#include "ctdl_module.h"
#include "threads.h"
+#include "user_ops.h"
+#include "control.h"
+
#ifdef DEBUG_MEMORY_LEAKS
struct igheap {
#endif
-pthread_key_t MyConKey; /* TSD key for MyContext() */
+citthread_key_t MyConKey; /* TSD key for MyContext() */
int verbosity = DEFAULT_VERBOSITY; /* Logging level */
/*
- * Create an interface to lprintf that follows the coding convention.
- * This is here until such time as we have replaced all calls to lprintf with CtdlLogPrintf
- */
-
-void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...)
-{
- va_list arg_ptr;
- va_start(arg_ptr, format);
- vlprintf(loglevel, format, arg_ptr);
- va_end(arg_ptr);
-}
-
-
-/*
- * lprintf() ... Write logging information
+ * CtdlLogPrintf() ... Write logging information
*/
-void lprintf(enum LogLevel loglevel, const char *format, ...) {
+void CtdlLogPrintf(enum LogLevel loglevel, const char *format, ...) {
va_list arg_ptr;
va_start(arg_ptr, format);
- vlprintf(loglevel, format, arg_ptr);
+ vCtdlLogPrintf(loglevel, format, arg_ptr);
va_end(arg_ptr);
}
-void vlprintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
+void vCtdlLogPrintf(enum LogLevel loglevel, const char *format, va_list arg_ptr)
{
char buf[SIZ], buf2[SIZ];
tim.tm_mday, tim.tm_hour, tim.tm_min,
tim.tm_sec, (long)tv.tv_usec);
}
- vsprintf(buf2, format, arg_ptr);
+ vsnprintf(buf2, SIZ, format, arg_ptr);
fprintf(stderr, "%s%s", buf, buf2);
fflush(stderr);
volatile int running_as_daemon = 0;
static RETSIGTYPE signal_cleanup(int signum) {
- CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
#ifdef THREADS_USESIGNALS
if (CT)
- {
- CtdlLogPrintf(CTDL_DEBUG, "Thread \"%s\" caught signal %d.\n", CT->name, signum);
CT->signal = signum;
- }
else
#endif
+ {
+ CtdlLogPrintf(CTDL_DEBUG, "Caught signal %d; shutting down.\n", signum);
exit_signal = signum;
+ }
}
* CitContext structure (in the ContextList linked list) of the
* session to which the calling thread is currently bound.
*/
- if (pthread_key_create(&MyConKey, NULL) != 0) {
+ if (citthread_key_create(&MyConKey, NULL) != 0) {
CtdlLogPrintf(CTDL_CRIT, "Can't create TSD key: %s\n",
strerror(errno));
}
register struct CitContext *c;
- return ((c = (struct CitContext *) pthread_getspecific(MyConKey),
+ return ((c = (struct CitContext *) citthread_getspecific(MyConKey),
c == NULL) ? &masterCC : c
);
}
CtdlLogPrintf(CTDL_ALERT, "citserver: can't allocate memory!!\n");
return NULL;
}
- memset(me, 0, sizeof(struct CitContext));
+ 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.
}
++num_sessions;
end_critical_section(S_SESSION_TABLE);
- return(me);
+ 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 */
+ putuser(&(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. If the kernel supplies
* native TCP buffering (Linux & *BSD), use that; otherwise, emulate it with
/*
* client_write() ... Send binary data to the client.
*/
-void client_write(char *buf, int nbytes)
+int client_write(char *buf, int nbytes)
{
int bytes_written = 0;
int retval;
#ifndef HAVE_TCP_BUFFERING
int old_buffer_len = 0;
#endif
+ fd_set wset;
t_context *Ctx;
+ int fdflags;
Ctx = CC;
if (Ctx->redirect_buffer != NULL) {
memcpy(&Ctx->redirect_buffer[Ctx->redirect_len], buf, nbytes);
Ctx->redirect_len += nbytes;
Ctx->redirect_buffer[Ctx->redirect_len] = 0;
- return;
+ return 0;
}
#ifndef HAVE_TCP_BUFFERING
Ctx->buffer_len += nbytes;
Ctx->output_buffer = realloc(Ctx->output_buffer, Ctx->buffer_len);
memcpy(&Ctx->output_buffer[old_buffer_len], buf, nbytes);
- return;
+ return 0;
}
#endif
#ifdef HAVE_OPENSSL
if (Ctx->redirect_ssl) {
client_write_ssl(buf, nbytes);
- return;
+ return 0;
}
#endif
+ fdflags = fcntl(Ctx->client_socket, F_GETFL);
+
while (bytes_written < nbytes) {
+ if ((fdflags & O_NONBLOCK) == O_NONBLOCK) {
+ FD_ZERO(&wset);
+ FD_SET(Ctx->client_socket, &wset);
+ if (select(1, NULL, &wset, NULL, NULL) == -1) {
+ CtdlLogPrintf(CTDL_ERR,
+ "client_write(%d bytes) select failed: %s (%d)\n",
+ nbytes - bytes_written,
+ strerror(errno), errno);
+ cit_backtrace();
+ Ctx->kill_me = 1;
+ return -1;
+ }
+ }
+
retval = write(Ctx->client_socket, &buf[bytes_written],
nbytes - bytes_written);
if (retval < 1) {
cit_backtrace();
// CtdlLogPrintf(CTDL_DEBUG, "Tried to send: %s", &buf[bytes_written]);
Ctx->kill_me = 1;
- return;
+ return -1;
}
bytes_written = bytes_written + retval;
}
+ return 0;
}
retval = select( (fd)+1,
&rfds, NULL, NULL, &tv);
+ if (retval < 0)
+ {
+ if (errno == EINTR)
+ {
+ CtdlLogPrintf(CTDL_DEBUG, "Interrupted select().\n");
+ CC->kill_me = 1;
+ return (-1);
+ }
+ }
if (FD_ISSET(fd, &rfds) == 0) {
return(0);
rem = ptr->next;
--num_sessions;
- lprintf(CTDL_DEBUG, "Purging session %d\n", ptr->cs_pid);
+ CtdlLogPrintf(CTDL_DEBUG, "Purging session %d\n", ptr->cs_pid);
RemoveContext(ptr);
free (ptr);
ptr = rem;
}
-/*
- * The system-dependent part of master_cleanup() - close the master socket.
