 static bool verbose
= false;
154 static bool envelope
= false;
155 static bool no_fork
= false;
156 static const char* programname
= 0;
157 static const char* RCS_ID
= "$Id$";
159 // ----------------------------------------------------------------------
162 REList( const char* what
, bool doCase
);
164 bool match( const char* check
) const;
171 REList::REList( const char* what
, bool doCase
)
172 :next(0),data(xstrdup(what
))
174 int result
= regcomp( &rexp
, what
,
175 REG_EXTENDED
| REG_NOSUB
| (doCase
? 0 : REG_ICASE
) );
178 regerror( result
, &rexp
, buffer
, 256 );
179 fprintf( stderr
, "unable to compile re \"%s\": %s\n", what
, buffer
);
186 if ( next
) delete next
;
187 if ( data
) free((void*) data
);
192 REList::match( const char* check
) const
194 int result
= regexec( &rexp
, check
, 0, 0, 0 );
195 if ( result
!= 0 && result
!= REG_NOMATCH
) {
197 regerror( result
, &rexp
, buffer
, 256 );
198 fprintf( stderr
, "unable to execute re \"%s\"\n+ on line \"%s\": %s\n",
199 data
, check
, buffer
);
202 return ( result
== 0 );
205 // ----------------------------------------------------------------------
208 concat( const char* start
, ... )
209 // purpose: concatinate an arbitrary number of C strings.
210 // paramtr: start (IN): first C string
211 // ... (IN): further C strings, terminated with a NULL pointer
212 // returns: memory allocated via new(), containing the concatinated string.
217 // first run: determine size
218 unsigned size
= strlen(start
)+1;
219 va_start( ap
, start
);
220 while ( (s
=va_arg(ap
,const char*)) != NULL
) size
+= strlen(s
? s
: "");
224 char* result
= new char[size
];
226 perror( "string memory allocation" );
230 // second run: copy content
231 strcpy( result
, start
);
232 va_start( ap
, start
);
233 while ( (s
=va_arg(ap
,const char*)) != NULL
) strcat( result
, s
);
240 isxstring( const char* s
, size_t testlen
)
241 // purpose: test a string for conforming to xdigit
242 // paramtr: s (IN): string to test
243 // testlen (IN): length the string must have
244 // returns: true, iff strlen(s)==testlen && all_x_chars(s), false otherwise
246 if ( strlen(s
) != testlen
) return false;
249 while ( i
<testlen
&& isxdigit(s
[i
]) ) i
++;
255 log_output( const char* fn
, int code
, long size
, const char* url
)
257 return printf( "%s %3d %8ld %s\n", fn
, code
, size
, url
);
262 log_extended( const char* fn
, int code
, long size
, const SquidMetaList
* meta
)
264 static const char hexdigit
[] = "0123456789ABCDEF";
266 const SquidTLV
* findings
= 0;
268 if ( meta
&& (findings
= meta
->search( STORE_META_KEY_MD5
)) ) {
269 unsigned char* s
= (unsigned char*) findings
->data
;
270 for ( int j
=0; j
<16; j
++, s
++ ) {
271 md5
[j
*2+0] = hexdigit
[ *s
>> 4 ];
272 md5
[j
*2+1] = hexdigit
[ *s
& 15 ];
274 md5
[32] = '\0'; // terminate string
276 sprintf( md5
, "%-32s", "(no_md5_data_available)" );
280 if ( meta
&& (findings
= meta
->search( STORE_META_STD
)) ) {
282 // make data aligned, avoid SIGBUS on RISC machines (ARGH!)
283 memcpy( &temp
, findings
->data
, sizeof(StoreMetaStd
) );
284 sprintf( timeb
, "%08x %08x %08x %08x %04x %5hu ",
285 temp
.timestamp
, temp
.lastref
,
286 temp
.expires
, temp
.lastmod
, temp
.flags
, temp
.refcount
);
287 } else if ( meta
&& (findings
= meta
->search( STORE_META_STD_LFS
)) ) {
288 StoreMetaStdLFS temp
;
289 // make data aligned, avoid SIGBUS on RISC machines (ARGH!)
