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/*
Unix SMB/CIFS implementation.
Main SMB server routines
Copyright (C) Andrew Tridgell 1992-2005
Copyright (C) Martin Pool 2002
Copyright (C) Jelmer Vernooij 2002
Copyright (C) James J Myers 2003 <myersjj@samba.org>
Copyright (C) Simo Sorce 2008
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, see <http://www.gnu.org/licenses/>.
*/
#include <stdbool.h>
#include <unistd.h>
#include <popt.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "util/util.h"
#include "../events/events.h"
#include "../ldb/include/ldb.h"
#include "service.h"
#include "confdb/confdb.h"
#include "providers/providers.h"
#include "monitor.h"
extern void monitor_task_init(struct task_server *task);
extern void nss_task_init(struct task_server *task);
static void sig_hup(int sig)
{
/* cycle log/debug files */
return;
}
static void sig_term(int sig)
{
#if HAVE_GETPGRP
static int done_sigterm;
if (done_sigterm == 0 && getpgrp() == getpid()) {
DEBUG(0,("SIGTERM: killing children\n"));
done_sigterm = 1;
kill(-getpgrp(), SIGTERM);
}
#endif
exit(0);
}
/*
setup signal masks
*/
static void setup_signals(void)
{
/* we are never interested in SIGPIPE */
BlockSignals(true, SIGPIPE);
#if defined(SIGFPE)
/* we are never interested in SIGFPE */
BlockSignals(true, SIGFPE);
#endif
/* We are no longer interested in USR1 */
BlockSignals(true, SIGUSR1);
#if defined(SIGUSR2)
/* We are no longer interested in USR2 */
BlockSignals(true, SIGUSR2);
#endif
/* POSIX demands that signals are inherited. If the invoking process has
* these signals masked, we will have problems, as we won't recieve them. */
BlockSignals(false, SIGHUP);
BlockSignals(false, SIGTERM);
CatchSignal(SIGHUP, sig_hup);
CatchSignal(SIGTERM, sig_term);
}
/*
handle io on stdin
*/
static void server_stdin_handler(struct event_context *event_ctx, struct fd_event *fde,
uint16_t flags, void *private)
{
const char *binary_name = (const char *)private;
uint8_t c;
if (read(0, &c, 1) == 0) {
DEBUG(0,("%s: EOF on stdin - terminating\n", binary_name));
#if HAVE_GETPGRP
if (getpgrp() == getpid()) {
kill(-getpgrp(), SIGTERM);
}
#endif
exit(0);
}
}
/*
main server.
*/
int main(int argc, const char *argv[])
{
bool opt_daemon = false;
bool opt_interactive = false;
int opt;
poptContext pc;
struct event_context *event_ctx;
struct confdb_ctx *confdb_ctx;
TALLOC_CTX *mem_ctx;
uint16_t stdin_event_flags;
int status;
enum {
OPT_DAEMON = 1000,
OPT_INTERACTIVE
};
struct poptOption long_options[] = {
POPT_AUTOHELP
{"daemon", 'D', POPT_ARG_NONE, NULL, OPT_DAEMON,
"Become a daemon (default)", NULL },
{"interactive", 'i', POPT_ARG_NONE, NULL, OPT_INTERACTIVE,
"Run interactive (not a daemon)", NULL},
{ NULL }
};
pc = poptGetContext(argv[0], argc, argv, long_options, 0);
while((opt = poptGetNextOpt(pc)) != -1) {
switch(opt) {
case OPT_DAEMON:
opt_daemon = true;
break;
case OPT_INTERACTIVE:
opt_interactive = true;
break;
default:
fprintf(stderr, "\nInvalid option %s: %s\n\n",
poptBadOption(pc, 0), poptStrerror(opt));
poptPrintUsage(pc, stderr, 0);
exit(1);
}
}
if (opt_daemon && opt_interactive) {
fprintf(stderr,"\nERROR: "
"Option -i|--interactive is not allowed together with -D|--daemon\n\n");
poptPrintUsage(pc, stderr, 0);
exit(1);
} else if (!opt_interactive) {
/* default is --daemon */
opt_daemon = true;
}
poptFreeContext(pc);
setup_signals();
/* we want default permissions on created files to be very strict,
so set our umask to 0177 */
umask(0177);
if (opt_daemon) {
DEBUG(3,("Becoming a daemon.\n"));
become_daemon(true);
}
/* pidfile_create(PID_DIR, argv[0]); */
/* the event context is the top level structure in smbd. Everything else
should hang off that */
event_ctx = event_context_init(talloc_autofree_context());
if (event_ctx == NULL) {
DEBUG(0,("The event context initialiaziton failed\n"));
return 1;
}
mem_ctx = talloc_new(event_ctx);
if (mem_ctx == NULL) {
DEBUG(0,("Out of memory, aborting!\n"));
return 1;
}
status = confdb_init(mem_ctx, event_ctx, &confdb_ctx);
if (status != EOK) {
DEBUG(0,("The confdb initialization failed\n"));
return 1;
}
if (opt_interactive) {
/* terminate when stdin goes away */
stdin_event_flags = EVENT_FD_READ;
} else {
/* stay alive forever */
stdin_event_flags = 0;
}
/* catch EOF on stdin */
#ifdef SIGTTIN
signal(SIGTTIN, SIG_IGN);
#endif
event_add_fd(event_ctx, event_ctx, 0, stdin_event_flags,
server_stdin_handler,
discard_const(argv[0]));
/* Services */
register_server_service("nss", nss_task_init);
register_server_service("dp", dp_task_init);
/* the monitor starts the services */
status = start_monitor(mem_ctx, event_ctx, confdb_ctx);
if (status != EOK) {
return 1;
}
/* wait for events - this is where smbd sits for most of its
life */
event_loop_wait(event_ctx);
/* as everything hangs off this event context, freeing it
should initiate a clean shutdown of all services */
talloc_free(event_ctx);
return 0;
}
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