4 * Citadel "system dependent" stuff.
5 * See copyright.txt for copyright information.
7 * Here's where we (hopefully) have most parts of the Citadel server that
8 * would need to be altered to run the server in a non-POSIX environment.
10 * If we ever port to a different platform and either have multiple
11 * variants of this file or simply load it up with #ifdefs.
22 #include <sys/types.h>
25 #include <sys/socket.h>
26 #include <sys/syslog.h>
28 #if TIME_WITH_SYS_TIME
29 # include <sys/time.h>
33 # include <sys/time.h>
40 #include <sys/resource.h>
41 #include <netinet/in.h>
42 #include <netinet/tcp.h>
43 #include <arpa/inet.h>
56 #include "serv_extensions.h"
57 #include "sysdep_decls.h"
58 #include "citserver.h"
62 #include "housekeeping.h"
64 #include "serv_crypto.h"
65 #include "serv_fulltext.h"
67 #ifdef HAVE_SYS_SELECT_H
68 #include <sys/select.h>
76 #ifdef DEBUG_MEMORY_LEAKS
84 struct igheap *igheap = NULL;
88 pthread_mutex_t Critters[MAX_SEMAPHORES]; /* Things needing locking */
89 pthread_key_t MyConKey; /* TSD key for MyContext() */
91 int verbosity = DEFAULT_VERBOSITY; /* Logging level */
93 struct CitContext masterCC;
94 time_t last_purge = 0; /* Last dead session purge */
95 static int num_threads = 0; /* Current number of threads */
96 int num_sessions = 0; /* Current number of sessions */
97 pthread_t indexer_thread_tid;
98 pthread_t checkpoint_thread_tid;
100 int syslog_facility = LOG_DAEMON;
101 int enable_syslog = 0;
102 extern int running_as_daemon;
105 * lprintf() ... Write logging information
107 void lprintf(enum LogLevel loglevel, const char *format, ...) {
111 va_start(arg_ptr, format);
112 vsyslog((syslog_facility | loglevel), format, arg_ptr);
116 /* stderr output code */
117 if (enable_syslog || running_as_daemon) return;
119 /* if we run in forground and syslog is disabled, log to terminal */
120 if (loglevel <= verbosity) {
125 gettimeofday(&tv, NULL);
126 /* Promote to time_t; types differ on some OSes (like darwin) */
127 unixtime = tv.tv_sec;
128 localtime_r(&unixtime, &tim);
129 if (CC->cs_pid != 0) {
131 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
132 tim.tm_year + 1900, tim.tm_mon + 1,
133 tim.tm_mday, tim.tm_hour, tim.tm_min,
134 tim.tm_sec, (long)tv.tv_usec,
138 "%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
139 tim.tm_year + 1900, tim.tm_mon + 1,
140 tim.tm_mday, tim.tm_hour, tim.tm_min,
141 tim.tm_sec, (long)tv.tv_usec);
143 va_start(arg_ptr, format);
144 vfprintf(stderr, format, arg_ptr);
153 * Signal handler to shut down the server.
156 volatile int time_to_die = 0;
157 volatile int shutdown_and_halt = 0;
159 static RETSIGTYPE signal_cleanup(int signum) {
160 lprintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
162 master_cleanup(signum);
167 * Some initialization stuff...
169 void init_sysdep(void) {
173 /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
177 getrlimit(RLIMIT_NOFILE, &rl);
178 rl.rlim_cur = FD_SETSIZE;
179 rl.rlim_max = FD_SETSIZE;
180 setrlimit(RLIMIT_NOFILE, &rl);
184 /* If we've got OpenSSL, we're going to use it. */
189 /* Set up a bunch of semaphores to be used for critical sections */
190 for (i=0; i<MAX_SEMAPHORES; ++i) {
191 pthread_mutex_init(&Critters[i], NULL);
195 * Set up a place to put thread-specific data.
196 * We only need a single pointer per thread - it points to the
197 * CitContext structure (in the ContextList linked list) of the
198 * session to which the calling thread is currently bound.