290 memcpy( &temp
, findings
->data
, sizeof(StoreMetaStd
) );
291 sprintf( timeb
, "%08x %08x %08x %08x %04x %5hu ",
292 temp
.timestamp
, temp
.lastref
,
293 temp
.expires
, temp
.lastmod
, temp
.flags
, temp
.refcount
);
295 sprintf( timeb
, "%08x %08x %08x %08x %04x %5hu ", -1, -1, -1, -1, 0, 0 );
298 // make sure that there is just one printf()
299 if ( meta
&& (findings
= meta
->search( STORE_META_URL
)) ) {
300 return printf( "%s %3d %8ld %s %s %s\n",
301 fn
, code
, size
, md5
, timeb
, findings
->data
);
303 return printf( "%s %3d %8ld %s %s strange_file\n",
304 fn
, code
, size
, md5
, timeb
);
308 // o.k., this is pure lazyness...
309 static struct in_addr serverHost
;
310 static unsigned short serverPort
;
313 action( int fd
, size_t metasize
,
314 const char* fn
, const char* url
, const SquidMetaList
& meta
)
315 // purpose: if cmdline-requested, send the purge request to the cache
316 // paramtr: fd (IN): open FD for the object file
317 // metasize (IN): offset into data portion of file (meta data size)
318 // fn (IN): name of the object file
319 // url (IN): URL string stored in the object file
320 // meta (IN): list containing further meta data
321 // returns: true for a successful action, false otherwise. The action
322 // may just print the file, send the purge request or even
323 // remove unwanted files.
324 // globals: ::purgeMode (IN): bit#0 set -> send purge request.
325 // bit#1 set -> remove 404 object files.
326 // ::serverHost (IN): cache host address
327 // ::serverPort (IN): cache port number
329 static const char* schablone
= "PURGE %s HTTP/1.0\r\nAccept: */*\r\n\r\n";
331 long size
= ( fstat(fd
,&st
) == -1 ? -1 : long(st
.st_size
- metasize
) );
334 // if we want to copy out the file, do that first of all.
335 if ( ::copydir
&& *copydir
&& size
> 0 )
336 copy_out( st
.st_size
, metasize
, ::debug
,
337 fn
, url
, ::copydir
, ::envelope
);
339 // do we need to PURGE the file, yes, if purgemode bit#0 was set.
340 if ( ::purgeMode
& 0x01 ) {
341 unsigned long bufsize
= strlen(url
) + strlen(schablone
) + 4;
342 char* buffer
= new char[bufsize
];
344 sprintf( buffer
, schablone
, url
);
345 int sockfd
= connectTo( serverHost
, serverPort
, true );
346 if ( sockfd
== -1 ) {
347 fprintf( stderr
, "unable to connect to server: %s\n", strerror(errno
) );
352 int size
= strlen(buffer
);
353 if ( write( sockfd
, buffer
, size
) != size
) {
354 // error while talking to squid
355 fprintf( stderr
, "unable to talk to server: %s\n", strerror(errno
) );
360 memset( buffer
+8, 0, 4 );
361 if ( read( sockfd
, buffer
, bufsize
) < 1 ) {
362 // error while reading squid's answer
363 fprintf( stderr
, "unable to read answer: %s\n", strerror(errno
) );
369 status
= strtol(buffer
+8,0,10);
373 // log the output of our operation
375 if ( ::verbose
) flag
= ( log_extended( fn
, status
, size
, &meta
) >= 0 );
376 else flag
= ( log_output( fn
, status
, size
, url
) >= 0 );
378 // remove the file, if purgemode bit#1, and HTTP result status 404).
379 if ( (::purgeMode
& 0x02) && status
== 404 ) {
381 if ( unlink(fn
) == -1 )
382 // error while unlinking file, this may happen due to the cache
383 // unlinking a file while it is still in the readdir() cache of purge.
384 fprintf( stderr
, "WARNING: unable to unlink %s: %s\n",
385 fn
, strerror(errno
) );
392 match( const char* fn
, const REList
* list
)
393 // purpose: do something with the given cache content filename
394 // paramtr: fn (IN): filename of cache file
395 // returns: true for successful action, false otherwise.
396 // warning: only return false, if you want the loop to terminate!
398 static const size_t addon
= sizeof(unsigned char) + sizeof(unsigned int);
401 if ( debug
& 0x01 ) fprintf( stderr
, "# [3] %s\n", fn
);
402 int fd
= open( fn
, O_RDONLY
);
404 if ( read(fd
,::linebuffer
,::buffersize
-1) > 60 ) {
405 ::linebuffer
[ ::buffersize
-1 ] = '\0'; // force-terminate string
407 // check the offset into the start of object data. The offset is
408 // stored in a host endianess after the first byte.
