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30a4f2a8 | 1 | /* |
6355abef | 2 | * $Id: main.cc,v 1.105 1996/10/25 16:43:25 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; |
30a4f2a8 | 109 | int theHttpConnection = -1; |
110 | int theInIcpConnection = -1; | |
111 | int theOutIcpConnection = -1; | |
090089c4 | 112 | int do_reuse = 1; |
d68adf86 | 113 | int opt_unlink_on_reload = 0; |
30a4f2a8 | 114 | int opt_reload_hit_only = 0; /* only UDP_HIT during store relaod */ |
1758c627 | 115 | int opt_catch_signals = 1; |
30a4f2a8 | 116 | int opt_dns_tests = 1; |
117 | int opt_foreground_rebuild = 0; | |
b6f794d6 | 118 | int opt_zap_disk_store = 0; |
6e40f263 | 119 | int opt_syslog_enable = 0; /* disabled by default */ |
1758c627 | 120 | int opt_no_ipcache = 0; /* use ipcache by default */ |
fedac7e5 | 121 | static int opt_send_signal = -1; /* no signal to send */ |
caebbe00 | 122 | int opt_udp_hit_obj = 1; |
123 | int opt_mem_pools = 1; | |
124 | int opt_forwarded_for = 1; | |
090089c4 | 125 | int vhost_mode = 0; |
235c7b49 | 126 | volatile int unbuffered_logs = 1; /* debug and hierarchy unbuffered by default */ |
127 | volatile int shutdown_pending = 0; /* set by SIGTERM handler (shut_down()) */ | |
128 | volatile int reread_pending = 0; /* set by SIGHUP handler */ | |
30a4f2a8 | 129 | char version_string[] = SQUID_VERSION; |
130 | char appname[] = "squid"; | |
131 | char localhost[] = "127.0.0.1"; | |
132 | struct in_addr local_addr; | |
56082504 | 133 | char dash_str[] = "-"; |
134 | char null_string[] = ""; | |
30a4f2a8 | 135 | |
136 | /* for error reporting from xmalloc and friends */ | |
67508012 | 137 | extern void (*failure_notify) _PARAMS((char *)); |
30a4f2a8 | 138 | |
67508012 | 139 | static volatile int rotate_pending = 0; /* set by SIGUSR1 handler */ |
30a4f2a8 | 140 | static int httpPortNumOverride = 1; |
141 | static int icpPortNumOverride = 1; /* Want to detect "-u 0" */ | |
142 | #if MALLOC_DBG | |
4d64d74a | 143 | static int malloc_debug_level = 0; |
30a4f2a8 | 144 | #endif |
4d7add01 | 145 | |
146 | static time_t next_cleaning; | |
147 | static time_t next_maintain; | |
148 | static time_t next_dirclean; | |
149 | static time_t next_announce; | |
150 | static time_t next_ip_purge; | |
151 | ||
24382924 | 152 | static time_t mainMaintenance _PARAMS((void)); |
67508012 | 153 | static void rotate_logs _PARAMS((int)); |
154 | static void reconfigure _PARAMS((int)); | |
155 | static void mainInitialize _PARAMS((void)); | |
156 | static void mainReinitialize _PARAMS((void)); | |
67508012 | 157 | static void usage _PARAMS((void)); |
158 | static void mainParseOptions _PARAMS((int, char **)); | |
159 | static void sendSignal _PARAMS((void)); | |
24382924 | 160 | static void serverConnectionsOpen _PARAMS((void)); |
b8d8561b | 161 | |
66cedb85 | 162 | extern int store_maintain_rate; |
163 | ||
b8d8561b | 164 | static void |
0673c0ba | 165 | usage(void) |
ccff9601 | 166 | { |
77ffc99f | 167 | fprintf(stderr, "\ |
7690e8eb | 168 | Usage: %s [-hsvzCDFRUVY] [-f config-file] [-[au] port] [-k signal]\n\ |
