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30a4f2a8 | 1 | /* |
262a0e14 | 2 | * $Id$ |
30a4f2a8 | 3 | * |
4 | * DEBUG: section 21 Misc Functions | |
5 | * AUTHOR: Harvest Derived | |
6 | * | |
2b6662ba | 7 | * SQUID Web Proxy Cache http://www.squid-cache.org/ |
e25c139f | 8 | * ---------------------------------------------------------- |
30a4f2a8 | 9 | * |
2b6662ba | 10 | * Squid is the result of efforts by numerous individuals from |
11 | * the Internet community; see the CONTRIBUTORS file for full | |
12 | * details. Many organizations have provided support for Squid's | |
13 | * development; see the SPONSORS file for full details. Squid is | |
14 | * Copyrighted (C) 2001 by the Regents of the University of | |
15 | * California; see the COPYRIGHT file for full details. Squid | |
16 | * incorporates software developed and/or copyrighted by other | |
17 | * sources; see the CREDITS file for full details. | |
30a4f2a8 | 18 | * |
19 | * This program is free software; you can redistribute it and/or modify | |
20 | * it under the terms of the GNU General Public License as published by | |
21 | * the Free Software Foundation; either version 2 of the License, or | |
22 | * (at your option) any later version. | |
26ac0430 | 23 | * |
30a4f2a8 | 24 | * This program is distributed in the hope that it will be useful, |
25 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
26 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
27 | * GNU General Public License for more details. | |
26ac0430 | 28 | * |
30a4f2a8 | 29 | * You should have received a copy of the GNU General Public License |
30 | * along with this program; if not, write to the Free Software | |
cbdec147 | 31 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
e25c139f | 32 | * |
019dd986 | 33 | */ |
44a47c6e | 34 | |
35 | #include "squid.h" | |
27bc2077 AJ |
36 | #include "compat/initgroups.h" |
37 | #include "compat/getaddrinfo.h" | |
38 | #include "compat/getnameinfo.h" | |
39 | #include "compat/tempnam.h" | |
528b2c61 | 40 | #include "fde.h" |
96d89ea0 | 41 | #include "ip/Intercept.h" |
0eb49b6d | 42 | #include "MemBuf.h" |
27bc2077 | 43 | #include "ProtoPort.h" |
a98bcbee | 44 | #include "SquidMath.h" |
985c86bc | 45 | #include "SquidTime.h" |
27bc2077 AJ |
46 | #include "SwapDir.h" |
47 | #include "wordlist.h" | |
44a47c6e | 48 | |
62ae0622 | 49 | #if HAVE_SYS_PRCTL_H |
50 | #include <sys/prctl.h> | |
51 | #endif | |
52 | ||
090089c4 | 53 | #define DEAD_MSG "\ |
c5c666ab | 54 | The Squid Cache (version %s) died.\n\ |
090089c4 | 55 | \n\ |
c5c666ab | 56 | You've encountered a fatal error in the Squid Cache version %s.\n\ |
090089c4 | 57 | If a core file was created (possibly in the swap directory),\n\ |
b8de7ebe | 58 | please execute 'gdb squid core' or 'dbx squid core', then type 'where',\n\ |
784219b8 | 59 | and report the trace back to squid-bugs@squid-cache.org.\n\ |
090089c4 | 60 | \n\ |
61 | Thanks!\n" | |
62 | ||
f5b8bbc4 | 63 | static void fatal_common(const char *); |
137ee196 | 64 | static void fatalvf(const char *fmt, va_list args); |
f5b8bbc4 | 65 | static void mail_warranty(void); |
63986a85 | 66 | #if MEM_GEN_TRACE |
399e85ea | 67 | extern void log_trace_done(); |
63986a85 | 68 | extern void log_trace_init(char *); |
399e85ea | 69 | #endif |
329ce686 | 70 | static void restoreCapabilities(int keep); |
24382924 | 71 | |
941a3077 | 72 | #ifdef _SQUID_LINUX_ |
73 | /* Workaround for crappy glic header files */ | |
e6ccf245 | 74 | SQUIDCEXTERN int backtrace(void *, int); |
75 | SQUIDCEXTERN void backtrace_symbols_fd(void *, int, int); | |
76 | SQUIDCEXTERN int setresuid(uid_t, uid_t, uid_t); | |
10da753f FC |
77 | #else /* _SQUID_LINUX_ */ |
78 | /* needed on Opensolaris for backtrace_symbols_fd */ | |
79 | #if HAVE_EXECINFO_H | |
80 | #include <execinfo.h> | |
81 | #endif /* HAVE_EXECINFO_H */ | |
82 | ||
941a3077 | 83 | #endif /* _SQUID_LINUX */ |
84 | ||
8fd63c35 | 85 | SQUIDCEXTERN void (*failure_notify) (const char *); |
7e3ce7b9 | 86 | |
4a5a6c62 | 87 | void |
429fdbec | 88 | releaseServerSockets(void) |
89 | { | |
812ed90c | 90 | int i; |
429fdbec | 91 | /* Release the main ports as early as possible */ |
62e76326 | 92 | |
812ed90c | 93 | for (i = 0; i < NHttpSockets; i++) { |
62e76326 | 94 | if (HttpSockets[i] >= 0) |
95 | close(HttpSockets[i]); | |
812ed90c | 96 | } |
62e76326 | 97 | |
429fdbec | 98 | if (theInIcpConnection >= 0) |
62e76326 | 99 | close(theInIcpConnection); |
100 | ||
429fdbec | 101 | if (theOutIcpConnection >= 0 && theOutIcpConnection != theInIcpConnection) |
62e76326 | 102 | close(theOutIcpConnection); |
429fdbec | 103 | } |
104 | ||
b8d8561b | 105 | static char * |
0673c0ba | 106 | dead_msg(void) |
090089c4 | 107 | { |
95d659f0 | 108 | LOCAL_ARRAY(char, msg, 1024); |
56878878 | 109 | snprintf(msg, 1024, DEAD_MSG, version_string, version_string); |
090089c4 | 110 | return msg; |
111 | } | |
112 | ||
24382924 | 113 | static void |
0673c0ba | 114 | mail_warranty(void) |
090089c4 | 115 | { |
019dd986 | 116 | FILE *fp = NULL; |
6e40f263 | 117 | static char command[256]; |
b99a6dec | 118 | #if HAVE_MKSTEMP |
62e76326 | 119 | |
b99a6dec | 120 | char filename[] = "/tmp/squid-XXXXXX"; |
121 | int tfd = mkstemp(filename); | |
62e76326 | 122 | |
b99a6dec | 123 | if (tfd < 0) |
62e76326 | 124 | return; |
125 | ||
b99a6dec | 126 | if ((fp = fdopen(tfd, "w")) == NULL) |
62e76326 | 127 | return; |
128 | ||
b99a6dec | 129 | #else |
62e76326 | 130 | |
b99a6dec | 131 | char *filename; |
62e76326 | 132 | |
7dbca7a4 | 133 | if ((filename = tempnam(NULL, APP_SHORTNAME)) == NULL) |
62e76326 | 134 | return; |
135 | ||
6e40f263 | 136 | if ((fp = fopen(filename, "w")) == NULL) |
62e76326 | 137 | return; |
