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/*
* File Server Shadow-Copy Daemon
*
* Copyright (C) David Disseldorp 2012-2015
*
* Based on epmd.c:
* Copyright (c) 2011 Andreas Schneider <asn@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 "ntdomain.h"
#include "messages.h"
#include "librpc/rpc/dcerpc_ep.h"
#include "../librpc/gen_ndr/srv_fsrvp.h"
#include "rpc_server/rpc_server.h"
#include "rpc_server/rpc_sock_helper.h"
#include "rpc_server/fss/srv_fss_agent.h"
#include "rpc_server/fssd.h"
#define DAEMON_NAME "fssd"
void start_fssd(struct tevent_context *ev_ctx,
struct messaging_context *msg_ctx);
static void fssd_reopen_logs(void)
{
char *lfile = lp_logfile(NULL);
int rc;
if (lfile == NULL || lfile[0] == '\0') {
rc = asprintf(&lfile, "%s/log.%s", get_dyn_LOGFILEBASE(), DAEMON_NAME);
if (rc > 0) {
lp_set_logfile(lfile);
SAFE_FREE(lfile);
}
} else {
if (strstr(lfile, DAEMON_NAME) == NULL) {
rc = asprintf(&lfile, "%s.%s", lp_logfile(NULL), DAEMON_NAME);
if (rc > 0) {
lp_set_logfile(lfile);
SAFE_FREE(lfile);
}
}
}
reopen_logs();
}
static void fssd_smb_conf_updated(struct messaging_context *msg,
void *private_data,
uint32_t msg_type,
struct server_id server_id,
DATA_BLOB *data)
{
DEBUG(10, ("Got message saying smb.conf was updated. Reloading.\n"));
change_to_root_user();
fssd_reopen_logs();
}
static void fssd_sig_term_handler(struct tevent_context *ev,
struct tevent_signal *se,
int signum,
int count,
void *siginfo,
void *private_data)
{
rpc_FileServerVssAgent_shutdown();
exit_server_cleanly("termination signal");
}
static void fssd_setup_sig_term_handler(struct tevent_context *ev_ctx)
{
struct tevent_signal *se;
se = tevent_add_signal(ev_ctx,
ev_ctx,
SIGTERM, 0,
fssd_sig_term_handler,
NULL);
if (se == NULL) {
exit_server("failed to setup SIGTERM handler");
}
}
static void fssd_sig_hup_handler(struct tevent_context *ev,
struct tevent_signal *se,
int signum,
int count,
void *siginfo,
void *private_data)
{
change_to_root_user();
DEBUG(1,("reopening logs after SIGHUP\n"));
fssd_reopen_logs();
}
static void fssd_setup_sig_hup_handler(struct tevent_context *ev_ctx,
struct messaging_context *msg_ctx)
{
struct tevent_signal *se;
se = tevent_add_signal(ev_ctx,
ev_ctx,
SIGHUP, 0,
fssd_sig_hup_handler,
msg_ctx);
if (se == NULL) {
exit_server("failed to setup SIGHUP handler");
}
}
static bool fss_shutdown_cb(void *ptr)
{
srv_fssa_cleanup();
return true;
}
static bool fss_init_cb(void *ptr)
{
NTSTATUS status;
struct messaging_context *msg_ctx;
msg_ctx = talloc_get_type_abort(ptr, struct messaging_context);
status = srv_fssa_start(msg_ctx);
return NT_STATUS_IS_OK(status);
}
void start_fssd(struct tevent_context *ev_ctx,
struct messaging_context *msg_ctx)
{
struct rpc_srv_callbacks fss_cb;
NTSTATUS status;
pid_t pid;
bool ok;
int rc;
fss_cb.init = fss_init_cb;
fss_cb.shutdown = fss_shutdown_cb;
fss_cb.private_data = msg_ctx;
DEBUG(1, ("Forking File Server Shadow-copy Daemon\n"));
pid = fork();
if (pid == -1) {
DEBUG(0, ("failed to fork file server shadow-copy daemon [%s], "
"aborting ...\n", strerror(errno)));
exit(1);
}
if (pid) {
/* parent */
return;
}
/* child */
status = smbd_reinit_after_fork(msg_ctx, ev_ctx, true, NULL);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0,("reinit_after_fork() failed\n"));
smb_panic("reinit_after_fork() failed");
}
fssd_reopen_logs();
fssd_setup_sig_term_handler(ev_ctx);
fssd_setup_sig_hup_handler(ev_ctx, msg_ctx);
messaging_register(msg_ctx,
ev_ctx,
MSG_SMB_CONF_UPDATED,
fssd_smb_conf_updated);
status = rpc_FileServerVssAgent_init(&fss_cb);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Failed to register fssd rpc interface! (%s)\n",
nt_errstr(status)));
exit(1);
}
/* case is normalized by smbd on connection */
ok = setup_named_pipe_socket("fssagentrpc", ev_ctx, msg_ctx);
if (!ok) {
DEBUG(0, ("Failed to open fssd named pipe!\n"));
exit(1);
}
DEBUG(1, ("File Server Shadow-copy Daemon Started (%d)\n",
(int)getpid()));
/* loop forever */
rc = tevent_loop_wait(ev_ctx);
/* should not be reached */
DEBUG(0,("tevent_loop_wait() exited with %d - %s\n",
rc, (rc == 0) ? "out of events" : strerror(errno)));
exit(1);
}
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