1 /* $NetBSD: logwtmp.c,v 1.27 2015/08/09 20:34:24 shm 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 1.27 2015/08/09 20:34:24 shm 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
ftpd_initwtmp(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
ftpd_logwtmp(const char * line,const char * name,const char * host)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
ftpd_initwtmpx(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
ftpd_logwtmpx(const char * line,const char * name,const char * host,struct sockinet * haddr,int status,int utx_type)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)memset(&ut, 0, sizeof(ut));
128 (void)strncpy(ut.ut_line, line, sizeof(ut.ut_line));
129 (void)strncpy(ut.ut_name, name, sizeof(ut.ut_name));
130 (void)strncpy(ut.ut_host, host, sizeof(ut.ut_host));
131 if (haddr)
132 (void)memcpy(&ut.ut_ss, &haddr->si_su, haddr->su_len);
133 ut.ut_type = utx_type;
134 if (WIFEXITED(status))
135 ut.ut_exit.e_exit = (uint16_t)WEXITSTATUS(status);
136 if (WIFSIGNALED(status))
137 ut.ut_exit.e_termination = (uint16_t)WTERMSIG(status);
138 (void)gettimeofday(&ut.ut_tv, NULL);
139 if(write(fdx, (char *)&ut, sizeof(struct utmpx)) !=
140 sizeof(struct utmpx))
141 (void)ftruncate(fdx, buf.st_size);
142 }
143 }
144 #endif
145