Moved all threading code into threads.c
[citadel.git] / citadel / citserver.c
index 54e57695dad4f037396fe53cbd0cda2c5747a031..e1b2135f7aec14d5cf1f14f82a13e727e8547fd5 100644 (file)
 # endif
 #endif
 
+#if HAVE_BACKTRACE
+#include <execinfo.h>
+#endif
+
 #include <ctype.h>
 #include <string.h>
 #include <dirent.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
+#include <libcitadel.h>
 #include "citadel.h"
 #include "server.h"
-#include "serv_extensions.h"
 #include "sysdep_decls.h"
+#include "threads.h"
 #include "citserver.h"
 #include "config.h"
 #include "database.h"
 #include "file_ops.h"
 #include "policy.h"
 #include "control.h"
-#include "tools.h"
 #include "euidindex.h"
 
 #ifndef HAVE_SNPRINTF
 #include "snprintf.h"
 #endif
 
+#include "ctdl_module.h"
+
+
 struct CitContext *ContextList = NULL;
 struct CitContext* next_session = NULL;
 char *unique_session_numbers;
 int ScheduledShutdown = 0;
 int do_defrag = 0;
 time_t server_startup_time;
-char pid_file_name[PATH_MAX];
+int panic_fd;
+
+/**
+ * \brief print the actual stack frame.
+ */
+void cit_backtrace(void)
+{
+#ifdef HAVE_BACKTRACE
+       void *stack_frames[50];
+       size_t size, i;
+       char **strings;
+
+
+       size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
+       strings = backtrace_symbols(stack_frames, size);
+       for (i = 0; i < size; i++) {
+               if (strings != NULL)
+                       lprintf(1, "%s\n", strings[i]);
+               else
+                       lprintf(1, "%p\n", stack_frames[i]);
+       }
+       free(strings);
+#endif
+}
+
+/**
+ * \brief print the actual stack frame.
+ */
+void cit_panic_backtrace(int SigNum)
+{
+#ifdef HAVE_BACKTRACE
+       void *stack_frames[10];
+       size_t size, i;
+       char **strings;
+
+       printf("caught signal 11\n");
+       size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
+       strings = backtrace_symbols(stack_frames, size);
+       for (i = 0; i < size; i++) {
+               if (strings != NULL)
+                       lprintf(1, "%s\n", strings[i]);
+               else
+                       lprintf(1, "%p\n", stack_frames[i]);
+       }
+       free(strings);
+#endif
+       exit(-1);
+}
 
 /*
  * Various things that need to be initialized at startup
@@ -75,22 +129,17 @@ void master_startup(void) {
        unsigned int seed;
        FILE *urandom;
        struct ctdlroom qrbuf;
-       FILE *pidfile_fp;
        
        lprintf(CTDL_DEBUG, "master_startup() started\n");
        time(&server_startup_time);
 
-       /* pid file.  If we go FSSTND this should end up in 'localstatedir' */
-       snprintf(pid_file_name, sizeof pid_file_name, "./citadel.pid");
-       pidfile_fp = fopen(pid_file_name, "w");
-       if (pidfile_fp != NULL) {
-               fprintf(pidfile_fp, "%d\n", (int)getpid());
-               fclose(pidfile_fp);
-       }
-
        lprintf(CTDL_INFO, "Opening databases\n");
        open_databases();
 
+       ctdl_thread_internal_init_tsd();
+       
+       CtdlThreadAllocTSD();
+       
        if (do_defrag) {
                defrag_databases();
        }
@@ -148,21 +197,13 @@ void master_cleanup(int exitcode) {
        /* Close the AdjRefCount queue file */
        AdjRefCount(-1, 0);
 
-       /* Shut down the indexer thread */
-       lprintf(CTDL_INFO, "Waiting for the indexer thread to shut down\n");
-       pthread_join(indexer_thread_tid, NULL);
-
-       /* Shut down the checkpoint thread */
-       lprintf(CTDL_INFO, "Waiting for the checkpoint thread to shut down\n");
-       pthread_join(checkpoint_thread_tid, NULL);
-
+       /* Do system-dependent stuff */
+       sysdep_master_cleanup();
+       
        /* Close databases */
        lprintf(CTDL_INFO, "Closing databases\n");
        close_databases();
 
-       /* Do system-dependent stuff */
-       sysdep_master_cleanup();
-
 #ifdef DEBUG_MEMORY_LEAKS
        dump_heap();
 #endif
@@ -175,12 +216,15 @@ void master_cleanup(int exitcode) {
                        sleep(32767);
                }
        }
+       
+       release_control();
 
        /* Now go away. */
        lprintf(CTDL_NOTICE, "citserver: Exiting with status %d\n", exitcode);
        fflush(stdout); fflush(stderr);
-
-       unlink(pid_file_name);
+       
+       if (restart_server != 0)
+               exit(1);
        exit(exitcode);
 }
 
