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.
26 #include <sys/types.h>
29 #include <sys/socket.h>
30 #include <sys/syslog.h>
32 #if TIME_WITH_SYS_TIME
33 # include <sys/time.h>
37 # include <sys/time.h>
44 #include <sys/resource.h>
45 #include <netinet/in.h>
46 #include <netinet/tcp.h>
47 #include <arpa/inet.h>
60 #include "serv_extensions.h"
61 #include "sysdep_decls.h"
62 #include "citserver.h"
66 #include "housekeeping.h"
68 #include "serv_crypto.h"
70 #ifdef HAVE_SYS_SELECT_H
71 #include <sys/select.h>
79 #ifdef DEBUG_MEMORY_LEAKS
87 struct igheap *igheap = NULL;
91 pthread_mutex_t Critters[MAX_SEMAPHORES]; /* Things needing locking */
92 pthread_key_t MyConKey; /* TSD key for MyContext() */
94 int verbosity = DEFAULT_VERBOSITY; /* Logging level */
96 struct CitContext masterCC;
97 time_t last_purge = 0; /* Last dead session purge */
98 static int num_threads = 0; /* Current number of threads */
99 int num_sessions = 0; /* Current number of sessions */
101 int syslog_facility = (-1);
105 * lprintf() ... Write logging information
107 * Note: the variable "buf" below needs to be large enough to handle any
108 * log data sent through this function. BE CAREFUL!
110 extern int running_as_daemon;
111 static int enable_syslog = 1;
112 void lprintf(enum LogLevel loglevel, const char *format, ...) {
116 va_start(arg_ptr, format);
117 vsyslog(loglevel, format, arg_ptr);
121 if (enable_syslog && LogHookTable == 0) return;
123 /* legacy output code; hooks get processed first */
125 va_start(arg_ptr, format);
126 vsnprintf(buf, sizeof(buf), format, arg_ptr);
128 PerformLogHooks(loglevel, buf);
130 if (enable_syslog || running_as_daemon) return;
132 /* if we run in forground and syslog is disabled, log to terminal */
133 if (loglevel <= verbosity) {
138 gettimeofday(&tv, NULL);
139 /* Promote to time_t; types differ on some OSes (like darwin) */
140 unixtime = tv.tv_sec;
141 localtime_r(&unixtime, &tim);
142 if (CC->cs_pid != 0) {
144 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] %s",
145 tim.tm_year + 1900, tim.tm_mon + 1,
146 tim.tm_mday, tim.tm_hour, tim.tm_min,
147 tim.tm_sec, (long)tv.tv_usec,
151 "%04d/%02d/%02d %2d:%02d:%02d.%06ld %s",
152 tim.tm_year + 1900, tim.tm_mon + 1,
153 tim.tm_mday, tim.tm_hour, tim.tm_min,
154 tim.tm_sec, (long)tv.tv_usec, buf);
163 * We used to use master_cleanup() as a signal handler to shut down the server.
164 * however, master_cleanup() and the functions it calls do some things that
165 * aren't such a good idea to do from a signal handler: acquiring mutexes,
166 * playing with signal masks on BSDI systems, etc. so instead we install the
167 * following signal handler to set a global variable to inform the main loop
168 * that it's time to call master_cleanup() and exit.
171 volatile int time_to_die = 0;
173 static RETSIGTYPE signal_cleanup(int signum) {
174 lprintf(CTDL_DEBUG, "Signal %d received.\n", signum);
176 master_cleanup(); /* will this work? */
181 * Some initialization stuff...
183 void init_sysdep(void) {
186 /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
190 getrlimit(RLIMIT_NOFILE, &rl);
191 rl.rlim_cur = FD_SETSIZE;
192 rl.rlim_max = FD_SETSIZE;
193 setrlimit(RLIMIT_NOFILE, &rl);
197 /* If we've got OpenSSL, we're going to use it. */
202 /* Set up a bunch of semaphores to be used for critical sections */
203 for (i=0; i<MAX_SEMAPHORES; ++i) {
204 pthread_mutex_init(&Critters[i], NULL);
208 * Set up a place to put thread-specific data.
209 * We only need a single pointer per thread - it points to the
210 * CitContext structure (in the ContextList linked list) of the
211 * session to which the calling thread is currently bound.
213 if (pthread_key_create(&MyConKey, NULL) != 0) {
214 lprintf(CTDL_CRIT, "Can't create TSD key!! %s\n", strerror(errno));
218 * The action for unexpected signals and exceptions should be to
219 * call signal_cleanup() to gracefully shut down the server.
