* $Id$
*
* Citadel "system dependent" stuff.
- * See copyright.txt for copyright information.
+ * See COPYING for copyright information.
*
* Here's where we (hopefully) have most parts of the Citadel server that
* would need to be altered to run the server in a non-POSIX environment.
#include "ctdl_module.h"
#include "threads.h"
+#include "user_ops.h"
+#include "control.h"
+
#ifdef DEBUG_MEMORY_LEAKS
struct igheap {
int enable_syslog = 0;
-/*
- * 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, ...)
+/* Flag for single user mode */
+static int want_single_user = 0;
+
+/* Try to go single user */
+
+int CtdlTrySingleUser(void)
{
- va_list arg_ptr;
- va_start(arg_ptr, format);
- vlprintf(loglevel, format, arg_ptr);
- va_end(arg_ptr);
+ 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;
}
/*
- * 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;
+ }
}
if (actual_queue_len < 5) actual_queue_len = 5;
i = unlink(sockpath);
- if (i != 0) if (errno != ENOENT) {
+ if ((i != 0) && (errno != ENOENT)) {
*errormessage = (char*) malloc(SIZ + 1);
snprintf(*errormessage, SIZ, "citserver: can't unlink %s: %s",
sockpath, strerror(errno));
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.
}
+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
- * user-space buffering.
+ * The following functions implement output buffering on operating systems which
+ * support it (such as Linux and various BSD flavors).
*/
#ifndef HAVE_DARWIN
#ifdef TCP_CORK
#endif /* TCP_CORK */
#endif /* HAVE_DARWIN */
-#ifdef HAVE_TCP_BUFFERING
static unsigned on = 1, off = 0;
-void buffer_output(void) {
- struct CitContext *ctx = MyContext();
- setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
- ctx->buffering = 1;
-}
-void unbuffer_output(void) {
- struct CitContext *ctx = MyContext();
- setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
- ctx->buffering = 0;
-}
-
-void flush_output(void) {
- struct CitContext *ctx = MyContext();
- setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
- setsockopt(ctx->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
-}
-#else
-#ifdef HAVE_DARWIN
-/* Stub functions for Darwin/OS X where TCP buffering isn't liked at all */
void buffer_output(void) {
- CC->buffering = 0;
-}
-void unbuffer_output(void) {
- CC->buffering = 0;
-}
-void flush_output(void) {
-}
-#else
-void buffer_output(void) {
- if (CC->buffering == 0) {
- CC->buffering = 1;
- CC->buffer_len = 0;
- CC->output_buffer = malloc(SIZ);
+#ifdef HAVE_TCP_BUFFERING
+ if (!CC->redirect_ssl) {
+ setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
}
+#endif
}
-void flush_output(void) {
- if (CC->buffering == 1) {
- client_write(CC->output_buffer, CC->buffer_len);
- CC->buffer_len = 0;
+void unbuffer_output(void) {
+#ifdef HAVE_TCP_BUFFERING
+ if (!CC->redirect_ssl) {
+ setsockopt(CC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
}
+#endif
}
-void unbuffer_output(void) {
- if (CC->buffering == 1) {
- CC->buffering = 0;
- /* We don't call flush_output because we can't. */
- client_write(CC->output_buffer, CC->buffer_len);
- CC->buffer_len = 0;
- free(CC->output_buffer);
- CC->output_buffer = NULL;
- }
+void flush_output(void) {
+#ifdef HAVE_TCP_BUFFERING
+ struct CitContext *CCC = CC;
+ setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &off, 4);
+ setsockopt(CCC->client_socket, IPPROTO_TCP, TCP_CORK, &on, 4);
+#endif
}
-#endif /* HAVE_DARWIN */
-#endif /* HAVE_TCP_BUFFERING */
/*
* 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
- /* If we're buffering for later, do that now. */
- if (Ctx->buffering) {
- old_buffer_len = Ctx->buffer_len;
- Ctx->buffer_len += nbytes;
- Ctx->output_buffer = realloc(Ctx->output_buffer, Ctx->buffer_len);
- memcpy(&Ctx->output_buffer[old_buffer_len], buf, nbytes);
- return;
- }
-#endif
-
- /* Ok, at this point we're not buffering. Go ahead and write. */
-
#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;
}
/*
- * cprintf() ... Send formatted printable data to the client. It is
- * implemented in terms of client_write() but remains in
- * sysdep.c in case we port to somewhere without va_args...
+ * cprintf() Send formatted printable data to the client.
+ * Implemented in terms of client_write() so it's technically not sysdep...
*/
void cprintf(const char *format, ...) {
va_list arg_ptr;
- char buf[1024];
+ char buf[1024];
va_start(arg_ptr, format);
if (vsnprintf(buf, sizeof buf, format, arg_ptr) == -1)
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;
exit(0);
}
+int nFireUps = 0;
+int nFireUpsNonRestart = 0;
+pid_t ForkedPid = 1;
/*
* Start running as a daemon.
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);
}
-
do_restart = 0;
-
+ nFireUpsNonRestart = nFireUps;
/* Did the main process exit with an actual exit code? */
if (WIFEXITED(status)) {
/* Any other exit code means we should restart. */
else {
do_restart = 1;
+ nFireUps++;
+ ForkedPid = current_child;
}
}
/* Any other type of termination (signals, etc.) should also restart. */
else {
do_restart = 1;
+ nFireUps++;
+ ForkedPid = current_child;
}
} while (do_restart);
+void checkcrash(void)
+{
+ if (nFireUpsNonRestart != nFireUps)
+ {
+ StrBuf *CrashMail;
+
+ CrashMail = NewStrBuf();
+ CtdlLogPrintf (CTDL_ALERT, "----------------sending crash mail\n");
+ StrBufPrintf(CrashMail,
+ "Your CitServer is just recovering from an unexpected termination.\n"
+ " this maybe the result of an error in citserver or an external influence.\n"
+ " You can get more information on this by enabling coredumping; for more information see\n"
+ " http://citadel.org/doku.php/faq:mastering_your_os:gdb#how.do.i.make.my.system.produce.core-files\n"
+ " If you already did, the file you're looking for most probably is %score.%d\n"
+ " Yours faithfully...",
+ ctdl_run_dir, ForkedPid);
+ aide_message(ChrPtr(CrashMail), "Citadel server crashed.");
+ FreeStrBuf(&CrashMail);
+ }
+}
+
+
/*
* Generic routine to convert a login name to a full name (gecos)
* Returns nonzero if a conversion took place
-
-
/*
* Bind a thread to a context. (It's inline merely to speed things up.)
*/
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