30a4f2a8 | 169 | -a port Specify ASCII port number (default: %d).\n\ |
170 | -f file Use given config-file instead of\n\ | |
171 | %s\n\ | |
ccff9601 | 172 | -h Print help message.\n\ |
7690e8eb | 173 | -i Disable IP caching.\n\ |
f3753518 | 174 | -k reconfigure|rotate|shutdown|interrupt|kill|debug|check\n\ |
7690e8eb | 175 | Send signal to running copy and exit.\n\ |
ccff9601 | 176 | -s Enable logging to syslog.\n\ |
6e40f263 | 177 | -u port Specify ICP port number (default: %d), disable with 0.\n\ |
ccff9601 | 178 | -v Print version.\n\ |
179 | -z Zap disk storage -- deletes all objects in disk cache.\n\ | |
180 | -C Do not catch fatal signals.\n\ | |
181 | -D Disable initial DNS tests.\n\ | |
30a4f2a8 | 182 | -F Foreground fast store rebuild.\n\ |
ccff9601 | 183 | -R Do not set REUSEADDR on port.\n\ |
d68adf86 | 184 | -U Unlink expired objects on reload.\n\ |
30a4f2a8 | 185 | -V Virtual host httpd-accelerator.\n\ |
1061b406 | 186 | -Y Only return UDP_HIT or UDP_RELOADING during fast reload.\n", |
30a4f2a8 | 187 | appname, CACHE_HTTP_PORT, DefaultConfigFile, CACHE_ICP_PORT); |
77ffc99f | 188 | exit(1); |
ccff9601 | 189 | } |
190 | ||
b8d8561b | 191 | static void |
192 | mainParseOptions(int argc, char *argv[]) | |
090089c4 | 193 | { |
090089c4 | 194 | extern char *optarg; |
4d64d74a | 195 | int c; |
090089c4 | 196 | |
7690e8eb | 197 | while ((c = getopt(argc, argv, "CDFRUVYa:bf:hik:m:su:vz?")) != -1) { |
090089c4 | 198 | switch (c) { |
090089c4 | 199 | case 'C': |
1758c627 | 200 | opt_catch_signals = 0; |
090089c4 | 201 | break; |
202 | case 'D': | |
30a4f2a8 | 203 | opt_dns_tests = 0; |
090089c4 | 204 | break; |
30a4f2a8 | 205 | case 'F': |
206 | opt_foreground_rebuild = 1; | |
090089c4 | 207 | break; |
090089c4 | 208 | case 'R': |
209 | do_reuse = 0; | |
210 | break; | |
d68adf86 | 211 | case 'U': |
212 | opt_unlink_on_reload = 1; | |
213 | break; | |
30a4f2a8 | 214 | case 'V': |
215 | vhost_mode = 1; | |
216 | break; | |
217 | case 'Y': | |
218 | opt_reload_hit_only = 1; | |
219 | break; | |
220 | case 'a': | |
221 | httpPortNumOverride = atoi(optarg); | |
222 | break; | |
223 | case 'b': | |
224 | unbuffered_logs = 0; | |
225 | break; | |
090089c4 | 226 | case 'f': |
00fac1f8 | 227 | xfree(ConfigFile); |
228 | ConfigFile = xstrdup(optarg); | |
090089c4 | 229 | break; |
30a4f2a8 | 230 | case 'h': |
231 | usage(); | |
090089c4 | 232 | break; |
1758c627 | 233 | case 'i': |
234 | opt_no_ipcache = 1; | |
235 | break; | |
7690e8eb | 236 | case 'k': |
24382924 | 237 | if ((int) strlen(optarg) < 1) |
7690e8eb | 238 | usage(); |
239 | if (!strncmp(optarg, "reconfigure", strlen(optarg))) | |
240 | opt_send_signal = SIGHUP; | |
241 | else if (!strncmp(optarg, "rotate", strlen(optarg))) | |
242 | opt_send_signal = SIGUSR1; | |
243 | else if (!strncmp(optarg, "debug", strlen(optarg))) | |
244 | opt_send_signal = SIGUSR2; | |
245 | else if (!strncmp(optarg, "shutdown", strlen(optarg))) | |
246 | opt_send_signal = SIGTERM; | |
