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, "Caught signal %d; shutting down.\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);
225 signal(SIGSEGV, 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 if (listen(s, actual_queue_len) < 0) {
314 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n", strerror(errno));
325 * Create a Unix domain socket and listen on it
327 int ig_uds_server(char *sockpath, int queue_len)
329 struct sockaddr_un addr;
332 int actual_queue_len;
334 actual_queue_len = queue_len;
335 if (actual_queue_len < 5) actual_queue_len = 5;
337 i = unlink(sockpath);
338 if (i != 0) if (errno != ENOENT) {
339 lprintf(CTDL_EMERG, "citserver: can't unlink %s: %s\n",
340 sockpath, strerror(errno));
344 memset(&addr, 0, sizeof(addr));
345 addr.sun_family = AF_UNIX;
346 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
348 s = socket(AF_UNIX, SOCK_STREAM, 0);
350 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
355 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
356 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
361 if (listen(s, actual_queue_len) < 0) {
362 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n", strerror(errno));
366 chmod(sockpath, 0777);
373 * Return a pointer to the CitContext structure bound to the thread which
374 * called this function. If there's no such binding (for example, if it's
375 * called by the housekeeper thread) then a generic 'master' CC is returned.
377 * This function is used *VERY* frequently and must be kept small.
379 struct CitContext *MyContext(void) {
381 register struct CitContext *c;
383 return ((c = (struct CitContext *) pthread_getspecific(MyConKey),
384 c == NULL) ? &masterCC : c
390 * Initialize a new context and place it in the list. The session number
391 * used to be the PID (which is why it's called cs_pid), but that was when we
392 * had one process per session. Now we just assign them sequentially, starting
393 * at 1 (don't change it to 0 because masterCC uses 0) and re-using them when
394 * sessions terminate.
396 struct CitContext *CreateNewContext(void) {
397 struct CitContext *me, *ptr;
399 me = (struct CitContext *) malloc(sizeof(struct CitContext));
401 lprintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
404 memset(me, 0, sizeof(struct CitContext));
406 /* The new context will be created already in the CON_EXECUTING state
407 * in order to prevent another thread from grabbing it while it's
410 me->state = CON_EXECUTING;
414 * Generate a unique session number and insert this context into
417 begin_critical_section(S_SESSION_TABLE);
419 if (ContextList == NULL) {
426 else if (ContextList->cs_pid > 1) {
428 me->next = ContextList;
434 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
435 if (ptr->next == NULL) {
437 me->cs_pid = ptr->cs_pid + 1;
442 else if (ptr->next->cs_pid > (ptr->cs_pid+1)) {
444 me->next = ptr->next;
445 ptr->next->prev = me;
447 me->cs_pid = ptr->cs_pid + 1;
453 DONE: ++num_sessions;
454 end_critical_section(S_SESSION_TABLE);
460 * The following functions implement output buffering. If the kernel supplies
461 * native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
462 * user-space buffering.
465 # define HAVE_TCP_BUFFERING
468 # define HAVE_TCP_BUFFERING
469 # define TCP_CORK TCP_NOPUSH
474 #ifdef HAVE_TCP_BUFFERING
475 static unsigned on = 1, off = 0;
476 void buffer_output(void) {
477 struct CitContext *ctx = MyContext();
478 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
482 void unbuffer_output(void) {
483 struct CitContext *ctx = MyContext();
484 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
488 void flush_output(void) {
489 struct CitContext *ctx = MyContext();
490 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
491 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
494 void buffer_output(void) {
495 if (CC->buffering == 0) {
498 CC->output_buffer = malloc(SIZ);
502 void flush_output(void) {
503 if (CC->buffering == 1) {
504 client_write(CC->output_buffer, CC->buffer_len);
509 void unbuffer_output(void) {
510 if (CC->buffering == 1) {
512 /* We don't call flush_output because we can't. */
513 client_write(CC->output_buffer, CC->buffer_len);
515 free(CC->output_buffer);
516 CC->output_buffer = NULL;
524 * client_write() ... Send binary data to the client.
