/* Reopen the port handle when our pid changes. */ static int port_check_reopen(struct port_event_context *port_ev) { struct tevent_fd *fde; if (port_ev->pid == getpid()) { return 0; } close(port_ev->port_fd); port_ev->port_fd = port_create(); if (port_ev->port_fd == -1) { tevent_debug(port_ev->ev, TEVENT_DEBUG_FATAL, "port_create() failed"); return -1; } if (!ev_set_close_on_exec(port_ev->port_fd)) { tevent_debug(port_ev->ev, TEVENT_DEBUG_WARNING, "Failed to set close-on-exec, file descriptor may be leaked to children.\n"); } port_ev->pid = getpid(); for (fde=port_ev->ev->fd_events;fde;fde=fde->next) { fde->additional_flags &= PORT_ADDITIONAL_FD_FLAG_HAS_ASSOCIATION; if (port_update_event(port_ev, fde) != 0) { return -1; } } return 0; }
/* reopen the epoll handle when our pid changes see http://junkcode.samba.org/ftp/unpacked/junkcode/epoll_fork.c for an demonstration of why this is needed */ static void epoll_check_reopen(struct epoll_event_context *epoll_ev) { struct tevent_fd *fde; if (epoll_ev->pid == getpid()) { return; } close(epoll_ev->epoll_fd); epoll_ev->epoll_fd = epoll_create(64); if (epoll_ev->epoll_fd == -1) { tevent_debug(epoll_ev->ev, TEVENT_DEBUG_FATAL, "Failed to recreate epoll handle after fork\n"); return; } if (!ev_set_close_on_exec(epoll_ev->epoll_fd)) { tevent_debug(epoll_ev->ev, TEVENT_DEBUG_WARNING, "Failed to set close-on-exec, file descriptor may be leaked to children.\n"); } epoll_ev->pid = getpid(); for (fde=epoll_ev->ev->fd_events;fde;fde=fde->next) { epoll_add_event(epoll_ev, fde); } }
/* Init the port fd */ static int port_init_ctx(struct port_event_context *port_ev) { port_ev->port_fd = port_create(); if (port_ev->port_fd == -1) { tevent_debug(port_ev->ev, TEVENT_DEBUG_FATAL, "Failed to create port handle.\n"); return -1; } if (!ev_set_close_on_exec(port_ev->port_fd)) { tevent_debug(port_ev->ev, TEVENT_DEBUG_WARNING, "Failed to set close-on-exec, file descriptor may be leaked to children.\n"); } port_ev->pid = getpid(); talloc_set_destructor(port_ev, port_ctx_destructor); return 0; }
/* init the epoll fd */ static int epoll_init_ctx(struct epoll_event_context *epoll_ev) { epoll_ev->epoll_fd = epoll_create(64); if (epoll_ev->epoll_fd == -1) { tevent_debug(epoll_ev->ev, TEVENT_DEBUG_FATAL, "Failed to create epoll handle.\n"); return -1; } if (!ev_set_close_on_exec(epoll_ev->epoll_fd)) { tevent_debug(epoll_ev->ev, TEVENT_DEBUG_WARNING, "Failed to set close-on-exec, file descriptor may be leaked to children.\n"); } epoll_ev->pid = getpid(); talloc_set_destructor(epoll_ev, epoll_ctx_destructor); return 0; }
/* reopen the epoll handle when our pid changes see http://junkcode.samba.org/ftp/unpacked/junkcode/epoll_fork.c for an demonstration of why this is needed */ static void epoll_check_reopen(struct epoll_event_context *epoll_ev) { struct tevent_fd *fde; bool *caller_panic_state = epoll_ev->panic_state; bool panic_triggered = false; if (epoll_ev->pid == getpid()) { return; } close(epoll_ev->epoll_fd); epoll_ev->epoll_fd = epoll_create(64); if (epoll_ev->epoll_fd == -1) { epoll_panic(epoll_ev, "epoll_create() failed", false); return; } if (!ev_set_close_on_exec(epoll_ev->epoll_fd)) { tevent_debug(epoll_ev->ev, TEVENT_DEBUG_WARNING, "Failed to set close-on-exec, file descriptor may be leaked to children.\n"); } epoll_ev->pid = getpid(); epoll_ev->panic_state = &panic_triggered; for (fde=epoll_ev->ev->fd_events;fde;fde=fde->next) { fde->additional_flags &= ~EPOLL_ADDITIONAL_FD_FLAG_HAS_EVENT; epoll_update_event(epoll_ev, fde); if (panic_triggered) { if (caller_panic_state != NULL) { *caller_panic_state = true; } return; } } epoll_ev->panic_state = NULL; }
struct tevent_thread_proxy *tevent_thread_proxy_create( struct tevent_context *dest_ev_ctx) { int ret; int pipefds[2]; struct tevent_thread_proxy *tp; tp = talloc_zero(dest_ev_ctx, struct tevent_thread_proxy); if (tp == NULL) { return NULL; } ret = pthread_mutex_init(&tp->mutex, NULL); if (ret != 0) { goto fail; } tp->dest_ev_ctx = dest_ev_ctx; tp->read_fd = -1; tp->write_fd = -1; talloc_set_destructor(tp, tevent_thread_proxy_destructor); ret = pipe(pipefds); if (ret == -1) { goto fail; } tp->read_fd = pipefds[0]; tp->write_fd = pipefds[1]; ret = ev_set_blocking(pipefds[0], false); if (ret != 0) { goto fail; } ret = ev_set_blocking(pipefds[1], false); if (ret != 0) { goto fail; } if (!ev_set_close_on_exec(pipefds[0])) { goto fail; } if (!ev_set_close_on_exec(pipefds[1])) { goto fail; } tp->pipe_read_fde = tevent_add_fd(dest_ev_ctx, tp, tp->read_fd, TEVENT_FD_READ, pipe_read_handler, tp); if (tp->pipe_read_fde == NULL) { goto fail; } /* * Create an immediate event to free * completed lists. */ tp->free_im = tevent_create_immediate(tp); if (tp->free_im == NULL) { goto fail; } return tp; fail: TALLOC_FREE(tp); return NULL; }