Commit | Line | Data |
aadcc3c8 |
1 | /* |
0198fd3c |
2 | * os_unix.c -- |
3 | * |
4 | * Description of file. |
5 | * |
6 | * |
7 | * Copyright (c) 1995 Open Market, Inc. |
8 | * All rights reserved. |
9 | * |
10 | * This file contains proprietary and confidential information and |
aadcc3c8 |
11 | * remains the unpublished property of Open Market, Inc. Use, |
12 | * disclosure, or reproduction is prohibited except as permitted by |
13 | * express written license agreement with Open Market, Inc. |
0198fd3c |
14 | * |
15 | * Bill Snapper |
16 | * snapper@openmarket.com |
17 | */ |
18 | |
19 | #ifndef lint |
2a7273a1 |
20 | static const char rcsid[] = "$Id: os_unix.c,v 1.38 2003/06/22 00:16:43 robs Exp $"; |
0198fd3c |
21 | #endif /* not lint */ |
22 | |
6ad90ad2 |
23 | #include "fcgi_config.h" |
0198fd3c |
24 | |
27064097 |
25 | #include <sys/types.h> |
26 | |
8db9dd8f |
27 | #ifdef HAVE_NETINET_IN_H |
28 | #include <netinet/in.h> |
29 | #endif |
30 | |
6ad90ad2 |
31 | #include <arpa/inet.h> |
0198fd3c |
32 | #include <assert.h> |
0198fd3c |
33 | #include <errno.h> |
6ad90ad2 |
34 | #include <fcntl.h> /* for fcntl */ |
0198fd3c |
35 | #include <math.h> |
6ad90ad2 |
36 | #include <memory.h> /* for memchr() */ |
37 | #include <netinet/tcp.h> |
38 | #include <stdarg.h> |
39 | #include <stdio.h> |
40 | #include <stdlib.h> |
41 | #include <string.h> |
42 | #include <sys/time.h> |
0198fd3c |
43 | #include <sys/un.h> |
d0686b0d |
44 | #include <signal.h> |
6ad90ad2 |
45 | |
0198fd3c |
46 | #ifdef HAVE_NETDB_H |
47 | #include <netdb.h> |
48 | #endif |
0198fd3c |
49 | |
6ad90ad2 |
50 | #ifdef HAVE_SYS_SOCKET_H |
51 | #include <sys/socket.h> /* for getpeername */ |
52 | #endif |
53 | |
54 | #ifdef HAVE_UNISTD_H |
55 | #include <unistd.h> |
56 | #endif |
57 | |
58 | #include "fastcgi.h" |
6ad90ad2 |
59 | #include "fcgimisc.h" |
0198fd3c |
60 | #include "fcgios.h" |
61 | |
03f366ba |
62 | #ifndef INADDR_NONE |
63 | #define INADDR_NONE ((unsigned long) -1) |
64 | #endif |
65 | |
0198fd3c |
66 | /* |
67 | * This structure holds an entry for each oustanding async I/O operation. |
68 | */ |
69 | typedef struct { |
70 | OS_AsyncProc procPtr; /* callout completion procedure */ |
71 | ClientData clientData; /* caller private data */ |
72 | int fd; |
73 | int len; |
74 | int offset; |
75 | void *buf; |
76 | int inUse; |
77 | } AioInfo; |
78 | |
79 | /* |
80 | * Entries in the async I/O table are allocated 2 per file descriptor. |
81 | * |
82 | * Read Entry Index = fd * 2 |
83 | * Write Entry Index = (fd * 2) + 1 |
84 | */ |
85 | #define AIO_RD_IX(fd) (fd * 2) |
86 | #define AIO_WR_IX(fd) ((fd * 2) + 1) |
87 | |
2b391aca |
88 | static int asyncIoInUse = FALSE; |
0198fd3c |
89 | static int asyncIoTableSize = 16; |
90 | static AioInfo *asyncIoTable = NULL; |
0198fd3c |
91 | |
0198fd3c |
92 | static int libInitialized = FALSE; |
93 | |
94 | static fd_set readFdSet; |
95 | static fd_set writeFdSet; |
96 | |
97 | static fd_set readFdSetPost; |
98 | static int numRdPosted = 0; |
99 | static fd_set writeFdSetPost; |
100 | static int numWrPosted = 0; |
101 | static int volatile maxFd = -1; |
102 | |
d0686b0d |
103 | static int shutdownPending = FALSE; |
104 | static int shutdownNow = FALSE; |
105 | |
d0686b0d |
106 | void OS_ShutdownPending() |
107 | { |
108 | shutdownPending = TRUE; |
109 | } |
110 | |
994e1bb8 |
111 | static void OS_Sigusr1Handler(int signo) |
d0686b0d |
112 | { |
113 | OS_ShutdownPending(); |
114 | } |
115 | |
994e1bb8 |
116 | static void OS_SigpipeHandler(int signo) |
d0686b0d |
117 | { |
118 | ; |
119 | } |
120 | |
121 | static void installSignalHandler(int signo, const struct sigaction * act, int force) |
122 | { |
123 | struct sigaction sa; |
124 | |
125 | sigaction(signo, NULL, &sa); |
126 | |
127 | if (force || sa.sa_handler == SIG_DFL) |
128 | { |
129 | sigaction(signo, act, NULL); |
130 | } |
131 | } |
132 | |
994e1bb8 |
133 | static void OS_InstallSignalHandlers(int force) |
d0686b0d |
134 | { |
135 | struct sigaction sa; |
136 | |
137 | sigemptyset(&sa.sa_mask); |
138 | sa.sa_flags = 0; |
139 | |
140 | sa.sa_handler = OS_SigpipeHandler; |
141 | installSignalHandler(SIGPIPE, &sa, force); |
142 | |
143 | sa.sa_handler = OS_Sigusr1Handler; |
144 | installSignalHandler(SIGUSR1, &sa, force); |
d0686b0d |
145 | } |
146 | |
0198fd3c |
147 | /* |
148 | *-------------------------------------------------------------- |
149 | * |
150 | * OS_LibInit -- |
151 | * |
152 | * Set up the OS library for use. |
153 | * |
154 | * NOTE: This function is really only needed for application |
155 | * asynchronous I/O. It will most likely change in the |
156 | * future to setup the multi-threaded environment. |
157 | * |
158 | * Results: |
159 | * Returns 0 if success, -1 if not. |
160 | * |
161 | * Side effects: |
162 | * Async I/O table allocated and initialized. |
163 | * |
164 | *-------------------------------------------------------------- |
165 | */ |
166 | int OS_LibInit(int stdioFds[3]) |
167 | { |
168 | if(libInitialized) |
169 | return 0; |
aadcc3c8 |
170 | |
171 | asyncIoTable = (AioInfo *)malloc(asyncIoTableSize * sizeof(AioInfo)); |
0198fd3c |
172 | if(asyncIoTable == NULL) { |
173 | errno = ENOMEM; |
174 | return -1; |
175 | } |
176 | memset((char *) asyncIoTable, 0, |