526 void client_write(char *buf, int nbytes)
528 int bytes_written = 0;
531 #ifndef HAVE_TCP_BUFFERING
532 int old_buffer_len = 0;
535 if (CC->redirect_fp != NULL) {
536 fwrite(buf, (size_t)nbytes, (size_t)1, CC->redirect_fp);
540 if (CC->redirect_sock > 0) {
541 sock = CC->redirect_sock; /* and continue below... */
544 sock = CC->client_socket;
547 #ifndef HAVE_TCP_BUFFERING
548 /* If we're buffering for later, do that now. */
550 old_buffer_len = CC->buffer_len;
551 CC->buffer_len += nbytes;
552 CC->output_buffer = realloc(CC->output_buffer, CC->buffer_len);
553 memcpy(&CC->output_buffer[old_buffer_len], buf, nbytes);
558 /* Ok, at this point we're not buffering. Go ahead and write. */
561 if (CC->redirect_ssl) {
562 client_write_ssl(buf, nbytes);
567 while (bytes_written < nbytes) {
568 retval = write(sock, &buf[bytes_written],
569 nbytes - bytes_written);
571 lprintf(CTDL_ERR, "client_write() failed: %s\n",
573 if (sock == CC->client_socket) CC->kill_me = 1;
576 bytes_written = bytes_written + retval;
582 * cprintf() ... Send formatted printable data to the client. It is
583 * implemented in terms of client_write() but remains in
584 * sysdep.c in case we port to somewhere without va_args...
586 void cprintf(const char *format, ...) {
590 va_start(arg_ptr, format);
591 if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
592 buf[sizeof buf - 2] = '\n';
593 client_write(buf, strlen(buf));
599 * Read data from the client socket.
601 * 1 Requested number of bytes has been read.
602 * 0 Request timed out.
603 * -1 The socket is broken.
604 * If the socket breaks, the session will be terminated.
606 int client_read_to(char *buf, int bytes, int timeout)
614 if (CC->redirect_ssl) {
615 return (client_read_ssl(buf, bytes, timeout));
621 FD_SET(CC->client_socket, &rfds);
625 retval = select( (CC->client_socket)+1,
626 &rfds, NULL, NULL, &tv);
628 if (FD_ISSET(CC->client_socket, &rfds) == 0) {
632 rlen = read(CC->client_socket, &buf[len], bytes-len);
634 lprintf(CTDL_ERR, "client_read() failed: %s\n",
645 * Read data from the client socket with default timeout.
646 * (This is implemented in terms of client_read_to() and could be
647 * justifiably moved out of sysdep.c)
649 INLINE int client_read(char *buf, int bytes)
651 return(client_read_to(buf, bytes, config.c_sleeping));
656 * client_getln() ... Get a LF-terminated line of text from the client.
657 * (This is implemented in terms of client_read() and could be
658 * justifiably moved out of sysdep.c)
660 int client_getln(char *buf, int bufsize)
664 /* Read one character at a time.
667 retval = client_read(&buf[i], 1);
668 if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
672 /* If we got a long line, discard characters until the newline.
674 if (i == (bufsize-1))
675 while (buf[i] != '\n' && retval == 1)
676 retval = client_read(&buf[i], 1);
678 /* Strip the trailing newline and any trailing nonprintables (cr's)
681 while ((strlen(buf)>0)&&(!isprint(buf[strlen(buf)-1])))
682 buf[strlen(buf)-1] = 0;
683 if (retval < 0) strcpy(buf, "000");
690 * The system-dependent part of master_cleanup() - close the master socket.
692 void sysdep_master_cleanup(void) {
693 struct ServiceFunctionHook *serviceptr;
696 * close all protocol master sockets
698 for (serviceptr = ServiceHookTable; serviceptr != NULL;
699 serviceptr = serviceptr->next ) {
701 if (serviceptr->tcp_port > 0)
702 lprintf(CTDL_INFO, "Closing listener on port %d\n",
703 serviceptr->tcp_port);
705 if (serviceptr->sockpath != NULL)
706 lprintf(CTDL_INFO, "Closing listener on '%s'\n",
707 serviceptr->sockpath);
709 close(serviceptr->msock);
711 /* If it's a Unix domain socket, remove the file. */
712 if (serviceptr->sockpath != NULL) {
713 unlink(serviceptr->sockpath);
720 * Terminate another session.
