/* $OpenBSD: logwtmp.c,v 1.9 2005/08/02 21:46:23 espie Exp $ */ /* * Copyright (c) 1988, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #include <sys/types.h> #include <sys/time.h> #include <sys/stat.h> #include <fcntl.h> #include <string.h> #include <unistd.h> #include <utmp.h> #include "util.h" void logwtmp(const char *line, const char *name, const char *host) { struct stat buf; struct utmp ut; int fd; if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0) return; if (fstat(fd, &buf) == 0) { (void) strncpy(ut.ut_line, line, sizeof(ut.ut_line)); (void) strncpy(ut.ut_name, name, sizeof(ut.ut_name)); (void) strncpy(ut.ut_host, host, sizeof(ut.ut_host)); (void) time(&ut.ut_time); if (write(fd, &ut, sizeof(struct utmp)) != sizeof(struct utmp)) (void) ftruncate(fd, buf.st_size); } (void) close(fd); }