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30a4f2a8 | 1 | /* |
d2af9477 | 2 | * $Id: main.cc,v 1.49 1996/07/11 17:42:44 wessels Exp $ |
30a4f2a8 | 3 | * |
4 | * DEBUG: section 1 Startup and Main Loop | |
5 | * AUTHOR: Harvest Derived | |
6 | * | |
7 | * SQUID Internet Object Cache http://www.nlanr.net/Squid/ | |
8 | * -------------------------------------------------------- | |
9 | * | |
10 | * Squid is the result of efforts by numerous individuals from the | |
11 | * Internet community. Development is led by Duane Wessels of the | |
12 | * National Laboratory for Applied Network Research and funded by | |
13 | * the National Science Foundation. | |
14 | * | |
15 | * This program is free software; you can redistribute it and/or modify | |
16 | * it under the terms of the GNU General Public License as published by | |
17 | * the Free Software Foundation; either version 2 of the License, or | |
18 | * (at your option) any later version. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, | |
21 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
22 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
23 | * GNU General Public License for more details. | |
24 | * | |
25 | * You should have received a copy of the GNU General Public License | |
26 | * along with this program; if not, write to the Free Software | |
27 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
28 | * | |
29 | */ | |
30 | ||
31 | /* | |
32 | * Copyright (c) 1994, 1995. All rights reserved. | |
33 | * | |
34 | * The Harvest software was developed by the Internet Research Task | |
35 | * Force Research Group on Resource Discovery (IRTF-RD): | |
36 | * | |
37 | * Mic Bowman of Transarc Corporation. | |
38 | * Peter Danzig of the University of Southern California. | |
39 | * Darren R. Hardy of the University of Colorado at Boulder. | |
40 | * Udi Manber of the University of Arizona. | |
41 | * Michael F. Schwartz of the University of Colorado at Boulder. | |
42 | * Duane Wessels of the University of Colorado at Boulder. | |
43 | * | |
44 | * This copyright notice applies to software in the Harvest | |
45 | * ``src/'' directory only. Users should consult the individual | |
46 | * copyright notices in the ``components/'' subdirectories for | |
47 | * copyright information about other software bundled with the | |
48 | * Harvest source code distribution. | |
49 | * | |
50 | * TERMS OF USE | |
51 | * | |
52 | * The Harvest software may be used and re-distributed without | |
53 | * charge, provided that the software origin and research team are | |
54 | * cited in any use of the system. Most commonly this is | |
55 | * accomplished by including a link to the Harvest Home Page | |
56 | * (http://harvest.cs.colorado.edu/) from the query page of any | |
57 | * Broker you deploy, as well as in the query result pages. These | |
58 | * links are generated automatically by the standard Broker | |
59 | * software distribution. | |
60 | * | |
61 | * The Harvest software is provided ``as is'', without express or | |
62 | * implied warranty, and with no support nor obligation to assist | |
63 | * in its use, correction, modification or enhancement. We assume | |
64 | * no liability with respect to the infringement of copyrights, | |
65 | * trade secrets, or any patents, and are not responsible for | |