200 if (pthread_key_create(&MyConKey, NULL) != 0) {
201 lprintf(CTDL_CRIT, "Can't create TSD key: %s\n",
206 * The action for unexpected signals and exceptions should be to
207 * call signal_cleanup() to gracefully shut down the server.
210 sigaddset(&set, SIGINT);
211 sigaddset(&set, SIGQUIT);
212 sigaddset(&set, SIGHUP);
213 sigaddset(&set, SIGTERM);
214 // sigaddset(&set, SIGSEGV); commented out because
215 // sigaddset(&set, SIGILL); we want core dumps
216 // sigaddset(&set, SIGBUS);
217 sigprocmask(SIG_UNBLOCK, &set, NULL);
219 signal(SIGINT, signal_cleanup);
220 signal(SIGQUIT, signal_cleanup);
221 signal(SIGHUP, signal_cleanup);
222 signal(SIGTERM, signal_cleanup);
223 // signal(SIGSEGV, signal_cleanup); commented out because
224 // signal(SIGILL, signal_cleanup); we want core dumps
225 // signal(SIGBUS, signal_cleanup);
228 * Do not shut down the server on broken pipe signals, otherwise the
229 * whole Citadel service would come down whenever a single client
232 signal(SIGPIPE, SIG_IGN);
237 * Obtain a semaphore lock to begin a critical section.
239 void begin_critical_section(int which_one)
241 /* lprintf(CTDL_DEBUG, "begin_critical_section(%d)\n", which_one); */
243 /* For all types of critical sections except those listed here,
244 * ensure nobody ever tries to do a critical section within a
245 * transaction; this could lead to deadlock.
247 if ( (which_one != S_FLOORCACHE)
248 #ifdef DEBUG_MEMORY_LEAKS
249 && (which_one != S_DEBUGMEMLEAKS)
254 pthread_mutex_lock(&Critters[which_one]);
258 * Release a semaphore lock to end a critical section.
260 void end_critical_section(int which_one)
262 pthread_mutex_unlock(&Critters[which_one]);
268 * This is a generic function to set up a master socket for listening on
269 * a TCP port. The server shuts down if the bind fails.
272 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
274 struct sockaddr_in sin;
276 int actual_queue_len;
278 actual_queue_len = queue_len;
279 if (actual_queue_len < 5) actual_queue_len = 5;
281 memset(&sin, 0, sizeof(sin));
282 sin.sin_family = AF_INET;
283 sin.sin_port = htons((u_short)port_number);
284 if (ip_addr == NULL) {
285 sin.sin_addr.s_addr = INADDR_ANY;
288 sin.sin_addr.s_addr = inet_addr(ip_addr);
291 if (sin.sin_addr.s_addr == INADDR_NONE) {
292 sin.sin_addr.s_addr = INADDR_ANY;
295 s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
298 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
304 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
306 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
307 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
313 /* set to nonblock - we need this for some obscure situations */
314 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
316 "citserver: Can't set socket to non-blocking: %s\n",
322 if (listen(s, actual_queue_len) < 0) {
323 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n",
335 * Create a Unix domain socket and listen on it
337 int ig_uds_server(char *sockpath, int queue_len)
339 struct sockaddr_un addr;
342 int actual_queue_len;
344 actual_queue_len = queue_len;
345 if (actual_queue_len < 5) actual_queue_len = 5;
347 i = unlink(sockpath);
348 if (i != 0) if (errno != ENOENT) {
349 lprintf(CTDL_EMERG, "citserver: can't unlink %s: %s\n",
350 sockpath, strerror(errno));
354 memset(&addr, 0, sizeof(addr));
355 addr.sun_family = AF_UNIX;
356 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
358 s = socket(AF_UNIX, SOCK_STREAM, 0);
360 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
365 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
366 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
371 /* set to nonblock - we need this for some obscure situations */
372 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
374 "citserver: Can't set socket to non-blocking: %s\n",
380 if (listen(s, actual_queue_len) < 0) {
381 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n",
386 chmod(sockpath, 0777);
393 * Return a pointer to the CitContext structure bound to the thread which
394 * called this function. If there's no such binding (for example, if it's
395 * called by the housekeeper thread) then a generic 'master' CC is returned.