721 * (This could justifiably be moved out of sysdep.c because it
722 * no longer does anything that is system-dependent.)
724 void kill_session(int session_to_kill) {
725 struct CitContext *ptr;
727 begin_critical_section(S_SESSION_TABLE);
728 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
729 if (ptr->cs_pid == session_to_kill) {
733 end_critical_section(S_SESSION_TABLE);
740 * Start running as a daemon.
742 void start_daemon(int unused) {
743 close(0); close(1); close(2);
746 signal(SIGHUP,SIG_IGN);
747 signal(SIGINT,SIG_IGN);
748 signal(SIGQUIT,SIG_IGN);
754 * Generic routine to convert a login name to a full name (gecos)
755 * Returns nonzero if a conversion took place
757 int convert_login(char NameToConvert[]) {
761 pw = getpwnam(NameToConvert);
766 strcpy(NameToConvert, pw->pw_gecos);
767 for (a=0; a<strlen(NameToConvert); ++a) {
768 if (NameToConvert[a] == ',') NameToConvert[a] = 0;
774 struct worker_node *worker_list = NULL;
778 * create a worker thread. this function must always be called from within
779 * an S_WORKER_LIST critical section!
781 void create_worker(void) {
783 struct worker_node *n;
786 n = malloc(sizeof(struct worker_node));
788 lprintf(CTDL_EMERG, "can't allocate worker_node, exiting\n");
793 if ((ret = pthread_attr_init(&attr))) {
794 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
799 /* Our per-thread stacks need to be bigger than the default size, otherwise
800 * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
803 if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
804 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n", strerror(ret));
806 pthread_attr_destroy(&attr);
810 if ((ret = pthread_create(&n->tid, &attr, worker_thread, NULL) != 0))
813 lprintf(CTDL_ALERT, "Can't create worker thread: %s\n",
817 n->next = worker_list;
819 pthread_attr_destroy(&attr);
825 * Purge all sessions which have the 'kill_me' flag set.
826 * This function has code to prevent it from running more than once every
827 * few seconds, because running it after every single unbind would waste a lot
828 * of CPU time and keep the context list locked too much. To force it to run
829 * anyway, set "force" to nonzero.
832 * After that's done, we raise the size of the worker thread pool
833 * if such an action is appropriate.
835 void dead_session_purge(int force) {
836 struct CitContext *ptr, *rem;
839 if ( (time(NULL) - last_purge) < 5 ) {
840 return; /* Too soon, go away */
847 begin_critical_section(S_SESSION_TABLE);
848 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
849 if ( (ptr->state == CON_IDLE) && (ptr->kill_me) ) {
853 end_critical_section(S_SESSION_TABLE);
855 /* RemoveContext() enters its own S_SESSION_TABLE critical
856 * section, so we have to do it like this.
859 lprintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
863 } while (rem != NULL);
865 /* Raise the size of the worker thread pool if necessary. */
867 if ( (num_sessions > num_threads)
868 && (num_threads < config.c_max_workers) ) {
869 begin_critical_section(S_WORKER_LIST);
871 end_critical_section(S_WORKER_LIST);
880 * Redirect a session's output to a file or socket.
881 * This function may be called with a file handle *or* a socket (but not
882 * both). Call with neither to return output to its normal client socket.
884 void CtdlRedirectOutput(FILE *fp, int sock) {
886 if (fp != NULL) CC->redirect_fp = fp;
887 else CC->redirect_fp = NULL;
889 if (sock > 0) CC->redirect_sock = sock;
890 else CC->redirect_sock = (-1);
896 * masterCC is the context we use when not attached to a session. This
897 * function initializes it.
899 void InitializeMasterCC(void) {
900 memset(&masterCC, 0, sizeof(struct CitContext));
901 masterCC.internal_pgm = 1;
911 * Bind a thread to a context. (It's inline merely to speed things up.)
