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 extern int running_as_daemon;
108 static int enable_syslog = 1;
109 void lprintf(enum LogLevel loglevel, const char *format, ...) {
113 va_start(arg_ptr, format);
114 vsyslog(loglevel, format, arg_ptr);
118 /* stderr output code */
119 if (enable_syslog || running_as_daemon) return;
121 /* if we run in forground and syslog is disabled, log to terminal */
122 if (loglevel <= verbosity) {
127 gettimeofday(&tv, NULL);
128 /* Promote to time_t; types differ on some OSes (like darwin) */
129 unixtime = tv.tv_sec;
130 localtime_r(&unixtime, &tim);
131 if (CC->cs_pid != 0) {
133 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
134 tim.tm_year + 1900, tim.tm_mon + 1,
135 tim.tm_mday, tim.tm_hour, tim.tm_min,
136 tim.tm_sec, (long)tv.tv_usec,
140 "%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
141 tim.tm_year + 1900, tim.tm_mon + 1,
142 tim.tm_mday, tim.tm_hour, tim.tm_min,
143 tim.tm_sec, (long)tv.tv_usec);
145 va_start(arg_ptr, format);
146 vfprintf(stderr, format, arg_ptr);
155 * Signal handler to shut down the server.
158 volatile int time_to_die = 0;
160 static RETSIGTYPE signal_cleanup(int signum) {
161 lprintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
163 master_cleanup(signum);
168 * Some initialization stuff...
170 void init_sysdep(void) {
174 /* Avoid vulnerabilities related to FD_SETSIZE if we can. */
178 getrlimit(RLIMIT_NOFILE, &rl);
179 rl.rlim_cur = FD_SETSIZE;
180 rl.rlim_max = FD_SETSIZE;
181 setrlimit(RLIMIT_NOFILE, &rl);
185 /* If we've got OpenSSL, we're going to use it. */
190 /* Set up a bunch of semaphores to be used for critical sections */
191 for (i=0; i<MAX_SEMAPHORES; ++i) {
192 pthread_mutex_init(&Critters[i], NULL);
196 * Set up a place to put thread-specific data.
197 * We only need a single pointer per thread - it points to the
198 * CitContext structure (in the ContextList linked list) of the
199 * session to which the calling thread is currently bound.
201 if (pthread_key_create(&MyConKey, NULL) != 0) {
202 lprintf(CTDL_CRIT, "Can't create TSD key!! %s\n", strerror(errno));
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) {
315 lprintf(CTDL_EMERG, "citserver: Can't set socket to non-blocking: %s\n",
321 if (listen(s, actual_queue_len) < 0) {
322 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n", strerror(errno));
333 * Create a Unix domain socket and listen on it
335 int ig_uds_server(char *sockpath, int queue_len)
337 struct sockaddr_un addr;
340 int actual_queue_len;
342 actual_queue_len = queue_len;
343 if (actual_queue_len < 5) actual_queue_len = 5;
345 i = unlink(sockpath);
346 if (i != 0) if (errno != ENOENT) {
347 lprintf(CTDL_EMERG, "citserver: can't unlink %s: %s\n",
348 sockpath, strerror(errno));
352 memset(&addr, 0, sizeof(addr));
353 addr.sun_family = AF_UNIX;
354 safestrncpy(addr.sun_path, sockpath, sizeof addr.sun_path);
356 s = socket(AF_UNIX, SOCK_STREAM, 0);
358 lprintf(CTDL_EMERG, "citserver: Can't create a socket: %s\n",
363 if (bind(s, (struct sockaddr *)&addr, sizeof(addr)) < 0) {
364 lprintf(CTDL_EMERG, "citserver: Can't bind: %s\n",
369 /* set to nonblock - we need this for some obscure situations */
370 if (fcntl(s, F_SETFL, O_NONBLOCK) < 0) {
371 lprintf(CTDL_EMERG, "citserver: Can't set socket to non-blocking: %s\n",
377 if (listen(s, actual_queue_len) < 0) {
378 lprintf(CTDL_EMERG, "citserver: Can't listen: %s\n", strerror(errno));
382 chmod(sockpath, 0777);
389 * Return a pointer to the CitContext structure bound to the thread which
390 * called this function. If there's no such binding (for example, if it's
391 * called by the housekeeper thread) then a generic 'master' CC is returned.
393 * This function is used *VERY* frequently and must be kept small.