409 unsigned int datastart
;
410 memcpy( &datastart
, ::linebuffer
+ 1, sizeof(unsigned int) );
411 if ( datastart
> ::buffersize
- addon
- 1 ) {
412 // check offset into server reply header (start of cache data).
413 fputs( "WARNING: Using a truncated URL string.\n", stderr
);
414 datastart
= ::buffersize
- addon
- 1;
417 // NEW: Parse squid meta data, which is a kind of linked list
418 // flattened out into a file byte stream. Somewhere within is
419 // the URL as part of the list. First, gobble all meta data.
420 unsigned int offset
= addon
;
422 while ( offset
+ addon
<= datastart
) {
423 unsigned int size
= 0;
424 memcpy( &size
, linebuffer
+offset
+sizeof(char), sizeof(unsigned int) );
425 meta
.append( SquidMetaType(*(linebuffer
+offset
)),
426 size
, linebuffer
+offset
+addon
);
427 offset
+= ( addon
+ size
);
430 // Now extract the key URL from the meta data.
431 const SquidTLV
* urlmeta
= meta
.search( STORE_META_URL
);
433 // found URL in meta data. Try to process the URL
435 flag
= action( fd
, datastart
, fn
, (char*) urlmeta
->data
, meta
);
437 REList
* head
= (REList
*) list
; // YUCK!
438 while ( head
!= 0 ) {
439 if ( head
->match( (char*) urlmeta
->data
) ) break;
443 flag
= action( fd
, datastart
, fn
, (char*) urlmeta
->data
, meta
);
448 // "meta" will be deleted when exiting from this block
450 // weird file, FIXME: stat() it!
452 long size
= ( fstat(fd
,&st
) == -1 ? -1 : st
.st_size
);
453 if ( ::verbose
) flag
= ( log_extended( fn
, -1, size
, 0 ) >= 0 );
454 else flag
= ( log_output( fn
, -1, size
, "strange file" ) >= 0 );
456 if ( (::purgeMode
& 0x04) ) {
458 if ( unlink(fn
) == -1 )
459 // error while unlinking file, this may happen due to the cache
460 // unlinking a file while it is in the readdir() cache of purge.
461 fprintf( stderr
, "WARNING: unable to unlink %s: %s\n",
462 fn
, strerror(errno
) );
467 // error while opening file, this may happen due to the cache
468 // unlinking a file while it is still in the readdir() cache of purge.
469 fprintf( stderr
, "WARNING: open \"%s\": %s\n", fn
, strerror(errno
) );
476 filelevel( const char* directory
, const REList
* list
)
477 // purpose: from given starting point, look for squid xxxxxxxx files.
478 // example: "/var/spool/cache/08/7F" as input, do action over files
479 // paramtr: directory (IN): starting point
480 // list (IN): list of rexps to match URLs against
481 // returns: true, if every subdir && action was successful.
483 struct dirent
* entry
;
485 fprintf( stderr
, "# [2] %s\n", directory
);
487 DIR* dir
= opendir( directory
);
489 fprintf( stderr
, "unable to open directory \"%s\": %s\n",
490 directory
, strerror(errno
) );
494 // display a rotating character as "i am alive" signal (slows purge).
496 static char alivelist
[4][3] = { "\\\b", "|\b", "/\b", "-\b" };
497 static unsigned short alivecount
= 0;
498 assert( write( STDOUT_FILENO
, alivelist
[alivecount
++ & 3], 2 ) == 2 );
502 while ( (entry
=readdir(dir
)) && flag
) {
503 if ( isxstring(entry
->d_name
,8) ) {
504 char* name
= concat( directory
, "/", entry
->d_name
, 0 );
505 flag
= match( name
, list
);
515 dirlevel( const char* dirname
, const REList
* list
, bool level
=false )
516 // purpose: from given starting point, look for squid 00..FF directories.
517 // paramtr: dirname (IN): starting point
518 // list (IN): list of rexps to match URLs against
519 // level (IN): false==toplevel, true==1st level
520 // example: "/var/spool/cache", false as input, traverse subdirs w/ action.
521 // example: "/var/spool/cache/08", true as input, traverse subdirs w/ action.
522 // returns: true, if every subdir && action was successful.