138 | ||
b99a6dec | 139 | #endif |
62e76326 | 140 | |
abacf776 | 141 | if (Config.EmailFrom) |
142 | fprintf(fp, "From: %s\n", Config.EmailFrom); | |
143 | else | |
7dbca7a4 | 144 | fprintf(fp, "From: %s@%s\n", APP_SHORTNAME, uniqueHostname()); |
62e76326 | 145 | |
edae7bc0 | 146 | fprintf(fp, "To: %s\n", Config.adminEmail); |
62e76326 | 147 | |
6e40f263 | 148 | fprintf(fp, "Subject: %s\n", dead_msg()); |
62e76326 | 149 | |
6e40f263 | 150 | fclose(fp); |
62e76326 | 151 | |
d084bf20 | 152 | snprintf(command, 256, "%s %s < %s", Config.EmailProgram, Config.adminEmail, filename); |
62e76326 | 153 | |
26ac0430 | 154 | if (system(command)) {} /* XXX should avoid system(3) */ |
62e76326 | 155 | |
6e40f263 | 156 | unlink(filename); |
090089c4 | 157 | } |
158 | ||
4a5a6c62 | 159 | void |
43c3424b | 160 | dumpMallocStats(void) |
3f43b19b | 161 | { |
88738790 | 162 | #if HAVE_MSTATS && HAVE_GNUMALLOC_H |
62e76326 | 163 | |
88738790 | 164 | struct mstats ms = mstats(); |
165 | fprintf(debug_log, "\ttotal space in arena: %6d KB\n", | |
62e76326 | 166 | (int) (ms.bytes_total >> 10)); |
88738790 | 167 | fprintf(debug_log, "\tTotal free: %6d KB %d%%\n", |
62e76326 | 168 | (int) (ms.bytes_free >> 10), |
a98bcbee | 169 | Math::intPercent(ms.bytes_free, ms.bytes_total)); |
eb824054 | 170 | #elif HAVE_MALLINFO && HAVE_STRUCT_MALLINFO |
62e76326 | 171 | |
3f43b19b | 172 | struct mallinfo mp; |
30a4f2a8 | 173 | int t; |
62e76326 | 174 | |
3f43b19b | 175 | if (!do_mallinfo) |
62e76326 | 176 | return; |
177 | ||
3f43b19b | 178 | mp = mallinfo(); |
62e76326 | 179 | |
7dbca7a4 | 180 | fprintf(debug_log, "Memory usage for "APP_SHORTNAME" via mallinfo():\n"); |
62e76326 | 181 | |
e4049756 | 182 | fprintf(debug_log, "\ttotal space in arena: %6ld KB\n", |
183 | (long)mp.arena >> 10); | |
62e76326 | 184 | |
e4049756 | 185 | fprintf(debug_log, "\tOrdinary blocks: %6ld KB %6ld blks\n", |
186 | (long)mp.uordblks >> 10, (long)mp.ordblks); | |
62e76326 | 187 | |
e4049756 | 188 | fprintf(debug_log, "\tSmall blocks: %6ld KB %6ld blks\n", |
189 | (long)mp.usmblks >> 10, (long)mp.smblks); | |
62e76326 | 190 | |
e4049756 | 191 | fprintf(debug_log, "\tHolding blocks: %6ld KB %6ld blks\n", |
192 | (long)mp.hblkhd >> 10, (long)mp.hblks); | |
62e76326 | 193 | |
e4049756 | 194 | fprintf(debug_log, "\tFree Small blocks: %6ld KB\n", |
195 | (long)mp.fsmblks >> 10); | |
62e76326 | 196 | |
e4049756 | 197 | fprintf(debug_log, "\tFree Ordinary blocks: %6ld KB\n", |
198 | (long)mp.fordblks >> 10); | |
62e76326 | 199 | |
30a4f2a8 | 200 | t = mp.uordblks + mp.usmblks + mp.hblkhd; |
62e76326 | 201 | |
9e4ad609 | 202 | fprintf(debug_log, "\tTotal in use: %6d KB %d%%\n", |
a98bcbee | 203 | t >> 10, Math::intPercent(t, mp.arena)); |
62e76326 | 204 | |
30a4f2a8 | 205 | t = mp.fsmblks + mp.fordblks; |
62e76326 | 206 | |
9e4ad609 | 207 | fprintf(debug_log, "\tTotal free: %6d KB %d%%\n", |
a98bcbee | 208 | t >> 10, Math::intPercent(t, mp.arena)); |
62e76326 | 209 | |
6a9f6389 | 210 | #if HAVE_STRUCT_MALLINFO_MXFAST |
62e76326 | 211 | |
9e4ad609 | 212 | fprintf(debug_log, "\tmax size of small blocks:\t%d\n", |
62e76326 | 213 | mp.mxfast); |
214 | ||
9e4ad609 | 215 | fprintf(debug_log, "\tnumber of small blocks in a holding block:\t%d\n", |
62e76326 | 216 | mp.nlblks); |
217 | ||
9e4ad609 | 218 | fprintf(debug_log, "\tsmall block rounding factor:\t%d\n", |
62e76326 | 219 | mp.grain); |
220 | ||
9e4ad609 | 221 | fprintf(debug_log, "\tspace (including overhead) allocated in ord. blks:\t%d\n", |
62e76326 | 222 | mp.uordbytes); |
223 | ||
9e4ad609 | 224 | fprintf(debug_log, "\tnumber of ordinary blocks allocated:\t%d\n", |
62e76326 | 225 | mp.allocated); |
226 | ||
9e4ad609 | 227 | fprintf(debug_log, "\tbytes used in maintaining the free tree:\t%d\n", |
62e76326 | 228 | mp.treeoverhead); |
229 | ||
6a9f6389 | 230 | #endif /* HAVE_STRUCT_MALLINFO_MXFAST */ |
3f43b19b | 231 | #endif /* HAVE_MALLINFO */ |
232 | } | |
30a4f2a8 | 233 | |
f2908497 | 234 | void |
62e76326 | 235 | |
f2908497 | 236 | squid_getrusage(struct rusage *r) |
f0f81709 | 237 | { |
62e76326 | 238 | |
8da94b66 | 239 | memset(r, '\0', sizeof(struct rusage)); |
30a4f2a8 | 240 | #if HAVE_GETRUSAGE && defined(RUSAGE_SELF) |
cd19f0b6 | 241 | #ifdef _SQUID_SOLARIS_ |
242 | /* Solaris 2.5 has getrusage() permission bug -- Arjan de Vet */ | |
243 | enter_suid(); | |
244 | #endif | |
62e76326 | 245 | |
f2908497 | 246 | getrusage(RUSAGE_SELF, r); |
cd19f0b6 | 247 | #ifdef _SQUID_SOLARIS_ |
62e76326 | 248 | |
cd19f0b6 | 249 | leave_suid(); |
250 | #endif | |
56983a01 | 251 | #endif |
f2908497 | 252 | } |
253 | ||
254 | double | |
62e76326 | 255 | |
f2908497 | 256 | rusage_cputime(struct rusage *r) |
257 | { | |
258 | return (double) r->ru_stime.tv_sec + | |
62e76326 | 259 | (double) r->ru_utime.tv_sec + |
260 | (double) r->ru_stime.tv_usec / 1000000.0 + | |
261 | (double) r->ru_utime.tv_usec / 1000000.0; | |
f2908497 | 262 | } |
263 | ||
ec603b25 | 264 | /* Hack for some HP-UX preprocessors */ |
265 | #ifndef HAVE_GETPAGESIZE | |
266 | #define HAVE_GETPAGESIZE 0 | |
267 | #endif | |
268 | ||
f2908497 | 269 | int |
62e76326 | 270 | |
f2908497 | 271 | rusage_maxrss(struct rusage *r) |
272 | { | |
4fdc3986 | 273 | #if defined(_SQUID_SGI_) && _ABIAPI |
274 | return r->ru_pad[0]; | |
275 | #elif defined(_SQUID_SGI_) | |
62e76326 | 276 | |
f2908497 | 277 | return r->ru_maxrss; |
278 | #elif defined(_SQUID_OSF_) | |
62e76326 | 279 | |
a6e0ad1e | 280 | return r->ru_maxrss; |
281 | #elif defined(_SQUID_AIX_) | |
282 | ||
f2908497 | 283 | return r->ru_maxrss; |
284 | #elif defined(BSD4_4) | |
62e76326 | 285 | |
f2908497 | 286 | return r->ru_maxrss; |
6b8e7481 | 287 | #elif defined(HAVE_GETPAGESIZE) && HAVE_GETPAGESIZE != 0 |