66 | * consequential damages. Proper use of the Harvest software is | |
67 | * entirely the responsibility of the user. | |
68 | * | |
69 | * DERIVATIVE WORKS | |
70 | * | |
71 | * Users may make derivative works from the Harvest software, subject | |
72 | * to the following constraints: | |
73 | * | |
74 | * - You must include the above copyright notice and these | |
75 | * accompanying paragraphs in all forms of derivative works, | |
76 | * and any documentation and other materials related to such | |
77 | * distribution and use acknowledge that the software was | |
78 | * developed at the above institutions. | |
79 | * | |
80 | * - You must notify IRTF-RD regarding your distribution of | |
81 | * the derivative work. | |
82 | * | |
83 | * - You must clearly notify users that your are distributing | |
84 | * a modified version and not the original Harvest software. | |
85 | * | |
86 | * - Any derivative product is also subject to these copyright | |
87 | * and use restrictions. | |
88 | * | |
89 | * Note that the Harvest software is NOT in the public domain. We | |
90 | * retain copyright, as specified above. | |
91 | * | |
92 | * HISTORY OF FREE SOFTWARE STATUS | |
93 | * | |
94 | * Originally we required sites to license the software in cases | |
95 | * where they were going to build commercial products/services | |
96 | * around Harvest. In June 1995 we changed this policy. We now | |
97 | * allow people to use the core Harvest software (the code found in | |
98 | * the Harvest ``src/'' directory) for free. We made this change | |
99 | * in the interest of encouraging the widest possible deployment of | |
100 | * the technology. The Harvest software is really a reference | |
101 | * implementation of a set of protocols and formats, some of which | |
102 | * we intend to standardize. We encourage commercial | |
103 | * re-implementations of code complying to this set of standards. | |
104 | */ | |
44a47c6e | 105 | |
106 | #include "squid.h" | |
107 | ||
b8de7ebe | 108 | time_t squid_starttime = 0; |
44a47c6e | 109 | time_t next_cleaning = 0; |
30a4f2a8 | 110 | int theHttpConnection = -1; |
111 | int theInIcpConnection = -1; | |
112 | int theOutIcpConnection = -1; | |
090089c4 | 113 | int do_reuse = 1; |
d68adf86 | 114 | int opt_unlink_on_reload = 0; |
30a4f2a8 | 115 | int opt_reload_hit_only = 0; /* only UDP_HIT during store relaod */ |
090089c4 | 116 | int catch_signals = 1; |
30a4f2a8 | 117 | int opt_dns_tests = 1; |
118 | int opt_foreground_rebuild = 0; | |
090089c4 | 119 | int vhost_mode = 0; |
16128bc7 | 120 | int unbuffered_logs = 1; /* debug and hierarhcy unbuffered by default */ |
5f3f8d0e | 121 | int shutdown_pending = 0; /* set by SIGTERM handler (shut_down()) */ |
122 | int reread_pending = 0; /* set by SIGHUP handler */ | |
30a4f2a8 | 123 | char version_string[] = SQUID_VERSION; |
124 | char appname[] = "squid"; | |
125 | char localhost[] = "127.0.0.1"; | |
126 | struct in_addr local_addr; | |
127 | ||
128 | /* for error reporting from xmalloc and friends */ | |
129 | extern void (*failure_notify) _PARAMS((char *)); | |
130 | ||
131 | static int rotate_pending = 0; /* set by SIGUSR1 handler */ | |
132 | static int httpPortNumOverride = 1; | |
133 | static int icpPortNumOverride = 1; /* Want to detect "-u 0" */ | |
134 | #if MALLOC_DBG | |
4d64d74a | 135 | static int malloc_debug_level = 0; |
30a4f2a8 | 136 | #endif |
