1*eb7c1594Sagc /* $NetBSD: logwtmp.c,v 1.14 2003/08/07 16:44:59 agc Exp $ */
2f5646a08Schristos
361f28255Scgd /*
43a724adbScgd * Copyright (c) 1988, 1993
53a724adbScgd * The Regents of the University of California. All rights reserved.
661f28255Scgd *
761f28255Scgd * Redistribution and use in source and binary forms, with or without
861f28255Scgd * modification, are permitted provided that the following conditions
961f28255Scgd * are met:
1061f28255Scgd * 1. Redistributions of source code must retain the above copyright
1161f28255Scgd * notice, this list of conditions and the following disclaimer.
1261f28255Scgd * 2. Redistributions in binary form must reproduce the above copyright
1361f28255Scgd * notice, this list of conditions and the following disclaimer in the
1461f28255Scgd * documentation and/or other materials provided with the distribution.
15*eb7c1594Sagc * 3. Neither the name of the University nor the names of its contributors
1661f28255Scgd * may be used to endorse or promote products derived from this software
1761f28255Scgd * without specific prior written permission.
1861f28255Scgd *
1961f28255Scgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2061f28255Scgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2161f28255Scgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2261f28255Scgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2361f28255Scgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2461f28255Scgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2561f28255Scgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2661f28255Scgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2761f28255Scgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2861f28255Scgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
2961f28255Scgd * SUCH DAMAGE.
3061f28255Scgd */
3161f28255Scgd
32f5646a08Schristos #include <sys/cdefs.h>
3361f28255Scgd #if defined(LIBC_SCCS) && !defined(lint)
34e42a9484Sjtc #if 0
35e42a9484Sjtc static char sccsid[] = "@(#)logwtmp.c 8.1 (Berkeley) 6/4/93";
36e42a9484Sjtc #else
37*eb7c1594Sagc __RCSID("$NetBSD: logwtmp.c,v 1.14 2003/08/07 16:44:59 agc Exp $");
38e42a9484Sjtc #endif
3961f28255Scgd #endif /* LIBC_SCCS and not lint */
4061f28255Scgd
4161f28255Scgd #include <sys/types.h>
4261f28255Scgd #include <sys/file.h>
4361f28255Scgd #include <sys/time.h>
4461f28255Scgd #include <sys/stat.h>
453a724adbScgd
46b48252f3Slukem #include <assert.h>
478347998aSpk #include <string.h>
4834c4557dSkleink #include <time.h>
493a724adbScgd #include <unistd.h>
5061f28255Scgd #include <utmp.h>
51e42a9484Sjtc #include <util.h>
528347998aSpk
538347998aSpk void
logwtmp(const char * line,const char * name,const char * host)54fce98185Sad logwtmp(const char *line, const char *name, const char *host)
5561f28255Scgd {
5661f28255Scgd struct utmp ut;
5761f28255Scgd struct stat buf;
5861f28255Scgd int fd;
5961f28255Scgd
60b48252f3Slukem _DIAGASSERT(line != NULL);
61b48252f3Slukem _DIAGASSERT(name != NULL);
62b48252f3Slukem _DIAGASSERT(host != NULL);
63b48252f3Slukem
6461f28255Scgd if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
6561f28255Scgd return;
6661f28255Scgd if (fstat(fd, &buf) == 0) {
6761f28255Scgd (void) strncpy(ut.ut_line, line, sizeof(ut.ut_line));
6861f28255Scgd (void) strncpy(ut.ut_name, name, sizeof(ut.ut_name));
6961f28255Scgd (void) strncpy(ut.ut_host, host, sizeof(ut.ut_host));
7061f28255Scgd (void) time(&ut.ut_time);
71983a6b1fSchristos if (write(fd, &ut, sizeof(struct utmp)) != sizeof(struct utmp))
7261f28255Scgd (void) ftruncate(fd, buf.st_size);
7361f28255Scgd }
7461f28255Scgd (void) close(fd);
7561f28255Scgd }
76