177 | asyncIoTableSize * sizeof(AioInfo)); |
178 | |
179 | FD_ZERO(&readFdSet); |
180 | FD_ZERO(&writeFdSet); |
181 | FD_ZERO(&readFdSetPost); |
182 | FD_ZERO(&writeFdSetPost); |
d0686b0d |
183 | |
9ab74998 |
184 | OS_InstallSignalHandlers(TRUE); |
d0686b0d |
185 | |
0198fd3c |
186 | libInitialized = TRUE; |
d0686b0d |
187 | |
0198fd3c |
188 | return 0; |
189 | } |
190 | |
0198fd3c |
191 | /* |
192 | *-------------------------------------------------------------- |
193 | * |
194 | * OS_LibShutdown -- |
195 | * |
196 | * Shutdown the OS library. |
197 | * |
198 | * Results: |
199 | * None. |
200 | * |
201 | * Side effects: |
202 | * Memory freed, fds closed. |
203 | * |
204 | *-------------------------------------------------------------- |
205 | */ |
206 | void OS_LibShutdown() |
207 | { |
208 | if(!libInitialized) |
209 | return; |
aadcc3c8 |
210 | |
0198fd3c |
211 | free(asyncIoTable); |
212 | asyncIoTable = NULL; |
213 | libInitialized = FALSE; |
214 | return; |
215 | } |
216 | |
0198fd3c |
217 | /* |
218 | *---------------------------------------------------------------------- |
219 | * |
220 | * OS_BuildSockAddrUn -- |
221 | * |
222 | * Using the pathname bindPath, fill in the sockaddr_un structure |
223 | * *servAddrPtr and the length of this structure *servAddrLen. |
224 | * |
225 | * The format of the sockaddr_un structure changed incompatibly in |
226 | * 4.3BSD Reno. Digital UNIX supports both formats, other systems |
227 | * support one or the other. |
228 | * |
229 | * Results: |
230 | * 0 for normal return, -1 for failure (bindPath too long). |
231 | * |
232 | *---------------------------------------------------------------------- |
233 | */ |
234 | |
0b7c9662 |
235 | static int OS_BuildSockAddrUn(const char *bindPath, |
0198fd3c |
236 | struct sockaddr_un *servAddrPtr, |
237 | int *servAddrLen) |
238 | { |
239 | int bindPathLen = strlen(bindPath); |
240 | |
241 | #ifdef HAVE_SOCKADDR_UN_SUN_LEN /* 4.3BSD Reno and later: BSDI, DEC */ |
242 | if(bindPathLen >= sizeof(servAddrPtr->sun_path)) { |
243 | return -1; |
244 | } |
245 | #else /* 4.3 BSD Tahoe: Solaris, HPUX, DEC, ... */ |
246 | if(bindPathLen > sizeof(servAddrPtr->sun_path)) { |
247 | return -1; |
248 | } |
249 | #endif |
250 | memset((char *) servAddrPtr, 0, sizeof(*servAddrPtr)); |
251 | servAddrPtr->sun_family = AF_UNIX; |
252 | memcpy(servAddrPtr->sun_path, bindPath, bindPathLen); |
253 | #ifdef HAVE_SOCKADDR_UN_SUN_LEN /* 4.3BSD Reno and later: BSDI, DEC */ |
254 | *servAddrLen = sizeof(servAddrPtr->sun_len) |
255 | + sizeof(servAddrPtr->sun_family) |
256 | + bindPathLen + 1; |
257 | servAddrPtr->sun_len = *servAddrLen; |
258 | #else /* 4.3 BSD Tahoe: Solaris, HPUX, DEC, ... */ |
259 | *servAddrLen = sizeof(servAddrPtr->sun_family) + bindPathLen; |
260 | #endif |
261 | return 0; |
262 | } |
0198fd3c |
263 | union SockAddrUnion { |
264 | struct sockaddr_un unixVariant; |
265 | struct sockaddr_in inetVariant; |
266 | }; |
267 | |
0198fd3c |
268 | /* |
269 | * OS_CreateLocalIpcFd -- |
270 | * |
271 | * This procedure is responsible for creating the listener socket |
272 | * on Unix for local process communication. It will create a |
273 | * domain socket or a TCP/IP socket bound to "localhost" and return |
274 | * a file descriptor to it to the caller. |
275 | * |
276 | * Results: |
277 | * Listener socket created. This call returns either a valid |
278 | * file descriptor or -1 on error. |
279 | * |
280 | * Side effects: |
281 | * None. |
282 | * |
283 | *---------------------------------------------------------------------- |
284 | */ |
0b7c9662 |
285 | int OS_CreateLocalIpcFd(const char *bindPath, int backlog) |
0198fd3c |
286 | { |
287 | int listenSock, servLen; |
630ce256 |
288 | union SockAddrUnion sa; |
0198fd3c |
289 | int tcp = FALSE; |
9f2857f4 |
290 | unsigned long tcp_ia = 0; |
0198fd3c |
291 | char *tp; |
9f2857f4 |
292 | short port = 0; |
0198fd3c |
293 | char host[MAXPATHLEN]; |
294 | |
295 | strcpy(host, bindPath); |
296 | if((tp = strchr(host, ':')) != 0) { |
297 | *tp++ = 0; |
298 | if((port = atoi(tp)) == 0) { |
299 | *--tp = ':'; |
300 | } else { |
301 | tcp = TRUE; |
302 | } |
303 | } |
03f366ba |
304 | if(tcp) { |
305 | if (!*host || !strcmp(host,"*")) { |
306 | tcp_ia = htonl(INADDR_ANY); |
307 | } else { |
308 | tcp_ia = inet_addr(host); |
309 | if (tcp_ia == INADDR_NONE) { |
310 | struct hostent * hep; |
311 | hep = gethostbyname(host); |
312 | if ((!hep) || (hep->h_addrtype != AF_INET || !hep->h_addr_list[0])) { |
313 | fprintf(stderr, "Cannot resolve host name %s -- exiting!\n", host); |
314 | exit(1); |
315 | } |
316 | if (hep->h_addr_list[1]) { |
317 | fprintf(stderr, "Host %s has multiple addresses ---\n", host); |
318 | fprintf(stderr, "you must choose one explicitly!!!\n"); |
319 | exit(1); |
320 | } |
321 | tcp_ia = ((struct in_addr *) (hep->h_addr))->s_addr; |
322 | } |
323 | } |
0198fd3c |
324 | } |
325 | |
326 | if(tcp) { |
327 | listenSock = socket(AF_INET, SOCK_STREAM, 0); |
328 | if(listenSock >= 0) { |
329 | int flag = 1; |
330 | if(setsockopt(listenSock, SOL_SOCKET, SO_REUSEADDR, |
331 | (char *) &flag, sizeof(flag)) < 0) { |
332 | fprintf(stderr, "Can't set SO_REUSEADDR.\n"); |
333 | exit(1001); |
334 | } |
335 | } |