397 * This function is used *VERY* frequently and must be kept small.
399 struct CitContext *MyContext(void) {
401 register struct CitContext *c;
403 return ((c = (struct CitContext *) pthread_getspecific(MyConKey),
404 c == NULL) ? &masterCC : c
410 * Initialize a new context and place it in the list. The session number
411 * used to be the PID (which is why it's called cs_pid), but that was when we
412 * had one process per session. Now we just assign them sequentially, starting
413 * at 1 (don't change it to 0 because masterCC uses 0).
415 struct CitContext *CreateNewContext(void) {
416 struct CitContext *me;
417 static int next_pid = 0;
419 me = (struct CitContext *) malloc(sizeof(struct CitContext));
421 lprintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
424 memset(me, 0, sizeof(struct CitContext));
426 /* The new context will be created already in the CON_EXECUTING state
427 * in order to prevent another thread from grabbing it while it's
430 me->state = CON_EXECUTING;
433 * Generate a unique session number and insert this context into
436 begin_critical_section(S_SESSION_TABLE);
437 me->cs_pid = ++next_pid;
439 me->next = ContextList;
441 if (me->next != NULL) {
445 end_critical_section(S_SESSION_TABLE);
451 * The following functions implement output buffering. If the kernel supplies
452 * native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
453 * user-space buffering.
456 # define HAVE_TCP_BUFFERING
459 # define HAVE_TCP_BUFFERING
460 # define TCP_CORK TCP_NOPUSH
465 #ifdef HAVE_TCP_BUFFERING
466 static unsigned on = 1, off = 0;
467 void buffer_output(void) {
468 struct CitContext *ctx = MyContext();
469 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
473 void unbuffer_output(void) {
474 struct CitContext *ctx = MyContext();
475 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
479 void flush_output(void) {
480 struct CitContext *ctx = MyContext();
481 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
482 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
485 void buffer_output(void) {
486 if (CC->buffering == 0) {
489 CC->output_buffer = malloc(SIZ);
493 void flush_output(void) {
494 if (CC->buffering == 1) {
495 client_write(CC->output_buffer, CC->buffer_len);
500 void unbuffer_output(void) {
501 if (CC->buffering == 1) {
503 /* We don't call flush_output because we can't. */
504 client_write(CC->output_buffer, CC->buffer_len);
506 free(CC->output_buffer);
507 CC->output_buffer = NULL;
515 * client_write() ... Send binary data to the client.
517 void client_write(char *buf, int nbytes)
519 int bytes_written = 0;
521 #ifndef HAVE_TCP_BUFFERING
522 int old_buffer_len = 0;
525 if (CC->redirect_buffer != NULL) {
526 if ((CC->redirect_len + nbytes + 2) >= CC->redirect_alloc) {
527 CC->redirect_alloc = (CC->redirect_alloc * 2) + nbytes;
528 CC->redirect_buffer = realloc(CC->redirect_buffer,
531 memcpy(&CC->redirect_buffer[CC->redirect_len], buf, nbytes);
532 CC->redirect_len += nbytes;
533 CC->redirect_buffer[CC->redirect_len] = 0;
537 #ifndef HAVE_TCP_BUFFERING
538 /* If we're buffering for later, do that now. */
540 old_buffer_len = CC->buffer_len;
541 CC->buffer_len += nbytes;
542 CC->output_buffer = realloc(CC->output_buffer, CC->buffer_len);
543 memcpy(&CC->output_buffer[old_buffer_len], buf, nbytes);
548 /* Ok, at this point we're not buffering. Go ahead and write. */
551 if (CC->redirect_ssl) {
552 client_write_ssl(buf, nbytes);
557 while (bytes_written < nbytes) {
558 retval = write(CC->client_socket, &buf[bytes_written],
559 nbytes - bytes_written);
562 "client_write(%d bytes) failed: %s (%d)\n",
563 nbytes - bytes_written,
564 strerror(errno), errno);
568 bytes_written = bytes_written + retval;
574 * cprintf() ... Send formatted printable data to the client. It is
575 * implemented in terms of client_write() but remains in
576 * sysdep.c in case we port to somewhere without va_args...
