1
0
mirror of https://github.com/samba-team/samba.git synced 2024-12-25 23:21:54 +03:00
samba-mirror/source4/smbd/server.c
Andrew Tridgell 28c1e4d3eb s4-modules: get rid of the remaining static prototypes for modules
the waf build now generates the prototype declarations for us
2010-11-01 18:55:19 +11:00

479 lines
12 KiB
C

/*
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>
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 "includes.h"
#include "lib/events/events.h"
#include "version.h"
#include "lib/cmdline/popt_common.h"
#include "system/dir.h"
#include "system/filesys.h"
#include "ntvfs/ntvfs.h"
#include "ntptr/ntptr.h"
#include "auth/gensec/gensec.h"
#include "libcli/auth/schannel.h"
#include "smbd/process_model.h"
#include "param/secrets.h"
#include "smbd/pidfile.h"
#include "param/param.h"
#include "dsdb/samdb/samdb.h"
#include "auth/session.h"
#include "lib/messaging/irpc.h"
#include "librpc/gen_ndr/ndr_irpc.h"
#include "cluster/cluster.h"
#include "dynconfig/dynconfig.h"
/*
recursively delete a directory tree
*/
static void recursive_delete(const char *path)
{
DIR *dir;
struct dirent *de;
dir = opendir(path);
if (!dir) {
return;
}
for (de=readdir(dir);de;de=readdir(dir)) {
char *fname;
struct stat st;
if (ISDOT(de->d_name) || ISDOTDOT(de->d_name)) {
continue;
}
fname = talloc_asprintf(path, "%s/%s", path, de->d_name);
if (stat(fname, &st) != 0) {
continue;
}
if (S_ISDIR(st.st_mode)) {
recursive_delete(fname);
talloc_free(fname);
continue;
}
if (unlink(fname) != 0) {
DEBUG(0,("Unabled to delete '%s' - %s\n",
fname, strerror(errno)));
smb_panic("unable to cleanup tmp files");
}
talloc_free(fname);
}
closedir(dir);
}
/*
cleanup temporary files. This is the new alternative to
TDB_CLEAR_IF_FIRST. Unfortunately TDB_CLEAR_IF_FIRST is not
efficient on unix systems due to the lack of scaling of the byte
range locking system. So instead of putting the burden on tdb to
cleanup tmp files, this function deletes them.
*/
static void cleanup_tmp_files(struct loadparm_context *lp_ctx)
{
char *path;
TALLOC_CTX *mem_ctx = talloc_new(NULL);
path = smbd_tmp_path(mem_ctx, lp_ctx, NULL);
recursive_delete(path);
talloc_free(mem_ctx);
}
static void sig_hup(int sig)
{
debug_schedule_reopen_logs();
}
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
DEBUG(0,("Exiting pid %d on SIGTERM\n", (int)getpid()));
exit(127);
}
/*
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 receive 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 tevent_context *event_ctx, struct tevent_fd *fde,
uint16_t flags, void *private_data)
{
const char *binary_name = (const char *)private_data;
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()) {
DEBUG(0,("Sending SIGTERM from pid %d\n", (int)getpid()));
kill(-getpgrp(), SIGTERM);
}
#endif
exit(0);
}
}
/*
die if the user selected maximum runtime is exceeded
*/
_NORETURN_ static void max_runtime_handler(struct tevent_context *ev,
struct tevent_timer *te,
struct timeval t, void *private_data)
{
const char *binary_name = (const char *)private_data;
DEBUG(0,("%s: maximum runtime exceeded - terminating\n", binary_name));
exit(0);
}
/*
pre-open the key databases. This saves a lot of time in child
processes
*/
static void prime_ldb_databases(struct tevent_context *event_ctx)
{
TALLOC_CTX *db_context;
db_context = talloc_new(event_ctx);
samdb_connect(db_context, event_ctx, cmdline_lp_ctx, system_session(cmdline_lp_ctx), 0);