221 signal(SIGINT, signal_cleanup);
222 signal(SIGQUIT, signal_cleanup);
223 signal(SIGHUP, signal_cleanup);
224 signal(SIGTERM, signal_cleanup);
227 * Do not shut down the server on broken pipe signals, otherwise the
228 * whole Citadel service would come down whenever a single client
231 signal(SIGPIPE, SIG_IGN);
236 * Obtain a semaphore lock to begin a critical section.
238 void begin_critical_section(int which_one)
240 /* lprintf(CTDL_DEBUG, "begin_critical_section(%d)\n", which_one); */
242 /* For all types of critical sections except those listed here,
243 * ensure nobody ever tries to do a critical section within a
244 * transaction; this could lead to deadlock.
246 if ( (which_one != S_FLOORCACHE)
247 #ifdef DEBUG_MEMORY_LEAKS
248 && (which_one != S_DEBUGMEMLEAKS)
253 pthread_mutex_lock(&Critters[which_one]);
257 * Release a semaphore lock to end a critical section.
259 void end_critical_section(int which_one)
261 pthread_mutex_unlock(&Critters[which_one]);
267 * This is a generic function to set up a master socket for listening on
268 * a TCP port. The server shuts down if the bind fails.
271 int ig_tcp_server(char *ip_addr, int port_number, int queue_len)
273 struct sockaddr_in sin;
275 int actual_queue_len;
277 actual_queue_len = queue_len;
278 if (actual_queue_len < 5) actual_queue_len = 5;
280 memset(&sin, 0, sizeof(sin));
281 sin.sin_family = AF_INET;
282 sin.sin_port = htons((u_short)port_number);
283 if (ip_addr == NULL) {
284 sin.sin_addr.s_addr = INADDR_ANY;
287 sin.sin_addr.s_addr = inet_addr(ip_addr);
290 if (sin.sin_addr.s_addr == INADDR_NONE) {
291 sin.sin_addr.s_addr = INADDR_ANY;
294 s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
297 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
303 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &i, sizeof(i));
305 if (bind(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) {
306 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
312 if (listen(s, actual_queue_len) < 0) {
313 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n", strerror(errno));
324 * Create a Unix domain socket and listen on it
326 int ig_uds_server(char *sockpath, int queue_len)
328 struct sockaddr_un addr;
331 int actual_queue_len;
333 actual_queue_len = queue_len;
334 if (actual_queue_len < 5) actual_queue_len = 5;
336 i = unlink(sockpath);
337 if (i != 0) if (errno != ENOENT) {
338 lprintf(CTDL_EMERG, "citserver: can't unlink %s: %s\n",
339 sockpath, strerror(errno));
343 memset(&addr, 0, sizeof(addr));
344 addr.sun_family = AF_UNIX;
345 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
347 s = socket(AF_UNIX, SOCK_STREAM, 0);
349 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
354 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
355 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
360 if (listen(s, actual_queue_len) < 0) {
361 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n", strerror(errno));
365 chmod(sockpath, 0777);
372 * Return a pointer to the CitContext structure bound to the thread which
373 * called this function. If there's no such binding (for example, if it's
374 * called by the housekeeper thread) then a generic 'master' CC is returned.
376 * This function is used *VERY* frequently and must be kept small.
378 struct CitContext *MyContext(void) {
380 register struct CitContext *c;
382 return ((c = (struct CitContext *) pthread_getspecific(MyConKey),
383 c == NULL) ? &masterCC : c
389 * Initialize a new context and place it in the list. The session number
390 * used to be the PID (which is why it's called cs_pid), but that was when we
391 * had one process per session. Now we just assign them sequentially, starting
392 * at 1 (don't change it to 0 because masterCC uses 0) and re-using them when
393 * sessions terminate.
395 struct CitContext *CreateNewContext(void) {
396 struct CitContext *me, *ptr;
398 me = (struct CitContext *) malloc(sizeof(struct CitContext));
400 lprintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
403 memset(me, 0, sizeof(struct CitContext));
405 /* The new context will be created already in the CON_EXECUTING state
406 * in order to prevent another thread from grabbing it while it's
409 me->state = CON_EXECUTING;
413 * Generate a unique session number and insert this context into
416 begin_critical_section(S_SESSION_TABLE);
418 if (ContextList == NULL) {
425 else if (ContextList->cs_pid > 1) {
427 me->next = ContextList;
433 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
434 if (ptr->next == NULL) {
436 me->cs_pid = ptr->cs_pid + 1;
441 else if (ptr->next->cs_pid > (ptr->cs_pid+1)) {
443 me->next = ptr->next;
444 ptr->next->prev = me;
446 me->cs_pid = ptr->cs_pid + 1;
452 DONE: ++num_sessions;
453 end_critical_section(S_SESSION_TABLE);
459 * The following functions implement output buffering. If the kernel supplies
460 * native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
461 * user-space buffering.
