1200062Sed/*- 2200062Sed * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org> 3200062Sed * All rights reserved. 4200062Sed * 5200062Sed * Redistribution and use in source and binary forms, with or without 6200062Sed * modification, are permitted provided that the following conditions 7200062Sed * are met: 8200062Sed * 1. Redistributions of source code must retain the above copyright 9200062Sed * notice, this list of conditions and the following disclaimer. 10200062Sed * 2. Redistributions in binary form must reproduce the above copyright 11200062Sed * notice, this list of conditions and the following disclaimer in the 12200062Sed * documentation and/or other materials provided with the distribution. 13200062Sed * 14200062Sed * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15200062Sed * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16200062Sed * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17200062Sed * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18200062Sed * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19200062Sed * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20200062Sed * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21200062Sed * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22200062Sed * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23200062Sed * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24200062Sed * SUCH DAMAGE. 25200062Sed */ 26200062Sed 27200062Sed#include <sys/cdefs.h> 28200062Sed__FBSDID("$FreeBSD$"); 29200062Sed 30200062Sed#include <sys/wait.h> 31200062Sed 32200062Sed#include <errno.h> 33200062Sed#include <signal.h> 34200062Sed#include <stdlib.h> 35200062Sed#include <sysexits.h> 36200062Sed#include <unistd.h> 37202215Sed#include "ulog.h" 38200062Sed 39200062Sed#define _PATH_ULOG_HELPER "/usr/libexec/ulog-helper" 40200062Sed 41200062Sed/* 42200062Sed * Registering login sessions. 43200062Sed */ 44200062Sed 45200062Sedstatic void 46200062Sedulog_exec_helper(int fd, char const * const argv[]) 47200062Sed{ 48200062Sed sigset_t oblock, nblock; 49200062Sed pid_t pid, wpid; 50200062Sed int status; 51200062Sed 52200062Sed /* Block SIGCHLD. */ 53200062Sed sigemptyset(&nblock); 54200062Sed sigaddset(&nblock, SIGCHLD); 55200062Sed sigprocmask(SIG_BLOCK, &nblock, &oblock); 56200062Sed 57200062Sed switch (pid = fork()) { 58200062Sed case -1: 59200062Sed break; 60200062Sed case 0: 61200062Sed /* Execute helper program. */ 62200062Sed if (dup2(fd, STDIN_FILENO) == -1) 63200062Sed exit(EX_UNAVAILABLE); 64200062Sed sigprocmask(SIG_SETMASK, &oblock, NULL); 65200062Sed execv(_PATH_ULOG_HELPER, __DECONST(char * const *, argv)); 66200062Sed exit(EX_UNAVAILABLE); 67200062Sed default: 68200062Sed /* Wait for helper to finish. */ 69200062Sed do { 70200062Sed wpid = waitpid(pid, &status, 0); 71200062Sed } while (wpid == -1 && errno == EINTR); 72200062Sed break; 73200062Sed } 74200062Sed 75200062Sed sigprocmask(SIG_SETMASK, &oblock, NULL); 76200062Sed} 77200062Sed 78200062Sedvoid 79200062Sedulog_login_pseudo(int fd, const char *host) 80200062Sed{ 81200062Sed char const * const args[4] = { "ulog-helper", "login", host, NULL }; 82200062Sed 83200062Sed ulog_exec_helper(fd, args); 84200062Sed} 85200062Sed 86200062Sedvoid 87200062Sedulog_logout_pseudo(int fd) 88200062Sed{ 89200062Sed char const * const args[3] = { "ulog-helper", "logout", NULL }; 90200062Sed 91200062Sed ulog_exec_helper(fd, args); 92200062Sed} 93