62e76326 | 288 | |
f2908497 | 289 | return (r->ru_maxrss * getpagesize()) >> 10; |
c7a1083d | 290 | #elif defined(PAGESIZE) |
62e76326 | 291 | |
c7a1083d | 292 | return (r->ru_maxrss * PAGESIZE) >> 10; |
8505e57b | 293 | #else |
62e76326 | 294 | |
8505e57b | 295 | return r->ru_maxrss; |
f2908497 | 296 | #endif |
297 | } | |
298 | ||
299 | int | |
62e76326 | 300 | |
f2908497 | 301 | rusage_pagefaults(struct rusage *r) |
302 | { | |
4fdc3986 | 303 | #if defined(_SQUID_SGI_) && _ABIAPI |
304 | return r->ru_pad[5]; | |
305 | #else | |
62e76326 | 306 | |
f2908497 | 307 | return r->ru_majflt; |
4fdc3986 | 308 | #endif |
f2908497 | 309 | } |
310 | ||
311 | ||
4a5a6c62 | 312 | void |
f2908497 | 313 | PrintRusage(void) |
314 | { | |
62e76326 | 315 | |
f2908497 | 316 | struct rusage rusage; |
317 | squid_getrusage(&rusage); | |
2b906e48 | 318 | fprintf(debug_log, "CPU Usage: %.3f seconds = %.3f user + %.3f sys\n", |
62e76326 | 319 | rusage_cputime(&rusage), |
320 | rusage.ru_utime.tv_sec + ((double) rusage.ru_utime.tv_usec / 1000000.0), | |
321 | rusage.ru_stime.tv_sec + ((double) rusage.ru_stime.tv_usec / 1000000.0)); | |
f2908497 | 322 | fprintf(debug_log, "Maximum Resident Size: %d KB\n", |
62e76326 | 323 | rusage_maxrss(&rusage)); |
f2908497 | 324 | fprintf(debug_log, "Page faults with physical i/o: %d\n", |
62e76326 | 325 | rusage_pagefaults(&rusage)); |
f0f81709 | 326 | } |
327 | ||
03d7b07f | 328 | |
b8d8561b | 329 | void |
330 | death(int sig) | |
44a47c6e | 331 | { |
0e08ce4b | 332 | if (sig == SIGSEGV) |
62e76326 | 333 | fprintf(debug_log, "FATAL: Received Segment Violation...dying.\n"); |
0e08ce4b | 334 | else if (sig == SIGBUS) |
62e76326 | 335 | fprintf(debug_log, "FATAL: Received Bus Error...dying.\n"); |
0e08ce4b | 336 | else |
62e76326 | 337 | fprintf(debug_log, "FATAL: Received signal %d...dying.\n", sig); |
0b4639af | 338 | |
0a081cb0 | 339 | #if PRINT_STACK_TRACE |
0b4639af | 340 | #ifdef _SQUID_HPUX_ |
341 | { | |
62e76326 | 342 | extern void U_STACK_TRACE(void); /* link with -lcl */ |
343 | fflush(debug_log); | |
344 | dup2(fileno(debug_log), 2); | |
345 | U_STACK_TRACE(); | |
0b4639af | 346 | } |
62e76326 | 347 | |
0b4639af | 348 | #endif /* _SQUID_HPUX_ */ |
10da753f | 349 | #if defined(_SQUID_SOLARIS_) && HAVE_LIBOPCOM_STACK |
4f07153c | 350 | { /* get ftp://opcom.sun.ca/pub/tars/opcom_stack.tar.gz and */ |
62e76326 | 351 | extern void opcom_stack_trace(void); /* link with -lopcom_stack */ |
352 | fflush(debug_log); | |
353 | dup2(fileno(debug_log), fileno(stdout)); | |
354 | opcom_stack_trace(); | |
355 | fflush(stdout); | |
0b4639af | 356 | } |
62e76326 | 357 | |
10da753f | 358 | #endif /* _SQUID_SOLARIS_and HAVE_LIBOPCOM_STACK */ |
ce3d30fb | 359 | #if HAVE_BACKTRACE_SYMBOLS_FD |
360 | { | |
62e76326 | 361 | static void *(callarray[8192]); |
362 | int n; | |
363 | n = backtrace(callarray, 8192); | |
364 | backtrace_symbols_fd(callarray, n, fileno(debug_log)); | |
ce3d30fb | 365 | } |
62e76326 | 366 | |
ce3d30fb | 367 | #endif |
0b4639af | 368 | #endif /* PRINT_STACK_TRACE */ |
369 | ||
06648839 | 370 | #if SA_RESETHAND == 0 && !defined(_SQUID_MSWIN_) |
44a47c6e | 371 | signal(SIGSEGV, SIG_DFL); |
62e76326 | 372 | |
44a47c6e | 373 | signal(SIGBUS, SIG_DFL); |
62e76326 | 374 | |
0e08ce4b | 375 | signal(sig, SIG_DFL); |
62e76326 | 376 | |
30a4f2a8 | 377 | #endif |
62e76326 | 378 | |
429fdbec | 379 | releaseServerSockets(); |
62e76326 | 380 | |
e3ef2b09 | 381 | storeDirWriteCleanLogs(0); |
62e76326 | 382 | |
4b0f5de8 | 383 | if (!shutting_down) { |
384 | PrintRusage(); | |
62e76326 | 385 | |
4b0f5de8 | 386 | dumpMallocStats(); |
387 | } | |
62e76326 | 388 | |
6e40f263 | 389 | if (squid_curtime - SQUID_RELEASE_TIME < 864000) { |
62e76326 | 390 | /* skip if more than 10 days old */ |
391 | ||
392 | if (Config.adminEmail) | |
393 | mail_warranty(); | |
329ce686 | 394 | |
395 | puts(dead_msg()); | |
6e40f263 | 396 | } |
62e76326 | 397 | |
776ff02c | 398 | if (shutting_down) |
329ce686 | 399 | exit(1); |
776ff02c | 400 | |
44a47c6e | 401 | abort(); |
402 | } | |
403 | ||
404 | ||
b8d8561b | 405 | void |
23d92c64 | 406 | sigusr2_handle(int sig) |
090089c4 | 407 | { |
30a4f2a8 | 408 | static int state = 0; |
96e03dd8 | 409 | /* no debugs() here; bad things happen if the signal is delivered during _db_print() */ |
62e76326 | 410 | |
30a4f2a8 | 411 | if (state == 0) { |
32d002cb | 412 | #if !MEM_GEN_TRACE |
d7298d24 | 413 | Debug::parseOptions("ALL,7"); |
2bf05976 | 414 | #else |
62e76326 | 415 | |
416 | log_trace_done(); | |
63986a85 | 417 | #endif |
62e76326 | 418 | |
419 | state = 1; | |
30a4f2a8 | 420 | } else { |
32d002cb | 421 | #if !MEM_GEN_TRACE |
62493678 | 422 | Debug::parseOptions(Debug::debugOptions); |
2bf05976 | 423 | #else |
62e76326 | 424 | |
425 | log_trace_init("/tmp/squid.alloc"); | |
63986a85 | 426 | #endif |
62e76326 | 427 | |
428 | state = 0; | |
30a4f2a8 | 429 | } |
62e76326 | 430 | |
30a4f2a8 | 431 | #if !HAVE_SIGACTION |
e504b0a7 | 432 | if (signal(sig, sigusr2_handle) == SIG_ERR) /* reinstall */ |
29827b3e | 433 | debugs(50, 0, "signal: sig=" << sig << " func=sigusr2_handle: " << xstrerror()); |
62e76326 | 434 | |
090089c4 | 435 | #endif |
436 | } | |
437 | ||
24382924 | 438 | static void |
0ee4272b | 439 | fatal_common(const char *message) |
090089c4 | 440 | { |
db40ae20 | 441 | #if HAVE_SYSLOG |
6b8e7481 | 442 | syslog(LOG_ALERT, "%s", message); |
db40ae20 | 443 | #endif |
62e76326 | 444 | |
9bc73deb | 445 | fprintf(debug_log, "FATAL: %s\n", message); |
62e76326 | 446 | |
62493678 | 447 | if (Debug::log_stderr > 0 && debug_log != stderr) |
62e76326 | 448 | fprintf(stderr, "FATAL: %s\n", message); |
449 | ||