464 # define HAVE_TCP_BUFFERING
467 # define HAVE_TCP_BUFFERING
468 # define TCP_CORK TCP_NOPUSH
473 #ifdef HAVE_TCP_BUFFERING
474 static unsigned on = 1, off = 0;
475 void buffer_output(void) {
476 struct CitContext *ctx = MyContext();
477 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
481 void unbuffer_output(void) {
482 struct CitContext *ctx = MyContext();
483 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
487 void flush_output(void) {
488 struct CitContext *ctx = MyContext();
489 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
490 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
493 void buffer_output(void) {
494 if (CC->buffering == 0) {
497 CC->output_buffer = malloc(SIZ);
501 void flush_output(void) {
502 if (CC->buffering == 1) {
503 client_write(CC->output_buffer, CC->buffer_len);
508 void unbuffer_output(void) {
509 if (CC->buffering == 1) {
511 /* We don't call flush_output because we can't. */
512 client_write(CC->output_buffer, CC->buffer_len);
514 free(CC->output_buffer);
515 CC->output_buffer = NULL;
523 * client_write() ... Send binary data to the client.
525 void client_write(char *buf, int nbytes)
527 int bytes_written = 0;
530 #ifndef HAVE_TCP_BUFFERING
531 int old_buffer_len = 0;
534 if (CC->redirect_fp != NULL) {
535 fwrite(buf, (size_t)nbytes, (size_t)1, CC->redirect_fp);
539 if (CC->redirect_sock > 0) {
540 sock = CC->redirect_sock; /* and continue below... */
543 sock = CC->client_socket;
546 #ifndef HAVE_TCP_BUFFERING
547 /* If we're buffering for later, do that now. */
549 old_buffer_len = CC->buffer_len;
550 CC->buffer_len += nbytes;
551 CC->output_buffer = realloc(CC->output_buffer, CC->buffer_len);
552 memcpy(&CC->output_buffer[old_buffer_len], buf, nbytes);
557 /* Ok, at this point we're not buffering. Go ahead and write. */
560 if (CC->redirect_ssl) {
561 client_write_ssl(buf, nbytes);
566 while (bytes_written < nbytes) {
567 retval = write(sock, &buf[bytes_written],
568 nbytes - bytes_written);
570 lprintf(CTDL_ERR, "client_write() failed: %s\n",
572 if (sock == CC->client_socket) CC->kill_me = 1;
575 bytes_written = bytes_written + retval;
581 * cprintf() ... Send formatted printable data to the client. It is
582 * implemented in terms of client_write() but remains in
583 * sysdep.c in case we port to somewhere without va_args...
585 void cprintf(const char *format, ...) {
589 va_start(arg_ptr, format);
590 if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
591 buf[sizeof buf - 2] = '\n';
592 client_write(buf, strlen(buf));
598 * Read data from the client socket.
600 * 1 Requested number of bytes has been read.
601 * 0 Request timed out.
602 * -1 The socket is broken.
603 * If the socket breaks, the session will be terminated.
605 int client_read_to(char *buf, int bytes, int timeout)
613 if (CC->redirect_ssl) {
614 return (client_read_ssl(buf, bytes, timeout));
620 FD_SET(CC->client_socket, &rfds);
624 retval = select( (CC->client_socket)+1,
625 &rfds, NULL, NULL, &tv);
627 if (FD_ISSET(CC->client_socket, &rfds) == 0) {
631 rlen = read(CC->client_socket, &buf[len], bytes-len);
633 lprintf(CTDL_ERR, "client_read() failed: %s\n",
644 * Read data from the client socket with default timeout.
645 * (This is implemented in terms of client_read_to() and could be
646 * justifiably moved out of sysdep.c)
648 INLINE int client_read(char *buf, int bytes)
650 return(client_read_to(buf, bytes, config.c_sleeping));
655 * client_getln() ... Get a LF-terminated line of text from the client.