6759a5fb | 247 | else if (!strncmp(optarg, "interrupt", strlen(optarg))) |
248 | opt_send_signal = SIGINT; | |
7690e8eb | 249 | else if (!strncmp(optarg, "kill", strlen(optarg))) |
250 | opt_send_signal = SIGKILL; | |
251 | else if (!strncmp(optarg, "check", strlen(optarg))) | |
fedac7e5 | 252 | opt_send_signal = 0; /* SIGNULL */ |
7690e8eb | 253 | else |
254 | usage(); | |
255 | break; | |
090089c4 | 256 | case 'm': |
30a4f2a8 | 257 | #if MALLOC_DBG |
090089c4 | 258 | malloc_debug_level = atoi(optarg); |
34c54bb6 | 259 | /* NOTREACHED */ |
090089c4 | 260 | break; |
30a4f2a8 | 261 | #else |
262 | fatal("Need to add -DMALLOC_DBG when compiling to use -m option"); | |
24382924 | 263 | /* NOTREACHED */ |
30a4f2a8 | 264 | #endif |
265 | case 's': | |
6e40f263 | 266 | opt_syslog_enable = 1; |
30a4f2a8 | 267 | break; |
268 | case 'u': | |
269 | icpPortNumOverride = atoi(optarg); | |
270 | if (icpPortNumOverride < 0) | |
271 | icpPortNumOverride = 0; | |
272 | break; | |
273 | case 'v': | |
274 | printf("Squid Cache: Version %s\n", version_string); | |
275 | exit(0); | |
276 | /* NOTREACHED */ | |
090089c4 | 277 | case 'z': |
b6f794d6 | 278 | opt_zap_disk_store = 1; |
090089c4 | 279 | break; |
280 | case '?': | |
090089c4 | 281 | default: |
ccff9601 | 282 | usage(); |
090089c4 | 283 | break; |
284 | } | |
090089c4 | 285 | } |
4d64d74a | 286 | } |
090089c4 | 287 | |
b8d8561b | 288 | static void |
289 | rotate_logs(int sig) | |
30a4f2a8 | 290 | { |
291 | debug(21, 1, "rotate_logs: SIGUSR1 received.\n"); | |
292 | rotate_pending = 1; | |
293 | #if !HAVE_SIGACTION | |
294 | signal(sig, rotate_logs); | |
295 | #endif | |
296 | } | |
297 | ||
b8d8561b | 298 | static void |
299 | reconfigure(int sig) | |
30a4f2a8 | 300 | { |
301 | debug(21, 1, "reconfigure: SIGHUP received\n"); | |
302 | debug(21, 1, "Waiting %d seconds for active connections to finish\n", | |
b6f794d6 | 303 | Config.lifetimeShutdown); |
30a4f2a8 | 304 | reread_pending = 1; |
305 | #if !HAVE_SIGACTION | |
306 | signal(sig, reconfigure); | |
307 | #endif | |
308 | } | |
309 | ||
b8d8561b | 310 | void |
311 | shut_down(int sig) | |
30a4f2a8 | 312 | { |
f3753518 | 313 | shutdown_pending = sig == SIGINT ? -1 : 1; |
30a4f2a8 | 314 | debug(21, 1, "Preparing for shutdown after %d connections\n", |
315 | ntcpconn + nudpconn); | |
316 | debug(21, 1, "Waiting %d seconds for active connections to finish\n", | |
f3753518 | 317 | shutdown_pending > 0 ? Config.lifetimeShutdown : 0); |
6e40f263 | 318 | #if SA_RESETHAND == 0 |
319 | signal(SIGTERM, SIG_DFL); | |
320 | signal(SIGINT, SIG_DFL); | |
321 | #endif | |
30a4f2a8 | 322 | } |
323 | ||
24382924 | 324 | static void |
0673c0ba | 325 | serverConnectionsOpen(void) |
4d64d74a | 326 | { |
30a4f2a8 | 327 | struct in_addr addr; |
328 | u_short port; | |
30a4f2a8 | 329 | enter_suid(); |
16b204c4 | 330 | theHttpConnection = comm_open(SOCK_STREAM, |
331 | 0, | |
b6f794d6 | 332 | Config.Addrs.tcp_incoming, |
333 | Config.Port.http, | |
16b204c4 | 334 | COMM_NONBLOCKING, |
30a4f2a8 | 335 | "HTTP Port"); |