913 INLINE void become_session(struct CitContext *which_con) {
914 pthread_setspecific(MyConKey, (void *)which_con );
920 * This loop just keeps going and going and going...
922 void *worker_thread(void *arg) {
925 struct CitContext *ptr;
926 struct CitContext *bind_me = NULL;
929 struct CitContext *con= NULL; /* Temporary context pointer */
930 struct ServiceFunctionHook *serviceptr;
931 int ssock; /* Descriptor for client socket */
940 while (!time_to_die) {
942 /* make doubly sure we're not holding any stale db handles
943 * which might cause a deadlock.
946 do_select: force_purge = 0;
947 bind_me = NULL; /* Which session shall we handle? */
949 /* Initialize the fdset. */
953 begin_critical_section(S_SESSION_TABLE);
954 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
955 if (ptr->state == CON_IDLE) {
956 FD_SET(ptr->client_socket, &readfds);
957 if (ptr->client_socket > highest)
958 highest = ptr->client_socket;
960 if ((bind_me == NULL) && (ptr->state == CON_READY)) {
962 ptr->state = CON_EXECUTING;
965 end_critical_section(S_SESSION_TABLE);
967 if (bind_me) goto SKIP_SELECT;
969 /* If we got this far, it means that there are no sessions
970 * which a previous thread marked for attention, so we go
971 * ahead and get ready to select().
974 /* First, add the various master sockets to the fdset. */
975 for (serviceptr = ServiceHookTable; serviceptr != NULL;
976 serviceptr = serviceptr->next ) {
977 m = serviceptr->msock;
985 tv.tv_sec = 1; /* wake up every second if no input */
987 retval = select(highest + 1, &readfds, NULL, NULL, &tv);
990 if (time_to_die) return(NULL);
992 /* Now figure out who made this select() unblock.
993 * First, check for an error or exit condition.
996 if (errno == EBADF) {
997 lprintf(CTDL_NOTICE, "select() failed: (%s)\n",
1001 if (errno != EINTR) {
1002 lprintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1004 } else if (!time_to_die)
1008 /* Next, check to see if it's a new client connecting
1009 * on a master socket.
1011 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1012 serviceptr = serviceptr->next ) {
1014 if (FD_ISSET(serviceptr->msock, &readfds)) {
1015 ssock = accept(serviceptr->msock, NULL, 0);
1018 "citserver: accept(): %s\n",
1023 "New client socket %d\n",
1026 /* New context will be created already
1027 * set up in the CON_EXECUTING state.
1029 con = CreateNewContext();
1031 /* Assign new socket number to it. */
1032 con->client_socket = ssock;
1033 con->h_command_function =
1034 serviceptr->h_command_function;
1035 con->h_async_function =
1036 serviceptr->h_async_function;
1038 /* Determine whether local socket */
1039 if (serviceptr->sockpath != NULL)
1040 con->is_local_socket = 1;
1042 /* Set the SO_REUSEADDR socket option */
1044 setsockopt(ssock, SOL_SOCKET,
1048 become_session(con);
1050 serviceptr->h_greeting_function();
1051 become_session(NULL);
1052 con->state = CON_IDLE;
1058 /* It must be a client socket. Find a context that has data
1059 * waiting on its socket *and* is in the CON_IDLE state. Any
1060 * active sockets other than our chosen one are marked as
1061 * CON_READY so the next thread that comes around can just bind
1062 * to one without having to select() again.