c5c666ab | 450 | fprintf(debug_log, "Squid Cache (Version %s): Terminated abnormally.\n", |
62e76326 | 451 | version_string); |
452 | ||
2c47cf74 | 453 | fflush(debug_log); |
62e76326 | 454 | |
9e4ad609 | 455 | PrintRusage(); |
62e76326 | 456 | |
9e4ad609 | 457 | dumpMallocStats(); |
090089c4 | 458 | } |
459 | ||
460 | /* fatal */ | |
b8d8561b | 461 | void |
0ee4272b | 462 | fatal(const char *message) |
090089c4 | 463 | { |
634243ef AJ |
464 | /* suppress secondary errors from the dying */ |
465 | shutting_down = 1; | |
466 | ||
429fdbec | 467 | releaseServerSockets(); |
b2c141d4 | 468 | /* check for store_dirs_rebuilding because fatal() is often |
d399be0e | 469 | * used in early initialization phases, long before we ever |
470 | * get to the store log. */ | |
62e76326 | 471 | |
bef81ea5 | 472 | /* XXX: this should be turned into a callback-on-fatal, or |
473 | * a mandatory-shutdown-event or something like that. | |
474 | * - RBC 20060819 | |
475 | */ | |
476 | ||
975b5060 | 477 | /* |
478 | * DPW 2007-07-06 | |
479 | * Call leave_suid() here to make sure that swap.state files | |
480 | * are written as the effective user, rather than root. Squid | |
481 | * may take on root privs during reconfigure. If squid.conf | |
482 | * contains a "Bungled" line, fatal() will be called when the | |
483 | * process still has root privs. | |
484 | */ | |
7e0f82f2 | 485 | leave_suid(); |
975b5060 | 486 | |
bef81ea5 | 487 | if (0 == StoreController::store_dirs_rebuilding) |
62e76326 | 488 | storeDirWriteCleanLogs(0); |
489 | ||
090089c4 | 490 | fatal_common(message); |
62e76326 | 491 | |
776ff02c | 492 | exit(1); |
090089c4 | 493 | } |
494 | ||
137ee196 | 495 | /* printf-style interface for fatal */ |
137ee196 | 496 | void |
497 | fatalf(const char *fmt,...) | |
498 | { | |
499 | va_list args; | |
500 | va_start(args, fmt); | |
137ee196 | 501 | fatalvf(fmt, args); |
502 | va_end(args); | |
503 | } | |
504 | ||
505 | ||
506 | /* used by fatalf */ | |
507 | static void | |
af6a12ee AJ |
508 | fatalvf(const char *fmt, va_list args) |
509 | { | |
137ee196 | 510 | static char fatal_str[BUFSIZ]; |
511 | vsnprintf(fatal_str, sizeof(fatal_str), fmt, args); | |
512 | fatal(fatal_str); | |
513 | } | |
514 | ||
090089c4 | 515 | /* fatal with dumping core */ |
b8d8561b | 516 | void |
af6a12ee AJ |
517 | fatal_dump(const char *message) |
518 | { | |
7e3ce7b9 | 519 | failure_notify = NULL; |
429fdbec | 520 | releaseServerSockets(); |
62e76326 | 521 | |
090089c4 | 522 | if (message) |
62e76326 | 523 | fatal_common(message); |
524 | ||
776ff02c | 525 | /* |
526 | * Call leave_suid() here to make sure that swap.state files | |
527 | * are written as the effective user, rather than root. Squid | |
528 | * may take on root privs during reconfigure. If squid.conf | |
529 | * contains a "Bungled" line, fatal() will be called when the | |
530 | * process still has root privs. | |
531 | */ | |
532 | leave_suid(); | |
533 | ||
4a69c163 | 534 | if (opt_catch_signals) |
62e76326 | 535 | storeDirWriteCleanLogs(0); |
536 | ||
090089c4 | 537 | abort(); |
538 | } | |
539 | ||
b8d8561b | 540 | void |
af6a12ee AJ |
541 | debug_trap(const char *message) |
542 | { | |
4a69c163 | 543 | if (!opt_catch_signals) |
62e76326 | 544 | fatal_dump(message); |
545 | ||
a3d5953d | 546 | _db_print("WARNING: %s\n", message); |
85b701ed | 547 | } |
548 | ||
b8d8561b | 549 | void |
af6a12ee AJ |
550 | sig_child(int sig) |
551 | { | |
a50bfe93 | 552 | #ifndef _SQUID_MSWIN_ |
30a4f2a8 | 553 | #ifdef _SQUID_NEXT_ |
554 | union wait status; | |
555 | #else | |
62e76326 | 556 | |
090089c4 | 557 | int status; |
090089c4 | 558 | #endif |
62e76326 | 559 | |
ff8d0ea6 | 560 | pid_t pid; |
090089c4 | 561 | |
30a4f2a8 | 562 | do { |
563 | #ifdef _SQUID_NEXT_ | |
62e76326 | 564 | pid = wait3(&status, WNOHANG, NULL); |
090089c4 | 565 | #else |
62e76326 | 566 | |
567 | pid = waitpid(-1, &status, WNOHANG); | |
090089c4 | 568 | #endif |
96e03dd8 | 569 | /* no debugs() here; bad things happen if the signal is delivered during _db_print() */ |
30a4f2a8 | 570 | #if HAVE_SIGACTION |
62e76326 | 571 | |
30a4f2a8 | 572 | } while (pid > 0); |
62e76326 | 573 | |
234967c9 | 574 | #else |
62e76326 | 575 | |
576 | } | |
577 | ||
3d0ac046 | 578 | while (pid > 0 || (pid < 0 && errno == EINTR)); |
30a4f2a8 | 579 | signal(sig, sig_child); |
62e76326 | 580 | |
a50bfe93 | 581 | #endif |
234967c9 | 582 | #endif |
30a4f2a8 | 583 | } |
44a47c6e | 584 | |
0ee4272b | 585 | const char * |
0673c0ba | 586 | getMyHostname(void) |
44a47c6e | 587 | { |
95d659f0 | 588 | LOCAL_ARRAY(char, host, SQUIDHOSTNAMELEN + 1); |
44a47c6e | 589 | static int present = 0; |
cc192b50 | 590 | struct addrinfo *AI = NULL; |
b7ac5457 | 591 | Ip::Address sa; |
62e76326 | 592 | |
af85f811 | 593 | if (Config.visibleHostname != NULL) |
62e76326 | 594 | return Config.visibleHostname; |
595 | ||
d20b1cd0 | 596 | if (present) |
62e76326 | 597 | return host; |
598 | ||
d20b1cd0 | 599 | host[0] = '\0'; |
62e76326 | 600 | |
cc192b50 | 601 | if (Config.Sockaddr.http && sa.IsAnyAddr()) |
602 | sa = Config.Sockaddr.http->s; | |
62e76326 | 603 | |
aa2b5399 | 604 | #if USE_SSL |
62e76326 | 605 | |
cc192b50 | 606 | if (Config.Sockaddr.https && sa.IsAnyAddr()) |
607 | sa = Config.Sockaddr.https->http.s; | |
62e76326 | 608 | |
aa2b5399 | 609 | #endif |
cc192b50 | 610 | |
aa2b5399 | 611 | /* |
612 | * If the first http_port address has a specific address, try a | |
613 | * reverse DNS lookup on it. | |
614 | */ | |
26ac0430 | 615 | if ( !sa.IsAnyAddr() ) { |
62e76326 | 616 | |
cc192b50 | 617 | sa.GetAddrInfo(AI); |
618 | /* we are looking for a name. */ | |
27bc2077 | 619 | if (getnameinfo(AI->ai_addr, AI->ai_addrlen, host, SQUIDHOSTNAMELEN, NULL, 0, NI_NAMEREQD ) == 0) { |
