2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2009 Ed Schouten <ed@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
41 #define _PATH_ULOG_HELPER "/usr/libexec/ulog-helper"
44 * Registering login sessions.
48 ulog_exec_helper(int fd, char const * const argv[])
50 sigset_t oblock, nblock;
56 sigaddset(&nblock, SIGCHLD);
57 sigprocmask(SIG_BLOCK, &nblock, &oblock);
59 switch (pid = fork()) {
63 /* Execute helper program. */
64 if (dup2(fd, STDIN_FILENO) == -1)
66 sigprocmask(SIG_SETMASK, &oblock, NULL);
67 execv(_PATH_ULOG_HELPER, __DECONST(char * const *, argv));
70 /* Wait for helper to finish. */
72 wpid = waitpid(pid, &status, 0);
73 } while (wpid == -1 && errno == EINTR);
77 sigprocmask(SIG_SETMASK, &oblock, NULL);
81 ulog_login_pseudo(int fd, const char *host)
83 char const * const args[4] = { "ulog-helper", "login", host, NULL };
85 ulog_exec_helper(fd, args);
89 ulog_logout_pseudo(int fd)
91 char const * const args[3] = { "ulog-helper", "logout", NULL };
93 ulog_exec_helper(fd, args);