1064 begin_critical_section(S_SESSION_TABLE);
1065 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1066 if ( (FD_ISSET(ptr->client_socket, &readfds))
1067 && (ptr->state != CON_EXECUTING) ) {
1068 ptr->input_waiting = 1;
1070 bind_me = ptr; /* I choose you! */
1071 bind_me->state = CON_EXECUTING;
1074 ptr->state = CON_READY;
1078 end_critical_section(S_SESSION_TABLE);
1081 /* We're bound to a session */
1082 if (bind_me != NULL) {
1083 become_session(bind_me);
1085 /* If the client has sent a command, execute it. */
1086 if (CC->input_waiting) {
1087 CC->h_command_function();
1088 CC->input_waiting = 0;
1091 /* If there are asynchronous messages waiting and the
1092 * client supports it, do those now */
1093 if ((CC->is_async) && (CC->async_waiting)
1094 && (CC->h_async_function != NULL)) {
1095 CC->h_async_function();
1096 CC->async_waiting = 0;
1099 force_purge = CC->kill_me;
1100 become_session(NULL);
1101 bind_me->state = CON_IDLE;
1104 dead_session_purge(force_purge);
1106 check_sched_shutdown();
1109 /* If control reaches this point, the server is shutting down */
1118 * Translate text facility name to syslog.h defined value.
1120 int SyslogFacility(char *name)
1129 { LOG_KERN, "kern" },
1130 { LOG_USER, "user" },
1131 { LOG_MAIL, "mail" },
1132 { LOG_DAEMON, "daemon" },
1133 { LOG_AUTH, "auth" },
1134 { LOG_SYSLOG, "syslog" },
1136 { LOG_NEWS, "news" },
1137 { LOG_UUCP, "uucp" },
1138 { LOG_LOCAL0, "local0" },
1139 { LOG_LOCAL1, "local1" },
1140 { LOG_LOCAL2, "local2" },
1141 { LOG_LOCAL3, "local3" },
1142 { LOG_LOCAL4, "local4" },
1143 { LOG_LOCAL5, "local5" },
1144 { LOG_LOCAL6, "local6" },
1145 { LOG_LOCAL7, "local7" },
1148 for(i = 0; facTbl[i].name != NULL; i++) {
1149 if(!strcasecmp(name, facTbl[i].name))
1150 return facTbl[i].facility;
1157 /********** MEM CHEQQER ***********/
1159 #ifdef DEBUG_MEMORY_LEAKS
1166 void *tracked_malloc(size_t size, char *file, int line) {
1167 struct igheap *thisheap;
1170 block = malloc(size);
1171 if (block == NULL) return(block);
1173 thisheap = malloc(sizeof(struct igheap));
1174 if (thisheap == NULL) {
1179 thisheap->block = block;
1180 strcpy(thisheap->file, file);
1181 thisheap->line = line;
1183 begin_critical_section(S_DEBUGMEMLEAKS);
1184 thisheap->next = igheap;
1186 end_critical_section(S_DEBUGMEMLEAKS);
1192 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1193 struct igheap *thisheap;
1196 block = realloc(ptr, size);
1197 if (block == NULL) return(block);
1199 thisheap = malloc(sizeof(struct igheap));
1200 if (thisheap == NULL) {
1205 thisheap->block = block;
1206 strcpy(thisheap->file, file);
1207 thisheap->line = line;
1209 begin_critical_section(S_DEBUGMEMLEAKS);
1210 thisheap->next = igheap;
1212 end_critical_section(S_DEBUGMEMLEAKS);
1219 void tracked_free(void *ptr) {
1220 struct igheap *thisheap;
1221 struct igheap *trash;
1225 if (igheap == NULL) return;
1226 begin_critical_section(S_DEBUGMEMLEAKS);
1227 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1228 if (thisheap->next != NULL) {
1229 if (thisheap->next->block == ptr) {
1230 trash = thisheap->next;
1231 thisheap->next = thisheap->next->next;
1236 if (igheap->block == ptr) {
1238 igheap = igheap->next;
1241 end_critical_section(S_DEBUGMEMLEAKS);
1244 char *tracked_strdup(const char *s, char *file, int line) {
1247 if (s == NULL) return(NULL);
1248 ptr = tracked_malloc(strlen(s) + 1, file, line);
1249 if (ptr == NULL) return(NULL);
1250 strncpy(ptr, s, strlen(s));
1254 void dump_heap(void) {
1255 struct igheap *thisheap;
1257 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1258 lprintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1259 thisheap->file, thisheap->line);
1263 #endif /* DEBUG_MEMORY_LEAKS */