137 | static void rotate_logs _PARAMS((int)); | |
138 | static void reconfigure _PARAMS((int)); | |
ccff9601 | 139 | |
140 | static void usage() | |
141 | { | |
77ffc99f | 142 | fprintf(stderr, "\ |
30a4f2a8 | 143 | Usage: %s [-hsvzCDFRUVY] [-f config-file] [-[au] port]\n\ |
144 | -a port Specify ASCII port number (default: %d).\n\ | |
145 | -f file Use given config-file instead of\n\ | |
146 | %s\n\ | |
ccff9601 | 147 | -h Print help message.\n\ |
148 | -s Enable logging to syslog.\n\ | |
30a4f2a8 | 149 | -u port Specify UDP port number (default: %d), disable with 0.\n\ |
ccff9601 | 150 | -v Print version.\n\ |
151 | -z Zap disk storage -- deletes all objects in disk cache.\n\ | |
152 | -C Do not catch fatal signals.\n\ | |
153 | -D Disable initial DNS tests.\n\ | |
30a4f2a8 | 154 | -F Foreground fast store rebuild.\n\ |
ccff9601 | 155 | -R Do not set REUSEADDR on port.\n\ |
d68adf86 | 156 | -U Unlink expired objects on reload.\n\ |
30a4f2a8 | 157 | -V Virtual host httpd-accelerator.\n\ |
158 | -Y Only return UDP_HIT or UDP_DENIED during fast store reload.\n", | |
159 | appname, CACHE_HTTP_PORT, DefaultConfigFile, CACHE_ICP_PORT); | |
77ffc99f | 160 | exit(1); |
ccff9601 | 161 | } |
162 | ||
4d64d74a | 163 | static void mainParseOptions(argc, argv) |
090089c4 | 164 | int argc; |
4d64d74a | 165 | char *argv[]; |
090089c4 | 166 | { |
090089c4 | 167 | extern char *optarg; |
4d64d74a | 168 | int c; |
090089c4 | 169 | |
30a4f2a8 | 170 | while ((c = getopt(argc, argv, "CDFRUVYa:bf:hm:su:vz?")) != -1) { |
090089c4 | 171 | switch (c) { |
090089c4 | 172 | case 'C': |
173 | catch_signals = 0; | |
174 | break; | |
175 | case 'D': | |
30a4f2a8 | 176 | opt_dns_tests = 0; |
090089c4 | 177 | break; |
30a4f2a8 | 178 | case 'F': |
179 | opt_foreground_rebuild = 1; | |
090089c4 | 180 | break; |
090089c4 | 181 | case 'R': |
182 | do_reuse = 0; | |
183 | break; | |
d68adf86 | 184 | case 'U': |
185 | opt_unlink_on_reload = 1; | |
186 | break; | |
30a4f2a8 | 187 | case 'V': |
188 | vhost_mode = 1; | |
189 | break; | |
190 | case 'Y': | |
191 | opt_reload_hit_only = 1; | |
192 | break; | |
193 | case 'a': | |
194 | httpPortNumOverride = atoi(optarg); | |
195 | break; | |
196 | case 'b': | |
197 | unbuffered_logs = 0; | |
198 | break; | |
090089c4 | 199 | case 'f': |
00fac1f8 | 200 | xfree(ConfigFile); |
201 | ConfigFile = xstrdup(optarg); | |
090089c4 | 202 | break; |
30a4f2a8 | 203 | case 'h': |
204 | usage(); | |
090089c4 | 205 | break; |
090089c4 | 206 | case 'm': |
30a4f2a8 | 207 | #if MALLOC_DBG |
090089c4 | 208 | malloc_debug_level = atoi(optarg); |
209 | break; | |
30a4f2a8 | 210 | #else |
211 | fatal("Need to add -DMALLOC_DBG when compiling to use -m option"); | |
212 | #endif | |
213 | case 's': | |
214 | syslog_enable = 0; | |
215 | break; | |
216 | case 'u': | |
217 | icpPortNumOverride = atoi(optarg); | |
218 | if (icpPortNumOverride < 0) | |
219 | icpPortNumOverride = 0; | |
220 | break; | |
221 | case 'v': | |
222 | printf("Squid Cache: Version %s\n", version_string); | |
223 | exit(0); | |
224 | /* NOTREACHED */ | |
090089c4 | 225 | case 'z': |
226 | zap_disk_store = 1; | |
227 | break; | |
228 | case '?': | |
090089c4 | 229 | default: |
ccff9601 | 230 | usage(); |
090089c4 | 231 | break; |
232 | } | |
090089c4 | 233 | } |
4d64d74a | 234 | } |
090089c4 | 235 | |
30a4f2a8 | 236 | void rotate_logs(sig) |