336 | leave_suid(); | |
337 | if (theHttpConnection < 0) { | |
338 | fatal("Cannot open HTTP Port"); | |
090089c4 | 339 | } |
30a4f2a8 | 340 | fd_note(theHttpConnection, "HTTP socket"); |
341 | comm_listen(theHttpConnection); | |
b177367b | 342 | commSetSelect(theHttpConnection, |
090089c4 | 343 | COMM_SELECT_READ, |
344 | asciiHandleConn, | |
b177367b | 345 | NULL, 0); |
30a4f2a8 | 346 | debug(1, 1, "Accepting HTTP connections on FD %d.\n", |
347 | theHttpConnection); | |
090089c4 | 348 | |
b6f794d6 | 349 | if (!httpd_accel_mode || Config.Accel.withProxy) { |
7690e8eb | 350 | if ((port = Config.Port.icp) > (u_short) 0) { |
328d1c43 | 351 | enter_suid(); |
16b204c4 | 352 | theInIcpConnection = comm_open(SOCK_DGRAM, |
353 | 0, | |
b6f794d6 | 354 | Config.Addrs.udp_incoming, |
30a4f2a8 | 355 | port, |
16b204c4 | 356 | COMM_NONBLOCKING, |
30a4f2a8 | 357 | "ICP Port"); |
328d1c43 | 358 | leave_suid(); |
30a4f2a8 | 359 | if (theInIcpConnection < 0) |
360 | fatal("Cannot open ICP Port"); | |
361 | fd_note(theInIcpConnection, "ICP socket"); | |
b177367b | 362 | commSetSelect(theInIcpConnection, |
090089c4 | 363 | COMM_SELECT_READ, |
364 | icpHandleUdp, | |
b177367b | 365 | NULL, 0); |
e90100aa | 366 | comm_join_mcast_groups(theInIcpConnection); |
30a4f2a8 | 367 | debug(1, 1, "Accepting ICP connections on FD %d.\n", |
368 | theInIcpConnection); | |
369 | ||
b6f794d6 | 370 | if ((addr = Config.Addrs.udp_outgoing).s_addr != INADDR_NONE) { |
328d1c43 | 371 | enter_suid(); |
16b204c4 | 372 | theOutIcpConnection = comm_open(SOCK_DGRAM, |
cc6a9d2e | 373 | 0, |
30a4f2a8 | 374 | addr, |
375 | port, | |
cc6a9d2e | 376 | COMM_NONBLOCKING, |
30a4f2a8 | 377 | "ICP Port"); |
9d90e665 | 378 | leave_suid(); |
30a4f2a8 | 379 | if (theOutIcpConnection < 0) |
380 | fatal("Cannot open Outgoing ICP Port"); | |
b177367b | 381 | commSetSelect(theOutIcpConnection, |
30a4f2a8 | 382 | COMM_SELECT_READ, |
383 | icpHandleUdp, | |
b177367b | 384 | NULL, 0); |
30a4f2a8 | 385 | debug(1, 1, "Accepting ICP connections on FD %d.\n", |
386 | theOutIcpConnection); | |
387 | fd_note(theOutIcpConnection, "Outgoing ICP socket"); | |
388 | fd_note(theInIcpConnection, "Incoming ICP socket"); | |
389 | } else { | |
390 | theOutIcpConnection = theInIcpConnection; | |
391 | } | |
090089c4 | 392 | } |
393 | } | |
5ecceaa4 | 394 | clientdbInit(); |
16b204c4 | 395 | icmpOpen(); |
67508012 | 396 | netdbInit(); |
5f3f8d0e | 397 | } |
398 | ||
b8d8561b | 399 | void |
0673c0ba | 400 | serverConnectionsClose(void) |
5f3f8d0e | 401 | { |
30a4f2a8 | 402 | /* NOTE, this function will be called repeatedly while shutdown |
403 | * is pending */ | |
404 | if (theHttpConnection >= 0) { | |
405 | debug(21, 1, "FD %d Closing HTTP connection\n", | |
406 | theHttpConnection); | |
407 | comm_close(theHttpConnection); | |
b177367b | 408 | commSetSelect(theHttpConnection, |
5f3f8d0e | 409 | COMM_SELECT_READ, |
410 | NULL, | |
b177367b | 411 | NULL, 0); |
30a4f2a8 | 412 | theHttpConnection = -1; |
090089c4 | 413 | } |
