/* Unix SMB/CIFS implementation. process model: onefork (1 child process) Copyright (C) Andrew Tridgell 1992-2005 Copyright (C) James J Myers 2003 <myersjj@samba.org> Copyright (C) Stefan (metze) Metzmacher 2004 Copyright (C) Andrew Bartlett 2008 <abartlet@samba.org> Copyright (C) David Disseldorp 2008 <ddiss@sgi.com> 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 "lib/socket/socket.h" #include "smbd/process_model.h" #include "system/filesys.h" #include "cluster/cluster.h" #include "param/param.h" #include "ldb_wrap.h" #ifdef HAVE_SETPROCTITLE #ifdef HAVE_SETPROCTITLE_H #include <setproctitle.h> #endif #else #define setproctitle none_setproctitle static int none_setproctitle(const char *fmt, ...) PRINTF_ATTRIBUTE(1, 2); static int none_setproctitle(const char *fmt, ...) { return 0; } #endif NTSTATUS process_model_onefork_init(void); /* called when the process model is selected */ static void onefork_model_init(void) { signal(SIGCHLD, SIG_IGN); } static void onefork_reload_after_fork(void) { ldb_wrap_fork_hook(); /* Ensure that the forked children do not expose identical random streams */ set_need_random_reseed(); } /* called when a listening socket becomes readable. */ static void onefork_accept_connection(struct tevent_context *ev, struct loadparm_context *lp_ctx, struct socket_context *listen_socket, void (*new_conn)(struct tevent_context *, struct loadparm_context *, struct socket_context *, struct server_id , void *), void *private_data) { NTSTATUS status; struct socket_context *connected_socket; pid_t pid = getpid(); /* accept an incoming connection. */ status = socket_accept(listen_socket, &connected_socket); if (!NT_STATUS_IS_OK(status)) { return; } talloc_steal(private_data, connected_socket); new_conn(ev, lp_ctx, connected_socket, cluster_id(pid, socket_get_fd(connected_socket)), private_data); } /* called to create a new server task */ static void onefork_new_task(struct tevent_context *ev, struct loadparm_context *lp_ctx, const char *service_name, void (*new_task_fn)(struct tevent_context *, struct loadparm_context *lp_ctx, struct server_id , void *), void *private_data) { pid_t pid; pid = fork(); if (pid != 0) { /* parent or error code ... go back to the event loop */ return; } pid = getpid(); if (tevent_re_initialise(ev) != 0) { smb_panic("Failed to re-initialise tevent after fork"); } setproctitle("task %s server_id[%d]", service_name, (int)pid); onefork_reload_after_fork(); /* setup this new connection: process will bind to it's sockets etc */ new_task_fn(ev, lp_ctx, cluster_id(pid, 0), private_data); event_loop_wait(ev); talloc_free(ev); exit(0); } /* called when a task goes down */ static void onefork_terminate(struct tevent_context *ev, struct loadparm_context *lp_ctx, const char *reason) { DEBUG(2,("onefork_terminate: reason[%s]\n",reason)); } /* called to set a title of a task or connection */ static void onefork_set_title(struct tevent_context *ev, const char *title) { if (title) { setproctitle("%s", title); } else { setproctitle(NULL); } } static const struct model_ops onefork_ops = { .name = "onefork", .model_init = onefork_model_init, .accept_connection = onefork_accept_connection, .new_task = onefork_new_task, .terminate = onefork_terminate, .set_title = onefork_set_title, }; /* initialise the onefork process model, registering ourselves with the process model subsystem */ NTSTATUS process_model_onefork_init(void) { return register_process_model(&onefork_ops); }