237 | int sig; | |
238 | { | |
239 | debug(21, 1, "rotate_logs: SIGUSR1 received.\n"); | |
240 | rotate_pending = 1; | |
241 | #if !HAVE_SIGACTION | |
242 | signal(sig, rotate_logs); | |
243 | #endif | |
244 | } | |
245 | ||
246 | void reconfigure(sig) | |
247 | int sig; | |
248 | { | |
249 | debug(21, 1, "reconfigure: SIGHUP received\n"); | |
250 | debug(21, 1, "Waiting %d seconds for active connections to finish\n", | |
251 | getShutdownLifetime()); | |
252 | reread_pending = 1; | |
253 | #if !HAVE_SIGACTION | |
254 | signal(sig, reconfigure); | |
255 | #endif | |
256 | } | |
257 | ||
258 | void shut_down(sig) | |
259 | int sig; | |
260 | { | |
261 | debug(21, 1, "Preparing for shutdown after %d connections\n", | |
262 | ntcpconn + nudpconn); | |
263 | debug(21, 1, "Waiting %d seconds for active connections to finish\n", | |
264 | getShutdownLifetime()); | |
265 | shutdown_pending = 1; | |
266 | } | |
267 | ||
5f3f8d0e | 268 | void serverConnectionsOpen() |
4d64d74a | 269 | { |
30a4f2a8 | 270 | struct in_addr addr; |
271 | u_short port; | |
234967c9 | 272 | /* Get our real priviliges */ |
234967c9 | 273 | |
274 | /* Open server ports */ | |
30a4f2a8 | 275 | enter_suid(); |
276 | theHttpConnection = comm_open(COMM_NONBLOCKING, | |
277 | getTcpIncomingAddr(), | |
278 | getHttpPortNum(), | |
279 | "HTTP Port"); | |
280 | leave_suid(); | |
281 | if (theHttpConnection < 0) { | |
282 | fatal("Cannot open HTTP Port"); | |
090089c4 | 283 | } |
30a4f2a8 | 284 | fd_note(theHttpConnection, "HTTP socket"); |
285 | comm_listen(theHttpConnection); | |
286 | comm_set_select_handler(theHttpConnection, | |
090089c4 | 287 | COMM_SELECT_READ, |
288 | asciiHandleConn, | |
289 | 0); | |
30a4f2a8 | 290 | debug(1, 1, "Accepting HTTP connections on FD %d.\n", |
291 | theHttpConnection); | |
090089c4 | 292 | |
293 | if (!httpd_accel_mode || getAccelWithProxy()) { | |
30a4f2a8 | 294 | if ((port = getIcpPortNum()) > 0) { |
295 | theInIcpConnection = comm_open(COMM_NONBLOCKING | COMM_DGRAM, | |
296 | getUdpIncomingAddr(), | |
297 | port, | |
298 | "ICP Port"); | |
299 | if (theInIcpConnection < 0) | |
300 | fatal("Cannot open ICP Port"); | |
301 | fd_note(theInIcpConnection, "ICP socket"); | |
302 | comm_set_select_handler(theInIcpConnection, | |
090089c4 | 303 | COMM_SELECT_READ, |
304 | icpHandleUdp, | |
305 | 0); | |
30a4f2a8 | 306 | debug(1, 1, "Accepting ICP connections on FD %d.\n", |
307 | theInIcpConnection); | |
308 | ||
309 | if ((addr = getUdpOutgoingAddr()).s_addr != INADDR_NONE) { | |
310 | theOutIcpConnection = comm_open(COMM_NONBLOCKING | COMM_DGRAM, | |
311 | addr, | |
312 | port, | |
313 | "ICP Port"); | |
314 | if (theOutIcpConnection < 0) | |
315 | fatal("Cannot open Outgoing ICP Port"); | |
316 | comm_set_select_handler(theOutIcpConnection, | |
317 | COMM_SELECT_READ, | |
318 | icpHandleUdp, | |
319 | 0); | |
320 | debug(1, 1, "Accepting ICP connections on FD %d.\n", | |
321 | theOutIcpConnection); | |
322 | fd_note(theOutIcpConnection, "Outgoing ICP socket"); | |
323 | fd_note(theInIcpConnection, "Incoming ICP socket"); | |
324 | } else { | |
325 | theOutIcpConnection = theInIcpConnection; | |
326 | } | |
090089c4 | 327 | } |
328 | } | |
5f3f8d0e | 329 | } |
330 | ||
331 | void serverConnectionsClose() | |
332 | { | |
30a4f2a8 | 333 | /* NOTE, this function will be called repeatedly while shutdown |