30a4f2a8 | 414 | if (theInIcpConnection >= 0) { |
415 | /* NOTE, don't close outgoing ICP connection, we need to write to | |
416 | * it during shutdown */ | |
417 | debug(21, 1, "FD %d Closing ICP connection\n", | |
418 | theInIcpConnection); | |
419 | if (theInIcpConnection != theOutIcpConnection) | |
420 | comm_close(theInIcpConnection); | |
b177367b | 421 | commSetSelect(theInIcpConnection, |
5f3f8d0e | 422 | COMM_SELECT_READ, |
423 | NULL, | |
b177367b | 424 | NULL, 0); |
30a4f2a8 | 425 | if (theInIcpConnection != theOutIcpConnection) |
b177367b | 426 | commSetSelect(theOutIcpConnection, |
30a4f2a8 | 427 | COMM_SELECT_READ, |
428 | NULL, | |
b177367b | 429 | NULL, 0); |
30a4f2a8 | 430 | theInIcpConnection = -1; |
5f3f8d0e | 431 | } |
c7433536 | 432 | if (icmp_sock > -1) |
f6610c4e | 433 | icmpClose(); |
5f3f8d0e | 434 | } |
435 | ||
b8d8561b | 436 | static void |
0673c0ba | 437 | mainReinitialize(void) |
5f3f8d0e | 438 | { |
ad6272a1 | 439 | debug(1, 0, "Restarting Squid Cache (version %s)...\n", version_string); |
0ffd22bc | 440 | /* Already called serverConnectionsClose and ipcacheShutdownServers() */ |
5f3f8d0e | 441 | neighborsDestroy(); |
00fac1f8 | 442 | parseConfigFile(ConfigFile); |
b6f794d6 | 443 | _db_init(Config.Log.log, Config.debugOptions); |
0ffd22bc | 444 | neighbors_init(); |
f88bb09c | 445 | dnsOpenServers(); |
d2af9477 | 446 | redirectOpenServers(); |
0ffd22bc | 447 | serverConnectionsOpen(); |
234967c9 | 448 | (void) ftpInitialize(); |
b6f794d6 | 449 | if (theOutIcpConnection >= 0 && (!httpd_accel_mode || Config.Accel.withProxy)) |
30a4f2a8 | 450 | neighbors_open(theOutIcpConnection); |
0ffd22bc | 451 | debug(1, 0, "Ready to serve requests.\n"); |
5f3f8d0e | 452 | } |
453 | ||
b8d8561b | 454 | static void |
0673c0ba | 455 | mainInitialize(void) |
5f3f8d0e | 456 | { |
457 | static int first_time = 1; | |
1758c627 | 458 | if (opt_catch_signals) { |
30a4f2a8 | 459 | squid_signal(SIGSEGV, death, SA_NODEFER | SA_RESETHAND); |
460 | squid_signal(SIGBUS, death, SA_NODEFER | SA_RESETHAND); | |
44f99671 | 461 | } |
30a4f2a8 | 462 | squid_signal(SIGPIPE, SIG_IGN, SA_RESTART); |
463 | squid_signal(SIGCHLD, sig_child, SA_NODEFER | SA_RESTART); | |
44f99671 | 464 | |
00fac1f8 | 465 | if (ConfigFile == NULL) |
466 | ConfigFile = xstrdup(DefaultConfigFile); | |
467 | parseConfigFile(ConfigFile); | |
5f3f8d0e | 468 | |
30a4f2a8 | 469 | leave_suid(); /* Run as non privilegied user */ |
5f3f8d0e | 470 | |
34c54bb6 | 471 | #if USE_ASYNC_IO |
472 | #if HAVE_AIO_INIT | |
473 | if (first_time) | |
474 | aio_init(); | |
475 | #endif | |
476 | squid_signal(SIGIO, aioSigHandler, SA_RESTART); | |
477 | #endif | |
478 | ||
30a4f2a8 | 479 | if (httpPortNumOverride != 1) |
480 | setHttpPortNum((u_short) httpPortNumOverride); | |
481 | if (icpPortNumOverride != 1) | |
482 | setIcpPortNum((u_short) icpPortNumOverride); | |
483 | ||
b6f794d6 | 484 | _db_init(Config.Log.log, Config.debugOptions); |
30a4f2a8 | 485 | fdstat_open(fileno(debug_log), FD_LOG); |
b6f794d6 | 486 | fd_note(fileno(debug_log), Config.Log.log); |
