/*
- * $Id: sysdep.c 7989 2009-10-31 15:29:37Z davew $
- *
* Citadel context management stuff.
- * See COPYING for copyright information.
- *
* Here's where we (hopefully) have all the code that manipulates contexts.
*
+ * Copyright (c) 1987-2010 by the citadel.org team
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "sysdep.h"
#include <sys/socket.h>
#include <syslog.h>
#include <sys/syslog.h>
+/*
+#include <sys/syscall.h>
+*/
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
}
+
+
+
+/*
+ * Locate a context by its session number and terminate it if the user is able.
+ * User can NOT terminate their current session.
+ * User CAN terminate any other session that has them logged in.
+ * Aide CAN terminate any session except the current one.
+ */
+int CtdlTerminateOtherSession (int session_num)
+{
+ int ret = 0;
+ CitContext *ccptr;
+
+ if (session_num == CC->cs_pid) {
+ return TERM_NOTALLOWED;
+ }
+
+ CtdlLogPrintf(CTDL_DEBUG, "Locating session to kill\n");
+ begin_critical_section(S_SESSION_TABLE);
+ for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
+ if (session_num == ccptr->cs_pid) {
+ ret |= TERM_FOUND;
+ if ((ccptr->user.usernum == CC->user.usernum)
+ || (CC->user.axlevel >= AxAideU)) {
+ ret |= TERM_ALLOWED;
+ ccptr->kill_me = 1;
+ }
+ }
+ }
+ end_critical_section(S_SESSION_TABLE);
+ return ret;
+}
+
+
+
+/*
+ * Check to see if the user who we just sent mail to is logged in. If yes,
+ * bump the 'new mail' counter for their session. That enables them to
+ * receive a new mail notification without having to hit the database.
+ */
+void BumpNewMailCounter(long which_user)
+{
+ CtdlBumpNewMailCounter(which_user);
+}
+
+void CtdlBumpNewMailCounter(long which_user)
+{
+ CitContext *ptr;
+
+ begin_critical_section(S_SESSION_TABLE);
+
+ for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
+ if (ptr->user.usernum == which_user) {
+ ptr->newmail += 1;
+ }
+ }
+
+ end_critical_section(S_SESSION_TABLE);
+}
+
+
+/*
+ * Check to see if a user is currently logged in
+ * Take care with what you do as a result of this test.
+ * The user may not have been logged in when this function was called BUT
+ * because of threading the user might be logged in before you test the result.
+ */
+int CtdlIsUserLoggedIn (char *user_name)
+{
+ CitContext *cptr;
+ int ret = 0;
+
+ begin_critical_section (S_SESSION_TABLE);
+ for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
+ if (!strcasecmp(cptr->user.fullname, user_name)) {
+ ret = 1;
+ break;
+ }
+ }
+ end_critical_section(S_SESSION_TABLE);
+ return ret;
+}
+
+
+
+/*
+ * Check to see if a user is currently logged in.
+ * Basically same as CtdlIsUserLoggedIn() but uses the user number instead.
+ * Take care with what you do as a result of this test.
+ * The user may not have been logged in when this function was called BUT
+ * because of threading the user might be logged in before you test the result.
+ */
+int CtdlIsUserLoggedInByNum (long usernum)
+{
+ CitContext *cptr;
+ int ret = 0;
+
+ begin_critical_section(S_SESSION_TABLE);
+ for (cptr = ContextList; cptr != NULL; cptr = cptr->next) {
+ if (cptr->user.usernum == usernum) {
+ ret = 1;
+ }
+ }
+ end_critical_section(S_SESSION_TABLE);
+ return ret;
+}
+
+
+
/*
* Return a pointer to the CitContext structure bound to the thread which
* called this function. If there's no such binding (for example, if it's
+/*
+ * Terminate idle sessions. This function pounds through the session table
+ * comparing the current time to each session's time-of-last-command. If an
+ * idle session is found it is terminated, then the search restarts at the
+ * beginning because the pointer to our place in the list becomes invalid.
+ */
+void terminate_idle_sessions(void)
+{
+ CitContext *ccptr;
+ time_t now;
+ int session_to_kill;
+ int killed = 0;
+ int longrunners = 0;
+
+ now = time(NULL);
+ session_to_kill = 0;
+ begin_critical_section(S_SESSION_TABLE);
+ for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
+ if ( (ccptr!=CC)
+ && (config.c_sleeping > 0)
+ && (now - (ccptr->lastcmd) > config.c_sleeping) ) {
+ if (!ccptr->dont_term) {
+ ccptr->kill_me = 1;
+ ++killed;
+ }
+ else
+ longrunners ++;
+ }
+ }
+ end_critical_section(S_SESSION_TABLE);
+ if (killed > 0)
+ CtdlLogPrintf(CTDL_INFO, "Terminated %d idle sessions\n", killed);
+ if (longrunners > 0)
+ CtdlLogPrintf(CTDL_INFO, "Didn't terminate %d protected idle sessions;\n", killed);
+}
+
+void terminate_stuck_sessions(void)
+{
+ CitContext *ccptr;
+ int killed = 0;
+
+ begin_critical_section(S_SESSION_TABLE);
+ for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
+ if (ccptr->client_socket != -1)
+ {
+ close(ccptr->client_socket);
+ ccptr->client_socket = -1;
+ killed++;
+ }
+ }
+ end_critical_section(S_SESSION_TABLE);
+ if (killed > 0)
+ CtdlLogPrintf(CTDL_INFO, "Flushed %d stuck sessions\n", killed);
+}
+
+
+
/*
* Terminate a session.