336 | } else { |
337 | listenSock = socket(AF_UNIX, SOCK_STREAM, 0); |
338 | } |
339 | if(listenSock < 0) { |
340 | return -1; |
341 | } |
342 | |
343 | /* |
344 | * Bind the listening socket. |
345 | */ |
346 | if(tcp) { |
347 | memset((char *) &sa.inetVariant, 0, sizeof(sa.inetVariant)); |
348 | sa.inetVariant.sin_family = AF_INET; |
03f366ba |
349 | sa.inetVariant.sin_addr.s_addr = tcp_ia; |
0198fd3c |
350 | sa.inetVariant.sin_port = htons(port); |
351 | servLen = sizeof(sa.inetVariant); |
352 | } else { |
353 | unlink(bindPath); |
354 | if(OS_BuildSockAddrUn(bindPath, &sa.unixVariant, &servLen)) { |
355 | fprintf(stderr, "Listening socket's path name is too long.\n"); |
356 | exit(1000); |
357 | } |
358 | } |
359 | if(bind(listenSock, (struct sockaddr *) &sa.unixVariant, servLen) < 0 |
0b7c9662 |
360 | || listen(listenSock, backlog) < 0) { |
0198fd3c |
361 | perror("bind/listen"); |
362 | exit(errno); |
363 | } |
364 | |
365 | return listenSock; |
366 | } |
367 | |
0198fd3c |
368 | /* |
369 | *---------------------------------------------------------------------- |
370 | * |
371 | * OS_FcgiConnect -- |
372 | * |
373 | * Create the socket and connect to the remote application if |
374 | * possible. |
375 | * |
376 | * This was lifted from the cgi-fcgi application and was abstracted |
377 | * out because Windows NT does not have a domain socket and must |
378 | * use a named pipe which has a different API altogether. |
379 | * |
380 | * Results: |
381 | * -1 if fail or a valid file descriptor if connection succeeds. |
382 | * |
383 | * Side effects: |
384 | * Remote connection established. |
385 | * |
386 | *---------------------------------------------------------------------- |
387 | */ |
388 | int OS_FcgiConnect(char *bindPath) |
389 | { |
390 | union SockAddrUnion sa; |
391 | int servLen, resultSock; |
392 | int connectStatus; |
393 | char *tp; |
394 | char host[MAXPATHLEN]; |
df986e9d |
395 | short port = 0; |
0198fd3c |
396 | int tcp = FALSE; |
397 | |
398 | strcpy(host, bindPath); |
399 | if((tp = strchr(host, ':')) != 0) { |
400 | *tp++ = 0; |
401 | if((port = atoi(tp)) == 0) { |
402 | *--tp = ':'; |
403 | } else { |
404 | tcp = TRUE; |
405 | } |
406 | } |
407 | if(tcp == TRUE) { |
408 | struct hostent *hp; |
409 | if((hp = gethostbyname((*host ? host : "localhost"))) == NULL) { |
410 | fprintf(stderr, "Unknown host: %s\n", bindPath); |
411 | exit(1000); |
412 | } |
413 | sa.inetVariant.sin_family = AF_INET; |
203fd55e |
414 | memcpy(&sa.inetVariant.sin_addr, hp->h_addr, hp->h_length); |
0198fd3c |
415 | sa.inetVariant.sin_port = htons(port); |
416 | servLen = sizeof(sa.inetVariant); |
417 | resultSock = socket(AF_INET, SOCK_STREAM, 0); |
418 | } else { |
419 | if(OS_BuildSockAddrUn(bindPath, &sa.unixVariant, &servLen)) { |
420 | fprintf(stderr, "Listening socket's path name is too long.\n"); |
421 | exit(1000); |
422 | } |
423 | resultSock = socket(AF_UNIX, SOCK_STREAM, 0); |
424 | } |
425 | |
6f902b14 |
426 | ASSERT(resultSock >= 0); |
0198fd3c |
427 | connectStatus = connect(resultSock, (struct sockaddr *) &sa.unixVariant, |
428 | servLen); |
429 | if(connectStatus >= 0) { |
430 | return resultSock; |
431 | } else { |
432 | /* |
433 | * Most likely (errno == ENOENT || errno == ECONNREFUSED) |
434 | * and no FCGI application server is running. |
435 | */ |
436 | close(resultSock); |
437 | return -1; |
438 | } |
439 | } |
aadcc3c8 |
440 | |
0198fd3c |
441 | /* |
442 | *-------------------------------------------------------------- |
443 | * |
444 | * OS_Read -- |
445 | * |
446 | * Pass through to the unix read function. |
447 | * |
448 | * Results: |
449 | * Returns number of byes read, 0, or -1 failure: errno |
450 | * contains actual error. |
451 | * |
452 | * Side effects: |
453 | * None. |
454 | * |
455 | *-------------------------------------------------------------- |
456 | */ |
457 | int OS_Read(int fd, char * buf, size_t len) |
458 | { |
d0686b0d |
459 | if (shutdownNow) return -1; |
0198fd3c |
460 | return(read(fd, buf, len)); |
461 | } |
62e100c7 |
462 | |
0198fd3c |
463 | /* |
464 | *-------------------------------------------------------------- |
465 | * |
466 | * OS_Write -- |
467 | * |
468 | * Pass through to unix write function. |
469 | * |
470 | * Results: |
471 | * Returns number of byes read, 0, or -1 failure: errno |
472 | * contains actual error. |
473 | * |
474 | * Side effects: |
475 | * none. |
476 | * |
477 | *-------------------------------------------------------------- |
478 | */ |
479 | int OS_Write(int fd, char * buf, size_t len) |
480 | { |
d0686b0d |
481 | if (shutdownNow) return -1; |
0198fd3c |
482 | return(write(fd, buf, len)); |
483 | } |
484 | |
0198fd3c |
485 | /* |
486 | *---------------------------------------------------------------------- |
487 | * |
488 | * OS_SpawnChild -- |
489 | * |
490 | * Spawns a new FastCGI listener process. |
491 | * |
492 | * Results: |
493 | * 0 if success, -1 if error. |
494 | * |
495 | * Side effects: |
496 | * Child process spawned. |
497 | * |
498 | *---------------------------------------------------------------------- |
499 | */ |
500 | int OS_SpawnChild(char *appPath, int listenFd) |
501 | { |
502 | int forkResult; |
503 | |
504 | forkResult = fork(); |