- */
-void sysdep_master_cleanup(void) {
+
+void close_masters (void)
+{
struct ServiceFunctionHook *serviceptr;
/*
serviceptr = serviceptr->next ) {
if (serviceptr->tcp_port > 0)
+ {
CtdlLogPrintf(CTDL_INFO, "Closing listener on port %d\n",
serviceptr->tcp_port);
-
+ serviceptr->tcp_port = 0;
+ }
+
if (serviceptr->sockpath != NULL)
CtdlLogPrintf(CTDL_INFO, "Closing listener on '%s'\n",
serviceptr->sockpath);
close(serviceptr->msock);
-
/* If it's a Unix domain socket, remove the file. */
if (serviceptr->sockpath != NULL) {
unlink(serviceptr->sockpath);
+ serviceptr->sockpath = NULL;
}
}
+}
+
+
+/*
+ * The system-dependent part of master_cleanup() - close the master socket.
+ */
+void sysdep_master_cleanup(void) {
+
+ close_masters();
context_cleanup();
else {
fp = fopen(file_pid_file, "w");
if (fp != NULL) {
- /*
- * NB.. The pid file contains the pid of the actual server.
- * This is not the pid of the watcher process
- */
- fprintf(fp, ""F_PID_T"\n", current_child);
+ fprintf(fp, ""F_PID_T"\n", getpid());
fclose(fp);
}
waitpid(current_child, &status, 0);
-
-
/*
* Bind a thread to a context. (It's inline merely to speed things up.)
*/
INLINE void become_session(struct CitContext *which_con) {
- pthread_setspecific(MyConKey, (void *)which_con );
+ citthread_setspecific(MyConKey, (void *)which_con );
}
/*
* This loop just keeps going and going and going...
- */
+ */
+/*
+ * FIXME:
+ * This current implimentation of worker_thread creates a bottle neck in several situations
+ * The first thing to remember is that a single thread can handle more than one connection at a time.
+ * More threads mean less memory for the system to run in.
+ * So for efficiency we want every thread to be doing something useful or waiting in the main loop for
+ * something to happen anywhere.
+ * This current implimentation requires worker threads to wait in other locations, after it has
+ * been committed to a single connection which is very wasteful.
+ * As an extreme case consider this:
+ * A slow client connects and this slow client sends only one character each second.
+ * With this current implimentation a single worker thread is dispatched to handle that connection
+ * until such times as the client timeout expires, an error occurs on the socket or the client
+ * completes its transmission.
+ * THIS IS VERY BAD since that thread could have handled a read from many more clients in each one
+ * second interval between chars.
+ *
+ * It is my intention to re-write this code and the associated client_getln, client_read functions
+ * to allow any thread to read data on behalf of any connection (context).
+ * To do this I intend to have this main loop read chars into a buffer stored in the context.
+ * Once the correct criteria for a full buffer is met then we will dispatch a thread to
+ * process it.
+ * This worker thread loop also needs to be able to handle binary data.
+ */
+
void *worker_thread(void *arg) {
int i;
int highest;
tv.tv_usec = 0;
retval = CtdlThreadSelect(highest + 1, &readfds, NULL, NULL, &tv);
}
-
- if (CtdlThreadCheckStop()) return(NULL);
+ else
+ return NULL;
/* Now figure out who made this select() unblock.
* First, check for an error or exit condition.
if (errno != EINTR) {
CtdlLogPrintf(CTDL_EMERG, "Exiting (%s)\n", strerror(errno));
CtdlThreadStopAll();
- } else if (!CtdlThreadCheckStop()) {
- CtdlLogPrintf(CTDL_DEBUG, "Un handled select failure.\n");
+ } else {
+ CtdlLogPrintf(CTDL_DEBUG, "Interrupted CtdlThreadSelect.\n");
+ if (CtdlThreadCheckStop()) return(NULL);
goto do_select;
}
}
else if(retval == 0) {
+ if (CtdlThreadCheckStop()) return(NULL);
goto SKIP_SELECT;
}
/* Next, check to see if it's a new client connecting
projects / citadel.git / blobdiff