578 void cprintf(const char *format, ...) {
582 va_start(arg_ptr, format);
583 if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
584 buf[sizeof buf - 2] = '\n';
585 client_write(buf, strlen(buf));
591 * Read data from the client socket.
593 * 1 Requested number of bytes has been read.
594 * 0 Request timed out.
595 * -1 The socket is broken.
596 * If the socket breaks, the session will be terminated.
598 int client_read_to(char *buf, int bytes, int timeout)
606 if (CC->redirect_ssl) {
607 return (client_read_ssl(buf, bytes, timeout));
613 FD_SET(CC->client_socket, &rfds);
617 retval = select( (CC->client_socket)+1,
618 &rfds, NULL, NULL, &tv);
620 if (FD_ISSET(CC->client_socket, &rfds) == 0) {
624 rlen = read(CC->client_socket, &buf[len], bytes-len);
626 /* The socket has been disconnected! */
636 * Read data from the client socket with default timeout.
637 * (This is implemented in terms of client_read_to() and could be
638 * justifiably moved out of sysdep.c)
640 INLINE int client_read(char *buf, int bytes)
642 return(client_read_to(buf, bytes, config.c_sleeping));
647 * client_getln() ... Get a LF-terminated line of text from the client.
648 * (This is implemented in terms of client_read() and could be
649 * justifiably moved out of sysdep.c)
651 int client_getln(char *buf, int bufsize)
655 /* Read one character at a time.
658 retval = client_read(&buf[i], 1);
659 if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
663 /* If we got a long line, discard characters until the newline.
665 if (i == (bufsize-1))
666 while (buf[i] != '\n' && retval == 1)
667 retval = client_read(&buf[i], 1);
669 /* Strip the trailing LF, and the trailing CR if present.
672 while ( (strlen(buf) > 0) && ((buf[strlen(buf)-1]==10) || (buf[strlen(buf)-1] == 13)) ) {
673 buf[strlen(buf)-1] = 0;
675 if (retval < 0) safestrncpy(buf, "000", bufsize);
682 * The system-dependent part of master_cleanup() - close the master socket.
684 void sysdep_master_cleanup(void) {
685 struct ServiceFunctionHook *serviceptr;
688 * close all protocol master sockets
690 for (serviceptr = ServiceHookTable; serviceptr != NULL;
691 serviceptr = serviceptr->next ) {
693 if (serviceptr->tcp_port > 0)
694 lprintf(CTDL_INFO, "Closing listener on port %d\n",
695 serviceptr->tcp_port);
697 if (serviceptr->sockpath != NULL)
698 lprintf(CTDL_INFO, "Closing listener on '%s'\n",
699 serviceptr->sockpath);
701 close(serviceptr->msock);
703 /* If it's a Unix domain socket, remove the file. */
704 if (serviceptr->sockpath != NULL) {
705 unlink(serviceptr->sockpath);
712 * Terminate another session.
713 * (This could justifiably be moved out of sysdep.c because it
714 * no longer does anything that is system-dependent.)
716 void kill_session(int session_to_kill) {
717 struct CitContext *ptr;
719 begin_critical_section(S_SESSION_TABLE);
720 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
721 if (ptr->cs_pid == session_to_kill) {
725 end_critical_section(S_SESSION_TABLE);
732 * Start running as a daemon.
734 void start_daemon(int unused) {
735 close(0); close(1); close(2);
738 signal(SIGHUP,SIG_IGN);
739 signal(SIGINT,SIG_IGN);
740 signal(SIGQUIT,SIG_IGN);
746 * Generic routine to convert a login name to a full name (gecos)
747 * Returns nonzero if a conversion took place
749 int convert_login(char NameToConvert[]) {
753 pw = getpwnam(NameToConvert);
758 strcpy(NameToConvert, pw->pw_gecos);
759 for (a=0; a<strlen(NameToConvert); ++a) {
760 if (NameToConvert[a] == ',') NameToConvert[a] = 0;
766 struct worker_node *worker_list = NULL;
770 * create a worker thread. this function must always be called from within
771 * an S_WORKER_LIST critical section!