334 | * is pending */ | |
335 | if (theHttpConnection >= 0) { | |
336 | debug(21, 1, "FD %d Closing HTTP connection\n", | |
337 | theHttpConnection); | |
338 | comm_close(theHttpConnection); | |
339 | comm_set_select_handler(theHttpConnection, | |
5f3f8d0e | 340 | COMM_SELECT_READ, |
341 | NULL, | |
342 | 0); | |
30a4f2a8 | 343 | theHttpConnection = -1; |
090089c4 | 344 | } |
30a4f2a8 | 345 | if (theInIcpConnection >= 0) { |
346 | /* NOTE, don't close outgoing ICP connection, we need to write to | |
347 | * it during shutdown */ | |
348 | debug(21, 1, "FD %d Closing ICP connection\n", | |
349 | theInIcpConnection); | |
350 | if (theInIcpConnection != theOutIcpConnection) | |
351 | comm_close(theInIcpConnection); | |
352 | comm_set_select_handler(theInIcpConnection, | |
5f3f8d0e | 353 | COMM_SELECT_READ, |
354 | NULL, | |
355 | 0); | |
30a4f2a8 | 356 | if (theInIcpConnection != theOutIcpConnection) |
357 | comm_set_select_handler(theOutIcpConnection, | |
358 | COMM_SELECT_READ, | |
359 | NULL, | |
360 | 0); | |
361 | theInIcpConnection = -1; | |
5f3f8d0e | 362 | } |
363 | } | |
364 | ||
0ffd22bc | 365 | static void mainReinitialize() |
5f3f8d0e | 366 | { |
ad6272a1 | 367 | debug(1, 0, "Restarting Squid Cache (version %s)...\n", version_string); |
0ffd22bc | 368 | /* Already called serverConnectionsClose and ipcacheShutdownServers() */ |
5f3f8d0e | 369 | neighborsDestroy(); |
0ffd22bc | 370 | |
00fac1f8 | 371 | parseConfigFile(ConfigFile); |
30a4f2a8 | 372 | _db_init(getCacheLogFile(), getDebugOptions()); |
0ffd22bc | 373 | neighbors_init(); |
374 | ipcacheOpenServers(); | |
d2af9477 | 375 | redirectOpenServers(); |
0ffd22bc | 376 | serverConnectionsOpen(); |
234967c9 | 377 | (void) ftpInitialize(); |
30a4f2a8 | 378 | if (theOutIcpConnection >= 0 && (!httpd_accel_mode || getAccelWithProxy())) |
379 | neighbors_open(theOutIcpConnection); | |
0ffd22bc | 380 | debug(1, 0, "Ready to serve requests.\n"); |
5f3f8d0e | 381 | } |
382 | ||
383 | static void mainInitialize() | |
384 | { | |
385 | static int first_time = 1; | |
44f99671 | 386 | if (catch_signals) { |
30a4f2a8 | 387 | squid_signal(SIGSEGV, death, SA_NODEFER | SA_RESETHAND); |
388 | squid_signal(SIGBUS, death, SA_NODEFER | SA_RESETHAND); | |
44f99671 | 389 | } |
30a4f2a8 | 390 | squid_signal(SIGPIPE, SIG_IGN, SA_RESTART); |
391 | squid_signal(SIGCHLD, sig_child, SA_NODEFER | SA_RESTART); | |
898f5d1d | 392 | #if USE_ASYNC_IO |
393 | squid_signal(SIGIO, aioSigHandler, SA_RESTART); | |
394 | #endif | |
44f99671 | 395 | |
00fac1f8 | 396 | if (ConfigFile == NULL) |
397 | ConfigFile = xstrdup(DefaultConfigFile); | |
398 | parseConfigFile(ConfigFile); | |
5f3f8d0e | 399 | |
30a4f2a8 | 400 | leave_suid(); /* Run as non privilegied user */ |
5f3f8d0e | 401 | |
30a4f2a8 | 402 | if (httpPortNumOverride != 1) |
403 | setHttpPortNum((u_short) httpPortNumOverride); | |
404 | if (icpPortNumOverride != 1) | |
405 | setIcpPortNum((u_short) icpPortNumOverride); | |
406 | ||
407 | _db_init(getCacheLogFile(), getDebugOptions()); | |
408 | fdstat_open(fileno(debug_log), FD_LOG); | |
5f3f8d0e | 409 | fd_note(fileno(debug_log), getCacheLogFile()); |
410 | ||
30a4f2a8 | 411 | debug(1, 0, "Starting Squid Cache version %s for %s...\n", |
412 | version_string, | |
413 | CONFIG_HOST_TYPE); | |
414 | debug(1, 1, "With %d file descriptors available\n", FD_SETSIZE); | |