5f3f8d0e | 487 | |
30a4f2a8 | 488 | debug(1, 0, "Starting Squid Cache version %s for %s...\n", |
489 | version_string, | |
490 | CONFIG_HOST_TYPE); | |
491 | debug(1, 1, "With %d file descriptors available\n", FD_SETSIZE); | |
5f3f8d0e | 492 | |
850c4ead | 493 | if (first_time) { |
94e891ea | 494 | stmemInit(); /* stmem must go before at least redirect */ |
234967c9 | 495 | disk_init(); /* disk_init must go before ipcache_init() */ |
850c4ead | 496 | } |
5f3f8d0e | 497 | ipcache_init(); |
f88bb09c | 498 | fqdncache_init(); |
499 | dnsOpenServers(); | |
d2af9477 | 500 | redirectOpenServers(); |
5f3f8d0e | 501 | neighbors_init(); |
234967c9 | 502 | (void) ftpInitialize(); |
5f3f8d0e | 503 | |
30a4f2a8 | 504 | #if MALLOC_DBG |
5f3f8d0e | 505 | malloc_debug(0, malloc_debug_level); |
506 | #endif | |
507 | ||
a26bdc75 | 508 | if (first_time) { |
5f3f8d0e | 509 | /* module initialization */ |
7111c86a | 510 | urlInitialize(); |
a528eb87 | 511 | stat_init(&HTTPCacheInfo, Config.Log.access); |
512 | stat_init(&ICPCacheInfo, NULL); | |
5f3f8d0e | 513 | storeInit(); |
090089c4 | 514 | |
b6f794d6 | 515 | if (Config.effectiveUser) { |
234967c9 | 516 | /* we were probably started as root, so cd to a swap |
517 | * directory in case we dump core */ | |
518 | if (chdir(swappath(0)) < 0) { | |
519 | debug(1, 0, "%s: %s\n", swappath(0), xstrerror()); | |
520 | fatal_dump("Cannot cd to swap directory?"); | |
521 | } | |
522 | } | |
5f3f8d0e | 523 | /* after this point we want to see the mallinfo() output */ |
524 | do_mallinfo = 1; | |
525 | } | |
2285407f | 526 | serverConnectionsOpen(); |
b6f794d6 | 527 | if (theOutIcpConnection >= 0 && (!httpd_accel_mode || Config.Accel.withProxy)) |
30a4f2a8 | 528 | neighbors_open(theOutIcpConnection); |
529 | ||
0a5b9b32 | 530 | if (first_time) |
531 | writePidFile(); /* write PID file */ | |
532 | ||
30a4f2a8 | 533 | squid_signal(SIGUSR1, rotate_logs, SA_RESTART); |
534 | squid_signal(SIGUSR2, sigusr2_handle, SA_RESTART); | |
535 | squid_signal(SIGHUP, reconfigure, SA_RESTART); | |
536 | squid_signal(SIGTERM, shut_down, SA_NODEFER | SA_RESETHAND | SA_RESTART); | |
537 | squid_signal(SIGINT, shut_down, SA_NODEFER | SA_RESETHAND | SA_RESTART); | |
5f3f8d0e | 538 | debug(1, 0, "Ready to serve requests.\n"); |
4d7add01 | 539 | |
540 | if (first_time) { | |
541 | next_cleaning = squid_curtime + Config.cleanRate; | |
542 | next_maintain = squid_curtime + 0; | |
543 | next_dirclean = squid_curtime + 15; | |
cb0486c3 | 544 | next_announce = squid_curtime + 3600; |
4d7add01 | 545 | next_ip_purge = squid_curtime + 10; |
546 | } | |
0a5b9b32 | 547 | first_time = 0; |
4d64d74a | 548 | } |
549 | ||
b8d8561b | 550 | static time_t |
0673c0ba | 551 | mainMaintenance(void) |
9ca89c5a | 552 | { |
4d7add01 | 553 | time_t next; |
4d7add01 | 554 | if (squid_curtime >= next_maintain) { |
28b2f45f | 555 | storeMaintainSwapSpace(); |
556 | next_maintain = squid_curtime + 1; | |
9ca89c5a | 557 | } |
86ee2017 | 558 | if (store_rebuilding == STORE_NOT_REBUILDING) { |