773 void create_worker(void) {
775 struct worker_node *n;
778 n = malloc(sizeof(struct worker_node));
780 lprintf(CTDL_EMERG, "can't allocate worker_node, exiting\n");
785 if ((ret = pthread_attr_init(&attr))) {
786 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
791 /* Our per-thread stacks need to be bigger than the default size,
792 * otherwise the MIME parser crashes on FreeBSD, and the IMAP service
793 * crashes on 64-bit Linux.
795 if ((ret = pthread_attr_setstacksize(&attr, THREADSTACKSIZE))) {
796 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n",
799 pthread_attr_destroy(&attr);
803 if ((ret = pthread_create(&n->tid, &attr, worker_thread, NULL) != 0))
806 lprintf(CTDL_ALERT, "Can't create worker thread: %s\n",
810 n->next = worker_list;
812 pthread_attr_destroy(&attr);
817 * Create the indexer thread and begin its operation.
818 * Then create the checkpoint thread and begin its operation.
820 void create_maintenance_threads(void) {
824 if ((ret = pthread_attr_init(&attr))) {
825 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
830 /* Our per-thread stacks need to be bigger than the default size,
831 * otherwise the MIME parser crashes on FreeBSD, and the IMAP service
832 * crashes on 64-bit Linux.
834 if ((ret = pthread_attr_setstacksize(&attr, THREADSTACKSIZE))) {
835 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n",
838 pthread_attr_destroy(&attr);
842 if ((ret = pthread_create(&indexer_thread_tid, &attr, indexer_thread, NULL) != 0)) {
843 lprintf(CTDL_ALERT, "Can't create thread: %s\n", strerror(ret));
846 if ((ret = pthread_create(&checkpoint_thread_tid, &attr, checkpoint_thread, NULL) != 0)) {
847 lprintf(CTDL_ALERT, "Can't create thread: %s\n", strerror(ret));
850 pthread_attr_destroy(&attr);
856 * Purge all sessions which have the 'kill_me' flag set.
857 * This function has code to prevent it from running more than once every
858 * few seconds, because running it after every single unbind would waste a lot
859 * of CPU time and keep the context list locked too much. To force it to run
860 * anyway, set "force" to nonzero.
863 * After that's done, we raise the size of the worker thread pool
864 * if such an action is appropriate.
866 void dead_session_purge(int force) {
867 struct CitContext *ptr; /* general-purpose utility pointer */
868 struct CitContext *rem = NULL; /* list of sessions to be destroyed */
871 if ( (time(NULL) - last_purge) < 5 ) {
872 return; /* Too soon, go away */
877 begin_critical_section(S_SESSION_TABLE);
878 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
879 if ( (ptr->state == CON_IDLE) && (ptr->kill_me) ) {
881 /* Remove the session from the active list */
883 ptr->prev->next = ptr->next;
886 ContextList = ptr->next;
889 ptr->next->prev = ptr->prev;
894 /* And put it on our to-be-destroyed list */
900 end_critical_section(S_SESSION_TABLE);
902 /* Now that we no longer have the session list locked, we can take
903 * our time and destroy any sessions on the to-be-killed list, which
904 * is allocated privately on this thread's stack.
906 while (rem != NULL) {
907 lprintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
914 /* Raise the size of the worker thread pool if necessary. */
915 if ( (num_sessions > num_threads)
916 && (num_threads < config.c_max_workers) ) {
917 begin_critical_section(S_WORKER_LIST);
919 end_critical_section(S_WORKER_LIST);
928 * masterCC is the context we use when not attached to a session. This
929 * function initializes it.
931 void InitializeMasterCC(void) {
932 memset(&masterCC, 0, sizeof(struct CitContext));
933 masterCC.internal_pgm = 1;
943 * Bind a thread to a context. (It's inline merely to speed things up.)
945 INLINE void become_session(struct CitContext *which_con) {
946 pthread_setspecific(MyConKey, (void *)which_con );
952 * This loop just keeps going and going and going...