privilege_connect(db_context, event_ctx, cmdline_lp_ctx);
/* we deliberately leave these open, which allows them to be
* re-used in ldb_wrap_connect() */
}
/*
called when a fatal condition occurs in a child task
*/
static NTSTATUS samba_terminate(struct irpc_message *msg,
struct samba_terminate *r)
{
DEBUG(0,("samba_terminate: %s\n", r->in.reason));
exit(1);
}
/*
setup messaging for the top level samba (parent) task
*/
static NTSTATUS setup_parent_messaging(struct tevent_context *event_ctx,
struct loadparm_context *lp_ctx)
{
struct messaging_context *msg;
NTSTATUS status;
msg = messaging_init(talloc_autofree_context(),
lpcfg_messaging_path(event_ctx, lp_ctx),
cluster_id(0, SAMBA_PARENT_TASKID), event_ctx);
NT_STATUS_HAVE_NO_MEMORY(msg);
irpc_add_name(msg, "samba");
status = IRPC_REGISTER(msg, irpc, SAMBA_TERMINATE,
samba_terminate, NULL);
return status;
}
/*
show build info
*/
static void show_build(void)
{
#define CONFIG_OPTION(n) { #n, dyn_ ## n }
struct {
const char *name;
const char *value;
} config_options[] = {
CONFIG_OPTION(BINDIR),
CONFIG_OPTION(SBINDIR),
CONFIG_OPTION(CONFIGFILE),
CONFIG_OPTION(NCALRPCDIR),
CONFIG_OPTION(LOGFILEBASE),
CONFIG_OPTION(LMHOSTSFILE),
CONFIG_OPTION(DATADIR),
CONFIG_OPTION(MODULESDIR),
CONFIG_OPTION(LOCKDIR),
CONFIG_OPTION(PIDDIR),
CONFIG_OPTION(PRIVATE_DIR),
CONFIG_OPTION(SWATDIR),
CONFIG_OPTION(SETUPDIR),
CONFIG_OPTION(WINBINDD_SOCKET_DIR),
CONFIG_OPTION(WINBINDD_PRIVILEGED_SOCKET_DIR),
CONFIG_OPTION(NTP_SIGND_SOCKET_DIR),
{ NULL, NULL}
};
int i;
printf("Samba version: %s\n", SAMBA_VERSION_STRING);
printf("Build environment:\n");
#ifdef BUILD_SYSTEM
printf(" Build host: %s\n", BUILD_SYSTEM);
#endif
printf("Paths:\n");
for (i=0; config_options[i].name; i++) {
printf(" %s: %s\n", config_options[i].name, config_options[i].value);
}
exit(0);
}
/*
main server.
*/
static int binary_smbd_main(const char *binary_name, int argc, const char *argv[])
{
bool opt_daemon = false;
bool opt_interactive = false;
int opt;
poptContext pc;
#define _MODULE_PROTO(init) extern NTSTATUS init(void);
STATIC_service_MODULES_PROTO;
init_module_fn static_init[] = { STATIC_service_MODULES };
init_module_fn *shared_init;
struct tevent_context *event_ctx;
uint16_t stdin_event_flags;
NTSTATUS status;
const char *model = "standard";
int max_runtime = 0;
enum {
OPT_DAEMON = 1000,
OPT_INTERACTIVE,
OPT_PROCESS_MODEL,
OPT_SHOW_BUILD
};
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},
{"model", 'M', POPT_ARG_STRING, NULL, OPT_PROCESS_MODEL,
"Select process model", "MODEL"},
{"maximum-runtime",0, POPT_ARG_INT, &max_runtime, 0,
"set maximum runtime of the server process, till autotermination", "seconds"},
{"show-build", 'b', POPT_ARG_NONE, NULL, OPT_SHOW_BUILD, "show build info", NULL },
POPT_COMMON_SAMBA
POPT_COMMON_VERSION
{ NULL }
};
pc = poptGetContext(binary_name, 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;
case OPT_PROCESS_MODEL:
model = poptGetOptArg(pc);
break;
case OPT_SHOW_BUILD:
show_build();
break;
default:
fprintf(stderr, "\nInvalid option %s: %s\n\n",
poptBadOption(pc, 0), poptStrerror(opt));
poptPrintUsage(pc, stderr, 0);
return 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);
return 1;
} else if (!opt_interactive) {
/* default is --daemon */
opt_daemon = true;
}
poptFreeContext(pc);
setup_logging(binary_name, opt_interactive?DEBUG_STDOUT:DEBUG_FILE);
