#include "housekeeping.h"
#include "modules/crypto/serv_crypto.h" /* Needed for init_ssl, client_write_ssl, client_read_ssl, destruct_ssl */
#include "ecrash.h"
+#include "context.h"
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
-citthread_key_t MyConKey; /* TSD key for MyContext() */
-
int verbosity = DEFAULT_VERBOSITY; /* Logging level */
-struct CitContext masterCC;
-time_t last_purge = 0; /* Last dead session purge */
-int num_sessions = 0; /* Current number of sessions */
-
int syslog_facility = LOG_DAEMON;
int enable_syslog = 0;
-/* Flag for single user mode */
-static int want_single_user = 0;
-
-/* Try to go single user */
-
-int CtdlTrySingleUser(void)
-{
- int can_do = 0;
-
- begin_critical_section(S_SINGLE_USER);
- if (want_single_user)
- can_do = 0;
- else
- {
- can_do = 1;
- want_single_user = 1;
- }
- end_critical_section(S_SINGLE_USER);
- return can_do;
-}
-
-void CtdlEndSingleUser(void)
-{
- begin_critical_section(S_SINGLE_USER);
- want_single_user = 0;
- end_critical_section(S_SINGLE_USER);
-}
-
-
-int CtdlWantSingleUser(void)
-{
- return want_single_user;
-}
-
-int CtdlIsSingleUser(void)
-{
- if (want_single_user)
- {
- /* check for only one context here */
- if (num_sessions == 1)
- return TRUE;
- }
- return FALSE;
-}
-
-
/*
* CtdlLogPrintf() ... Write logging information
*/
-/*
- * 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
- * called by the housekeeper thread) then a generic 'master' CC is returned.
- *
- * This function is used *VERY* frequently and must be kept small.
- */
-struct CitContext *MyContext(void) {
-
- register struct CitContext *c;
-
- return ((c = (struct CitContext *) citthread_getspecific(MyConKey),
- c == NULL) ? &masterCC : c
- );
-}
-
-
-/*
- * Initialize a new context and place it in the list. The session number
- * used to be the PID (which is why it's called cs_pid), but that was when we
- * had one process per session. Now we just assign them sequentially, starting
- * at 1 (don't change it to 0 because masterCC uses 0).
- */
-struct CitContext *CreateNewContext(void) {
- struct CitContext *me;
- static int next_pid = 0;
-
- me = (struct CitContext *) malloc(sizeof(struct CitContext));
- if (me == NULL) {
- CtdlLogPrintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
- return NULL;
- }
-
- memset(me, 0, sizeof(struct CitContext));
-
- /* Give the contaxt a name. Hopefully makes it easier to track */
- strcpy (me->user.fullname, "SYS_notauth");
-
- /* The new context will be created already in the CON_EXECUTING state
- * in order to prevent another thread from grabbing it while it's
- * being set up.
- */
- me->state = CON_EXECUTING;
- /*
- * Generate a unique session number and insert this context into
- * the list.
- */
- begin_critical_section(S_SESSION_TABLE);
- me->cs_pid = ++next_pid;
- me->prev = NULL;
- me->next = ContextList;
- ContextList = me;
- if (me->next != NULL) {
- me->next->prev = me;
- }
- ++num_sessions;
- end_critical_section(S_SESSION_TABLE);
- return (me);
-}
-
-
-struct CitContext *CtdlGetContextArray(int *count)
-{
- int nContexts, i;
- struct CitContext *nptr, *cptr;
-
- nContexts = num_sessions;
- nptr = malloc(sizeof(struct CitContext) * nContexts);
- if (!nptr)
- return NULL;
- begin_critical_section(S_SESSION_TABLE);
- for (cptr = ContextList, i=0; cptr != NULL && i < nContexts; cptr = cptr->next, i++)
- memcpy(&nptr[i], cptr, sizeof (struct CitContext));
- end_critical_section (S_SESSION_TABLE);
-
- *count = i;
- return nptr;
-}
-
-
-
-/**
- * This function fills in a context and its user field correctly
- * Then creates/loads that user
- */
-void CtdlFillSystemContext(struct CitContext *context, char *name)
-{
- char sysname[USERNAME_SIZE];
-
- memset(context, 0, sizeof(struct CitContext));
- context->internal_pgm = 1;
- context->cs_pid = 0;
- strcpy (sysname, "SYS_");
- strcat (sysname, name);
- /* 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) ;
-
- /* 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);
- /* 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);
- }
-}
-
/*
* The following functions implement output buffering on operating systems which
* support it (such as Linux and various BSD flavors).