656 * (This is implemented in terms of client_read() and could be
657 * justifiably moved out of sysdep.c)
659 int client_getln(char *buf, int bufsize)
663 /* Read one character at a time.
666 retval = client_read(&buf[i], 1);
667 if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
671 /* If we got a long line, discard characters until the newline.
673 if (i == (bufsize-1))
674 while (buf[i] != '\n' && retval == 1)
675 retval = client_read(&buf[i], 1);
677 /* Strip the trailing newline and any trailing nonprintables (cr's)
680 while ((strlen(buf)>0)&&(!isprint(buf[strlen(buf)-1])))
681 buf[strlen(buf)-1] = 0;
682 if (retval < 0) strcpy(buf, "000");
689 * The system-dependent part of master_cleanup() - close the master socket.
691 void sysdep_master_cleanup(void) {
692 struct ServiceFunctionHook *serviceptr;
695 * close all protocol master sockets
697 for (serviceptr = ServiceHookTable; serviceptr != NULL;
698 serviceptr = serviceptr->next ) {
700 if (serviceptr->tcp_port > 0)
701 lprintf(CTDL_INFO, "Closing listener on port %d\n",
702 serviceptr->tcp_port);
704 if (serviceptr->sockpath != NULL)
705 lprintf(CTDL_INFO, "Closing listener on '%s'\n",
706 serviceptr->sockpath);
708 close(serviceptr->msock);
710 /* If it's a Unix domain socket, remove the file. */
711 if (serviceptr->sockpath != NULL) {
712 unlink(serviceptr->sockpath);
719 * Terminate another session.
720 * (This could justifiably be moved out of sysdep.c because it
721 * no longer does anything that is system-dependent.)
723 void kill_session(int session_to_kill) {
724 struct CitContext *ptr;
726 begin_critical_section(S_SESSION_TABLE);
727 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
728 if (ptr->cs_pid == session_to_kill) {
732 end_critical_section(S_SESSION_TABLE);
739 * Start running as a daemon.
741 void start_daemon(int unused) {
742 close(0); close(1); close(2);
745 signal(SIGHUP,SIG_IGN);
746 signal(SIGINT,SIG_IGN);
747 signal(SIGQUIT,SIG_IGN);
753 * Generic routine to convert a login name to a full name (gecos)
754 * Returns nonzero if a conversion took place
756 int convert_login(char NameToConvert[]) {
760 pw = getpwnam(NameToConvert);
765 strcpy(NameToConvert, pw->pw_gecos);
766 for (a=0; a<strlen(NameToConvert); ++a) {
767 if (NameToConvert[a] == ',') NameToConvert[a] = 0;
773 struct worker_node *worker_list = NULL;
777 * create a worker thread. this function must always be called from within
778 * an S_WORKER_LIST critical section!
780 void create_worker(void) {
782 struct worker_node *n;
785 n = malloc(sizeof(struct worker_node));
787 lprintf(CTDL_EMERG, "can't allocate worker_node, exiting\n");
792 if ((ret = pthread_attr_init(&attr))) {
793 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
798 /* Our per-thread stacks need to be bigger than the default size, otherwise
799 * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
802 if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
803 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n", strerror(ret));
805 pthread_attr_destroy(&attr);
809 if ((ret = pthread_create(&n->tid, &attr, worker_thread, NULL) != 0))
812 lprintf(CTDL_ALERT, "Can't create worker thread: %s\n",
816 n->next = worker_list;
818 pthread_attr_destroy(&attr);
824 * Purge all sessions which have the 'kill_me' flag set.
825 * This function has code to prevent it from running more than once every
826 * few seconds, because running it after every single unbind would waste a lot
827 * of CPU time and keep the context list locked too much. To force it to run
828 * anyway, set "force" to nonzero.
831 * After that's done, we raise the size of the worker thread pool
832 * if such an action is appropriate.
834 void dead_session_purge(int force) {
835 struct CitContext *ptr, *rem;
838 if ( (time(NULL) - last_purge) < 5 ) {
839 return; /* Too soon, go away */
846 begin_critical_section(S_SESSION_TABLE);
847 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
848 if ( (ptr->state == CON_IDLE) && (ptr->kill_me) ) {
852 end_critical_section(S_SESSION_TABLE);
854 /* RemoveContext() enters its own S_SESSION_TABLE critical
855 * section, so we have to do it like this.
