Home | History | Annotate | Line # | Download | only in ftpd
logwtmp.c revision 1.14 
      1 /*	$NetBSD: logwtmp.c,v 1.14 2000/03/05 06:12:19 lukem Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     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.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *	This product includes software developed by the University of
     18  *	California, Berkeley and its contributors.
     19  * 4. Neither the name of the University nor the names of its contributors
     20  *    may be used to endorse or promote products derived from this software
     21  *    without specific prior written permission.
     22  *
     23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     33  * SUCH DAMAGE.
     34  *
     35  */
     36 
     37 
     38 #include <sys/cdefs.h>
     39 #ifndef lint
     40 #if 0
     41 static char sccsid[] = "@(#)logwtmp.c	8.1 (Berkeley) 6/4/93";
     42 #else
     43 __RCSID("$NetBSD: logwtmp.c,v 1.14 2000/03/05 06:12:19 lukem Exp $");
     44 #endif
     45 #endif /* not lint */
     46 
     47 #include <sys/types.h>
     48 #include <sys/param.h>
     49 #include <sys/time.h>
     50 #include <sys/stat.h>
     51 
     52 #include <fcntl.h>
     53 #include <setjmp.h>
     54 #include <signal.h>
     55 #include <stdio.h>
     56 #include <string.h>
     57 #include <time.h>
     58 #include <unistd.h>
     59 #include <utmp.h>
     60 
     61 #ifdef KERBEROS5
     62 #include <krb5/krb5.h>
     63 #endif
     64 
     65 #include "extern.h"
     66 
     67 static int fd = -1;
     68 
     69 /*
     70  * Modified version of logwtmp that holds wtmp file open
     71  * after first call, for use with ftp (which may chroot
     72  * after login, but before logout).
     73  */
     74 void
     75 logwtmp(line, name, host)
     76 	const char *line, *name, *host;
     77 {
     78 	struct utmp ut;
     79 	struct stat buf;
     80 
     81 	if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
     82 		return;
     83 	if (fstat(fd, &buf) == 0) {
     84 		(void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
     85 		(void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
     86 		(void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
     87 		(void)time(&ut.ut_time);
     88 		if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
     89 		    sizeof(struct utmp))
     90 			(void)ftruncate(fd, buf.st_size);
     91 	}
     92 }
     93