62e76326 | 620 | /* DNS lookup successful */ |
621 | /* use the official name from DNS lookup */ | |
cc192b50 | 622 | debugs(50, 4, "getMyHostname: resolved " << sa << " to '" << host << "'"); |
bf8fe701 | 623 | |
62e76326 | 624 | present = 1; |
625 | ||
cc192b50 | 626 | sa.FreeAddrInfo(AI); |
627 | ||
62e76326 | 628 | if (strchr(host, '.')) |
629 | return host; | |
62e76326 | 630 | } |
631 | ||
cc192b50 | 632 | sa.FreeAddrInfo(AI); |
633 | debugs(50, 1, "WARNING: failed to resolve " << sa << " to a fully qualified hostname"); | |
26ac0430 | 634 | } else { |
cc192b50 | 635 | if (gethostname(host, SQUIDHOSTNAMELEN) < 0) { |
636 | debugs(50, 1, "WARNING: gethostname failed: " << xstrerror()); | |
26ac0430 | 637 | } else { |
cc192b50 | 638 | /* Verify that the hostname given resolves properly */ |
639 | struct addrinfo hints; | |
640 | memset(&hints, 0, sizeof(addrinfo)); | |
641 | hints.ai_flags = AI_CANONNAME; | |
642 | ||
27bc2077 | 643 | if (getaddrinfo(host, NULL, NULL, &AI) == 0) { |
cc192b50 | 644 | /* DNS lookup successful */ |
645 | /* use the official name from DNS lookup */ | |
626a9889 | 646 | debugs(50, 6, "getMyHostname: '" << host << "' has rDNS."); |
cc192b50 | 647 | present = 1; |
648 | ||
649 | /* AYJ: do we want to flag AI_ALL and cache the result anywhere. ie as our local host IPs? */ | |
26ac0430 | 650 | if (AI) { |
27bc2077 | 651 | freeaddrinfo(AI); |
cc192b50 | 652 | AI = NULL; |
653 | } | |
62e76326 | 654 | |
cc192b50 | 655 | return host; |
656 | } | |
657 | ||
27bc2077 | 658 | if (AI) freeaddrinfo(AI); |
626a9889 | 659 | debugs(50, 1, "WARNING: '" << host << "' rDNS test failed: " << xstrerror()); |
cc192b50 | 660 | } |
44a47c6e | 661 | } |
62e76326 | 662 | |
cc192b50 | 663 | /* throw a fatal configuration error when the Host/IP given has bad DNS/rDNS. */ |
a572d8be | 664 | if (opt_send_signal == -1) |
665 | fatal("Could not determine fully qualified hostname. Please set 'visible_hostname'\n"); | |
666 | else | |
667 | return ("localhost"); | |
668 | ||
d20b1cd0 | 669 | return NULL; /* keep compiler happy */ |
44a47c6e | 670 | } |
671 | ||
98829f69 | 672 | const char * |
673 | uniqueHostname(void) | |
674 | { | |
23c6ebc4 | 675 | debugs(21, 3, HERE << " Config: '" << Config.uniqueHostname << "'"); |
98829f69 | 676 | return Config.uniqueHostname ? Config.uniqueHostname : getMyHostname(); |
677 | } | |
678 | ||
23c6ebc4 | 679 | /** leave a priviliged section. (Give up any privilegies) |
30a4f2a8 | 680 | * Routines that need privilegies can rap themselves in enter_suid() |
681 | * and leave_suid() | |
682 | * To give upp all posibilites to gain privilegies use no_suid() | |
12b9e9b1 | 683 | */ |
b8d8561b | 684 | void |
0673c0ba | 685 | leave_suid(void) |
12b9e9b1 | 686 | { |
36584579 | 687 | debugs(21, 3, "leave_suid: PID " << getpid() << " called"); |
62e76326 | 688 | |
e3d74828 | 689 | if (Config.effectiveGroup) { |
690 | ||
691 | #if HAVE_SETGROUPS | |
692 | ||
693 | setgroups(1, &Config2.effectiveGroupID); | |
694 | ||
695 | #endif | |
696 | ||
697 | if (setgid(Config2.effectiveGroupID) < 0) | |
bf8fe701 | 698 | debugs(50, 0, "ALERT: setgid: " << xstrerror()); |
e3d74828 | 699 | |
700 | } | |
701 | ||
12b9e9b1 | 702 | if (geteuid() != 0) |
62e76326 | 703 | return; |
704 | ||
12b9e9b1 | 705 | /* Started as a root, check suid option */ |
b6f794d6 | 706 | if (Config.effectiveUser == NULL) |
62e76326 | 707 | return; |
708 | ||
36584579 | 709 | debugs(21, 3, "leave_suid: PID " << getpid() << " giving up root, becoming '" << Config.effectiveUser << "'"); |
62e76326 | 710 | |
e3d74828 | 711 | if (!Config.effectiveGroup) { |
62e76326 | 712 | |
e3d74828 | 713 | if (setgid(Config2.effectiveGroupID) < 0) |
bf8fe701 | 714 | debugs(50, 0, "ALERT: setgid: " << xstrerror()); |
62e76326 | 715 | |
e3d74828 | 716 | if (initgroups(Config.effectiveUser, Config2.effectiveGroupID) < 0) { |
bf8fe701 | 717 | debugs(50, 0, "ALERT: initgroups: unable to set groups for User " << |
718 | Config.effectiveUser << " and Group " << | |
719 | (unsigned) Config2.effectiveGroupID << ""); | |
e3d74828 | 720 | } |
721 | } | |
62e76326 | 722 | |
234967c9 | 723 | #if HAVE_SETRESUID |
62e76326 | 724 | |
d20b1cd0 | 725 | if (setresuid(Config2.effectiveUserID, Config2.effectiveUserID, 0) < 0) |
bf8fe701 | 726 | debugs(50, 0, "ALERT: setresuid: " << xstrerror()); |
62e76326 | 727 | |
234967c9 | 728 | #elif HAVE_SETEUID |
62e76326 | 729 | |
d20b1cd0 | 730 | if (seteuid(Config2.effectiveUserID) < 0) |
bf8fe701 | 731 | debugs(50, 0, "ALERT: seteuid: " << xstrerror()); |
62e76326 | 732 | |
234967c9 | 733 | #else |
62e76326 | 734 | |
d20b1cd0 | 735 | if (setuid(Config2.effectiveUserID) < 0) |
bf8fe701 | 736 | debugs(50, 0, "ALERT: setuid: " << xstrerror()); |
62e76326 | 737 | |
fc68f6b1 | 738 | #endif |
fc68f6b1 | 739 | |
329ce686 | 740 | restoreCapabilities(1); |
fc68f6b1 | 741 | |
62ae0622 | 742 | #if HAVE_PRCTL && defined(PR_SET_DUMPABLE) |
743 | /* Set Linux DUMPABLE flag */ | |
744 | if (Config.coredump_dir && prctl(PR_SET_DUMPABLE, 1) != 0) | |
bf8fe701 | 745 | debugs(50, 2, "ALERT: prctl: " << xstrerror()); |
62ae0622 | 746 | |
234967c9 | 747 | #endif |
748 | } | |
749 | ||
30a4f2a8 | 750 | /* Enter a privilegied section */ |
b8d8561b | 751 | void |
0673c0ba | 752 | enter_suid(void) |
234967c9 | 753 | { |
36584579 | 754 | debugs(21, 3, "enter_suid: PID " << getpid() << " taking root priveleges"); |
234967c9 | 755 | #if HAVE_SETRESUID |
62e76326 | 756 | |
e6ccf245 | 757 | setresuid((uid_t)-1, 0, (uid_t)-1); |
234967c9 | 758 | #else |
62e76326 | 759 | |
234967c9 | 760 | setuid(0); |
761 | #endif | |
62ae0622 | 762 | #if HAVE_PRCTL && defined(PR_SET_DUMPABLE) |
763 | /* Set Linux DUMPABLE flag */ | |