395 struct CitContext *MyContext(void) {
397 register struct CitContext *c;
399 return ((c = (struct CitContext *) pthread_getspecific(MyConKey),
400 c == NULL) ? &masterCC : c
406 * Initialize a new context and place it in the list. The session number
407 * used to be the PID (which is why it's called cs_pid), but that was when we
408 * had one process per session. Now we just assign them sequentially, starting
409 * at 1 (don't change it to 0 because masterCC uses 0) and re-using them when
410 * sessions terminate.
412 struct CitContext *CreateNewContext(void) {
413 struct CitContext *me;
414 static int next_pid = 0;
416 me = (struct CitContext *) malloc(sizeof(struct CitContext));
418 lprintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
421 memset(me, 0, sizeof(struct CitContext));
423 /* The new context will be created already in the CON_EXECUTING state
424 * in order to prevent another thread from grabbing it while it's
427 me->state = CON_EXECUTING;
431 * Generate a unique session number and insert this context into
434 begin_critical_section(S_SESSION_TABLE);
435 me->cs_pid = ++next_pid;
437 me->next = ContextList;
439 if (me->next != NULL) {
443 end_critical_section(S_SESSION_TABLE);
449 * The following functions implement output buffering. If the kernel supplies
450 * native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
451 * user-space buffering.
454 # define HAVE_TCP_BUFFERING
457 # define HAVE_TCP_BUFFERING
458 # define TCP_CORK TCP_NOPUSH
463 #ifdef HAVE_TCP_BUFFERING
464 static unsigned on = 1, off = 0;
465 void buffer_output(void) {
466 struct CitContext *ctx = MyContext();
467 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
471 void unbuffer_output(void) {
472 struct CitContext *ctx = MyContext();
473 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
477 void flush_output(void) {
478 struct CitContext *ctx = MyContext();
479 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
480 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
483 void buffer_output(void) {
484 if (CC->buffering == 0) {
487 CC->output_buffer = malloc(SIZ);
491 void flush_output(void) {
492 if (CC->buffering == 1) {
493 client_write(CC->output_buffer, CC->buffer_len);
498 void unbuffer_output(void) {
499 if (CC->buffering == 1) {
501 /* We don't call flush_output because we can't. */
502 client_write(CC->output_buffer, CC->buffer_len);
504 free(CC->output_buffer);
505 CC->output_buffer = NULL;
513 * client_write() ... Send binary data to the client.
515 void client_write(char *buf, int nbytes)
517 int bytes_written = 0;
519 #ifndef HAVE_TCP_BUFFERING
520 int old_buffer_len = 0;
523 if (CC->redirect_buffer != NULL) {
524 if ((CC->redirect_len + nbytes + 2) >= CC->redirect_alloc) {
525 CC->redirect_alloc = (CC->redirect_alloc * 2) + nbytes;
526 CC->redirect_buffer = realloc(CC->redirect_buffer,
529 memcpy(&CC->redirect_buffer[CC->redirect_len], buf, nbytes);
530 CC->redirect_len += nbytes;
531 CC->redirect_buffer[CC->redirect_len] = 0;
535 if (CC->redirect_fp != NULL) {
536 fwrite(buf, (size_t)nbytes, (size_t)1, CC->redirect_fp);
540 #ifndef HAVE_TCP_BUFFERING
541 /* If we're buffering for later, do that now. */
543 old_buffer_len = CC->buffer_len;
544 CC->buffer_len += nbytes;
545 CC->output_buffer = realloc(CC->output_buffer, CC->buffer_len);
546 memcpy(&CC->output_buffer[old_buffer_len], buf, nbytes);
551 /* Ok, at this point we're not buffering. Go ahead and write. */
554 if (CC->redirect_ssl) {
555 client_write_ssl(buf, nbytes);
560 while (bytes_written < nbytes) {
561 retval = write(CC->client_socket, &buf[bytes_written],
562 nbytes - bytes_written);
564 lprintf(CTDL_ERR, "client_write() failed: %s\n",
569 bytes_written = bytes_written + retval;
575 * cprintf() ... Send formatted printable data to the client. It is
576 * implemented in terms of client_write() but remains in
577 * sysdep.c in case we port to somewhere without va_args...
579 void cprintf(const char *format, ...) {
583 va_start(arg_ptr, format);
584 if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
585 buf[sizeof buf - 2] = '\n';
586 client_write(buf, strlen(buf));
592 * Read data from the client socket.
594 * 1 Requested number of bytes has been read.
595 * 0 Request timed out.
596 * -1 The socket is broken.
597 * If the socket breaks, the session will be terminated.
