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);
102 int enable_syslog = 0;
103 extern int running_as_daemon;
106 * lprintf() ... Write logging information
108 void lprintf(enum LogLevel loglevel, const char *format, ...) {
112 va_start(arg_ptr, format);
113 vsyslog(loglevel, format, arg_ptr);
117 /* stderr output code */
118 if (enable_syslog || running_as_daemon) return;
120 /* if we run in forground and syslog is disabled, log to terminal */
121 if (loglevel <= verbosity) {
126 gettimeofday(&tv, NULL);
127 /* Promote to time_t; types differ on some OSes (like darwin) */
128 unixtime = tv.tv_sec;
129 localtime_r(&unixtime, &tim);
130 if (CC->cs_pid != 0) {
132 "%04d/%02d/%02d %2d:%02d:%02d.%06ld [%3d] ",
133 tim.tm_year + 1900, tim.tm_mon + 1,
134 tim.tm_mday, tim.tm_hour, tim.tm_min,
135 tim.tm_sec, (long)tv.tv_usec,
139 "%04d/%02d/%02d %2d:%02d:%02d.%06ld ",
140 tim.tm_year + 1900, tim.tm_mon + 1,
141 tim.tm_mday, tim.tm_hour, tim.tm_min,
142 tim.tm_sec, (long)tv.tv_usec);
144 va_start(arg_ptr, format);
145 vfprintf(stderr, format, arg_ptr);
154 * Signal handler to shut down the server.
157 volatile int time_to_die = 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) and re-using them when
414 * sessions terminate.
416 struct CitContext *CreateNewContext(void) {
417 struct CitContext *me;
418 static int next_pid = 0;
420 me = (struct CitContext *) malloc(sizeof(struct CitContext));
422 lprintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
425 memset(me, 0, sizeof(struct CitContext));
427 /* The new context will be created already in the CON_EXECUTING state
428 * in order to prevent another thread from grabbing it while it's
431 me->state = CON_EXECUTING;
434 * Generate a unique session number and insert this context into
437 begin_critical_section(S_SESSION_TABLE);
438 me->cs_pid = ++next_pid;
440 me->next = ContextList;
442 if (me->next != NULL) {
446 end_critical_section(S_SESSION_TABLE);
452 * The following functions implement output buffering. If the kernel supplies
453 * native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
454 * user-space buffering.
457 # define HAVE_TCP_BUFFERING
460 # define HAVE_TCP_BUFFERING
461 # define TCP_CORK TCP_NOPUSH
466 #ifdef HAVE_TCP_BUFFERING
467 static unsigned on = 1, off = 0;
468 void buffer_output(void) {
469 struct CitContext *ctx = MyContext();
470 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
474 void unbuffer_output(void) {
475 struct CitContext *ctx = MyContext();
476 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
480 void flush_output(void) {
481 struct CitContext *ctx = MyContext();
482 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
483 setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
486 void buffer_output(void) {
487 if (CC->buffering == 0) {
490 CC->output_buffer = malloc(SIZ);
494 void flush_output(void) {
495 if (CC->buffering == 1) {
496 client_write(CC->output_buffer, CC->buffer_len);
501 void unbuffer_output(void) {
502 if (CC->buffering == 1) {
504 /* We don't call flush_output because we can't. */
505 client_write(CC->output_buffer, CC->buffer_len);
507 free(CC->output_buffer);
508 CC->output_buffer = NULL;
516 * client_write() ... Send binary data to the client.