764 | ||
765 | if (Config.coredump_dir && prctl(PR_SET_DUMPABLE, 1) != 0) | |
bf8fe701 | 766 | debugs(50, 2, "ALERT: prctl: " << xstrerror()); |
62ae0622 | 767 | |
768 | #endif | |
234967c9 | 769 | } |
770 | ||
30a4f2a8 | 771 | /* Give up the posibility to gain privilegies. |
772 | * this should be used before starting a sub process | |
773 | */ | |
b8d8561b | 774 | void |
0673c0ba | 775 | no_suid(void) |
234967c9 | 776 | { |
777 | uid_t uid; | |
30a4f2a8 | 778 | leave_suid(); |
234967c9 | 779 | uid = geteuid(); |
329ce686 | 780 | debugs(21, 3, "no_suid: PID " << getpid() << " giving up root priveleges forever"); |
62e76326 | 781 | |
234967c9 | 782 | setuid(0); |
62e76326 | 783 | |
429fdbec | 784 | if (setuid(uid) < 0) |
bf8fe701 | 785 | debugs(50, 1, "no_suid: setuid: " << xstrerror()); |
62e76326 | 786 | |
329ce686 | 787 | restoreCapabilities(0); |
788 | ||
62ae0622 | 789 | #if HAVE_PRCTL && defined(PR_SET_DUMPABLE) |
790 | /* Set Linux DUMPABLE flag */ | |
791 | if (Config.coredump_dir && prctl(PR_SET_DUMPABLE, 1) != 0) | |
bf8fe701 | 792 | debugs(50, 2, "ALERT: prctl: " << xstrerror()); |
62ae0622 | 793 | |
234967c9 | 794 | #endif |
12b9e9b1 | 795 | } |
ccff9601 | 796 | |
b8d8561b | 797 | void |
0673c0ba | 798 | writePidFile(void) |
ccff9601 | 799 | { |
9e4ad609 | 800 | int fd; |
0b4639af | 801 | const char *f = NULL; |
973e9fe1 | 802 | mode_t old_umask; |
9e4ad609 | 803 | char buf[32]; |
62e76326 | 804 | |
9e4ad609 | 805 | if ((f = Config.pidFilename) == NULL) |
62e76326 | 806 | return; |
807 | ||
9e4ad609 | 808 | if (!strcmp(Config.pidFilename, "none")) |
62e76326 | 809 | return; |
810 | ||
30a4f2a8 | 811 | enter_suid(); |
62e76326 | 812 | |
973e9fe1 | 813 | old_umask = umask(022); |
62e76326 | 814 | |
c4aefe96 | 815 | fd = file_open(f, O_WRONLY | O_CREAT | O_TRUNC | O_TEXT); |
62e76326 | 816 | |
973e9fe1 | 817 | umask(old_umask); |
62e76326 | 818 | |
30a4f2a8 | 819 | leave_suid(); |
62e76326 | 820 | |
9e4ad609 | 821 | if (fd < 0) { |
bf8fe701 | 822 | debugs(50, 0, "" << f << ": " << xstrerror()); |
62e76326 | 823 | debug_trap("Could not write pid file"); |
824 | return; | |
ccff9601 | 825 | } |
62e76326 | 826 | |
56878878 | 827 | snprintf(buf, 32, "%d\n", (int) getpid()); |
1f7c9178 | 828 | FD_WRITE_METHOD(fd, buf, strlen(buf)); |
9e4ad609 | 829 | file_close(fd); |
ccff9601 | 830 | } |
c4fb974e | 831 | |
832 | ||
ff8d0ea6 | 833 | pid_t |
0673c0ba | 834 | readPidFile(void) |
7690e8eb | 835 | { |
836 | FILE *pid_fp = NULL; | |
9e4ad609 | 837 | const char *f = Config.pidFilename; |
1ee742a2 | 838 | char *chroot_f = NULL; |
ff8d0ea6 | 839 | pid_t pid = -1; |
840 | int i; | |
7690e8eb | 841 | |
9e4ad609 | 842 | if (f == NULL || !strcmp(Config.pidFilename, "none")) { |
7dbca7a4 | 843 | fprintf(stderr, APP_SHORTNAME ": ERROR: No pid file name defined\n"); |
62e76326 | 844 | exit(1); |
7690e8eb | 845 | } |
62e76326 | 846 | |
1ee742a2 | 847 | if (Config.chroot_dir && geteuid() == 0) { |
848 | int len = strlen(Config.chroot_dir) + 1 + strlen(f) + 1; | |
849 | chroot_f = (char *)xmalloc(strlen(Config.chroot_dir) + 1 + strlen(f) + 1); | |
850 | snprintf(chroot_f, len, "%s/%s", Config.chroot_dir, f); | |
851 | f = chroot_f; | |
852 | } | |
853 | ||
7690e8eb | 854 | pid_fp = fopen(f, "r"); |
62e76326 | 855 | |
7690e8eb | 856 | if (pid_fp != NULL) { |
62e76326 | 857 | pid = 0; |
858 | ||
859 | if (fscanf(pid_fp, "%d", &i) == 1) | |
860 | pid = (pid_t) i; | |
861 | ||
862 | fclose(pid_fp); | |
7690e8eb | 863 | } else { |
62e76326 | 864 | if (errno != ENOENT) { |
7dbca7a4 | 865 | fprintf(stderr, APP_SHORTNAME ": ERROR: Could not read pid file\n"); |
62e76326 | 866 | fprintf(stderr, "\t%s: %s\n", f, xstrerror()); |
867 | exit(1); | |
868 | } | |
7690e8eb | 869 | } |
62e76326 | 870 | |
1ee742a2 | 871 | safe_free(chroot_f); |
7690e8eb | 872 | return pid; |
873 | } | |
874 | ||
875 | ||
b8d8561b | 876 | void |
0673c0ba | 877 | setMaxFD(void) |
c4fb974e | 878 | { |
234967c9 | 879 | #if HAVE_SETRLIMIT |
c4fb974e | 880 | /* try to use as many file descriptors as possible */ |
881 | /* System V uses RLIMIT_NOFILE and BSD uses RLIMIT_OFILE */ | |
62e76326 | 882 | |
c4fb974e | 883 | struct rlimit rl; |
884 | #if defined(RLIMIT_NOFILE) | |
62e76326 | 885 | |
c4fb974e | 886 | if (getrlimit(RLIMIT_NOFILE, &rl) < 0) { |
bf8fe701 | 887 | debugs(50, 0, "setrlimit: RLIMIT_NOFILE: " << xstrerror()); |
c4fb974e | 888 | } else { |
62e76326 | 889 | rl.rlim_cur = Squid_MaxFD; |
890 | ||
891 | if (rl.rlim_cur > rl.rlim_max) | |
892 | Squid_MaxFD = rl.rlim_cur = rl.rlim_max; | |
893 | ||
894 | if (setrlimit(RLIMIT_NOFILE, &rl) < 0) { | |
895 | snprintf(tmp_error_buf, ERROR_BUF_SZ, | |
896 | "setrlimit: RLIMIT_NOFILE: %s", xstrerror()); | |
897 | fatal_dump(tmp_error_buf); | |
898 | } | |
c4fb974e | 899 | } |
62e76326 | 900 | |
c4fb974e | 901 | #elif defined(RLIMIT_OFILE) |
902 | if (getrlimit(RLIMIT_OFILE, &rl) < 0) { | |
bf8fe701 | 903 | debugs(50, 0, "setrlimit: RLIMIT_NOFILE: " << xstrerror()); |
c4fb974e | 904 | } else { |
62e76326 | 905 | rl.rlim_cur = Squid_MaxFD; |
906 | ||
907 | if (rl.rlim_cur > rl.rlim_max) | |
908 | Squid_MaxFD = rl.rlim_cur = rl.rlim_max; | |
909 | ||
910 | if (setrlimit(RLIMIT_OFILE, &rl) < 0) { | |
911 | snprintf(tmp_error_buf, ERROR_BUF_SZ, | |
912 | "setrlimit: RLIMIT_OFILE: %s", xstrerror()); | |
913 | fatal_dump(tmp_error_buf); | |
914 | } | |
c4fb974e | 915 | } |
62e76326 | 916 | |
c4fb974e | 917 | #endif |
c4fb974e | 918 | #else /* HAVE_SETRLIMIT */ |
bf8fe701 | 919 | debugs(21, 1, "setMaxFD: Cannot increase: setrlimit() not supported on this system"); |
62e76326 | 920 | |
30a4f2a8 | 921 | #endif /* HAVE_SETRLIMIT */ |
922 | ||
923 | #if HAVE_SETRLIMIT && defined(RLIMIT_DATA) | |