599 int client_read_to(char *buf, int bytes, int timeout)
607 if (CC->redirect_ssl) {
608 return (client_read_ssl(buf, bytes, timeout));
614 FD_SET(CC->client_socket, &rfds);
618 retval = select( (CC->client_socket)+1,
619 &rfds, NULL, NULL, &tv);
621 if (FD_ISSET(CC->client_socket, &rfds) == 0) {
625 rlen = read(CC->client_socket, &buf[len], bytes-len);
627 lprintf(CTDL_ERR, "client_read() failed: %s\n",
638 * Read data from the client socket with default timeout.
639 * (This is implemented in terms of client_read_to() and could be
640 * justifiably moved out of sysdep.c)
642 INLINE int client_read(char *buf, int bytes)
644 return(client_read_to(buf, bytes, config.c_sleeping));
649 * client_getln() ... Get a LF-terminated line of text from the client.
650 * (This is implemented in terms of client_read() and could be
651 * justifiably moved out of sysdep.c)
653 int client_getln(char *buf, int bufsize)
657 /* Read one character at a time.
660 retval = client_read(&buf[i], 1);
661 if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
665 /* If we got a long line, discard characters until the newline.
667 if (i == (bufsize-1))
668 while (buf[i] != '\n' && retval == 1)
669 retval = client_read(&buf[i], 1);
671 /* Strip the trailing newline and any trailing nonprintables (cr's)
674 while ((strlen(buf)>0)&&(!isprint(buf[strlen(buf)-1])))
675 buf[strlen(buf)-1] = 0;
676 if (retval < 0) strcpy(buf, "000");
683 * The system-dependent part of master_cleanup() - close the master socket.
685 void sysdep_master_cleanup(void) {
686 struct ServiceFunctionHook *serviceptr;
689 * close all protocol master sockets
691 for (serviceptr = ServiceHookTable; serviceptr != NULL;
692 serviceptr = serviceptr->next ) {
694 if (serviceptr->tcp_port > 0)
695 lprintf(CTDL_INFO, "Closing listener on port %d\n",
696 serviceptr->tcp_port);
698 if (serviceptr->sockpath != NULL)
699 lprintf(CTDL_INFO, "Closing listener on '%s'\n",
700 serviceptr->sockpath);
702 close(serviceptr->msock);
704 /* If it's a Unix domain socket, remove the file. */
705 if (serviceptr->sockpath != NULL) {
706 unlink(serviceptr->sockpath);
713 * Terminate another session.
714 * (This could justifiably be moved out of sysdep.c because it
715 * no longer does anything that is system-dependent.)
717 void kill_session(int session_to_kill) {
718 struct CitContext *ptr;
720 begin_critical_section(S_SESSION_TABLE);
721 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
722 if (ptr->cs_pid == session_to_kill) {
726 end_critical_section(S_SESSION_TABLE);
733 * Start running as a daemon.
735 void start_daemon(int unused) {
736 close(0); close(1); close(2);
739 signal(SIGHUP,SIG_IGN);
740 signal(SIGINT,SIG_IGN);
741 signal(SIGQUIT,SIG_IGN);
747 * Generic routine to convert a login name to a full name (gecos)
748 * Returns nonzero if a conversion took place
750 int convert_login(char NameToConvert[]) {
754 pw = getpwnam(NameToConvert);
759 strcpy(NameToConvert, pw->pw_gecos);
760 for (a=0; a<strlen(NameToConvert); ++a) {
761 if (NameToConvert[a] == ',') NameToConvert[a] = 0;
767 struct worker_node *worker_list = NULL;
771 * create a worker thread. this function must always be called from within
772 * an S_WORKER_LIST critical section!
774 void create_worker(void) {
776 struct worker_node *n;
779 n = malloc(sizeof(struct worker_node));
781 lprintf(CTDL_EMERG, "can't allocate worker_node, exiting\n");
786 if ((ret = pthread_attr_init(&attr))) {
787 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
792 /* Our per-thread stacks need to be bigger than the default size, otherwise
793 * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
796 if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
797 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n", strerror(ret));
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);
818 * Purge all sessions which have the 'kill_me' flag set.
819 * This function has code to prevent it from running more than once every
820 * few seconds, because running it after every single unbind would waste a lot
821 * of CPU time and keep the context list locked too much. To force it to run
822 * anyway, set "force" to nonzero.
825 * After that's done, we raise the size of the worker thread pool
826 * if such an action is appropriate.