5f3f8d0e | 415 | |
850c4ead | 416 | if (first_time) { |
234967c9 | 417 | disk_init(); /* disk_init must go before ipcache_init() */ |
30a4f2a8 | 418 | writePidFile(); /* write PID file */ |
850c4ead | 419 | } |
5f3f8d0e | 420 | ipcache_init(); |
d2af9477 | 421 | redirectOpenServers(); |
5f3f8d0e | 422 | neighbors_init(); |
234967c9 | 423 | (void) ftpInitialize(); |
5f3f8d0e | 424 | |
30a4f2a8 | 425 | #if MALLOC_DBG |
5f3f8d0e | 426 | malloc_debug(0, malloc_debug_level); |
427 | #endif | |
428 | ||
a26bdc75 | 429 | if (first_time) { |
430 | first_time = 0; | |
5f3f8d0e | 431 | /* module initialization */ |
7111c86a | 432 | urlInitialize(); |
5f3f8d0e | 433 | stat_init(&CacheInfo, getAccessLogFile()); |
434 | storeInit(); | |
435 | stmemInit(); | |
090089c4 | 436 | |
234967c9 | 437 | if (getEffectiveUser()) { |
438 | /* we were probably started as root, so cd to a swap | |
439 | * directory in case we dump core */ | |
440 | if (chdir(swappath(0)) < 0) { | |
441 | debug(1, 0, "%s: %s\n", swappath(0), xstrerror()); | |
442 | fatal_dump("Cannot cd to swap directory?"); | |
443 | } | |
444 | } | |
5f3f8d0e | 445 | /* after this point we want to see the mallinfo() output */ |
446 | do_mallinfo = 1; | |
447 | } | |
2285407f | 448 | serverConnectionsOpen(); |
30a4f2a8 | 449 | if (theOutIcpConnection >= 0 && (!httpd_accel_mode || getAccelWithProxy())) |
450 | neighbors_open(theOutIcpConnection); | |
451 | ||
452 | squid_signal(SIGUSR1, rotate_logs, SA_RESTART); | |
453 | squid_signal(SIGUSR2, sigusr2_handle, SA_RESTART); | |
454 | squid_signal(SIGHUP, reconfigure, SA_RESTART); | |
455 | squid_signal(SIGTERM, shut_down, SA_NODEFER | SA_RESETHAND | SA_RESTART); | |
456 | squid_signal(SIGINT, shut_down, SA_NODEFER | SA_RESETHAND | SA_RESTART); | |
5f3f8d0e | 457 | debug(1, 0, "Ready to serve requests.\n"); |
4d64d74a | 458 | } |
459 | ||
460 | ||
461 | int main(argc, argv) | |
462 | int argc; | |
463 | char **argv; | |
464 | { | |
465 | int errcount = 0; | |
4d64d74a | 466 | int n; /* # of GC'd objects */ |
467 | time_t last_maintain = 0; | |
7d49daab | 468 | time_t last_announce = 0; |
bc528c78 | 469 | time_t loop_delay; |
4d64d74a | 470 | |
30a4f2a8 | 471 | memset(&local_addr, '\0', sizeof(struct in_addr)); |
472 | local_addr.s_addr = inet_addr(localhost); | |
473 | ||
4d64d74a | 474 | errorInitialize(); |
475 | ||
b8de7ebe | 476 | squid_starttime = getCurrentTime(); |
4d64d74a | 477 | failure_notify = fatal_dump; |
478 | ||
479 | mainParseOptions(argc, argv); | |
480 | ||
481 | setMaxFD(); | |
482 | ||
30a4f2a8 | 483 | if (catch_signals) |
484 | for (n = FD_SETSIZE; n > 2; n--) | |
485 | close(n); | |
4d64d74a | 486 | |
487 | #if HAVE_MALLOPT | |
30a4f2a8 | 488 | #ifdef M_GRAIN |
489 | /* Round up all sizes to a multiple of this */ | |
4d64d74a | 490 | mallopt(M_GRAIN, 16); |
30a4f2a8 | 491 | #endif |
492 | #ifdef M_MXFAST | |
4d64d74a | 493 | /* biggest size that is considered a small block */ |
30a4f2a8 | 494 | mallopt(M_MXFAST, 256); |
4d64d74a | 495 | #endif |
30a4f2a8 | 496 | #ifdef M_NBLKS |
497 | /* allocate this many small blocks at once */ | |
498 | mallopt(M_NLBLKS, 32); | |
499 | #endif | |
500 | #endif /* HAVE_MALLOPT */ | |
4d64d74a | 501 | |
502 | /*init comm module */ | |
503 | comm_init(); | |
504 | ||
505 | /* we have to init fdstat here. */ | |
506 | fdstat_init(PREOPEN_FD); | |