@@ -257,7 +301,11 @@ void cmd_info(void) {
        }
 
        cprintf("%s\n", config.c_default_cal_zone);
-
+       /* Output load averages */
+       cprintf("%f\n", CtdlThreadLoadAvg);
+       cprintf("%f\n", CtdlThreadWorkerAvg);
+       cprintf("%d\n", CtdlThreadGetCount());
+       
        cprintf("000\n");
 }
 
@@ -339,11 +387,18 @@ int is_public_client(void)
 
                fp = fopen(public_clients_file, "r");
                if (fp != NULL) while (fgets(buf, sizeof buf, fp)!=NULL) {
-                       for (i=0; i<strlen(buf); ++i) {
-                               if (buf[i] == '#') buf[i] = 0;
+                       char *ptr;
+                       ptr = buf;
+                       while (!IsEmptyStr(ptr)) {
+                               if (*ptr == '#') {
+                                       *ptr = 0;
+                                       break;
+                               }
+                               else ptr++;
                        }
-                       while (isspace((buf[strlen(buf)-1]))) {
-                               buf[strlen(buf)-1] = 0;
+                       ptr--;
+                       while (ptr>buf && isspace(*ptr)) {
+                               *(ptr--) = 0;
                        }
                        if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
                                if ((strlen(public_clients) +
@@ -408,7 +463,7 @@ void cmd_iden(char *argbuf)
        safestrncpy(CC->cs_clientname, desc, sizeof CC->cs_clientname);
        CC->cs_clientname[31] = 0;
 
-       if (strlen(from_host) > 0) {
+       if (!IsEmptyStr(from_host)) {
                if (CC->is_local_socket) do_lookup = 1;
                else if (is_public_client()) do_lookup = 1;
        }
@@ -417,7 +472,7 @@ void cmd_iden(char *argbuf)
                lprintf(CTDL_DEBUG, "Looking up hostname '%s'\n", from_host);
                if ((addr.s_addr = inet_addr(from_host)) != -1) {
                        locate_host(CC->cs_host, sizeof CC->cs_host,
-                               NULL, 0,
+                               CC->cs_addr, sizeof CC->cs_addr,
                                &addr);
                }
                else {
@@ -479,12 +534,12 @@ void cmd_mesg(char *mname)
        /* Otherwise, look for the requested file by name. */
        else {
                mesg_locate(targ, sizeof targ, buf2, 2, (const char **)dirs);
-               if (strlen(targ) == 0) {
+               if (IsEmptyStr(targ)) {
                        snprintf(buf2, sizeof buf2, "%s.%d",
                                                        buf, CC->cs_clientdev);
                        mesg_locate(targ, sizeof targ, buf2, 2,
                                                        (const char **)dirs);
-                       if (strlen(targ) == 0) {
+                       if (IsEmptyStr(targ)) {
                                mesg_locate(targ, sizeof targ, buf, 2,
                                                        (const char **)dirs);
                        }       
@@ -494,7 +549,7 @@ void cmd_mesg(char *mname)
        free(dirs[0]);
        free(dirs[1]);
 
-       if (strlen(targ)==0) {
+       if (IsEmptyStr(targ)) {
                cprintf("%d '%s' not found.  (Searching in %s and %s)\n",
                        ERROR + FILE_NOT_FOUND,
                        mname,
@@ -539,7 +594,7 @@ void cmd_emsg(char *mname)
        if (CtdlAccessCheck(ac_aide)) return;
 
        extract_token(buf, mname, 0, '|', sizeof buf);
-       for (a=0; a<strlen(buf); ++a) {         /* security measure */
+       for (a=0; !IsEmptyStr(&buf[a]); ++a) {          /* security measure */
                if (buf[a] == '/') buf[a] = '.';
        }
 
@@ -550,7 +605,7 @@ void cmd_emsg(char *mname)
        free(dirs[0]);
        free(dirs[1]);
 
-       if (strlen(targ)==0) {
+       if (IsEmptyStr(targ)) {
                snprintf(targ, sizeof targ, 
                                 "%s/%s",
                                 ctdl_hlp_dir, buf);
@@ -752,12 +807,31 @@ void cmd_ipgm(char *argbuf)
 /*
  * Shut down the server
  */
-void cmd_down(void) {
+void cmd_down(char *argbuf) {
+       char *Reply ="%d Shutting down server.  Goodbye.\n";
 
        if (CtdlAccessCheck(ac_aide)) return;
 
-       cprintf("%d Shutting down server.  Goodbye.\n", CIT_OK);
-       time_to_die = 1;
+       if (!IsEmptyStr(argbuf))
+       {
+               int state = CIT_OK;
+               restart_server = extract_int(argbuf, 0);
+               
+               if (restart_server > 0)
+                       Reply = "%d Restarting server.  See you soon.\n";
+               if ((restart_server > 0) && !running_as_daemon)
+               {
+                       lprintf(CTDL_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
+                       Reply = "%d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
+                       state = ERROR;
+               }
+               cprintf(Reply, state);
+       }
+       else
+       {
+               cprintf(Reply, CIT_OK + SERVER_SHUTTING_DOWN);
+       }
+       CtdlThreadStopAll();
 }
 