828 void dead_session_purge(int force) {
829 struct CitContext *ptr, *rem;
832 if ( (time(NULL) - last_purge) < 5 ) {
833 return; /* Too soon, go away */
840 begin_critical_section(S_SESSION_TABLE);
841 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
842 if ( (ptr->state == CON_IDLE) && (ptr->kill_me) ) {
846 end_critical_section(S_SESSION_TABLE);
848 /* RemoveContext() enters its own S_SESSION_TABLE critical
849 * section, so we have to do it like this.
852 lprintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
856 } while (rem != NULL);
858 /* Raise the size of the worker thread pool if necessary. */
860 if ( (num_sessions > num_threads)
861 && (num_threads < config.c_max_workers) ) {
862 begin_critical_section(S_WORKER_LIST);
864 end_critical_section(S_WORKER_LIST);
873 * Redirect a session's output to a file.
874 * This function may be called with a file handle.
875 * Call with NULL to return output to its normal client socket.
877 void CtdlRedirectOutput(FILE *fp)
879 if (fp != NULL) CC->redirect_fp = fp;
880 else CC->redirect_fp = NULL;
885 * masterCC is the context we use when not attached to a session. This
886 * function initializes it.
888 void InitializeMasterCC(void) {
889 memset(&masterCC, 0, sizeof(struct CitContext));
890 masterCC.internal_pgm = 1;
900 * Bind a thread to a context. (It's inline merely to speed things up.)
902 INLINE void become_session(struct CitContext *which_con) {
903 pthread_setspecific(MyConKey, (void *)which_con );
909 * This loop just keeps going and going and going...
911 void *worker_thread(void *arg) {
914 struct CitContext *ptr;
915 struct CitContext *bind_me = NULL;
918 struct CitContext *con= NULL; /* Temporary context pointer */
919 struct ServiceFunctionHook *serviceptr;
920 int ssock; /* Descriptor for client socket */
929 while (!time_to_die) {
931 /* make doubly sure we're not holding any stale db handles
932 * which might cause a deadlock.
935 do_select: force_purge = 0;
936 bind_me = NULL; /* Which session shall we handle? */
938 /* Initialize the fdset. */
942 begin_critical_section(S_SESSION_TABLE);
943 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
944 if (ptr->state == CON_IDLE) {
945 FD_SET(ptr->client_socket, &readfds);
946 if (ptr->client_socket > highest)
947 highest = ptr->client_socket;
949 if ((bind_me == NULL) && (ptr->state == CON_READY)) {
951 ptr->state = CON_EXECUTING;
954 end_critical_section(S_SESSION_TABLE);
960 /* If we got this far, it means that there are no sessions
961 * which a previous thread marked for attention, so we go
962 * ahead and get ready to select().
965 /* First, add the various master sockets to the fdset. */
966 for (serviceptr = ServiceHookTable; serviceptr != NULL;
967 serviceptr = serviceptr->next ) {
968 m = serviceptr->msock;
976 tv.tv_sec = 1; /* wake up every second if no input */
978 retval = select(highest + 1, &readfds, NULL, NULL, &tv);
981 if (time_to_die) return(NULL);
983 /* Now figure out who made this select() unblock.
984 * First, check for an error or exit condition.
987 if (errno == EBADF) {
988 lprintf(CTDL_NOTICE, "select() failed: (%s)\n",
992 if (errno != EINTR) {
993 lprintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
995 } else if (!time_to_die)
999 /* Next, check to see if it's a new client connecting
1000 * on a master socket.
1002 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1003 serviceptr = serviceptr->next ) {
1005 if (FD_ISSET(serviceptr->msock, &readfds)) {
1006 ssock = accept(serviceptr->msock, NULL, 0);
1009 "New client socket %d\n",
1012 /* New context will be created already
1013 * set up in the CON_EXECUTING state.
1015 con = CreateNewContext();
1017 /* Assign new socket number to it. */
1018 con->client_socket = ssock;
1019 con->h_command_function =
1020 serviceptr->h_command_function;
1021 con->h_async_function =
1022 serviceptr->h_async_function;
1024 /* Determine whether local socket */
1025 if (serviceptr->sockpath != NULL)
1026 con->is_local_socket = 1;
1028 /* Set the SO_REUSEADDR socket option */
1030 setsockopt(ssock, SOL_SOCKET,
1034 become_session(con);
1036 serviceptr->h_greeting_function();
1037 become_session(NULL);
1038 con->state = CON_IDLE;
1044 /* It must be a client socket. Find a context that has data
1045 * waiting on its socket *and* is in the CON_IDLE state. Any
1046 * active sockets other than our chosen one are marked as
1047 * CON_READY so the next thread that comes around can just bind
1048 * to one without having to select() again.