505 | if(forkResult < 0) { |
506 | exit(errno); |
507 | } |
508 | |
509 | if(forkResult == 0) { |
510 | /* |
511 | * Close STDIN unconditionally. It's used by the parent |
512 | * process for CGI communication. The FastCGI applciation |
513 | * will be replacing this with the FastCGI listenFd IF |
514 | * STDIN_FILENO is the same as FCGI_LISTENSOCK_FILENO |
515 | * (which it is on Unix). Regardless, STDIN, STDOUT, and |
516 | * STDERR will be closed as the FastCGI process uses a |
517 | * multiplexed socket in their place. |
518 | */ |
519 | close(STDIN_FILENO); |
520 | |
521 | /* |
522 | * If the listenFd is already the value of FCGI_LISTENSOCK_FILENO |
523 | * we're set. If not, change it so the child knows where to |
524 | * get the listen socket from. |
525 | */ |
526 | if(listenFd != FCGI_LISTENSOCK_FILENO) { |
527 | dup2(listenFd, FCGI_LISTENSOCK_FILENO); |
528 | close(listenFd); |
529 | } |
530 | |
531 | close(STDOUT_FILENO); |
532 | close(STDERR_FILENO); |
533 | |
534 | /* |
535 | * We're a child. Exec the application. |
536 | * |
537 | * XXX: entire environment passes through |
538 | */ |
539 | execl(appPath, appPath, NULL); |
540 | /* |
541 | * XXX: Can't do this as we've already closed STDERR!!! |
542 | * |
543 | * perror("exec"); |
544 | */ |
545 | exit(errno); |
546 | } |
547 | return 0; |
548 | } |
549 | |
0198fd3c |
550 | /* |
551 | *-------------------------------------------------------------- |
552 | * |
553 | * OS_AsyncReadStdin -- |
554 | * |
555 | * This initiates an asynchronous read on the standard |
556 | * input handle. |
557 | * |
558 | * The abstraction is necessary because Windows NT does not |
559 | * have a clean way of "select"ing a file descriptor for |
560 | * I/O. |
561 | * |
562 | * Results: |
563 | * -1 if error, 0 otherwise. |
564 | * |
565 | * Side effects: |
566 | * Asynchronous bit is set in the readfd variable and |
567 | * request is enqueued. |
568 | * |
569 | *-------------------------------------------------------------- |
570 | */ |
aadcc3c8 |
571 | int OS_AsyncReadStdin(void *buf, int len, OS_AsyncProc procPtr, |
0198fd3c |
572 | ClientData clientData) |
573 | { |
574 | int index = AIO_RD_IX(STDIN_FILENO); |
575 | |
2b391aca |
576 | asyncIoInUse = TRUE; |
0198fd3c |
577 | ASSERT(asyncIoTable[index].inUse == 0); |
578 | asyncIoTable[index].procPtr = procPtr; |
579 | asyncIoTable[index].clientData = clientData; |
580 | asyncIoTable[index].fd = STDIN_FILENO; |
581 | asyncIoTable[index].len = len; |
582 | asyncIoTable[index].offset = 0; |
583 | asyncIoTable[index].buf = buf; |
584 | asyncIoTable[index].inUse = 1; |
585 | FD_SET(STDIN_FILENO, &readFdSet); |
586 | if(STDIN_FILENO > maxFd) |
587 | maxFd = STDIN_FILENO; |
588 | return 0; |
589 | } |
590 | |
591 | static void GrowAsyncTable(void) |
592 | { |
593 | int oldTableSize = asyncIoTableSize; |
aadcc3c8 |
594 | |
0198fd3c |
595 | asyncIoTableSize = asyncIoTableSize * 2; |
aadcc3c8 |
596 | asyncIoTable = (AioInfo *)realloc(asyncIoTable, asyncIoTableSize * sizeof(AioInfo)); |
0198fd3c |
597 | if(asyncIoTable == NULL) { |
598 | errno = ENOMEM; |
599 | exit(errno); |
600 | } |
601 | memset((char *) &asyncIoTable[oldTableSize], 0, |
602 | oldTableSize * sizeof(AioInfo)); |
603 | |
604 | } |
605 | |
0198fd3c |
606 | /* |
607 | *-------------------------------------------------------------- |
608 | * |
609 | * OS_AsyncRead -- |
610 | * |
611 | * This initiates an asynchronous read on the file |
612 | * handle which may be a socket or named pipe. |
613 | * |
614 | * We also must save the ProcPtr and ClientData, so later |
615 | * when the io completes, we know who to call. |
616 | * |
617 | * We don't look at any results here (the ReadFile may |
618 | * return data if it is cached) but do all completion |
619 | * processing in OS_Select when we get the io completion |
620 | * port done notifications. Then we call the callback. |
621 | * |
622 | * Results: |
623 | * -1 if error, 0 otherwise. |
624 | * |
625 | * Side effects: |
626 | * Asynchronous I/O operation is queued for completion. |
627 | * |
628 | *-------------------------------------------------------------- |
629 | */ |
630 | int OS_AsyncRead(int fd, int offset, void *buf, int len, |
631 | OS_AsyncProc procPtr, ClientData clientData) |
632 | { |
633 | int index = AIO_RD_IX(fd); |
aadcc3c8 |
634 | |
0198fd3c |
635 | ASSERT(asyncIoTable != NULL); |
2b391aca |
636 | asyncIoInUse = TRUE; |
0198fd3c |
637 | |
638 | if(fd > maxFd) |
639 | maxFd = fd; |
640 | |
a34d549f |
641 | while (index >= asyncIoTableSize) { |
0198fd3c |
642 | GrowAsyncTable(); |
643 | } |
644 | |
645 | ASSERT(asyncIoTable[index].inUse == 0); |
646 | asyncIoTable[index].procPtr = procPtr; |
647 | asyncIoTable[index].clientData = clientData; |
648 | asyncIoTable[index].fd = fd; |
649 | asyncIoTable[index].len = len; |
650 | asyncIoTable[index].offset = offset; |
651 | asyncIoTable[index].buf = buf; |
652 | asyncIoTable[index].inUse = 1; |
653 | FD_SET(fd, &readFdSet); |
654 | return 0; |
655 | } |
62e100c7 |
656 | |
0198fd3c |
657 | /* |
658 | *-------------------------------------------------------------- |
659 | * |
660 | * OS_AsyncWrite -- |
661 | * |
662 | * This initiates an asynchronous write on the "fake" file |