858 lprintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
862 } while (rem != NULL);
864 /* Raise the size of the worker thread pool if necessary. */
866 if ( (num_sessions > num_threads)
867 && (num_threads < config.c_max_workers) ) {
868 begin_critical_section(S_WORKER_LIST);
870 end_critical_section(S_WORKER_LIST);
879 * Redirect a session's output to a file or socket.
880 * This function may be called with a file handle *or* a socket (but not
881 * both). Call with neither to return output to its normal client socket.
883 void CtdlRedirectOutput(FILE *fp, int sock) {
885 if (fp != NULL) CC->redirect_fp = fp;
886 else CC->redirect_fp = NULL;
888 if (sock > 0) CC->redirect_sock = sock;
889 else CC->redirect_sock = (-1);
895 * masterCC is the context we use when not attached to a session. This
896 * function initializes it.
898 void InitializeMasterCC(void) {
899 memset(&masterCC, 0, sizeof(struct CitContext));
900 masterCC.internal_pgm = 1;
910 * Bind a thread to a context. (It's inline merely to speed things up.)
912 INLINE void become_session(struct CitContext *which_con) {
913 pthread_setspecific(MyConKey, (void *)which_con );
919 * This loop just keeps going and going and going...
921 void *worker_thread(void *arg) {
924 struct CitContext *ptr;
925 struct CitContext *bind_me = NULL;
928 struct CitContext *con= NULL; /* Temporary context pointer */
929 struct ServiceFunctionHook *serviceptr;
930 int ssock; /* Descriptor for client socket */
939 while (!time_to_die) {
941 /* make doubly sure we're not holding any stale db handles
942 * which might cause a deadlock.
945 do_select: force_purge = 0;
946 bind_me = NULL; /* Which session shall we handle? */
948 /* Initialize the fdset. */
952 begin_critical_section(S_SESSION_TABLE);
953 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
954 if (ptr->state == CON_IDLE) {
955 FD_SET(ptr->client_socket, &readfds);
956 if (ptr->client_socket > highest)
957 highest = ptr->client_socket;
959 if ((bind_me == NULL) && (ptr->state == CON_READY)) {
961 ptr->state = CON_EXECUTING;
964 end_critical_section(S_SESSION_TABLE);
966 if (bind_me) goto SKIP_SELECT;
968 /* If we got this far, it means that there are no sessions
969 * which a previous thread marked for attention, so we go
970 * ahead and get ready to select().
973 /* First, add the various master sockets to the fdset. */
974 for (serviceptr = ServiceHookTable; serviceptr != NULL;
975 serviceptr = serviceptr->next ) {
976 m = serviceptr->msock;
984 tv.tv_sec = 1; /* wake up every second if no input */
986 retval = select(highest + 1, &readfds, NULL, NULL, &tv);
989 if (time_to_die) return(NULL);
991 /* Now figure out who made this select() unblock.
992 * First, check for an error or exit condition.
995 if (errno == EBADF) {
996 lprintf(CTDL_NOTICE, "select() failed: (%s)\n",
1000 if (errno != EINTR) {
1001 lprintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1003 } else if (!time_to_die)
1007 /* Next, check to see if it's a new client connecting
1008 * on a master socket.
1010 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1011 serviceptr = serviceptr->next ) {
1013 if (FD_ISSET(serviceptr->msock, &readfds)) {
1014 ssock = accept(serviceptr->msock, NULL, 0);
1017 "citserver: accept(): %s\n",
1022 "New client socket %d\n",
1025 /* New context will be created already
1026 * set up in the CON_EXECUTING state.
1028 con = CreateNewContext();
1030 /* Assign new socket number to it. */
1031 con->client_socket = ssock;
1032 con->h_command_function =
1033 serviceptr->h_command_function;
1034 con->h_async_function =
1035 serviceptr->h_async_function;
1037 /* Determine whether local socket */
1038 if (serviceptr->sockpath != NULL)
1039 con->is_local_socket = 1;
1041 /* Set the SO_REUSEADDR socket option */
1043 setsockopt(ssock, SOL_SOCKET,
1047 become_session(con);
1049 serviceptr->h_greeting_function();
1050 become_session(NULL);
1051 con->state = CON_IDLE;
1057 /* It must be a client socket. Find a context that has data
1058 * waiting on its socket *and* is in the CON_IDLE state. Any
1059 * active sockets other than our chosen one are marked as
1060 * CON_READY so the next thread that comes around can just bind
1061 * to one without having to select() again.