/*
* Cleanup any contexts that are left lying around
*/
-void context_cleanup(void)
-{
- struct CitContext *ptr = NULL;
- struct CitContext *rem = NULL;
-
- /*
- * Clean up the contexts.
- * There are no threads so no critical_section stuff is needed.
- */
- ptr = ContextList;
-
- /* We need to update the ContextList because some modules may want to itterate it
- * Question is should we NULL it before iterating here or should we just keep updating it
- * as we remove items?
- *
- * Answer is to NULL it first to prevent modules from doing any actions on the list at all
- */
- ContextList=NULL;
- while (ptr != NULL){
- /* Remove the session from the active list */
- rem = ptr->next;
- --num_sessions;
-
- CtdlLogPrintf(CTDL_DEBUG, "Purging session %d\n", ptr->cs_pid);
- RemoveContext(ptr);
- free (ptr);
- ptr = rem;
- }
-}
-
void close_masters (void)
-/*
- * Terminate another session.
- * (This could justifiably be moved out of sysdep.c because it
- * no longer does anything that is system-dependent.)
- */
-void kill_session(int session_to_kill) {
- struct CitContext *ptr;
-
- begin_critical_section(S_SESSION_TABLE);
- for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
- if (ptr->cs_pid == session_to_kill) {
- ptr->kill_me = 1;
- }
- }
- end_critical_section(S_SESSION_TABLE);
-}
-
pid_t current_child;
void graceful_shutdown(int signum) {
kill(current_child, signum);
}
}
-/*
- * Purge all sessions which have the 'kill_me' flag set.
- * This function has code to prevent it from running more than once every
- * few seconds, because running it after every single unbind would waste a lot
- * of CPU time and keep the context list locked too much. To force it to run
- * anyway, set "force" to nonzero.
- */
-void dead_session_purge(int force) {
- struct CitContext *ptr, *ptr2; /* general-purpose utility pointer */
- struct CitContext *rem = NULL; /* list of sessions to be destroyed */
-
- if (force == 0) {
- if ( (time(NULL) - last_purge) < 5 ) {
- return; /* Too soon, go away */
- }
- }
- time(&last_purge);
-
- if (try_critical_section(S_SESSION_TABLE))
- return;
-
- ptr = ContextList;
- while (ptr) {
- ptr2 = ptr;
- ptr = ptr->next;
-
- if ( (ptr2->state == CON_IDLE) && (ptr2->kill_me) ) {
- /* Remove the session from the active list */
- if (ptr2->prev) {
- ptr2->prev->next = ptr2->next;
- }
- else {
- ContextList = ptr2->next;
- }
- if (ptr2->next) {
- ptr2->next->prev = ptr2->prev;
- }
-
- --num_sessions;
- /* And put it on our to-be-destroyed list */
- ptr2->next = rem;
- rem = ptr2;
- }
- }
- end_critical_section(S_SESSION_TABLE);
-
- /* Now that we no longer have the session list locked, we can take
- * our time and destroy any sessions on the to-be-killed list, which
- * is allocated privately on this thread's stack.
- */
- while (rem != NULL) {
- CtdlLogPrintf(CTDL_DEBUG, "Purging session %d\n", rem->cs_pid);
- RemoveContext(rem);
- ptr = rem;
- rem = rem->next;
- free(ptr);
- }
-}
-
-
-
-
-
-/*
- * masterCC is the context we use when not attached to a session. This
- * function initializes it.
- */
-void InitializeMasterCC(void) {
- memset(&masterCC, 0, sizeof(struct CitContext));
- masterCC.internal_pgm = 1;
- masterCC.cs_pid = 0;
-}
-
-
-
-
-/*
- * Bind a thread to a context. (It's inline merely to speed things up.)
- */
-INLINE void become_session(struct CitContext *which_con) {
- if (which_con)
- ctdl_thread_internal_change_state(CT, CTDL_THREAD_RUNNING);
-
- citthread_setspecific(MyConKey, (void *)which_con );
-}
-
/*
begin_critical_section(S_SESSION_TABLE);
for (ptr = ContextList; ptr != NULL; ptr = ptr->next) {
- if (ptr->state == CON_IDLE) {
+ /* Dont select on dead sessions only truly idle ones */
+ if ((ptr->state == CON_IDLE)) {
FD_SET(ptr->client_socket, &readfds);
if (ptr->client_socket > highest)
highest = ptr->client_socket;
projects / citadel.git / blobdiff