518 void client_write(char *buf, int nbytes)
520 int bytes_written = 0;
522 #ifndef HAVE_TCP_BUFFERING
523 int old_buffer_len = 0;
526 if (CC->redirect_buffer != NULL) {
527 if ((CC->redirect_len + nbytes + 2) >= CC->redirect_alloc) {
528 CC->redirect_alloc = (CC->redirect_alloc * 2) + nbytes;
529 CC->redirect_buffer = realloc(CC->redirect_buffer,
532 memcpy(&CC->redirect_buffer[CC->redirect_len], buf, nbytes);
533 CC->redirect_len += nbytes;
534 CC->redirect_buffer[CC->redirect_len] = 0;
538 if (CC->redirect_fp != NULL) {
539 fwrite(buf, (size_t)nbytes, (size_t)1, CC->redirect_fp);
543 #ifndef HAVE_TCP_BUFFERING
544 /* If we're buffering for later, do that now. */
546 old_buffer_len = CC->buffer_len;
547 CC->buffer_len += nbytes;
548 CC->output_buffer = realloc(CC->output_buffer, CC->buffer_len);
549 memcpy(&CC->output_buffer[old_buffer_len], buf, nbytes);
554 /* Ok, at this point we're not buffering. Go ahead and write. */
557 if (CC->redirect_ssl) {
558 client_write_ssl(buf, nbytes);
563 while (bytes_written < nbytes) {
564 retval = write(CC->client_socket, &buf[bytes_written],
565 nbytes - bytes_written);
567 lprintf(CTDL_ERR, "client_write() failed: %s\n",
572 bytes_written = bytes_written + retval;
578 * cprintf() ... Send formatted printable data to the client. It is
579 * implemented in terms of client_write() but remains in
580 * sysdep.c in case we port to somewhere without va_args...
582 void cprintf(const char *format, ...) {
586 va_start(arg_ptr, format);
587 if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
588 buf[sizeof buf - 2] = '\n';
589 client_write(buf, strlen(buf));
595 * Read data from the client socket.
597 * 1 Requested number of bytes has been read.
598 * 0 Request timed out.
599 * -1 The socket is broken.
600 * If the socket breaks, the session will be terminated.
602 int client_read_to(char *buf, int bytes, int timeout)
610 if (CC->redirect_ssl) {
611 return (client_read_ssl(buf, bytes, timeout));
617 FD_SET(CC->client_socket, &rfds);
621 retval = select( (CC->client_socket)+1,
622 &rfds, NULL, NULL, &tv);
624 if (FD_ISSET(CC->client_socket, &rfds) == 0) {
628 rlen = read(CC->client_socket, &buf[len], bytes-len);
630 lprintf(CTDL_ERR, "client_read() failed: %s\n",
641 * Read data from the client socket with default timeout.
642 * (This is implemented in terms of client_read_to() and could be
643 * justifiably moved out of sysdep.c)
645 INLINE int client_read(char *buf, int bytes)
647 return(client_read_to(buf, bytes, config.c_sleeping));
652 * client_getln() ... Get a LF-terminated line of text from the client.
653 * (This is implemented in terms of client_read() and could be
654 * justifiably moved out of sysdep.c)
656 int client_getln(char *buf, int bufsize)
660 /* Read one character at a time.
663 retval = client_read(&buf[i], 1);
664 if (retval != 1 || buf[i] == '\n' || i == (bufsize-1))
668 /* If we got a long line, discard characters until the newline.
670 if (i == (bufsize-1))
671 while (buf[i] != '\n' && retval == 1)
672 retval = client_read(&buf[i], 1);
674 /* Strip the trailing newline and any trailing nonprintables (cr's)
677 while ((strlen(buf)>0)&&(!isprint(buf[strlen(buf)-1])))
678 buf[strlen(buf)-1] = 0;
679 if (retval < 0) safestrncpy(buf, "000", bufsize);
686 * The system-dependent part of master_cleanup() - close the master socket.
688 void sysdep_master_cleanup(void) {
689 struct ServiceFunctionHook *serviceptr;
692 * close all protocol master sockets
694 for (serviceptr = ServiceHookTable; serviceptr != NULL;
695 serviceptr = serviceptr->next ) {
697 if (serviceptr->tcp_port > 0)
698 lprintf(CTDL_INFO, "Closing listener on port %d\n",
699 serviceptr->tcp_port);
701 if (serviceptr->sockpath != NULL)
702 lprintf(CTDL_INFO, "Closing listener on '%s'\n",
703 serviceptr->sockpath);
705 close(serviceptr->msock);
707 /* If it's a Unix domain socket, remove the file. */
708 if (serviceptr->sockpath != NULL) {
709 unlink(serviceptr->sockpath);
716 * Terminate another session.
717 * (This could justifiably be moved out of sysdep.c because it
718 * no longer does anything that is system-dependent.)