1050 begin_critical_section(S_SESSION_TABLE);
1051 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1052 if ( (FD_ISSET(ptr->client_socket, &readfds))
1053 && (ptr->state != CON_EXECUTING) ) {
1054 ptr->input_waiting = 1;
1056 bind_me = ptr; /* I choose you! */
1057 bind_me->state = CON_EXECUTING;
1060 ptr->state = CON_READY;
1064 end_critical_section(S_SESSION_TABLE);
1067 /* We're bound to a session */
1068 if (bind_me != NULL) {
1069 become_session(bind_me);
1071 /* If the client has sent a command, execute it. */
1072 if (CC->input_waiting) {
1073 CC->h_command_function();
1074 CC->input_waiting = 0;
1077 /* If there are asynchronous messages waiting and the
1078 * client supports it, do those now */
1079 if ((CC->is_async) && (CC->async_waiting)
1080 && (CC->h_async_function != NULL)) {
1081 CC->h_async_function();
1082 CC->async_waiting = 0;
1085 force_purge = CC->kill_me;
1086 become_session(NULL);
1087 bind_me->state = CON_IDLE;
1090 dead_session_purge(force_purge);
1092 check_sched_shutdown();
1095 /* If control reaches this point, the server is shutting down */
1104 * Translate text facility name to syslog.h defined value.
1106 int SyslogFacility(char *name)
1115 { LOG_KERN, "kern" },
1116 { LOG_USER, "user" },
1117 { LOG_MAIL, "mail" },
1118 { LOG_DAEMON, "daemon" },
1119 { LOG_AUTH, "auth" },
1120 { LOG_SYSLOG, "syslog" },
1122 { LOG_NEWS, "news" },
1123 { LOG_UUCP, "uucp" },
1124 { LOG_LOCAL0, "local0" },
1125 { LOG_LOCAL1, "local1" },
1126 { LOG_LOCAL2, "local2" },
1127 { LOG_LOCAL3, "local3" },
1128 { LOG_LOCAL4, "local4" },
1129 { LOG_LOCAL5, "local5" },
1130 { LOG_LOCAL6, "local6" },
1131 { LOG_LOCAL7, "local7" },
1134 for(i = 0; facTbl[i].name != NULL; i++) {
1135 if(!strcasecmp(name, facTbl[i].name))
1136 return facTbl[i].facility;
1143 /********** MEM CHEQQER ***********/
1145 #ifdef DEBUG_MEMORY_LEAKS
1152 void *tracked_malloc(size_t size, char *file, int line) {
1153 struct igheap *thisheap;
1156 block = malloc(size);
1157 if (block == NULL) return(block);
1159 thisheap = malloc(sizeof(struct igheap));
1160 if (thisheap == NULL) {
1165 thisheap->block = block;
1166 strcpy(thisheap->file, file);
1167 thisheap->line = line;
1169 begin_critical_section(S_DEBUGMEMLEAKS);
1170 thisheap->next = igheap;
1172 end_critical_section(S_DEBUGMEMLEAKS);
1178 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1179 struct igheap *thisheap;
1182 block = realloc(ptr, size);
1183 if (block == NULL) return(block);
1185 thisheap = malloc(sizeof(struct igheap));
1186 if (thisheap == NULL) {
1191 thisheap->block = block;
1192 strcpy(thisheap->file, file);
1193 thisheap->line = line;
1195 begin_critical_section(S_DEBUGMEMLEAKS);
1196 thisheap->next = igheap;
1198 end_critical_section(S_DEBUGMEMLEAKS);
1205 void tracked_free(void *ptr) {
1206 struct igheap *thisheap;
1207 struct igheap *trash;
1211 if (igheap == NULL) return;
1212 begin_critical_section(S_DEBUGMEMLEAKS);
1213 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1214 if (thisheap->next != NULL) {
1215 if (thisheap->next->block == ptr) {
1216 trash = thisheap->next;
1217 thisheap->next = thisheap->next->next;
1222 if (igheap->block == ptr) {
1224 igheap = igheap->next;
1227 end_critical_section(S_DEBUGMEMLEAKS);
1230 char *tracked_strdup(const char *s, char *file, int line) {
1233 if (s == NULL) return(NULL);
1234 ptr = tracked_malloc(strlen(s) + 1, file, line);
1235 if (ptr == NULL) return(NULL);
1236 strncpy(ptr, s, strlen(s));
1240 void dump_heap(void) {
1241 struct igheap *thisheap;
1243 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1244 lprintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1245 thisheap->file, thisheap->line);
1249 #endif /* DEBUG_MEMORY_LEAKS */