30a4f2a8 | 507 | fdstat_open(0, FD_LOG); |
508 | fdstat_open(1, FD_LOG); | |
509 | fdstat_open(2, FD_LOG); | |
4d64d74a | 510 | fd_note(0, "STDIN"); |
511 | fd_note(1, "STDOUT"); | |
512 | fd_note(2, "STDERR"); | |
513 | ||
4d64d74a | 514 | /* enable syslog by default */ |
515 | syslog_enable = 0; | |
516 | ||
517 | /* preinit for debug module */ | |
518 | debug_log = stderr; | |
519 | hash_init(0); | |
520 | ||
4d64d74a | 521 | mainInitialize(); |
522 | ||
090089c4 | 523 | /* main loop */ |
524 | if (getCleanRate() > 0) | |
931b5039 | 525 | next_cleaning = time(NULL) + getCleanRate(); |
983061ed | 526 | for (;;) { |
30a4f2a8 | 527 | loop_delay = (time_t) 10; |
090089c4 | 528 | /* maintain cache storage */ |
b8de7ebe | 529 | if (squid_curtime > last_maintain) { |
090089c4 | 530 | storeMaintainSwapSpace(); |
b8de7ebe | 531 | last_maintain = squid_curtime; |
090089c4 | 532 | } |
30a4f2a8 | 533 | if (rotate_pending) { |
534 | ftpServerClose(); | |
535 | _db_rotate_log(); /* cache.log */ | |
536 | storeWriteCleanLog(); | |
537 | storeRotateLog(); /* store.log */ | |
538 | neighbors_rotate_log(); /* hierarchy.log */ | |
539 | stat_rotate_log(); /* access.log */ | |
540 | (void) ftpInitialize(); | |
541 | rotate_pending = 0; | |
542 | } | |
bc528c78 | 543 | /* do background processing */ |
544 | if (doBackgroundProcessing()) | |
545 | loop_delay = (time_t) 0; | |
546 | switch (comm_select(loop_delay, next_cleaning)) { | |
090089c4 | 547 | case COMM_OK: |
234967c9 | 548 | errcount = 0; /* reset if successful */ |
090089c4 | 549 | break; |
550 | case COMM_ERROR: | |
551 | errcount++; | |
234967c9 | 552 | debug(1, 0, "Select loop Error. Retry %d\n", errcount); |
090089c4 | 553 | if (errcount == 10) |
4d64d74a | 554 | fatal_dump("Select Loop failed!"); |
090089c4 | 555 | break; |
556 | case COMM_TIMEOUT: | |
b8de7ebe | 557 | if (getCleanRate() > 0 && squid_curtime >= next_cleaning) { |
019dd986 | 558 | debug(1, 1, "Performing a garbage collection...\n"); |
090089c4 | 559 | n = storePurgeOld(); |
019dd986 | 560 | debug(1, 1, "Garbage collection done, %d objects removed\n", n); |
b8de7ebe | 561 | next_cleaning = squid_curtime + getCleanRate(); |
090089c4 | 562 | } |
7d49daab | 563 | if ((n = getAnnounceRate()) > 0) { |
b8de7ebe | 564 | if (squid_curtime > last_announce + n) |
7ba794f4 | 565 | send_announce(); |
b8de7ebe | 566 | last_announce = squid_curtime; |
7d49daab | 567 | } |
090089c4 | 568 | /* house keeping */ |
090089c4 | 569 | break; |
4d64d74a | 570 | case COMM_SHUTDOWN: |
43030d00 | 571 | /* delayed close so we can transmit while shutdown pending */ |
30a4f2a8 | 572 | if (theOutIcpConnection > 0) { |
573 | comm_close(theOutIcpConnection); | |
574 | theOutIcpConnection = -1; | |
43030d00 | 575 | } |
5f3f8d0e | 576 | if (shutdown_pending) { |
577 | normal_shutdown(); | |
578 | exit(0); | |
579 | } else if (reread_pending) { | |
0ffd22bc | 580 | mainReinitialize(); |
5f3f8d0e | 581 | reread_pending = 0; /* reset */ |
582 | } else { | |
583 | fatal_dump("MAIN: SHUTDOWN from comm_select, but nothing pending."); | |
584 | } | |
0ffd22bc | 585 | break; |
090089c4 | 586 | default: |
6eb42cae | 587 | fatal_dump("MAIN: Internal error -- this should never happen."); |
090089c4 | 588 | break; |
589 | } | |
590 | } | |
591 | /* NOTREACHED */ | |
592 | exit(0); | |
983061ed | 593 | return 0; |
090089c4 | 594 | } |