720 void kill_session(int session_to_kill) {
721 struct CitContext *ptr;
723 begin_critical_section(S_SESSION_TABLE);
724 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
725 if (ptr->cs_pid == session_to_kill) {
729 end_critical_section(S_SESSION_TABLE);
736 * Start running as a daemon.
738 void start_daemon(int unused) {
739 close(0); close(1); close(2);
742 signal(SIGHUP,SIG_IGN);
743 signal(SIGINT,SIG_IGN);
744 signal(SIGQUIT,SIG_IGN);
750 * Generic routine to convert a login name to a full name (gecos)
751 * Returns nonzero if a conversion took place
753 int convert_login(char NameToConvert[]) {
757 pw = getpwnam(NameToConvert);
762 strcpy(NameToConvert, pw->pw_gecos);
763 for (a=0; a<strlen(NameToConvert); ++a) {
764 if (NameToConvert[a] == ',') NameToConvert[a] = 0;
770 struct worker_node *worker_list = NULL;
774 * create a worker thread. this function must always be called from within
775 * an S_WORKER_LIST critical section!
777 void create_worker(void) {
779 struct worker_node *n;
782 n = malloc(sizeof(struct worker_node));
784 lprintf(CTDL_EMERG, "can't allocate worker_node, exiting\n");
789 if ((ret = pthread_attr_init(&attr))) {
790 lprintf(CTDL_EMERG, "pthread_attr_init: %s\n", strerror(ret));
795 /* Our per-thread stacks need to be bigger than the default size, otherwise
796 * the MIME parser crashes on FreeBSD, and the IMAP service crashes on
799 if ((ret = pthread_attr_setstacksize(&attr, 1024 * 1024))) {
800 lprintf(CTDL_EMERG, "pthread_attr_setstacksize: %s\n", strerror(ret));
802 pthread_attr_destroy(&attr);
806 if ((ret = pthread_create(&n->tid, &attr, worker_thread, NULL) != 0))
809 lprintf(CTDL_ALERT, "Can't create worker thread: %s\n",
813 n->next = worker_list;
815 pthread_attr_destroy(&attr);
821 * Purge all sessions which have the 'kill_me' flag set.
822 * This function has code to prevent it from running more than once every
823 * few seconds, because running it after every single unbind would waste a lot
824 * of CPU time and keep the context list locked too much. To force it to run
825 * anyway, set "force" to nonzero.
828 * After that's done, we raise the size of the worker thread pool
829 * if such an action is appropriate.
831 void dead_session_purge(int force) {
832 struct CitContext *ptr; /* general-purpose utility pointer */
833 struct CitContext *rem = NULL; /* list of sessions to be destroyed */
836 if ( (time(NULL) - last_purge) < 5 ) {
837 return; /* Too soon, go away */
842 begin_critical_section(S_SESSION_TABLE);
843 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
844 if ( (ptr->state == CON_IDLE) && (ptr->kill_me) ) {
846 /* Remove the session from the active list */
848 ptr->prev->next = ptr->next;
851 ContextList = ptr->next;
854 ptr->next->prev = ptr->prev;
859 /* And put it on our to-be-destroyed list */
865 end_critical_section(S_SESSION_TABLE);
867 /* Now that we no longer have the session list locked, we can take
868 * our time and destroy any sessions on the to-be-killed list, which
869 * is allocated privately on this thread's stack.
871 while (rem != NULL) {
872 lprintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
879 /* Raise the size of the worker thread pool if necessary. */
880 if ( (num_sessions > num_threads)
881 && (num_threads < config.c_max_workers) ) {
882 begin_critical_section(S_WORKER_LIST);
884 end_critical_section(S_WORKER_LIST);
893 * Redirect a session's output to a file.
894 * This function may be called with a file handle.
895 * Call with NULL to return output to its normal client socket.
897 void CtdlRedirectOutput(FILE *fp)
899 if (fp != NULL) CC->redirect_fp = fp;
900 else CC->redirect_fp = NULL;
905 * masterCC is the context we use when not attached to a session. This
906 * function initializes it.
908 void InitializeMasterCC(void) {
909 memset(&masterCC, 0, sizeof(struct CitContext));
910 masterCC.internal_pgm = 1;
920 * Bind a thread to a context. (It's inline merely to speed things up.)
