| /* $OpenBSD: login.c,v 1.5 1998/07/13 02:11:12 millert 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. All advertising materials mentioning features or use of this software |
| * must display the following acknowledgement: |
| * This product includes software developed by the University of |
| * California, Berkeley and its contributors. |
| * 4. 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 "config.h" |
| #ifndef HAVE_LOGIN |
| |
| #if defined(LIBC_SCCS) && !defined(lint) |
| /* from: static char sccsid[] = "@(#)login.c 8.1 (Berkeley) 6/4/93"; */ |
| static char *rcsid = "$OpenBSD: login.c,v 1.5 1998/07/13 02:11:12 millert Exp $"; |
| #endif /* LIBC_SCCS and not lint */ |
| |
| #include <sys/types.h> |
| |
| #include <fcntl.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #ifdef HAVE_UTMPX_H |
| # include <utmpx.h> |
| #endif |
| #ifdef HAVE_UTMP_H |
| # include <utmp.h> |
| #endif |
| #include <stdio.h> |
| |
| void |
| login(utp) |
| struct UTMP_STR *utp; |
| { |
| struct UTMP_STR old_ut; |
| register int fd; |
| int tty; |
| |
| #ifndef UT_LINESIZE |
| # define UT_LINESIZE (sizeof(old_ut.ut_line)) |
| # ifdef HAVE_UTMPX_H |
| # define UT_NAMESIZE (sizeof(old_ut.ut_user)) |
| # else |
| # define UT_NAMESIZE (sizeof(old_ut.ut_name)) |
| # endif |
| # ifdef HAVE_HOST_IN_UTMP |
| # define UT_HOSTSIZE (sizeof(old_ut.ut_host)) |
| # endif |
| # ifdef HAVE_HOST_IN_UTMPX |
| # define UT_HOSTSIZE (sizeof(old_ut.ut_host)) |
| # endif |
| #endif |
| |
| tty = ttyslot(); |
| if (tty > 0 && (fd = open(_PATH_UTMP, O_RDWR|O_CREAT, 0644)) >= 0) { |
| #ifdef HAVE_HOST_IN_UTMP || HAVE_HOST_IN_UTMPX |
| (void)lseek(fd, (off_t)(tty * sizeof(struct UTMP_STR)), SEEK_SET); |
| /* |
| * Prevent luser from zero'ing out ut_host. |
| * If the new ut_line is empty but the old one is not |
| * and ut_line and ut_name match, preserve the old ut_line. |
| */ |
| if (read(fd, &old_ut, sizeof(struct UTMP_STR)) == |
| sizeof(struct UTMP_STR) && utp->ut_host[0] == '\0' && |
| old_ut.ut_host[0] != '\0' && |
| strncmp(old_ut.ut_line, utp->ut_line, UT_LINESIZE) == 0 && |
| strncmp(old_ut.ut_name, utp->ut_name, UT_NAMESIZE) == 0) |
| (void)memcpy(utp->ut_host, old_ut.ut_host, UT_HOSTSIZE); |
| #endif /* HAVE_HOST_IN_UTMP || HAVE_HOST_IN_UTMPX */ |
| (void)lseek(fd, (off_t)(tty * sizeof(struct UTMP_STR)), SEEK_SET); |
| (void)write(fd, utp, sizeof(struct UTMP_STR)); |
| (void)close(fd); |
| } |
| if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) >= 0) { |
| (void)write(fd, utp, sizeof(struct UTMP_STR)); |
| (void)close(fd); |
| } |
| } |
| |
| #endif /* HAVE_LOGIN */ |