 /*
@@ -768,7 +842,7 @@ void cmd_halt(void) {
        if (CtdlAccessCheck(ac_aide)) return;
 
        cprintf("%d Halting server.  Goodbye.\n", CIT_OK);
-       time_to_die = 1;
+       CtdlThreadStopAll();
        shutdown_and_halt = 1;
 }
 
@@ -778,14 +852,29 @@ void cmd_halt(void) {
 void cmd_scdn(char *argbuf)
 {
        int new_state;
+       int state = CIT_OK;
+       char *Reply = "%d %d\n";
 
        if (CtdlAccessCheck(ac_aide)) return;
 
        new_state = extract_int(argbuf, 0);
+       if ((new_state == 2) || (new_state == 3))
+       {
+               restart_server = 1;
+               if (!running_as_daemon)
+               {
+                       lprintf(CTDL_ERR, "The user requested restart, but not running as deamon! Geronimooooooo!\n");
+                       Reply = "%d %d Warning, not running in deamon mode. maybe we will come up again, but don't lean on it.\n";
+                       state = ERROR;
+               }
+
+               restart_server = extract_int(argbuf, 0);
+               new_state -= 2;
+       }
        if ((new_state == 0) || (new_state == 1)) {
                ScheduledShutdown = new_state;
        }
-       cprintf("%d %d\n", CIT_OK, ScheduledShutdown);
+       cprintf(Reply, state, ScheduledShutdown);
 }
 
 
@@ -844,11 +933,10 @@ void begin_session(struct CitContext *con)
        strcpy(con->lastcmdname, "    ");
        strcpy(con->cs_clientname, "(unknown)");
        strcpy(con->curr_user, NLI);
-       strcpy(con->net_node, "");
-       strcpy(con->fake_username, "");
-       strcpy(con->fake_postname, "");
-       strcpy(con->fake_hostname, "");
-       strcpy(con->fake_roomname, "");
+       *con->net_node = '\0';
+       *con->fake_username = '\0';
+       *con->fake_hostname = '\0';
+       *con->fake_roomname = '\0';
        generate_nonce(con);
        safestrncpy(con->cs_host, config.c_fqdn, sizeof con->cs_host);
        safestrncpy(con->cs_addr, "", sizeof con->cs_addr);
@@ -870,8 +958,9 @@ void begin_session(struct CitContext *con)
        con->dl_is_net = 0;
 
        con->nologin = 0;
-       if ((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions))
+       if ((config.c_maxsessions > 0)&&(num_sessions > config.c_maxsessions)) {
                con->nologin = 1;
+       }
 
        lprintf(CTDL_NOTICE, "Session started.\n");
 
@@ -882,10 +971,11 @@ void begin_session(struct CitContext *con)
 
 void citproto_begin_session() {
        if (CC->nologin==1) {
-               cprintf("%d %s: Too many users are already online "
-                       "(maximum is %d)\n",
+               cprintf("%d %s: Too many users are already online (maximum is %d)\n",
                        ERROR + MAX_SESSIONS_EXCEEDED,
-                       config.c_nodename, config.c_maxsessions);
+                       config.c_nodename, config.c_maxsessions
+               );
+               CC->kill_me = 1;
        }
        else {
                cprintf("%d %s Citadel server ready.\n",
@@ -901,12 +991,16 @@ void citproto_begin_session() {
  */
 void do_command_loop(void) {
        char cmdbuf[SIZ];
-
+       char *old_name = NULL;
+       
+       old_name = CtdlThreadName("do_command_loop");
+       
        time(&CC->lastcmd);
        memset(cmdbuf, 0, sizeof cmdbuf); /* Clear it, just in case */
        if (client_getln(cmdbuf, sizeof cmdbuf) < 1) {
                lprintf(CTDL_ERR, "Client disconnected: ending session.\n");
                CC->kill_me = 1;
+               CtdlThreadName(old_name);
                return;
        }
 
@@ -935,6 +1029,8 @@ void do_command_loop(void) {
                safestrncpy(CC->lastcmdname, cmdbuf, sizeof(CC->lastcmdname));
                time(&CC->lastidle);
        }
+       
+       CtdlThreadName(cmdbuf);
                
        if ((strncasecmp(cmdbuf, "ENT0", 4))
           && (strncasecmp(cmdbuf, "MESG", 4))
@@ -1242,7 +1338,7 @@ void do_command_loop(void) {
        }
 
        else if (!strncasecmp(cmdbuf,"DOWN",4)) {
-               cmd_down();
+               cmd_down(&cmdbuf[5]);
        }
 
        else if (!strncasecmp(cmdbuf,"HALT",4)) {
@@ -1306,6 +1402,7 @@ void do_command_loop(void) {
 
        /* Run any after-each-command routines registered by modules */
        PerformSessionHooks(EVT_CMD);
+       CtdlThreadName(old_name);
 }