922 INLINE void become_session(struct CitContext *which_con) {
923 pthread_setspecific(MyConKey, (void *)which_con );
929 * This loop just keeps going and going and going...
931 void *worker_thread(void *arg) {
934 struct CitContext *ptr;
935 struct CitContext *bind_me = NULL;
938 struct CitContext *con= NULL; /* Temporary context pointer */
939 struct ServiceFunctionHook *serviceptr;
940 int ssock; /* Descriptor for client socket */
949 while (!time_to_die) {
951 /* make doubly sure we're not holding any stale db handles
952 * which might cause a deadlock.
955 do_select: force_purge = 0;
956 bind_me = NULL; /* Which session shall we handle? */
958 /* Initialize the fdset. */
962 begin_critical_section(S_SESSION_TABLE);
963 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
964 if (ptr->state == CON_IDLE) {
965 FD_SET(ptr->client_socket, &readfds);
966 if (ptr->client_socket > highest)
967 highest = ptr->client_socket;
969 if ((bind_me == NULL) && (ptr->state == CON_READY)) {
971 ptr->state = CON_EXECUTING;
974 end_critical_section(S_SESSION_TABLE);
980 /* If we got this far, it means that there are no sessions
981 * which a previous thread marked for attention, so we go
982 * ahead and get ready to select().
985 /* First, add the various master sockets to the fdset. */
986 for (serviceptr = ServiceHookTable; serviceptr != NULL;
987 serviceptr = serviceptr->next ) {
988 m = serviceptr->msock;
996 tv.tv_sec = 1; /* wake up every second if no input */
998 retval = select(highest + 1, &readfds, NULL, NULL, &tv);
1001 if (time_to_die) return(NULL);
1003 /* Now figure out who made this select() unblock.
1004 * First, check for an error or exit condition.
1007 if (errno == EBADF) {
1008 lprintf(CTDL_NOTICE, "select() failed: (%s)\n",
1012 if (errno != EINTR) {
1013 lprintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
1015 } else if (!time_to_die)
1019 /* Next, check to see if it's a new client connecting
1020 * on a master socket.
1022 else for (serviceptr = ServiceHookTable; serviceptr != NULL;
1023 serviceptr = serviceptr->next ) {
1025 if (FD_ISSET(serviceptr->msock, &readfds)) {
1026 ssock = accept(serviceptr->msock, NULL, 0);
1029 "New client socket %d\n",
1032 /* New context will be created already
1033 * set up in the CON_EXECUTING state.
1035 con = CreateNewContext();
1037 /* Assign new socket number to it. */
1038 con->client_socket = ssock;
1039 con->h_command_function =
1040 serviceptr->h_command_function;
1041 con->h_async_function =
1042 serviceptr->h_async_function;
1044 /* Determine whether local socket */
1045 if (serviceptr->sockpath != NULL)
1046 con->is_local_socket = 1;
1048 /* Set the SO_REUSEADDR socket option */
1050 setsockopt(ssock, SOL_SOCKET,
1054 become_session(con);
1056 serviceptr->h_greeting_function();
1057 become_session(NULL);
1058 con->state = CON_IDLE;
1064 /* It must be a client socket. Find a context that has data
1065 * waiting on its socket *and* is in the CON_IDLE state. Any
1066 * active sockets other than our chosen one are marked as
1067 * CON_READY so the next thread that comes around can just bind
1068 * to one without having to select() again.
1070 begin_critical_section(S_SESSION_TABLE);
1071 for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
1072 if ( (FD_ISSET(ptr->client_socket, &readfds))
1073 && (ptr->state != CON_EXECUTING) ) {
1074 ptr->input_waiting = 1;
1076 bind_me = ptr; /* I choose you! */
1077 bind_me->state = CON_EXECUTING;
1080 ptr->state = CON_READY;
1084 end_critical_section(S_SESSION_TABLE);
1087 /* We're bound to a session */
1088 if (bind_me != NULL) {
1089 become_session(bind_me);
1091 /* If the client has sent a command, execute it. */
1092 if (CC->input_waiting) {
1093 CC->h_command_function();
1094 CC->input_waiting = 0;
1097 /* If there are asynchronous messages waiting and the
1098 * client supports it, do those now */
1099 if ((CC->is_async) && (CC->async_waiting)
1100 && (CC->h_async_function != NULL)) {
1101 CC->h_async_function();
1102 CC->async_waiting = 0;
1105 force_purge = CC->kill_me;
1106 become_session(NULL);
1107 bind_me->state = CON_IDLE;
1110 dead_session_purge(force_purge);
1112 check_sched_shutdown();
1115 /* If control reaches this point, the server is shutting down */
1124 * Translate text facility name to syslog.h defined value.