523 // warning: this function is once-recursive, no deeper.
525 struct dirent
* entry
;
527 fprintf( stderr
, "# [%d] %s\n", (level
? 1 : 0), dirname
);
529 DIR* dir
= opendir( dirname
);
531 fprintf( stderr
, "unable to open directory \"%s\": %s\n",
532 dirname
, strerror(errno
) );
537 while ( (entry
=readdir(dir
)) && flag
) {
538 if ( strlen(entry
->d_name
) == 2 &&
539 isxdigit(entry
->d_name
[0]) &&
540 isxdigit(entry
->d_name
[1]) ) {
541 char* name
= concat( dirname
, "/", entry
->d_name
, 0 );
542 flag
= level
? filelevel( name
, list
) : dirlevel( name
, list
, true );
552 checkForPortOnly( const char* optarg
)
553 // purpose: see if somebody just put in a port instead of a hostname
554 // paramtr: optarg (IN): argument from commandline
555 // returns: 0..65535 is the valid port number in network byte order,
558 // if there is a period in there, it must be a valid hostname
559 if ( strchr( optarg
, '.' ) != 0 ) return -1;
561 // if it is just a number between 0 and 65535, it must be a port
563 unsigned long result
= strtoul( optarg
, &errstr
, 0 );
564 if ( result
< 65536 && errstr
!= optarg
) return htons(result
);
567 // one last try, test for a symbolical service name
568 struct servent
* service
= getservbyname( optarg
, "tcp" );
569 return service
? service
->s_port
: -1;
577 // purpuse: write help message and exit
579 printf( "\n%s\nUsage:\t%s\t[-a] [-c cf] [-d l] [-(f|F) fn | -(e|E) re] "
580 "[-p h[:p]]\n\t\t[-P #] [-s] [-v] [-C dir [-H]] [-n]\n\n",
581 ::RCS_ID
, ::programname
);
583 " -a\tdisplay a little rotating thingy to indicate that I am alive (tty only).\n"
584 " -c c\tsquid.conf location, default \"%s\".\n"
585 " -C dir\tbase directory for content extraction (copy-out mode).\n"
586 " -d l\tdebug level, an OR of different debug options.\n"
587 " -e re\tsingle regular expression per -e instance (use quotes!).\n"
588 " -E re\tsingle case sensitive regular expression like -e.\n"
589 " -f fn\tname of textfile containing one regular expression per line.\n"
590 " -F fn\tname of textfile like -f containing case sensitive REs.\n"
591 " -H\tprepend HTTP reply header to destination files in copy-out mode.\n"
592 " -n\tdo not fork() when using more than one cache_dir.\n"
593 " -p h:p\tcache runs on host h and optional port p, default is %s:%u.\n"
594 " -P #\tif 0, just print matches; otherwise OR the following purge modes:\n"
595 "\t 0x01 really send PURGE to the cache.\n"
596 "\t 0x02 remove all caches files reported as 404 (not found).\n"
597 "\t 0x04 remove all weird (inaccessible or too small) cache files.\n"
598 "\t0 and 1 are recommended - slow rebuild your cache with other modes.\n"
599 " -s\tshow all options after option parsing, but before really starting.\n"
600 " -v\tshow more information about the file, e.g. MD5, timestamps and flags.\n"
601 "\n", DEFAULT_SQUID_CONF
, DEFAULTHOST
, DEFAULTPORT
);
606 parseCommandline( int argc
, char* argv
[], REList
*& head
,
607 char*& conffile
, char*& copydir
,
608 struct in_addr
& serverHost
, unsigned short& serverPort
)
609 // paramtr: argc: see ::main().
610 // argv: see ::main().
611 // returns: Does terminate the program on errors!
612 // purpose: suck in any commandline options, and set the global vars.