954 void *worker_thread(void *arg) {
957 struct CitContext *ptr;
958 struct CitContext *bind_me = NULL;
961 struct CitContext *con= NULL; /* Temporary context pointer */
962 struct ServiceFunctionHook *serviceptr;
963 int ssock; /* Descriptor for client socket */
972 while (!time_to_die) {
974 /* make doubly sure we're not holding any stale db handles
975 * which might cause a deadlock.
978 do_select: force_purge = 0;
979 bind_me = NULL; /* Which session shall we handle? */
981 /* Initialize the fdset. */
985 begin_critical_section(S_SESSION_TABLE);
986 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
987 if (ptr->state == CON_IDLE) {
988 FD_SET(ptr->client_socket, &readfds);
989 if (ptr->client_socket > highest)
990 highest = ptr->client_socket;
992 if ((bind_me == NULL) && (ptr->state == CON_READY)) {
994 ptr->state = CON_EXECUTING;
997 end_critical_section(S_SESSION_TABLE);
1003 /* If we got this far, it means that there are no sessions
1004 * which a previous thread marked for attention, so we go
1005 * ahead and get ready to select().
1008 /* First, add the various master sockets to the fdset. */
1009 for (serviceptr = ServiceHookTable; serviceptr != NULL;
1010 serviceptr = serviceptr->next ) {
1011 m = serviceptr->msock;
1012 FD_SET(m, &readfds);
1019 tv.tv_sec = 1; /* wake up every second if no input */
1021 retval = select(highest + 1, &readfds, NULL, NULL, &tv);
1024 if (time_to_die) return(NULL);
1026 /* Now figure out who made this select() unblock.
1027 * First, check for an error or exit condition.
1030 if (errno == EBADF) {
1031 lprintf(CTDL_NOTICE, "select() failed: (%s)\n",
1035 if (errno != EINTR) {
1036 lprintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1038 } else if (!time_to_die)
1042 /* Next, check to see if it's a new client connecting
1043 * on a master socket.
1045 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1046 serviceptr = serviceptr->next ) {
1048 if (FD_ISSET(serviceptr->msock, &readfds)) {
1049 ssock = accept(serviceptr->msock, NULL, 0);
1052 "New client socket %d\n",
1055 /* The master socket is non-blocking but the client
1056 * sockets need to be blocking, otherwise certain
1057 * operations barf on FreeBSD. Not a fatal error.
1059 if (fcntl(ssock, F_SETFL, 0) < 0) {
1061 "citserver: Can't set socket to blocking: %s\n",
1065 /* New context will be created already
1066 * set up in the CON_EXECUTING state.
1068 con = CreateNewContext();
1070 /* Assign our new socket number to it. */
1071 con->client_socket = ssock;
1072 con->h_command_function =
1073 serviceptr->h_command_function;
1074 con->h_async_function =
1075 serviceptr->h_async_function;
1077 /* Determine whether it's a local socket */
1078 if (serviceptr->sockpath != NULL)
1079 con->is_local_socket = 1;
1081 /* Set the SO_REUSEADDR socket option */
1083 setsockopt(ssock, SOL_SOCKET,
1087 become_session(con);
1089 serviceptr->h_greeting_function();
1090 become_session(NULL);
1091 con->state = CON_IDLE;
1097 /* It must be a client socket. Find a context that has data
1098 * waiting on its socket *and* is in the CON_IDLE state. Any
1099 * active sockets other than our chosen one are marked as
1100 * CON_READY so the next thread that comes around can just bind
1101 * to one without having to select() again.
