12208eadfSEd Schouten /*- 22208eadfSEd Schouten * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org> 32208eadfSEd Schouten * All rights reserved. 42208eadfSEd Schouten * 52208eadfSEd Schouten * Redistribution and use in source and binary forms, with or without 62208eadfSEd Schouten * modification, are permitted provided that the following conditions 72208eadfSEd Schouten * are met: 82208eadfSEd Schouten * 1. Redistributions of source code must retain the above copyright 92208eadfSEd Schouten * notice, this list of conditions and the following disclaimer. 102208eadfSEd Schouten * 2. Redistributions in binary form must reproduce the above copyright 112208eadfSEd Schouten * notice, this list of conditions and the following disclaimer in the 122208eadfSEd Schouten * documentation and/or other materials provided with the distribution. 132208eadfSEd Schouten * 142208eadfSEd Schouten * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 152208eadfSEd Schouten * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 162208eadfSEd Schouten * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 172208eadfSEd Schouten * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 182208eadfSEd Schouten * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 192208eadfSEd Schouten * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 202208eadfSEd Schouten * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 212208eadfSEd Schouten * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 222208eadfSEd Schouten * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 232208eadfSEd Schouten * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 242208eadfSEd Schouten * SUCH DAMAGE. 252208eadfSEd Schouten */ 262208eadfSEd Schouten 272208eadfSEd Schouten #include <sys/cdefs.h> 282208eadfSEd Schouten __FBSDID("$FreeBSD$"); 292208eadfSEd Schouten 302208eadfSEd Schouten #include <sys/wait.h> 312208eadfSEd Schouten 322208eadfSEd Schouten #include <errno.h> 332208eadfSEd Schouten #include <signal.h> 342208eadfSEd Schouten #include <stdlib.h> 352208eadfSEd Schouten #include <sysexits.h> 362208eadfSEd Schouten #include <unistd.h> 372208eadfSEd Schouten 382208eadfSEd Schouten #include "ulog_internal.h" 392208eadfSEd Schouten 402208eadfSEd Schouten #define _PATH_ULOG_HELPER "/usr/libexec/ulog-helper" 412208eadfSEd Schouten 422208eadfSEd Schouten /* 432208eadfSEd Schouten * Registering login sessions. 442208eadfSEd Schouten */ 452208eadfSEd Schouten 462208eadfSEd Schouten static void 472208eadfSEd Schouten ulog_exec_helper(int fd, char const * const argv[]) 482208eadfSEd Schouten { 492208eadfSEd Schouten sigset_t oblock, nblock; 502208eadfSEd Schouten pid_t pid, wpid; 512208eadfSEd Schouten int status; 522208eadfSEd Schouten 532208eadfSEd Schouten /* Block SIGCHLD. */ 542208eadfSEd Schouten sigemptyset(&nblock); 552208eadfSEd Schouten sigaddset(&nblock, SIGCHLD); 562208eadfSEd Schouten sigprocmask(SIG_BLOCK, &nblock, &oblock); 572208eadfSEd Schouten 582208eadfSEd Schouten switch (pid = fork()) { 592208eadfSEd Schouten case -1: 602208eadfSEd Schouten break; 612208eadfSEd Schouten case 0: 622208eadfSEd Schouten /* Execute helper program. */ 632208eadfSEd Schouten if (dup2(fd, STDIN_FILENO) == -1) 642208eadfSEd Schouten exit(EX_UNAVAILABLE); 652208eadfSEd Schouten sigprocmask(SIG_SETMASK, &oblock, NULL); 662208eadfSEd Schouten execv(_PATH_ULOG_HELPER, __DECONST(char * const *, argv)); 672208eadfSEd Schouten exit(EX_UNAVAILABLE); 682208eadfSEd Schouten default: 692208eadfSEd Schouten /* Wait for helper to finish. */ 702208eadfSEd Schouten do { 712208eadfSEd Schouten wpid = waitpid(pid, &status, 0); 722208eadfSEd Schouten } while (wpid == -1 && errno == EINTR); 732208eadfSEd Schouten break; 742208eadfSEd Schouten } 752208eadfSEd Schouten 762208eadfSEd Schouten sigprocmask(SIG_SETMASK, &oblock, NULL); 772208eadfSEd Schouten } 782208eadfSEd Schouten 792208eadfSEd Schouten void 802208eadfSEd Schouten ulog_login_pseudo(int fd, const char *host) 812208eadfSEd Schouten { 822208eadfSEd Schouten char const * const args[4] = { "ulog-helper", "login", host, NULL }; 832208eadfSEd Schouten 842208eadfSEd Schouten ulog_exec_helper(fd, args); 852208eadfSEd Schouten } 862208eadfSEd Schouten 872208eadfSEd Schouten void 882208eadfSEd Schouten ulog_logout_pseudo(int fd) 892208eadfSEd Schouten { 902208eadfSEd Schouten char const * const args[3] = { "ulog-helper", "logout", NULL }; 912208eadfSEd Schouten 922208eadfSEd Schouten ulog_exec_helper(fd, args); 932208eadfSEd Schouten } 94