1126 int SyslogFacility(char *name)
1135 { LOG_KERN, "kern" },
1136 { LOG_USER, "user" },
1137 { LOG_MAIL, "mail" },
1138 { LOG_DAEMON, "daemon" },
1139 { LOG_AUTH, "auth" },
1140 { LOG_SYSLOG, "syslog" },
1142 { LOG_NEWS, "news" },
1143 { LOG_UUCP, "uucp" },
1144 { LOG_LOCAL0, "local0" },
1145 { LOG_LOCAL1, "local1" },
1146 { LOG_LOCAL2, "local2" },
1147 { LOG_LOCAL3, "local3" },
1148 { LOG_LOCAL4, "local4" },
1149 { LOG_LOCAL5, "local5" },
1150 { LOG_LOCAL6, "local6" },
1151 { LOG_LOCAL7, "local7" },
1154 for(i = 0; facTbl[i].name != NULL; i++) {
1155 if(!strcasecmp(name, facTbl[i].name))
1156 return facTbl[i].facility;
1163 /********** MEM CHEQQER ***********/
1165 #ifdef DEBUG_MEMORY_LEAKS
1172 void *tracked_malloc(size_t size, char *file, int line) {
1173 struct igheap *thisheap;
1176 block = malloc(size);
1177 if (block == NULL) return(block);
1179 thisheap = malloc(sizeof(struct igheap));
1180 if (thisheap == NULL) {
1185 thisheap->block = block;
1186 strcpy(thisheap->file, file);
1187 thisheap->line = line;
1189 begin_critical_section(S_DEBUGMEMLEAKS);
1190 thisheap->next = igheap;
1192 end_critical_section(S_DEBUGMEMLEAKS);
1198 void *tracked_realloc(void *ptr, size_t size, char *file, int line) {
1199 struct igheap *thisheap;
1202 block = realloc(ptr, size);
1203 if (block == NULL) return(block);
1205 thisheap = malloc(sizeof(struct igheap));
1206 if (thisheap == NULL) {
1211 thisheap->block = block;
1212 strcpy(thisheap->file, file);
1213 thisheap->line = line;
1215 begin_critical_section(S_DEBUGMEMLEAKS);
1216 thisheap->next = igheap;
1218 end_critical_section(S_DEBUGMEMLEAKS);
1225 void tracked_free(void *ptr) {
1226 struct igheap *thisheap;
1227 struct igheap *trash;
1231 if (igheap == NULL) return;
1232 begin_critical_section(S_DEBUGMEMLEAKS);
1233 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1234 if (thisheap->next != NULL) {
1235 if (thisheap->next->block == ptr) {
1236 trash = thisheap->next;
1237 thisheap->next = thisheap->next->next;
1242 if (igheap->block == ptr) {
1244 igheap = igheap->next;
1247 end_critical_section(S_DEBUGMEMLEAKS);
1250 char *tracked_strdup(const char *s, char *file, int line) {
1253 if (s == NULL) return(NULL);
1254 ptr = tracked_malloc(strlen(s) + 1, file, line);
1255 if (ptr == NULL) return(NULL);
1256 strncpy(ptr, s, strlen(s));
1260 void dump_heap(void) {
1261 struct igheap *thisheap;
1263 for (thisheap = igheap; thisheap != NULL; thisheap = thisheap->next) {
1264 lprintf(CTDL_CRIT, "UNFREED: %30s : %d\n",
1265 thisheap->file, thisheap->line);
1269 #endif /* DEBUG_MEMORY_LEAKS */