1103 begin_critical_section(S_SESSION_TABLE);
1104 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1105 if ( (FD_ISSET(ptr->client_socket, &readfds))
1106 && (ptr->state != CON_EXECUTING) ) {
1107 ptr->input_waiting = 1;
1109 bind_me = ptr; /* I choose you! */
1110 bind_me->state = CON_EXECUTING;
1113 ptr->state = CON_READY;
1117 end_critical_section(S_SESSION_TABLE);
1120 /* We're bound to a session */
1121 if (bind_me != NULL) {
1122 become_session(bind_me);
1124 /* If the client has sent a command, execute it. */
1125 if (CC->input_waiting) {
1126 CC->h_command_function();
1127 CC->input_waiting = 0;
1130 /* If there are asynchronous messages waiting and the
1131 * client supports it, do those now */
1132 if ((CC->is_async) && (CC->async_waiting)
1133 && (CC->h_async_function != NULL)) {
1134 CC->h_async_function();
1135 CC->async_waiting = 0;
1138 force_purge = CC->kill_me;
1139 become_session(NULL);
1140 bind_me->state = CON_IDLE;
1143 dead_session_purge(force_purge);
1145 check_sched_shutdown();
1148 /* If control reaches this point, the server is shutting down */
1157 * Translate text facility name to syslog.h defined value.
1159 int SyslogFacility(char *name)
1168 { LOG_KERN, "kern" },
1169 { LOG_USER, "user" },
1170 { LOG_MAIL, "mail" },
1171 { LOG_DAEMON, "daemon" },
1172 { LOG_AUTH, "auth" },
1173 { LOG_SYSLOG, "syslog" },
1175 { LOG_NEWS, "news" },
1176 { LOG_UUCP, "uucp" },
1177 { LOG_LOCAL0, "local0" },
1178 { LOG_LOCAL1, "local1" },
1179 { LOG_LOCAL2, "local2" },
1180 { LOG_LOCAL3, "local3" },
1181 { LOG_LOCAL4, "local4" },
1182 { LOG_LOCAL5, "local5" },
1183 { LOG_LOCAL6, "local6" },
1184 { LOG_LOCAL7, "local7" },
1187 for(i = 0; facTbl[i].name != NULL; i++) {
1188 if(!strcasecmp(name, facTbl[i].name))
1189 return facTbl[i].facility;
1196 /********** MEM CHEQQER ***********/
1198 #ifdef DEBUG_MEMORY_LEAKS
1205 void *tracked_malloc(size_t size, char *file, int line) {
1206 struct igheap *thisheap;
1209 block = malloc(size);
1210 if (block == NULL) return(block);
1212 thisheap = malloc(sizeof(struct igheap));
1213 if (thisheap == NULL) {
1218 thisheap->block = block;
1219 strcpy(thisheap->file, file);
1220 thisheap->line = line;
1222 begin_critical_section(S_DEBUGMEMLEAKS);
1223 thisheap->next = igheap;
1225 end_critical_section(S_DEBUGMEMLEAKS);
1231 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1232 struct igheap *thisheap;
1235 block = realloc(ptr, size);
1236 if (block == NULL) return(block);
1238 thisheap = malloc(sizeof(struct igheap));
1239 if (thisheap == NULL) {
1244 thisheap->block = block;
1245 strcpy(thisheap->file, file);
1246 thisheap->line = line;
1248 begin_critical_section(S_DEBUGMEMLEAKS);
1249 thisheap->next = igheap;
1251 end_critical_section(S_DEBUGMEMLEAKS);
1258 void tracked_free(void *ptr) {
1259 struct igheap *thisheap;
1260 struct igheap *trash;
1264 if (igheap == NULL) return;
1265 begin_critical_section(S_DEBUGMEMLEAKS);
1266 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1267 if (thisheap->next != NULL) {
1268 if (thisheap->next->block == ptr) {
1269 trash = thisheap->next;
1270 thisheap->next = thisheap->next->next;
1275 if (igheap->block == ptr) {
1277 igheap = igheap->next;
1280 end_critical_section(S_DEBUGMEMLEAKS);
1283 char *tracked_strdup(const char *s, char *file, int line) {
1286 if (s == NULL) return(NULL);
1287 ptr = tracked_malloc(strlen(s) + 1, file, line);
1288 if (ptr == NULL) return(NULL);
1289 strncpy(ptr, s, strlen(s));
1293 void dump_heap(void) {
1294 struct igheap *thisheap;
1296 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1297 lprintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1298 thisheap->file, thisheap->line);
1302 #endif /* DEBUG_MEMORY_LEAKS */