setup_signals();
/* we want total control over the permissions on created files,
so set our umask to 0 */
umask(0);
DEBUG(0,("%s version %s started.\n", binary_name, SAMBA_VERSION_STRING));
DEBUGADD(0,("Copyright Andrew Tridgell and the Samba Team 1992-2010\n"));
if (sizeof(uint16_t) < 2 || sizeof(uint32_t) < 4 || sizeof(uint64_t) < 8) {
DEBUG(0,("ERROR: Samba is not configured correctly for the word size on your machine\n"));
DEBUGADD(0,("sizeof(uint16_t) = %u, sizeof(uint32_t) %u, sizeof(uint64_t) = %u\n",
(unsigned int)sizeof(uint16_t), (unsigned int)sizeof(uint32_t), (unsigned int)sizeof(uint64_t)));
return 1;
}
if (opt_daemon) {
DEBUG(3,("Becoming a daemon.\n"));
become_daemon(true, false, false);
}
cleanup_tmp_files(cmdline_lp_ctx);
if (!directory_exist(lpcfg_lockdir(cmdline_lp_ctx))) {
mkdir(lpcfg_lockdir(cmdline_lp_ctx), 0755);
}
pidfile_create(lpcfg_piddir(cmdline_lp_ctx), binary_name);
/* Do *not* remove this, until you have removed
* passdb/secrets.c, and proved that Samba still builds... */
/* Setup the SECRETS subsystem */
if (secrets_init(talloc_autofree_context(), cmdline_lp_ctx) == NULL) {
return 1;
}
if (lpcfg_server_role(cmdline_lp_ctx) == ROLE_DOMAIN_CONTROLLER) {
if (!open_schannel_session_store(talloc_autofree_context(), lpcfg_private_dir(cmdline_lp_ctx))) {
DEBUG(0,("ERROR: Samba cannot open schannel store for secured NETLOGON operations.\n"));
exit(1);
}
}
gensec_init(cmdline_lp_ctx); /* FIXME: */
ntptr_init(cmdline_lp_ctx); /* FIXME: maybe run this in the initialization function
of the spoolss RPC server instead? */
ntvfs_init(cmdline_lp_ctx); /* FIXME: maybe run this in the initialization functions
of the SMB[,2] server instead? */
process_model_init(cmdline_lp_ctx);
shared_init = load_samba_modules(NULL, cmdline_lp_ctx, "service");
run_init_functions(static_init);
run_init_functions(shared_init);
talloc_free(shared_init);
/* the event context is the top level structure in smbd. Everything else
should hang off that */
event_ctx = s4_event_context_init(talloc_autofree_context());
if (event_ctx == NULL) {
DEBUG(0,("Initializing event context failed\n"));
return 1;
}
if (opt_interactive) {
/* terminate when stdin goes away */
stdin_event_flags = TEVENT_FD_READ;
} else {
/* stay alive forever */
stdin_event_flags = 0;
}
/* catch EOF on stdin */
#ifdef SIGTTIN
signal(SIGTTIN, SIG_IGN);
#endif
tevent_add_fd(event_ctx, event_ctx, 0, stdin_event_flags,
server_stdin_handler,
discard_const(binary_name));
if (max_runtime) {
tevent_add_timer(event_ctx, event_ctx,
timeval_current_ofs(max_runtime, 0),
max_runtime_handler,
discard_const(binary_name));
}
prime_ldb_databases(event_ctx);
status = setup_parent_messaging(event_ctx, cmdline_lp_ctx);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Failed to setup parent messaging - %s\n", nt_errstr(status)));
return 1;
}
DEBUG(0,("%s: using '%s' process model\n", binary_name, model));
status = server_service_startup(event_ctx, cmdline_lp_ctx, model,
lpcfg_server_services(cmdline_lp_ctx));
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("Starting Services failed - %s\n", nt_errstr(status)));
return 1;
}
/* wait for events - this is where smbd sits for most of its
life */
tevent_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;
}
int main(int argc, const char *argv[])
{
return binary_smbd_main("samba", argc, argv);
}