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logwtmp.c revision 1.23 
      1 /*	$NetBSD: logwtmp.c,v 1.23 2004/11/11 01:14:10 christos 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. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  */
     32 
     33 
     34 #include <sys/cdefs.h>
     35 #ifndef lint
     36 #if 0
     37 static char sccsid[] = "@(#)logwtmp.c	8.1 (Berkeley) 6/4/93";
     38 #else
     39 __RCSID("$NetBSD: logwtmp.c,v 1.23 2004/11/11 01:14:10 christos Exp $");
     40 #endif
     41 #endif /* not lint */
     42 
     43 #include <sys/types.h>
     44 #include <sys/param.h>
     45 #include <sys/time.h>
     46 #include <sys/stat.h>
     47 #include <sys/wait.h>
     48 
     49 #include <fcntl.h>
     50 #include <signal.h>
     51 #include <stdio.h>
     52 #include <string.h>
     53 #include <time.h>
     54 #include <unistd.h>
     55 #include <utmp.h>
     56 #ifdef SUPPORT_UTMPX
     57 #include <utmpx.h>
     58 #endif
     59 #include <util.h>
     60 
     61 #ifdef KERBEROS5
     62 #include <krb5/krb5.h>
     63 #endif
     64 
     65 #include "extern.h"
     66 
     67 static int fd = -1;
     68 #ifdef SUPPORT_UTMPX
     69 static int fdx = -1;
     70 #endif
     71 
     72 /*
     73  * Modified version of logwtmp that holds wtmp file open
     74  * after first call, for use with ftp (which may chroot
     75  * after login, but before logout).
     76  */
     77 void
     78 ftpd_logwtmp(const char *line, const char *name, const char *host)
     79 {
     80 	struct utmp ut;
     81 	struct stat buf;
     82 
     83 	if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
     84 		return;
     85 	if (fstat(fd, &buf) == 0) {
     86 		(void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
     87 		(void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
     88 		(void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
     89 		(void)time(&ut.ut_time);
     90 		if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
     91 		    sizeof(struct utmp))
     92 			(void)ftruncate(fd, buf.st_size);
     93 	}
     94 }
     95 
     96 #ifdef SUPPORT_UTMPX
     97 void
     98 ftpd_logwtmpx(const char *line, const char *name, const char *host,
     99     struct sockinet *haddr, int status, int utx_type)
    100 {
    101 	struct utmpx ut;
    102 	struct stat buf;
    103 
    104 	if (fdx < 0 && (fdx = open(_PATH_WTMPX, O_WRONLY|O_APPEND, 0)) < 0)
    105 		return;
    106 	if (fstat(fdx, &buf) == 0) {
    107 		(void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
    108 		(void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
    109 		(void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
    110 		if (haddr)
    111 			(void)memcpy(&ut.ut_ss, &haddr->si_su, haddr->su_len);
    112 		else
    113 			(void)memset(&ut.ut_ss, 0, sizeof(ut.ut_ss));
    114 		ut.ut_type = utx_type;
    115 		if (WIFEXITED(status))
    116 			ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status);
    117 		if (WIFSIGNALED(status))
    118 		ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status);
    119 		(void)gettimeofday(&ut.ut_tv, NULL);
    120 		if(write(fdx, (char *)&ut, sizeof(struct utmpx)) !=
    121 		    sizeof(struct utmpx))
    122 			(void)ftruncate(fdx, buf.st_size);
    123 	}
    124 }
    125 #endif
    126