62e76326 | 924 | |
30a4f2a8 | 925 | if (getrlimit(RLIMIT_DATA, &rl) < 0) { |
bf8fe701 | 926 | debugs(50, 0, "getrlimit: RLIMIT_DATA: " << xstrerror()); |
88738790 | 927 | } else if (rl.rlim_max > rl.rlim_cur) { |
62e76326 | 928 | rl.rlim_cur = rl.rlim_max; /* set it to the max */ |
929 | ||
930 | if (setrlimit(RLIMIT_DATA, &rl) < 0) { | |
931 | snprintf(tmp_error_buf, ERROR_BUF_SZ, | |
932 | "setrlimit: RLIMIT_DATA: %s", xstrerror()); | |
933 | fatal_dump(tmp_error_buf); | |
934 | } | |
30a4f2a8 | 935 | } |
62e76326 | 936 | |
30a4f2a8 | 937 | #endif /* RLIMIT_DATA */ |
ad7ef91a | 938 | #if HAVE_SETRLIMIT && defined(RLIMIT_VMEM) |
939 | if (getrlimit(RLIMIT_VMEM, &rl) < 0) { | |
bf8fe701 | 940 | debugs(50, 0, "getrlimit: RLIMIT_VMEM: " << xstrerror()); |
88738790 | 941 | } else if (rl.rlim_max > rl.rlim_cur) { |
62e76326 | 942 | rl.rlim_cur = rl.rlim_max; /* set it to the max */ |
943 | ||
944 | if (setrlimit(RLIMIT_VMEM, &rl) < 0) { | |
945 | snprintf(tmp_error_buf, ERROR_BUF_SZ, | |
946 | "setrlimit: RLIMIT_VMEM: %s", xstrerror()); | |
947 | fatal_dump(tmp_error_buf); | |
948 | } | |
ad7ef91a | 949 | } |
62e76326 | 950 | |
ad7ef91a | 951 | #endif /* RLIMIT_VMEM */ |
c4fb974e | 952 | } |
3a57089e | 953 | |
b8d8561b | 954 | void |
ea3a2a69 | 955 | squid_signal(int sig, SIGHDLR * func, int flags) |
30a4f2a8 | 956 | { |
957 | #if HAVE_SIGACTION | |
62e76326 | 958 | |
30a4f2a8 | 959 | struct sigaction sa; |
960 | sa.sa_handler = func; | |
961 | sa.sa_flags = flags; | |
962 | sigemptyset(&sa.sa_mask); | |
62e76326 | 963 | |
30a4f2a8 | 964 | if (sigaction(sig, &sa, NULL) < 0) |
bf8fe701 | 965 | debugs(50, 0, "sigaction: sig=" << sig << " func=" << func << ": " << xstrerror()); |
62e76326 | 966 | |
30a4f2a8 | 967 | #else |
06648839 | 968 | #ifdef _SQUID_MSWIN_ |
969 | /* | |
970 | On Windows, only SIGINT, SIGILL, SIGFPE, SIGTERM, SIGBREAK, SIGABRT and SIGSEGV signals | |
971 | are supported, so we must care of don't call signal() for other value. | |
972 | The SIGILL, SIGSEGV, and SIGTERM signals are not generated under Windows. They are defined | |
973 | for ANSI compatibility, so both SIGSEGV and SIGBUS are emulated with an Exception Handler. | |
974 | */ | |
975 | switch (sig) { | |
976 | ||
977 | case SIGINT: | |
978 | ||
979 | case SIGILL: | |
980 | ||
981 | case SIGFPE: | |
982 | ||
983 | case SIGTERM: | |
984 | ||
985 | case SIGBREAK: | |
986 | ||
987 | case SIGABRT: | |
988 | break; | |
989 | ||
990 | case SIGSEGV: | |
991 | WIN32_ExceptionHandlerInit(); | |
992 | break; | |
993 | ||
994 | case SIGBUS: | |
995 | WIN32_ExceptionHandlerInit(); | |
996 | return; | |
997 | break; /* Nor reached */ | |
998 | ||
999 | default: | |
1000 | return; | |
1001 | break; /* Nor reached */ | |
1002 | } | |
1003 | ||
1004 | #endif | |
62e76326 | 1005 | |
06648839 | 1006 | signal(sig, func); |
62e76326 | 1007 | |
30a4f2a8 | 1008 | #endif |
1009 | } | |
396c5745 | 1010 | |
70364f29 | 1011 | void |
1012 | logsFlush(void) | |
1013 | { | |
1014 | if (debug_log) | |
62e76326 | 1015 | fflush(debug_log); |
70364f29 | 1016 | } |
88738790 | 1017 | |
16300b58 | 1018 | void |
0e473d70 | 1019 | kb_incr(kb_t * k, size_t v) |
a7c05555 | 1020 | { |
0e473d70 | 1021 | k->bytes += v; |
1022 | k->kb += (k->bytes >> 10); | |
1023 | k->bytes &= 0x3FF; | |
a7c05555 | 1024 | } |
c1dabf04 | 1025 | |
a00a7c85 | 1026 | void |
6bbf9cc4 | 1027 | debugObj(int section, int level, const char *label, void *obj, ObjPackMethod pm) |
a00a7c85 | 1028 | { |
1029 | MemBuf mb; | |
1030 | Packer p; | |
6bbf9cc4 | 1031 | assert(label && obj && pm); |
2fe7eff9 | 1032 | mb.init(); |
a00a7c85 | 1033 | packerToMemInit(&p, &mb); |
0cdcddb9 | 1034 | (*pm) (obj, &p); |
bf8fe701 | 1035 | debugs(section, level, "" << label << "" << mb.buf << ""); |
a00a7c85 | 1036 | packerClean(&p); |
2fe7eff9 | 1037 | mb.clean(); |
a00a7c85 | 1038 | } |
d548ee64 | 1039 | |
0e70aa1e | 1040 | void |
1041 | parseEtcHosts(void) | |
1042 | { | |
1043 | FILE *fp; | |
1044 | char buf[1024]; | |
1045 | char buf2[512]; | |
1046 | char *nt = buf; | |
1047 | char *lt = buf; | |
fa2bfbab | 1048 | |
0e70aa1e | 1049 | if (NULL == Config.etcHostsPath) |
62e76326 | 1050 | return; |
1051 | ||
0e70aa1e | 1052 | if (0 == strcmp(Config.etcHostsPath, "none")) |
62e76326 | 1053 | return; |
1054 | ||
0e70aa1e | 1055 | fp = fopen(Config.etcHostsPath, "r"); |
62e76326 | 1056 | |
0e70aa1e | 1057 | if (fp == NULL) { |
bf8fe701 | 1058 | debugs(1, 1, "parseEtcHosts: " << Config.etcHostsPath << ": " << xstrerror()); |
62e76326 | 1059 | return; |
0e70aa1e | 1060 | } |
62e76326 | 1061 | |
ec4daaa5 | 1062 | #ifdef _SQUID_WIN32_ |
c4aefe96 | 1063 | setmode(fileno(fp), O_TEXT); |
62e76326 | 1064 | |
c4aefe96 | 1065 | #endif |
62e76326 | 1066 | |
0e70aa1e | 1067 | while (fgets(buf, 1024, fp)) { /* for each line */ |
62e76326 | 1068 | wordlist *hosts = NULL; |
1069 | char *addr; | |
1070 | ||
c31616ae | 1071 | if (buf[0] == '#') /* MS-windows likes to add comments */ |
1072 | continue; | |
1073 | ||
7a10c315 | 1074 | strtok(buf, "#"); /* chop everything following a comment marker */ |
62e76326 | 1075 | |
1076 | lt = buf; | |
1077 | ||
1078 | addr = buf; | |
1079 | ||
bf8fe701 | 1080 | debugs(1, 5, "etc_hosts: line is '" << buf << "'"); |
62e76326 | 1081 | |
1082 | nt = strpbrk(lt, w_space); | |
1083 | ||
1084 | if (nt == NULL) /* empty line */ | |
1085 | continue; | |
1086 | ||
1087 | *nt = '\0'; /* null-terminate the address */ | |
1088 | ||
bf8fe701 | 1089 | debugs(1, 5, "etc_hosts: address is '" << addr << "'"); |
62e76326 | 1090 | |
1091 | lt = nt + 1; | |
1092 | ||
1093 | while ((nt = strpbrk(lt, w_space))) { | |
1094 | char *host = NULL; | |
1095 | ||
1096 | if (nt == lt) { /* multiple spaces */ | |