1063 begin_critical_section(S_SESSION_TABLE);
1064 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1065 if ( (FD_ISSET(ptr->client_socket, &readfds))
1066 && (ptr->state != CON_EXECUTING) ) {
1067 ptr->input_waiting = 1;
1069 bind_me = ptr; /* I choose you! */
1070 bind_me->state = CON_EXECUTING;
1073 ptr->state = CON_READY;
1077 end_critical_section(S_SESSION_TABLE);
1080 /* We're bound to a session */
1081 if (bind_me != NULL) {
1082 become_session(bind_me);
1084 /* If the client has sent a command, execute it. */
1085 if (CC->input_waiting) {
1086 CC->h_command_function();
1087 CC->input_waiting = 0;
1090 /* If there are asynchronous messages waiting and the
1091 * client supports it, do those now */
1092 if ((CC->is_async) && (CC->async_waiting)
1093 && (CC->h_async_function != NULL)) {
1094 CC->h_async_function();
1095 CC->async_waiting = 0;
1098 force_purge = CC->kill_me;
1099 become_session(NULL);
1100 bind_me->state = CON_IDLE;
1103 dead_session_purge(force_purge);
1105 check_sched_shutdown();
1108 /* If control reaches this point, the server is shutting down */
1117 * Translate text facility name to syslog.h defined value.
1119 int SyslogFacility(char *name)
1128 { LOG_KERN, "kern" },
1129 { LOG_USER, "user" },
1130 { LOG_MAIL, "mail" },
1131 { LOG_DAEMON, "daemon" },
1132 { LOG_AUTH, "auth" },
1133 { LOG_SYSLOG, "syslog" },
1135 { LOG_NEWS, "news" },
1136 { LOG_UUCP, "uucp" },
1137 { LOG_LOCAL0, "local0" },
1138 { LOG_LOCAL1, "local1" },
1139 { LOG_LOCAL2, "local2" },
1140 { LOG_LOCAL3, "local3" },
1141 { LOG_LOCAL4, "local4" },
1142 { LOG_LOCAL5, "local5" },
1143 { LOG_LOCAL6, "local6" },
1144 { LOG_LOCAL7, "local7" },
1147 for(i = 0; facTbl[i].name != NULL; i++) {
1148 if(!strcasecmp(name, facTbl[i].name))
1149 return facTbl[i].facility;
1156 /********** MEM CHEQQER ***********/
1158 #ifdef DEBUG_MEMORY_LEAKS
1165 void *tracked_malloc(size_t size, char *file, int line) {
1166 struct igheap *thisheap;
1169 block = malloc(size);
1170 if (block == NULL) return(block);
1172 thisheap = malloc(sizeof(struct igheap));
1173 if (thisheap == NULL) {
1178 thisheap->block = block;
1179 strcpy(thisheap->file, file);
1180 thisheap->line = line;
1182 begin_critical_section(S_DEBUGMEMLEAKS);
1183 thisheap->next = igheap;
1185 end_critical_section(S_DEBUGMEMLEAKS);
1191 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1192 struct igheap *thisheap;
1195 block = realloc(ptr, size);
1196 if (block == NULL) return(block);
1198 thisheap = malloc(sizeof(struct igheap));
1199 if (thisheap == NULL) {
1204 thisheap->block = block;
1205 strcpy(thisheap->file, file);
1206 thisheap->line = line;
1208 begin_critical_section(S_DEBUGMEMLEAKS);
1209 thisheap->next = igheap;
1211 end_critical_section(S_DEBUGMEMLEAKS);
1218 void tracked_free(void *ptr) {
1219 struct igheap *thisheap;
1220 struct igheap *trash;
1224 if (igheap == NULL) return;
1225 begin_critical_section(S_DEBUGMEMLEAKS);
1226 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1227 if (thisheap->next != NULL) {
1228 if (thisheap->next->block == ptr) {
1229 trash = thisheap->next;
1230 thisheap->next = thisheap->next->next;
1235 if (igheap->block == ptr) {
1237 igheap = igheap->next;
1240 end_critical_section(S_DEBUGMEMLEAKS);
1243 char *tracked_strdup(const char *s, char *file, int line) {
1246 if (s == NULL) return(NULL);
1247 ptr = tracked_malloc(strlen(s) + 1, file, line);
1248 if (ptr == NULL) return(NULL);
1249 strncpy(ptr, s, strlen(s));
1253 void dump_heap(void) {
1254 struct igheap *thisheap;
1256 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1257 lprintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1258 thisheap->file, thisheap->line);
1262 #endif /* DEBUG_MEMORY_LEAKS */