559 | if (squid_curtime >= next_ip_purge) { | |
560 | ipcache_purgelru(); | |
561 | next_ip_purge = squid_curtime + 10; | |
562 | } else if (squid_curtime >= next_dirclean) { | |
563 | /* clean a cache directory every 15 seconds */ | |
564 | /* 15 * 16 * 256 = 17 hrs */ | |
565 | storeDirClean(); | |
566 | next_dirclean = squid_curtime + 15; | |
567 | } else if (squid_curtime >= next_cleaning) { | |
568 | storePurgeOld(); | |
569 | next_cleaning = squid_curtime + Config.cleanRate; | |
570 | } else if (squid_curtime >= next_announce) { | |
1d73e33a | 571 | if (Config.Announce.on) |
ceb8994e | 572 | send_announce(); |
86ee2017 | 573 | next_announce = squid_curtime + Config.Announce.rate; |
574 | } | |
9ca89c5a | 575 | } |
4d7add01 | 576 | next = next_ip_purge; |
577 | if (next_dirclean < next) | |
578 | next = next_dirclean; | |
579 | if (next_cleaning < next) | |
580 | next = next_cleaning; | |
581 | if (next_announce < next) | |
582 | next = next_announce; | |
583 | return next - squid_curtime; | |
9ca89c5a | 584 | } |
585 | ||
b8d8561b | 586 | int |
587 | main(int argc, char **argv) | |
4d64d74a | 588 | { |
589 | int errcount = 0; | |
4d64d74a | 590 | int n; /* # of GC'd objects */ |
bc528c78 | 591 | time_t loop_delay; |
4d64d74a | 592 | |
7328e889 | 593 | /* call mallopt() before anything else */ |
594 | #if HAVE_MALLOPT | |
595 | #ifdef M_GRAIN | |
596 | /* Round up all sizes to a multiple of this */ | |
597 | mallopt(M_GRAIN, 16); | |
598 | #endif | |
599 | #ifdef M_MXFAST | |
600 | /* biggest size that is considered a small block */ | |
601 | mallopt(M_MXFAST, 256); | |
602 | #endif | |
603 | #ifdef M_NBLKS | |
604 | /* allocate this many small blocks at once */ | |
605 | mallopt(M_NLBLKS, 32); | |
606 | #endif | |
607 | #endif /* HAVE_MALLOPT */ | |
608 | ||
30a4f2a8 | 609 | memset(&local_addr, '\0', sizeof(struct in_addr)); |
610 | local_addr.s_addr = inet_addr(localhost); | |
611 | ||
4d64d74a | 612 | errorInitialize(); |
613 | ||
b8de7ebe | 614 | squid_starttime = getCurrentTime(); |
4d64d74a | 615 | failure_notify = fatal_dump; |
616 | ||
617 | mainParseOptions(argc, argv); | |
618 | ||
7690e8eb | 619 | /* send signal to running copy and exit */ |
620 | if (opt_send_signal != -1) { | |
621 | sendSignal(); | |
622 | /* NOTREACHED */ | |
623 | } | |
4d64d74a | 624 | setMaxFD(); |
625 | ||
1758c627 | 626 | if (opt_catch_signals) |
30a4f2a8 | 627 | for (n = FD_SETSIZE; n > 2; n--) |
628 | close(n); | |
4d64d74a | 629 | |
4d64d74a | 630 | /*init comm module */ |
631 | comm_init(); | |
632 | ||
633 | /* we have to init fdstat here. */ | |
634 | fdstat_init(PREOPEN_FD); | |
30a4f2a8 | 635 | fdstat_open(0, FD_LOG); |
636 | fdstat_open(1, FD_LOG); | |
637 | fdstat_open(2, FD_LOG); | |
4d64d74a | 638 | fd_note(0, "STDIN"); |
639 | fd_note(1, "STDOUT"); | |
640 | fd_note(2, "STDERR"); | |
641 | ||
4d64d74a | 642 | /* preinit for debug module */ |
643 | debug_log = stderr; | |
644 | hash_init(0); | |
645 | ||
4d64d74a | 646 | mainInitialize(); |
647 | ||
