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logwtmp.c revision 1.21 
      1 /*	$NetBSD: logwtmp.c,v 1.21 2003/08/07 09:46:40 agc 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 1.21 2003/08/07 09:46:40 agc 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 <setjmp.h>
     51 #include <signal.h>
     52 #include <stdio.h>
     53 #include <string.h>
     54 #include <time.h>
     55 #include <unistd.h>
     56 #include <utmp.h>
     57 #ifdef SUPPORT_UTMPX
     58 #include <utmpx.h>
     59 #endif
     60 #include <util.h>
     61 
     62 #ifdef KERBEROS5
     63 #include <krb5/krb5.h>
     64 #endif
     65 
     66 #include "extern.h"
     67 
     68 static int fd = -1;
     69 #ifdef SUPPORT_UTMPX
     70 static int fdx = -1;
     71 #endif
     72 
     73 /*
     74  * Modified version of logwtmp that holds wtmp file open
     75  * after first call, for use with ftp (which may chroot
     76  * after login, but before logout).
     77  */
     78 void
     79 ftpd_logwtmp(const char *line, const char *name, const char *host)
     80 {
     81 	struct utmp ut;
     82 	struct stat buf;
     83 
     84 	if (fd < 0 && (fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 0)
     85 		return;
     86 	if (fstat(fd, &buf) == 0) {
     87 		(void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
     88 		(void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
     89 		(void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
     90 		(void)time(&ut.ut_time);
     91 		if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
     92 		    sizeof(struct utmp))
     93 			(void)ftruncate(fd, buf.st_size);
     94 	}
     95 }
     96 
     97 #ifdef SUPPORT_UTMPX
     98 void
     99 ftpd_logwtmpx(const char *line, const char *name, const char *host, 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 		ut.ut_type = utx_type;
    111 		if (WIFEXITED(status))
    112 			ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status);
    113 		if (WIFSIGNALED(status))
    114 		ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status);
    115 		(void)gettimeofday(&ut.ut_tv, NULL);
    116 		if(write(fdx, (char *)&ut, sizeof(struct utmpx)) !=
    117 		    sizeof(struct utmpx))
    118 			(void)ftruncate(fdx, buf.st_size);
    119 	}
    120 }
    121 #endif
    122