614 int option
, port
, showme
= 0;
619 if ( (ptr
= strrchr(argv
[0],'/')) == NULL
) ptr
=argv
[0];
623 // extract commandline parameters
624 REList
* tail
= head
= 0;
626 while ( (option
= getopt( argc
, argv
, "ac:C:d:E:e:F:f:Hnp:P:sv" )) != -1 ) {
629 ::iamalive
= ! ::iamalive
;
632 if ( optarg
&& *optarg
) {
633 if ( copydir
) free( (void*) copydir
);
634 assert( (copydir
= xstrdup(optarg
)) );
638 if ( optarg
&& *optarg
) {
639 if ( *conffile
) free((void*) conffile
);
640 assert( (conffile
= xstrdup(optarg
)) );
645 ::debug
= strtoul( optarg
, 0, 0 );
650 if ( head
== 0 ) tail
= head
= new REList( optarg
, option
=='E' );
652 tail
->next
= new REList( optarg
, option
=='E' );
658 if ( (rfile
= fopen( optarg
, "r" )) != NULL
) {
659 unsigned long lineno
= 0;
662 while ( fgets( line
, LINESIZE
, rfile
) != NULL
) {
664 int len
= strlen(line
)-1;
665 if ( len
+2 >= LINESIZE
) {
666 fprintf( stderr
, "%s:%lu: line too long, sorry.\n",
671 // remove trailing line breaks
672 while ( len
> 0 && ( line
[len
] == '\n' || line
[len
] == '\r' ) )
675 // insert into list of expressions
676 if ( head
== 0 ) tail
= head
= new REList(line
,option
=='F');
678 tail
->next
= new REList(line
,option
=='F');
684 fprintf( stderr
, "unable to open %s: %s\n", optarg
, strerror(errno
));
688 ::envelope
= ! ::envelope
;
691 ::no_fork
= ! ::no_fork
;
694 colon
= strchr( optarg
, ':' );
696 // no colon, only look at host
698 // fix: see if somebody just put in there a port (no periods)
699 // give port number precedence over host names
700 port
= checkForPortOnly( optarg
);
702 // assume that main() did set the default port
703 if ( convertHostname(optarg
,serverHost
) == -1 ) {
704 fprintf( stderr
, "unable to resolve host %s!\n", optarg
);
708 // assume that main() did set the default host
712 // colon used, port is extra
714 if ( convertHostname(optarg
,serverHost
) == -1 ) {
715 fprintf( stderr
, "unable to resolve host %s!\n", optarg
);
718 if ( convertPortname(colon
,serverPort
) == -1 ) {
719 fprintf( stderr
, "unable to resolve port %s!\n", colon
);
725 ::purgeMode
= ( strtol( optarg
, 0, 0 ) & 0x07 );
731 ::verbose
= ! ::verbose
;
741 if ( ! isatty(fileno(stdout
)) || (::debug
& 0x01) ) ::iamalive
= false;
743 fputs( "There was no regular expression defined. If you intend\n", stderr
);
744 fputs( "to match all possible URLs, use \"-e .\" instead.\n", stderr
);
748 // postcondition: head != 0
751 // make sure that the copy out directory is there and accessible
752 if ( copydir
&& *copydir
)
753 if ( assert_copydir( copydir
) != 0 ) exit(1);
757 printf( "#\n# Currently active values for %s:\n# %s\n",
758 ::programname
, ::RCS_ID
);
759 printf( "# Debug level : " );
760 if ( ::debug
) printf( "%#6.4hx", ::debug
);
761 else printf( "production level" ); // printf omits 0x prefix for 0!
762 printf( " + %s mode", ::no_fork
? "linear" : "parallel" );
763 puts( ::verbose
? " + extra verbosity" : "" );
765 printf( "# Copy-out directory: %s ",
766 copydir
? copydir
: "copy-out mode disabled" );
768 printf( "(%s HTTP header)\n", ::envelope
? "prepend" : "no" );
772 printf( "# Squid config file : %s\n", conffile
);
773 printf( "# Cacheserveraddress: %s:%u\n",
774 inet_ntoa( serverHost
), ntohs( serverPort
) );
775 printf( "# purge mode : 0x%02x\n", ::purgeMode
);
776 printf( "# Regular expression: " );
779 for ( tail
= head
; tail
!= NULL
; tail
= tail
->next
) {
780 if ( count
++ ) printf( "#%22u", count
);
781 #if defined(LINUX) && putc==_IO_putc
782 // I HATE BROKEN LINUX HEADERS!
