libexec/ftpd/logwtmp.c

   1 /*      $NetBSD: logwtmp.c,v 1.25 2006/09/23 16:03:50 xtraeme 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 1.25 2006/09/23 16:03:50 xtraeme 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 <syslog.h>
  55 #include <unistd.h>
  56 #ifdef SUPPORT_UTMP
  57 #include <utmp.h>
  58 #endif
  59 #ifdef SUPPORT_UTMPX
  60 #include <utmpx.h>
  61 #endif
  62 #include <util.h>
  63
  64 #ifdef KERBEROS5
  65 #include <krb5/krb5.h>
  66 #endif
  67
  68 #include "extern.h"
  69
  70 #ifdef SUPPORT_UTMP
  71 static int fd = -1;
  72
  73 void
  74 ftpd_initwtmp(void)
  75 {
  76         const char *wf = _PATH_WTMP;
  77         if ((fd = open(wf, O_WRONLY|O_APPEND, 0)) == -1)
  78                 syslog(LOG_ERR, "Cannot open `%s' (%m)", wf);
  79 }
  80
  81 /*
  82  * Modified version of logwtmp that holds wtmp file open
  83  * after first call, for use with ftp (which may chroot
  84  * after login, but before logout).
  85  */
  86 void
  87 ftpd_logwtmp(const char *line, const char *name, const char *host)
  88 {
  89         struct utmp ut;
  90         struct stat buf;
  91
  92         if (fd < 0)
  93                 return;
  94         if (fstat(fd, &buf) == 0) {
  95                 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
  96                 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
  97                 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
  98                 (void)time(&ut.ut_time);
  99                 if (write(fd, (char *)&ut, sizeof(struct utmp)) !=
 100                     sizeof(struct utmp))
 101                         (void)ftruncate(fd, buf.st_size);
 102         }
 103 }
 104 #endif
 105
 106 #ifdef SUPPORT_UTMPX
 107 static int fdx = -1;
 108
 109 void
 110 ftpd_initwtmpx(void)
 111 {
 112         const char *wf = _PATH_WTMPX;
 113         if ((fdx = open(wf, O_WRONLY|O_APPEND, 0)) == -1)
 114                 syslog(LOG_ERR, "Cannot open `%s' (%m)", wf);
 115 }
 116
 117 void
 118 ftpd_logwtmpx(const char *line, const char *name, const char *host,
 119     struct sockinet *haddr, int status, int utx_type)
 120 {
 121         struct utmpx ut;
 122         struct stat buf;
 123
 124         if (fdx < 0)
 125                 return;
 126         if (fstat(fdx, &buf) == 0) {
 127                 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
 128                 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
 129                 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
 130                 if (haddr)
 131                         (void)memcpy(&ut.ut_ss, &haddr->si_su, haddr->su_len);
 132                 else
 133                         (void)memset(&ut.ut_ss, 0, sizeof(ut.ut_ss));
 134                 ut.ut_type = utx_type;
 135                 if (WIFEXITED(status))
 136                         ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status);
 137                 if (WIFSIGNALED(status))
 138                 ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status);
 139                 (void)gettimeofday(&ut.ut_tv, NULL);
 140                 if(write(fdx, (char *)&ut, sizeof(struct utmpx)) !=
 141                     sizeof(struct utmpx))
 142                         (void)ftruncate(fdx, buf.st_size);
 143         }
 144 }
 145 #endif