Add humanize_number(3) and split the trimdomain(3) function out from
[dragonfly.git] / lib / libutil / logwtmp.c
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1/*-
2 * Copyright (c) 1988, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)logwtmp.c 8.1 (Berkeley) 6/4/93
34 * $FreeBSD: src/lib/libutil/logwtmp.c,v 1.14 2000/01/15 03:26:54 shin Exp $
f41183ad 35 * $DragonFly: src/lib/libutil/logwtmp.c,v 1.3 2004/11/05 17:05:26 dillon Exp $
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36 */
37
f41183ad 38#include <sys/cdefs.h>
984263bc 39#include <sys/param.h>
984263bc 40#include <sys/file.h>
f41183ad 41#include <sys/socket.h>
984263bc 42#include <sys/stat.h>
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43
44#include <libutil.h>
45#include <netdb.h>
f41183ad 46#include <stdio.h>
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47#include <string.h>
48#include <time.h>
49#include <unistd.h>
50#include <utmp.h>
51
52/* wrapper for KAME-special getnameinfo() */
53#ifndef NI_WITHSCOPEID
54#define NI_WITHSCOPEID 0
55#endif
56
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57
58void
f41183ad 59logwtmp(const char *line, const char *name, const char *host)
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60{
61 struct utmp ut;
62 struct stat buf;
63 char fullhost[MAXHOSTNAMELEN];
64 int fd;
65
66 strncpy(fullhost, host, sizeof(fullhost) - 1);
67 fullhost[sizeof(fullhost) - 1] = '\0';
68 trimdomain(fullhost, UT_HOSTSIZE);
69 host = fullhost;
70
71 if (strlen(host) > UT_HOSTSIZE) {
72 int error;
73 struct addrinfo hints, *res;
74
75 bzero(&hints, sizeof(struct addrinfo));
76 hints.ai_family = AF_UNSPEC;
77 hints.ai_flags = AI_CANONNAME;
78 error = getaddrinfo(host, NULL, &hints, &res);
79 if (error != 0 || res->ai_addr == NULL)
80 host = "invalid hostname";
81 else {
82 error = getnameinfo(res->ai_addr, res->ai_addrlen,
83 fullhost, strlen(fullhost), NULL, 0,
84 NI_NUMERICHOST|NI_WITHSCOPEID);
85 if (error != 0) {
86 fprintf(stderr, "%d", error);
87 host = "invalid hostname";
88 }
89 }
90 }
91
92 if ((fd = open(_PATH_WTMP, O_WRONLY|O_APPEND, 0)) < 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 (void) close(fd);
104}