663 | * descriptor (which may be a file, socket, or named pipe). |
664 | * We also must save the ProcPtr and ClientData, so later |
665 | * when the io completes, we know who to call. |
666 | * |
667 | * We don't look at any results here (the WriteFile generally |
668 | * completes immediately) but do all completion processing |
669 | * in OS_DoIo when we get the io completion port done |
670 | * notifications. Then we call the callback. |
671 | * |
672 | * Results: |
673 | * -1 if error, 0 otherwise. |
674 | * |
675 | * Side effects: |
676 | * Asynchronous I/O operation is queued for completion. |
677 | * |
678 | *-------------------------------------------------------------- |
679 | */ |
aadcc3c8 |
680 | int OS_AsyncWrite(int fd, int offset, void *buf, int len, |
0198fd3c |
681 | OS_AsyncProc procPtr, ClientData clientData) |
682 | { |
683 | int index = AIO_WR_IX(fd); |
684 | |
2b391aca |
685 | asyncIoInUse = TRUE; |
686 | |
0198fd3c |
687 | if(fd > maxFd) |
688 | maxFd = fd; |
689 | |
a34d549f |
690 | while (index >= asyncIoTableSize) { |
0198fd3c |
691 | GrowAsyncTable(); |
692 | } |
693 | |
694 | ASSERT(asyncIoTable[index].inUse == 0); |
695 | asyncIoTable[index].procPtr = procPtr; |
696 | asyncIoTable[index].clientData = clientData; |
697 | asyncIoTable[index].fd = fd; |
698 | asyncIoTable[index].len = len; |
699 | asyncIoTable[index].offset = offset; |
700 | asyncIoTable[index].buf = buf; |
701 | asyncIoTable[index].inUse = 1; |
702 | FD_SET(fd, &writeFdSet); |
703 | return 0; |
704 | } |
62e100c7 |
705 | |
0198fd3c |
706 | /* |
707 | *-------------------------------------------------------------- |
708 | * |
709 | * OS_Close -- |
710 | * |
711 | * Closes the descriptor. This is a pass through to the |
712 | * Unix close. |
713 | * |
714 | * Results: |
715 | * 0 for success, -1 on failure |
716 | * |
717 | * Side effects: |
718 | * None. |
719 | * |
720 | *-------------------------------------------------------------- |
721 | */ |
2a7273a1 |
722 | int OS_Close(int fd, int shutdown_ok) |
0198fd3c |
723 | { |
8462b1ec |
724 | if (fd == -1) |
725 | return 0; |
726 | |
c92b39ad |
727 | if (asyncIoInUse) { |
2b391aca |
728 | int index = AIO_RD_IX(fd); |
aadcc3c8 |
729 | |
2b391aca |
730 | FD_CLR(fd, &readFdSet); |
731 | FD_CLR(fd, &readFdSetPost); |
732 | if (asyncIoTable[index].inUse != 0) { |
733 | asyncIoTable[index].inUse = 0; |
734 | } |
735 | |
736 | FD_CLR(fd, &writeFdSet); |
737 | FD_CLR(fd, &writeFdSetPost); |
738 | index = AIO_WR_IX(fd); |
739 | if (asyncIoTable[index].inUse != 0) { |
740 | asyncIoTable[index].inUse = 0; |
741 | } |
aadcc3c8 |
742 | |
2b391aca |
743 | if (maxFd == fd) { |
744 | maxFd--; |
745 | } |
0198fd3c |
746 | } |
69d80725 |
747 | |
748 | /* |
749 | * shutdown() the send side and then read() from client until EOF |
750 | * or a timeout expires. This is done to minimize the potential |
751 | * that a TCP RST will be sent by our TCP stack in response to |
752 | * receipt of additional data from the client. The RST would |
753 | * cause the client to discard potentially useful response data. |
754 | */ |
755 | |
2a7273a1 |
756 | if (shutdown_ok) |
69d80725 |
757 | { |
2a7273a1 |
758 | if (shutdown(fd, 1) == 0) |
69d80725 |
759 | { |
2a7273a1 |
760 | struct timeval tv; |
761 | fd_set rfds; |
762 | int rv; |
763 | char trash[1024]; |
764 | |
765 | FD_ZERO(&rfds); |
766 | |
767 | do |
768 | { |
769 | FD_SET(fd, &rfds); |
770 | tv.tv_sec = 2; |
771 | tv.tv_usec = 0; |
772 | rv = select(fd + 1, &rfds, NULL, NULL, &tv); |
773 | } |
774 | while (rv > 0 && read(fd, trash, sizeof(trash)) > 0); |
69d80725 |
775 | } |
69d80725 |
776 | } |
777 | |
0198fd3c |
778 | return close(fd); |
779 | } |
62e100c7 |
780 | |
0198fd3c |
781 | /* |
782 | *-------------------------------------------------------------- |
783 | * |
784 | * OS_CloseRead -- |
785 | * |
786 | * Cancel outstanding asynchronous reads and prevent subsequent |
787 | * reads from completing. |
788 | * |
789 | * Results: |
790 | * Socket or file is shutdown. Return values mimic Unix shutdown: |
791 | * 0 success, -1 failure |
792 | * |
793 | *-------------------------------------------------------------- |
794 | */ |
795 | int OS_CloseRead(int fd) |
796 | { |
797 | if(asyncIoTable[AIO_RD_IX(fd)].inUse != 0) { |
798 | asyncIoTable[AIO_RD_IX(fd)].inUse = 0; |
799 | FD_CLR(fd, &readFdSet); |
800 | } |
aadcc3c8 |
801 | |
0198fd3c |
802 | return shutdown(fd, 0); |
803 | } |
804 | |
0198fd3c |
805 | /* |
806 | *-------------------------------------------------------------- |
807 | * |
808 | * OS_DoIo -- |
809 | * |
810 | * This function was formerly OS_Select. It's purpose is |
811 | * to pull I/O completion events off the queue and dispatch |
812 | * them to the appropriate place. |
813 | * |
814 | * Results: |
815 | * Returns 0. |
816 | * |
817 | * Side effects: |
818 | * Handlers are called. |
819 | * |
820 | *-------------------------------------------------------------- |
821 | */ |
822 | int OS_DoIo(struct timeval *tmo) |
823 | { |
824 | int fd, len, selectStatus; |
825 | OS_AsyncProc procPtr; |
826 | ClientData clientData; |
827 | AioInfo *aioPtr; |
828 | fd_set readFdSetCpy; |
829 | fd_set writeFdSetCpy; |
830 | |
2b391aca |
831 | asyncIoInUse = TRUE; |
0198fd3c |