bf8fe701 | 1097 | debugs(1, 5, "etc_hosts: multiple spaces, skipping"); |
62e76326 | 1098 | lt = nt + 1; |
1099 | continue; | |
1100 | } | |
1101 | ||
1102 | *nt = '\0'; | |
bf8fe701 | 1103 | debugs(1, 5, "etc_hosts: got hostname '" << lt << "'"); |
62e76326 | 1104 | |
1105 | if (Config.appendDomain && !strchr(lt, '.')) { | |
1106 | /* I know it's ugly, but it's only at reconfig */ | |
1107 | strncpy(buf2, lt, 512); | |
3fbd26b5 | 1108 | strncat(buf2, Config.appendDomain, 512 - strlen(lt) - 1); |
62e76326 | 1109 | host = buf2; |
1110 | } else { | |
1111 | host = lt; | |
1112 | } | |
1113 | ||
f6a72b33 AJ |
1114 | if (ipcacheAddEntryFromHosts(host, addr) != 0) { |
1115 | /* invalid address, continuing is useless */ | |
1116 | wordlistDestroy(&hosts); | |
1117 | hosts = NULL; | |
1118 | break; | |
1119 | } | |
62e76326 | 1120 | wordlistAdd(&hosts, host); |
1121 | ||
1122 | lt = nt + 1; | |
1123 | } | |
1124 | ||
9e008dda | 1125 | if (hosts) { |
f6a72b33 AJ |
1126 | fqdncacheAddEntryFromHosts(addr, hosts); |
1127 | wordlistDestroy(&hosts); | |
1128 | } | |
0e70aa1e | 1129 | } |
62e76326 | 1130 | |
1f3c7397 | 1131 | fclose (fp); |
0e70aa1e | 1132 | } |
52f772de | 1133 | |
1134 | int | |
1135 | getMyPort(void) | |
1136 | { | |
52f772de | 1137 | if (Config.Sockaddr.http) |
cc192b50 | 1138 | return Config.Sockaddr.http->s.GetPort(); |
62e76326 | 1139 | |
a2727cdb | 1140 | #if USE_SSL |
62e76326 | 1141 | |
a2727cdb | 1142 | if (Config.Sockaddr.https) |
cc192b50 | 1143 | return Config.Sockaddr.https->http.s.GetPort(); |
62e76326 | 1144 | |
52f772de | 1145 | #endif |
62e76326 | 1146 | |
a2727cdb | 1147 | fatal("No port defined"); |
62e76326 | 1148 | |
bac6d4bd | 1149 | return 0; /* NOT REACHED */ |
52f772de | 1150 | } |
d860a1aa | 1151 | |
c642c141 AJ |
1152 | /* |
1153 | * Set the umask to at least the given mask. This is in addition | |
1154 | * to the umask set at startup | |
1155 | */ | |
1156 | void | |
1157 | setUmask(mode_t mask) | |
1158 | { | |
1159 | // No way to get the current umask value without setting it. | |
1160 | static const mode_t orig_umask = umask(mask); // once, to get | |
1161 | umask(mask | orig_umask); // always, to set | |
1162 | } | |
d860a1aa | 1163 | |
1164 | /* | |
1165 | * Inverse of strwordtok. Quotes a word if needed | |
1166 | */ | |
42419a95 | 1167 | void |
d860a1aa | 1168 | strwordquote(MemBuf * mb, const char *str) |
1169 | { | |
1170 | int quoted = 0; | |
62e76326 | 1171 | |
d860a1aa | 1172 | if (strchr(str, ' ')) { |
62e76326 | 1173 | quoted = 1; |
2fe7eff9 | 1174 | mb->append("\"", 1); |
d860a1aa | 1175 | } |
62e76326 | 1176 | |
d860a1aa | 1177 | while (*str) { |
dc1af3cf | 1178 | int l = strcspn(str, "\"\\\n\r"); |
2fe7eff9 | 1179 | mb->append(str, l); |
62e76326 | 1180 | str += l; |
1181 | ||
26ac0430 | 1182 | switch (*str) { |
dc1af3cf | 1183 | |
1184 | case '\n': | |
2fe7eff9 | 1185 | mb->append("\\n", 2); |
dc1af3cf | 1186 | str++; |
1187 | break; | |
1188 | ||
1189 | case '\r': | |
2fe7eff9 | 1190 | mb->append("\\r", 2); |
dc1af3cf | 1191 | str++; |
1192 | break; | |
1193 | ||
1194 | case '\0': | |
1195 | break; | |
1196 | ||
1197 | default: | |
2fe7eff9 | 1198 | mb->append("\\", 1); |
1199 | mb->append(str, 1); | |
62e76326 | 1200 | str++; |
dc1af3cf | 1201 | break; |
62e76326 | 1202 | } |
d860a1aa | 1203 | } |
62e76326 | 1204 | |
d860a1aa | 1205 | if (quoted) |
2fe7eff9 | 1206 | mb->append("\"", 1); |
d860a1aa | 1207 | } |
fc68f6b1 | 1208 | |
1209 | void | |
1210 | keepCapabilities(void) | |
1211 | { | |
b7ac5457 | 1212 | #if USE_LIBCAP && HAVE_PRCTL && defined(PR_SET_KEEPCAPS) |
329ce686 | 1213 | |
1214 | if (prctl(PR_SET_KEEPCAPS, 1, 0, 0, 0)) { | |
b7ac5457 | 1215 | Ip::Interceptor.StopTransparency("capability setting has failed."); |
fc68f6b1 | 1216 | } |
fc68f6b1 | 1217 | #endif |
1218 | } | |
329ce686 | 1219 | |
1220 | static void | |
1221 | restoreCapabilities(int keep) | |
1222 | { | |
9e008dda | 1223 | /* NP: keep these two if-endif separate. Non-Linux work perfectly well without Linux syscap support. */ |
b64b6030 | 1224 | #if USE_LIBCAP |
c3487a77 HN |
1225 | cap_t caps; |
1226 | if (keep) | |
1227 | caps = cap_get_proc(); | |
1228 | else | |
1229 | caps = cap_init(); | |
1230 | if (!caps) { | |
b7ac5457 | 1231 | Ip::Interceptor.StopTransparency("Can't get current capabilities"); |
9e008dda | 1232 | } else { |
c3487a77 HN |
1233 | int ncaps = 0; |
1234 | int rc = 0; | |
1235 | cap_value_t cap_list[10]; | |
1236 | cap_list[ncaps++] = CAP_NET_BIND_SERVICE; | |
87632631 | 1237 | |
b7ac5457 | 1238 | if (Ip::Interceptor.TransparentActive()) { |
c3487a77 | 1239 | cap_list[ncaps++] = CAP_NET_ADMIN; |
fc32ce2e | 1240 | } |
329ce686 | 1241 | |
c3487a77 HN |
1242 | cap_clear_flag(caps, CAP_EFFECTIVE); |
1243 | rc |= cap_set_flag(caps, CAP_EFFECTIVE, ncaps, cap_list, CAP_SET); | |
1244 | rc |= cap_set_flag(caps, CAP_PERMITTED, ncaps, cap_list, CAP_SET); | |
329ce686 | 1245 | |
c3487a77 | 1246 | if (rc || cap_set_proc(caps) != 0) { |
b7ac5457 | 1247 | Ip::Interceptor.StopTransparency("Error enabling needed capabilities."); |
b5bd96ce | 1248 | } |
c3487a77 | 1249 | cap_free(caps); |
329ce686 | 1250 | } |
b64b6030 | 1251 | #elif defined(_SQUID_LINUX_) |
b7ac5457 | 1252 | Ip::Interceptor.StopTransparency("Missing needed capability support."); |
b5bd96ce | 1253 | #endif /* HAVE_SYS_CAPABILITY_H */ |
329ce686 | 1254 | } |
cc192b50 | 1255 | |
1256 | void * | |
1257 | xmemset(void *dst, int val, size_t sz) | |
1258 | { | |
1259 | // do debugs output | |
1260 | debugs(63, 9, "memset: dst=" << dst << ", val=" << val << ", bytes=" << sz); | |
1261 | ||
1262 | // call the system one to do the actual work ~safely. | |
1263 | return memset(dst, val, sz); | |
1264 | } |