090089c4 | 648 | /* main loop */ |
983061ed | 649 | for (;;) { |
30a4f2a8 | 650 | if (rotate_pending) { |
651 | ftpServerClose(); | |
e97f40f4 | 652 | icmpClose(); |
30a4f2a8 | 653 | _db_rotate_log(); /* cache.log */ |
654 | storeWriteCleanLog(); | |
655 | storeRotateLog(); /* store.log */ | |
30a4f2a8 | 656 | stat_rotate_log(); /* access.log */ |
657 | (void) ftpInitialize(); | |
e97f40f4 | 658 | icmpOpen(); |
30a4f2a8 | 659 | rotate_pending = 0; |
660 | } | |
4d7add01 | 661 | if ((loop_delay = mainMaintenance()) < 0) |
662 | loop_delay = 0; | |
66cedb85 | 663 | else if (loop_delay > store_maintain_rate) |
664 | loop_delay = store_maintain_rate; | |
bc528c78 | 665 | if (doBackgroundProcessing()) |
4d7add01 | 666 | loop_delay = 0; |
9ca89c5a | 667 | switch (comm_select(loop_delay)) { |
090089c4 | 668 | case COMM_OK: |
234967c9 | 669 | errcount = 0; /* reset if successful */ |
090089c4 | 670 | break; |
671 | case COMM_ERROR: | |
672 | errcount++; | |
234967c9 | 673 | debug(1, 0, "Select loop Error. Retry %d\n", errcount); |
090089c4 | 674 | if (errcount == 10) |
4d64d74a | 675 | fatal_dump("Select Loop failed!"); |
090089c4 | 676 | break; |
4d64d74a | 677 | case COMM_SHUTDOWN: |
43030d00 | 678 | /* delayed close so we can transmit while shutdown pending */ |
30a4f2a8 | 679 | if (theOutIcpConnection > 0) { |
680 | comm_close(theOutIcpConnection); | |
681 | theOutIcpConnection = -1; | |
43030d00 | 682 | } |
5f3f8d0e | 683 | if (shutdown_pending) { |
684 | normal_shutdown(); | |
685 | exit(0); | |
686 | } else if (reread_pending) { | |
0ffd22bc | 687 | mainReinitialize(); |
5f3f8d0e | 688 | reread_pending = 0; /* reset */ |
689 | } else { | |
690 | fatal_dump("MAIN: SHUTDOWN from comm_select, but nothing pending."); | |
691 | } | |
0ffd22bc | 692 | break; |
9ca89c5a | 693 | case COMM_TIMEOUT: |
6c93e119 | 694 | break; |
090089c4 | 695 | default: |
6eb42cae | 696 | fatal_dump("MAIN: Internal error -- this should never happen."); |
090089c4 | 697 | break; |
698 | } | |
699 | } | |
700 | /* NOTREACHED */ | |
983061ed | 701 | return 0; |
090089c4 | 702 | } |
7690e8eb | 703 | |
b8d8561b | 704 | static void |
0673c0ba | 705 | sendSignal(void) |
7690e8eb | 706 | { |
ff8d0ea6 | 707 | pid_t pid; |
fedac7e5 | 708 | debug_log = stderr; |
709 | if (ConfigFile == NULL) | |
710 | ConfigFile = xstrdup(DefaultConfigFile); | |
711 | parseConfigFile(ConfigFile); | |
712 | pid = readPidFile(); | |
713 | if (pid > 1) { | |
714 | if (kill(pid, opt_send_signal) && | |
715 | /* ignore permissions if just running check */ | |
716 | !(opt_send_signal == 0 && errno == EPERM)) { | |
717 | fprintf(stderr, "%s: ERROR: Could not send ", appname); | |
718 | fprintf(stderr, "signal %d to process %d: %s\n", | |
41d30aa8 | 719 | opt_send_signal, (int) pid, xstrerror()); |
7690e8eb | 720 | exit(1); |
721 | } | |
fedac7e5 | 722 | } else { |
723 | fprintf(stderr, "%s: ERROR: No running copy\n", appname); | |
724 | exit(1); | |
7690e8eb | 725 | } |
fedac7e5 | 726 | /* signal successfully sent */ |
727 | exit(0); | |
728 | } |