832 | FD_ZERO(&readFdSetCpy); |
833 | FD_ZERO(&writeFdSetCpy); |
834 | |
835 | for(fd = 0; fd <= maxFd; fd++) { |
836 | if(FD_ISSET(fd, &readFdSet)) { |
837 | FD_SET(fd, &readFdSetCpy); |
838 | } |
839 | if(FD_ISSET(fd, &writeFdSet)) { |
840 | FD_SET(fd, &writeFdSetCpy); |
841 | } |
842 | } |
aadcc3c8 |
843 | |
0198fd3c |
844 | /* |
845 | * If there were no completed events from a prior call, see if there's |
846 | * any work to do. |
847 | */ |
848 | if(numRdPosted == 0 && numWrPosted == 0) { |
849 | selectStatus = select((maxFd+1), &readFdSetCpy, &writeFdSetCpy, |
850 | NULL, tmo); |
851 | if(selectStatus < 0) { |
852 | exit(errno); |
853 | } |
854 | |
855 | for(fd = 0; fd <= maxFd; fd++) { |
856 | /* |
857 | * Build up a list of completed events. We'll work off of |
858 | * this list as opposed to looping through the read and write |
859 | * fd sets since they can be affected by a callbacl routine. |
860 | */ |
861 | if(FD_ISSET(fd, &readFdSetCpy)) { |
862 | numRdPosted++; |
863 | FD_SET(fd, &readFdSetPost); |
864 | FD_CLR(fd, &readFdSet); |
865 | } |
866 | |
867 | if(FD_ISSET(fd, &writeFdSetCpy)) { |
868 | numWrPosted++; |
869 | FD_SET(fd, &writeFdSetPost); |
870 | FD_CLR(fd, &writeFdSet); |
871 | } |
872 | } |
873 | } |
874 | |
875 | if(numRdPosted == 0 && numWrPosted == 0) |
876 | return 0; |
aadcc3c8 |
877 | |
0198fd3c |
878 | for(fd = 0; fd <= maxFd; fd++) { |
879 | /* |
880 | * Do reads and dispatch callback. |
881 | */ |
aadcc3c8 |
882 | if(FD_ISSET(fd, &readFdSetPost) |
0198fd3c |
883 | && asyncIoTable[AIO_RD_IX(fd)].inUse) { |
884 | |
885 | numRdPosted--; |
886 | FD_CLR(fd, &readFdSetPost); |
887 | aioPtr = &asyncIoTable[AIO_RD_IX(fd)]; |
aadcc3c8 |
888 | |
0198fd3c |
889 | len = read(aioPtr->fd, aioPtr->buf, aioPtr->len); |
890 | |
891 | procPtr = aioPtr->procPtr; |
892 | aioPtr->procPtr = NULL; |
893 | clientData = aioPtr->clientData; |
894 | aioPtr->inUse = 0; |
895 | |
896 | (*procPtr)(clientData, len); |
897 | } |
898 | |
899 | /* |
900 | * Do writes and dispatch callback. |
901 | */ |
902 | if(FD_ISSET(fd, &writeFdSetPost) && |
903 | asyncIoTable[AIO_WR_IX(fd)].inUse) { |
904 | |
905 | numWrPosted--; |
906 | FD_CLR(fd, &writeFdSetPost); |
907 | aioPtr = &asyncIoTable[AIO_WR_IX(fd)]; |
aadcc3c8 |
908 | |
0198fd3c |
909 | len = write(aioPtr->fd, aioPtr->buf, aioPtr->len); |
910 | |
911 | procPtr = aioPtr->procPtr; |
912 | aioPtr->procPtr = NULL; |
913 | clientData = aioPtr->clientData; |
914 | aioPtr->inUse = 0; |
915 | (*procPtr)(clientData, len); |
916 | } |
917 | } |
918 | return 0; |
919 | } |
920 | |
226e4c76 |
921 | /* |
922 | * Not all systems have strdup(). |
923 | * @@@ autoconf should determine whether or not this is needed, but for now.. |
924 | */ |
37605d3c |
925 | static char * str_dup(const char * str) |
226e4c76 |
926 | { |
927 | char * sdup = (char *) malloc(strlen(str) + 1); |
928 | |
929 | if (sdup) |
930 | strcpy(sdup, str); |
931 | |
932 | return sdup; |
933 | } |
934 | |
0198fd3c |
935 | /* |
936 | *---------------------------------------------------------------------- |
937 | * |
938 | * ClientAddrOK -- |
939 | * |
940 | * Checks if a client address is in a list of allowed addresses |
941 | * |
942 | * Results: |
943 | * TRUE if address list is empty or client address is present |
944 | * in the list, FALSE otherwise. |
945 | * |
946 | *---------------------------------------------------------------------- |
947 | */ |
0b7c9662 |
948 | static int ClientAddrOK(struct sockaddr_in *saPtr, const char *clientList) |
0198fd3c |
949 | { |
950 | int result = FALSE; |
951 | char *clientListCopy, *cur, *next; |
0198fd3c |
952 | |
226e4c76 |
953 | if (clientList == NULL || *clientList == '\0') { |
0198fd3c |
954 | return TRUE; |
955 | } |
956 | |
226e4c76 |
957 | clientListCopy = str_dup(clientList); |
aadcc3c8 |
958 | |
226e4c76 |
959 | for (cur = clientListCopy; cur != NULL; cur = next) { |
0198fd3c |
960 | next = strchr(cur, ','); |
226e4c76 |
961 | if (next != NULL) { |
0198fd3c |
962 | *next++ = '\0'; |
226e4c76 |
963 | } |
964 | if (inet_addr(cur) == saPtr->sin_addr.s_addr) { |
0198fd3c |
965 | result = TRUE; |
966 | break; |
967 | } |
968 | } |
226e4c76 |
969 | |
0198fd3c |
970 | free(clientListCopy); |
971 | return result; |
972 | } |
973 | |
0198fd3c |
974 | /* |
975 | *---------------------------------------------------------------------- |
976 | * |
977 | * AcquireLock -- |
978 | * |
979 | * On platforms that implement concurrent calls to accept |
980 | * on a shared listening ipcFd, returns 0. On other platforms, |
981 | * acquires an exclusive lock across all processes sharing a |
982 | * listening ipcFd, blocking until the lock has been acquired. |
983 | * |
984 | * Results: |
985 | * 0 for successful call, -1 in case of system error (fatal). |
986 | * |
987 | * Side effects: |
988 | * This process now has the exclusive lock. |
989 | * |
990 | *---------------------------------------------------------------------- |
991 | */ |
0b7c9662 |
992 | static int AcquireLock(int sock, int fail_on_intr) |
0198fd3c |
993 | { |
994 | #ifdef USE_LOCKING |
0b7c9662 |
995 | do { |
996 | struct flock lock; |
997 | lock.l_type = F_WRLCK; |
998 | lock.l_start = 0; |
999 | lock.l_whence = SEEK_SET; |
1000 | lock.l_len = 0; |
1001 | |