783 // purge.o(.text+0x1040): undefined reference to `_IO_putc'
784 // If your compilation breaks here, remove the undefinition
788 printf( " \"%s\"\n", tail
->data
);
800 if ( ::term_flag
) psignal( ::term_flag
, "received signal" );
801 delete[] ::linebuffer
;
804 "WARNING! Caches files were removed. Please shut down your cache, remove\n"
805 "your swap.state files and restart your cache again, i.e. effictively do\n"
806 "a slow rebuild your cache! Otherwise your squid *will* choke!\n", stderr
);
812 handler( int signo
) {
814 if ( getpid() == getpgrp() ) kill( -getpgrp(), signo
);
822 makelinebuffered( FILE* fp
, const char* fn
= 0 )
823 // purpose: make the given FILE line buffered
824 // paramtr: fp (IO): file pointer which to put into line buffer mode
825 // fn (IN): name of file to print in case of error
826 // returns: 0 is ok, -1 to indicate an error
827 // warning: error messages will already be printed
829 if ( setvbuf( fp
, 0, _IOLBF
, 0 ) == 0 ) {
834 fprintf( stderr
, "unable to make \"%s\" line buffered: %s\n",
835 fn
? fn
: "", strerror(errno
) );
841 main( int argc
, char* argv
[] )
845 char* conffile
= xstrdup( DEFAULT_SQUID_CONF
);
846 serverPort
= htons(DEFAULTPORT
);
847 if ( convertHostname(DEFAULTHOST
,serverHost
) == -1 ) {
848 fprintf( stderr
, "unable to resolve host %s!\n", DEFAULTHOST
);
853 ::linebuffer
= new char[ ::buffersize
];
854 assert( ::linebuffer
!= 0 );
857 puts( "### Use at your own risk! No guarantees whatsoever. You were warned. ###");
858 parseCommandline( argc
, argv
, list
, conffile
, ::copydir
,
859 serverHost
, serverPort
);
862 if ( atexit( exiter
) != 0 ||
863 Signal( SIGTERM
, handler
, true ) == SIG_ERR
||
864 Signal( SIGINT
, handler
, true ) == SIG_ERR
||
865 Signal( SIGHUP
, handler
, true ) == SIG_ERR
) {
866 perror( "unable to install signal/exit function" );
870 // try to read squid.conf file to determine all cache_dir locations
871 CacheDirVector
cdv(0);
872 if ( readConfigFile( cdv
, conffile
, debug
? stderr
: 0 ) > 0 ) {
873 // there are some valid cache_dir entries.
874 // unless forking was forbidden by cmdline option,
875 // for a process for each cache_dir entry to remove files.
877 if ( ::no_fork
|| cdv
.size() == 1 ) {
878 // linear mode, one cache_dir after the next
879 for ( CacheDirVector::iterator i
= cdv
.begin(); i
!= cdv
.end(); ++i
) {
880 // execute OR complain
881 if ( ! dirlevel(i
->base
,list
) )
882 fprintf( stderr
, "program terminated due to error: %s",
884 free((void*) i
->base
);
887 // parallel mode, all cache_dir in parallel
888 pid_t
* child
= new pid_t
[ cdv
.size() ];
890 // make stdout/stderr line bufferd
891 makelinebuffered( stdout
, "stdout" );
892 makelinebuffered( stderr
, "stderr" );
894 // make parent process group leader for easier killings
895 if ( setpgid(getpid(), getpid()) != 0 ) {
896 perror( "unable to set process group leader" );
900 // -a is mutually exclusive with fork mode
902 puts( "# i-am-alive flag incompatible with fork mode, resetting" );
906 for ( size_t i
=0; i
< cdv
.size(); ++i
) {
907 if ( getpid() == getpgrp() ) {
908 // only parent == group leader may fork off new processes
909 if ( (child
[i
]=fork()) < 0 ) {
910 // fork error, this is bad!
911 perror( "unable to fork" );
912 kill( -getpgrp(), SIGTERM
);
914 } else if ( child
[i
] == 0 ) {
916 // execute OR complain
917 if ( ! dirlevel(cdv
[i
].base
,list
) )
918 fprintf( stderr
, "program terminated due to error: %s\n",
920 free((void*) cdv
[i
].base
);
924 if ( ::debug
) printf( "forked child %d\n", (int) child
[i
] );
929 // collect the garbase
932 for ( size_t i
=0; i
< cdv
.size(); ++i
) {
933 while ( (temp
=waitpid( (pid_t
)-1, &status
, 0 )) == -1 )
934 if ( errno
== EINTR
) continue;
935 if ( ::debug
) printf( "collected child %d\n", (int) temp
);
940 fprintf( stderr
, "no cache_dir or error accessing \"%s\"\n", conffile
);
944 if ( copydir
) free( (void*) copydir
);
945 free((void*) conffile
);