*/
* might make references to "CC" assuming it's the right one.
*/
become_session(con);
- logout();
+ CtdlUserLogout();
PerformSessionHooks(EVT_STOP);
become_session(NULL);
con->ldap_dn = NULL;
}
+ FreeStrBuf(&con->MigrateBuf);
+ FreeStrBuf(&con->ReadBuf);
CtdlLogPrintf(CTDL_DEBUG, "Done with RemoveContext()\n");
}
return NULL;
}
memset(me, 0, sizeof(CitContext));
-
/* Give the contaxt a name. Hopefully makes it easier to track */
strcpy (me->user.fullname, "SYS_notauth");
* Generate a unique session number and insert this context into
* the list.
*/
+ me->MigrateBuf = NewStrBuf();
+ me->ReadBuf = NewStrBuf();
begin_critical_section(S_SESSION_TABLE);
me->cs_pid = ++next_pid;
me->prev = NULL;
me->next = ContextList;
+ me->lastcmd = time(NULL); /* set lastcmd to now to prevent idle timer infanticide */
ContextList = me;
if (me->next != NULL) {
me->next->prev = me;
}
+/*
+ * Return an array containing a copy of the context list.
+ * This allows worker threads to perform "for each context" operations without
+ * having to lock and traverse the live list.
+ */
CitContext *CtdlGetContextArray(int *count)
{
int nContexts, i;
nContexts = num_sessions;
nptr = malloc(sizeof(CitContext) * nContexts);
- if (!nptr)
+ if (!nptr) {
+ *count = 0;
return NULL;
+ }
begin_critical_section(S_SESSION_TABLE);
- for (cptr = ContextList, i=0; cptr != NULL && i < nContexts; cptr = cptr->next, i++)
+ for (cptr = ContextList, i=0; cptr != NULL && i < nContexts; cptr = cptr->next, i++) {
memcpy(&nptr[i], cptr, sizeof (CitContext));
+ }
end_critical_section (S_SESSION_TABLE);
*count = i;
-/**
+/*
* This function fills in a context and its user field correctly
* Then creates/loads that user
*/
void CtdlFillSystemContext(CitContext *context, char *name)
{
- char sysname[USERNAME_SIZE];
+ char sysname[SIZ];
+ long len;
memset(context, 0, sizeof(CitContext));
context->internal_pgm = 1;
context->cs_pid = 0;
strcpy (sysname, "SYS_");
strcat (sysname, name);
+ len = cutuserkey(sysname);
+ memcpy(context->curr_user, sysname, len + 1);
+ context->client_socket = (-1);
+
/* internal_create_user has the side effect of loading the user regardless of wether they
* already existed or needed to be created
*/
- internal_create_user (sysname, &(context->user), -1) ;
+ internal_create_user (sysname, len, &(context->user), -1) ;
/* Check to see if the system user needs upgrading */
if (context->user.usernum == 0)
{ /* old system user with number 0, upgrade it */
context->user.usernum = get_new_user_number();
- CtdlLogPrintf(CTDL_DEBUG, "Upgrading system user \"%s\" from user number 0 to user number %d\n", context->user.fullname, context->user.usernum);
+ CtdlLogPrintf(CTDL_DEBUG, "Upgrading system user \"%s\" from user number 0 to user number %ld\n", context->user.fullname, context->user.usernum);
/* add user to the database */
CtdlPutUser(&(context->user));
cdb_store(CDB_USERSBYNUMBER, &(context->user.usernum), sizeof(long), context->user.fullname, strlen(context->user.fullname)+1);
}
}
+/*
+ * flush it again...
+ */
+void CtdlClearSystemContext(void)
+{
+ CitContext *CCC = MyContext();
+
+ memset(CCC, 0, sizeof(CitContext));
+ citthread_setspecific(MyConKey, NULL);
+}
+
/*
* Cleanup any contexts that are left lying around
*/
+
/*
- * Bind a thread to a context. (It's inline merely to speed things up.)
+ * Set the "async waiting" flag for a session, if applicable
*/
-INLINE void become_session(CitContext *which_con) {
- citthread_setspecific(MyConKey, (void *)which_con );
+void set_async_waiting(struct CitContext *ccptr)
+{
+ CtdlLogPrintf(CTDL_DEBUG, "Setting async_waiting flag for session %d\n", ccptr->cs_pid);
+ if (ccptr->is_async) {
+ ccptr->async_waiting++;
+ if (ccptr->state == CON_IDLE) {
+ ccptr->state = CON_READY;
+ }
+ }
}
-
-
-
projects / citadel.git / blobdiff