1002 | if (fcntl(sock, F_SETLKW, &lock) != -1) |
1003 | return 0; |
98aeb41b |
1004 | } while (errno == EINTR |
1005 | && ! fail_on_intr |
1006 | && ! shutdownPending); |
0b7c9662 |
1007 | |
1008 | return -1; |
1009 | |
1010 | #else |
0198fd3c |
1011 | return 0; |
0b7c9662 |
1012 | #endif |
0198fd3c |
1013 | } |
62e100c7 |
1014 | |
0198fd3c |
1015 | /* |
1016 | *---------------------------------------------------------------------- |
1017 | * |
1018 | * ReleaseLock -- |
1019 | * |
1020 | * On platforms that implement concurrent calls to accept |
1021 | * on a shared listening ipcFd, does nothing. On other platforms, |
1022 | * releases an exclusive lock acquired by AcquireLock. |
1023 | * |
1024 | * Results: |
1025 | * 0 for successful call, -1 in case of system error (fatal). |
1026 | * |
1027 | * Side effects: |
1028 | * This process no longer holds the lock. |
1029 | * |
1030 | *---------------------------------------------------------------------- |
1031 | */ |
0b7c9662 |
1032 | static int ReleaseLock(int sock) |
0198fd3c |
1033 | { |
1034 | #ifdef USE_LOCKING |
0b7c9662 |
1035 | do { |
1036 | struct flock lock; |
1037 | lock.l_type = F_UNLCK; |
1038 | lock.l_start = 0; |
1039 | lock.l_whence = SEEK_SET; |
1040 | lock.l_len = 0; |
1041 | |
1042 | if (fcntl(sock, F_SETLK, &lock) != -1) |
1043 | return 0; |
1044 | } while (errno == EINTR); |
0198fd3c |
1045 | |
0b7c9662 |
1046 | return -1; |
1047 | |
1048 | #else |
0198fd3c |
1049 | return 0; |
0b7c9662 |
1050 | #endif |
0198fd3c |
1051 | } |
1052 | |
69f62c0e |
1053 | /********************************************************************** |
aadcc3c8 |
1054 | * Determine if the errno resulting from a failed accept() warrants a |
69f62c0e |
1055 | * retry or exit(). Based on Apache's http_main.c accept() handling |
1056 | * and Stevens' Unix Network Programming Vol 1, 2nd Ed, para. 15.6. |
1057 | */ |
1058 | static int is_reasonable_accept_errno (const int error) |
1059 | { |
1060 | switch (error) { |
1061 | #ifdef EPROTO |
aadcc3c8 |
1062 | /* EPROTO on certain older kernels really means ECONNABORTED, so |
1063 | * we need to ignore it for them. See discussion in new-httpd |
1064 | * archives nh.9701 search for EPROTO. Also see nh.9603, search |
1065 | * for EPROTO: There is potentially a bug in Solaris 2.x x<6, and |
1066 | * other boxes that implement tcp sockets in userland (i.e. on top of |
1067 | * STREAMS). On these systems, EPROTO can actually result in a fatal |
1068 | * loop. See PR#981 for example. It's hard to handle both uses of |
69f62c0e |
1069 | * EPROTO. */ |
1070 | case EPROTO: |
1071 | #endif |
1072 | #ifdef ECONNABORTED |
1073 | case ECONNABORTED: |
1074 | #endif |
1075 | /* Linux generates the rest of these, other tcp stacks (i.e. |
1076 | * bsd) tend to hide them behind getsockopt() interfaces. They |
1077 | * occur when the net goes sour or the client disconnects after the |
1078 | * three-way handshake has been done in the kernel but before |
1079 | * userland has picked up the socket. */ |
1080 | #ifdef ECONNRESET |
1081 | case ECONNRESET: |
1082 | #endif |
1083 | #ifdef ETIMEDOUT |
1084 | case ETIMEDOUT: |
1085 | #endif |
1086 | #ifdef EHOSTUNREACH |
1087 | case EHOSTUNREACH: |
1088 | #endif |
1089 | #ifdef ENETUNREACH |
1090 | case ENETUNREACH: |
1091 | #endif |
1092 | return 1; |
1093 | |
1094 | default: |
1095 | return 0; |
1096 | } |
1097 | } |
1098 | |
1099 | /********************************************************************** |
aadcc3c8 |
1100 | * This works around a problem on Linux 2.0.x and SCO Unixware (maybe |
1101 | * others?). When a connect() is made to a Unix Domain socket, but its |
1102 | * not accept()ed before the web server gets impatient and close()s, an |
1103 | * accept() results in a valid file descriptor, but no data to read. |
1104 | * This causes a block on the first read() - which never returns! |
1105 | * |
1106 | * Another approach to this is to write() to the socket to provoke a |
1107 | * SIGPIPE, but this is a pain because of the FastCGI protocol, the fact |
1108 | * that whatever is written has to be universally ignored by all FastCGI |
1109 | * web servers, and a SIGPIPE handler has to be installed which returns |
1110 | * (or SIGPIPE is ignored). |
1111 | * |
1112 | * READABLE_UNIX_FD_DROP_DEAD_TIMEVAL = 2,0 by default. |
1113 | * |
1114 | * Making it shorter is probably safe, but I'll leave that to you. Making |
1115 | * it 0,0 doesn't work reliably. The shorter you can reliably make it, |
1116 | * the faster your application will be able to recover (waiting 2 seconds |
1117 | * may _cause_ the problem when there is a very high demand). At any rate, |
1118 | * this is better than perma-blocking. |
1119 | */ |
69f62c0e |
1120 | static int is_af_unix_keeper(const int fd) |
1121 | { |
1122 | struct timeval tval = { READABLE_UNIX_FD_DROP_DEAD_TIMEVAL }; |
1123 | fd_set read_fds; |
1124 | |
1125 | FD_ZERO(&read_fds); |
1126 | FD_SET(fd, &read_fds); |
aadcc3c8 |
1127 | |
69f62c0e |
1128 | return select(fd + 1, &read_fds, NULL, NULL, &tval) >= 0 && FD_ISSET(fd, &read_fds); |
1129 | } |
1130 | |
0198fd3c |
1131 | /* |
1132 | *---------------------------------------------------------------------- |
1133 | * |
0b7c9662 |
1134 | * OS_Accept -- |
0198fd3c |
1135 | * |
1136 | * Accepts a new FastCGI connection. This routine knows whether |
1137 | * we're dealing with TCP based sockets or NT Named Pipes for IPC. |
1138 | * |
1139 | * Results: |
1140 | * -1 if the operation fails, otherwise this is a valid IPC fd. |
1141 | * |
1142 | * Side effects: |
1143 | * New IPC connection is accepted. |
1144 | * |
1145 | *---------------------------------------------------------------------- |
1146 | */ |
1dd5d7a8 |
1147 | int OS_Accept(int listen_sock, int fail_on_intr, const char *webServerAddrs) |
0198fd3c |
1148 | { |
d0686b0d |
1149 | int socket = -1; |
69f62c0e |
1150 | union { |
0198fd3c |
1151 | struct sockaddr_un un; |
a3c43615 |
1152 | struct sockaddr_in in; |
0198fd3c |
1153 | } sa; |
ed728efb |
1154 | |
0b7c9662 |
1155 | for (;;) { |
1156 | if (AcquireLock(listen_sock, fail_on_intr)) |
1157 | return -1; |
a3c43615 |
1158 | |
0b7c9662 |
1159 | for (;;) { |
69f62c0e |
1160 | do { |
0b7c9662 |
1161 | #ifdef HAVE_SOCKLEN |
1162 | socklen_t len = sizeof(sa); |
1163 | #else |
1164 | int len = sizeof(sa); |
1165 | #endif |
d0686b0d |
1166 | if (shutdownPending) break; |
1167 | /* There's a window here */ |
1168 | |
0b7c9662 |
1169 | socket = accept(listen_sock, (struct sockaddr *)&sa, &len); |
d0686b0d |
1170 | } while (socket < 0 |
1171 | && errno == EINTR |
98aeb41b |
1172 | && ! fail_on_intr |
1173 | && ! shutdownPending); |
a3c43615 |
1174 | |
69f62c0e |
1175 | if (socket < 0) { |
994e1bb8 |
1176 | if (shutdownPending || ! is_reasonable_accept_errno(errno)) { |
a3c43615 |
1177 | int errnoSave = errno; |
d0686b0d |
1178 | |
0b7c9662 |
1179 | ReleaseLock(listen_sock); |
d0686b0d |
1180 | |
994e1bb8 |
1181 | if (! shutdownPending) { |
d0686b0d |
1182 | errno = errnoSave; |
1183 | } |
1184 | |
69f62c0e |
1185 | return (-1); |
a3c43615 |
1186 | } |
69f62c0e |
1187 | errno = 0; |
1188 | } |
0b7c9662 |
1189 | else { /* socket >= 0 */ |
69f62c0e |
1190 | int set = 1; |
aadcc3c8 |
1191 | |
69f62c0e |
1192 | if (sa.in.sin_family != AF_INET) |
1193 | break; |
aadcc3c8 |
1194 | |
69f62c0e |
1195 | #ifdef TCP_NODELAY |
1196 | /* No replies to outgoing data, so disable Nagle */ |
1197 | setsockopt(socket, IPPROTO_TCP, TCP_NODELAY, (char *)&set, sizeof(set)); |
aadcc3c8 |
1198 | #endif |
1199 | |
69f62c0e |
1200 | /* Check that the client IP address is approved */ |
1dd5d7a8 |
1201 | if (ClientAddrOK(&sa.in, webServerAddrs)) |
69f62c0e |
1202 | break; |
aadcc3c8 |
1203 | |
69f62c0e |
1204 | close(socket); |
0b7c9662 |
1205 | } /* socket >= 0 */ |
1206 | } /* for(;;) */ |
aadcc3c8 |
1207 | |
0b7c9662 |
1208 | if (ReleaseLock(listen_sock)) |
69f62c0e |
1209 | return (-1); |
aadcc3c8 |
1210 | |
69f62c0e |
1211 | if (sa.in.sin_family != AF_UNIX || is_af_unix_keeper(socket)) |
1212 | break; |
aadcc3c8 |
1213 | |
69f62c0e |
1214 | close(socket); |
1215 | } /* while(1) - lock */ |
a3c43615 |
1216 | |
a3c43615 |
1217 | return (socket); |
0198fd3c |
1218 | } |
62e100c7 |
1219 | |
0198fd3c |
1220 | /* |
1221 | *---------------------------------------------------------------------- |
1222 | * |
1223 | * OS_IpcClose |
1224 | * |
1225 | * OS IPC routine to close an IPC connection. |
1226 | * |
1227 | * Results: |
1228 | * |
1229 | * |
1230 | * Side effects: |
1231 | * IPC connection is closed. |
1232 | * |
1233 | *---------------------------------------------------------------------- |
1234 | */ |
2a7273a1 |
1235 | int OS_IpcClose(int ipcFd, int shutdown) |
0198fd3c |
1236 | { |
2a7273a1 |
1237 | return OS_Close(ipcFd, shutdown); |
0198fd3c |
1238 | } |
1239 | |
0198fd3c |
1240 | /* |
1241 | *---------------------------------------------------------------------- |
1242 | * |
1243 | * OS_IsFcgi -- |
1244 | * |
1245 | * Determines whether this process is a FastCGI process or not. |
1246 | * |
1247 | * Results: |
1248 | * Returns 1 if FastCGI, 0 if not. |
1249 | * |
1250 | * Side effects: |
1251 | * None. |
1252 | * |
1253 | *---------------------------------------------------------------------- |
1254 | */ |
0b7c9662 |
1255 | int OS_IsFcgi(int sock) |
0198fd3c |
1256 | { |
b22c3782 |
1257 | union { |
1258 | struct sockaddr_in in; |
1259 | struct sockaddr_un un; |
1260 | } sa; |
8eac3e1b |
1261 | #ifdef HAVE_SOCKLEN |
ed728efb |
1262 | socklen_t len = sizeof(sa); |
1263 | #else |
b22c3782 |
1264 | int len = sizeof(sa); |
ed728efb |
1265 | #endif |
0198fd3c |
1266 | |
f43b4006 |
1267 | errno = 0; |
36c03862 |
1268 | |
0b7c9662 |
1269 | if (getpeername(sock, (struct sockaddr *)&sa, &len) != 0 && errno == ENOTCONN) { |
1270 | return TRUE; |
1271 | } |
1272 | else { |
1273 | return FALSE; |
1274 | } |
0198fd3c |
1275 | } |
62e100c7 |
1276 | |
0198fd3c |
1277 | /* |
1278 | *---------------------------------------------------------------------- |
1279 | * |
1280 | * OS_SetFlags -- |
1281 | * |
1282 | * Sets selected flag bits in an open file descriptor. |
1283 | * |
1284 | *---------------------------------------------------------------------- |
1285 | */ |
1286 | void OS_SetFlags(int fd, int flags) |
1287 | { |
1288 | int val; |
1289 | if((val = fcntl(fd, F_GETFL, 0)) < 0) { |
1290 | exit(errno); |
1291 | } |
1292 | val |= flags; |
1293 | if(fcntl(fd, F_SETFL, val) < 0) { |
1294 | exit(errno); |
1295 | } |
1296 | } |