1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
24 * Use is subject to license terms.
25 */
26
27 #pragma ident "%Z%%M% %I% %E% SMI"
28
29 #include "../common/compat.h"
30 #include <stdio.h>
31 #include <sys/types.h>
32 #include <unistd.h>
33 #include <sys/syscall.h>
34
35 /*
36 * If reading from the utmp file, map the data to the SunOS 4.1
37 * format on the fly.
38 */
39
40 extern void to_utmp(char *, char *, int);
41
42 int
read(int fd,char * buf,int size)43 read(int fd, char *buf, int size)
44 {
45 return (bc_read(fd, buf, size));
46 }
47
48 int
bc_read(int fd,char * buf,int size)49 bc_read(int fd, char *buf, int size)
50 {
51 int ret, off;
52 char *nbuf;
53
54 if (fd_get(fd) != -1) { /* we're reading utmp (utmpx, really) */
55 size = getmodsize(size, sizeof (struct compat_utmp),
56 sizeof (struct utmpx));
57
58 if ((nbuf = (void *)malloc(size)) == NULL) {
59 (void) fprintf(stderr, "read: malloc failed\n");
60 exit(-1);
61 }
62
63 if ((ret = _read(fd, nbuf, size)) == -1) {
64 free(nbuf);
65 return (-1);
66 }
67
68 to_utmp(buf, nbuf, ret);
69
70 ret = getmodsize(ret, sizeof (struct utmpx),
71 sizeof (struct compat_utmp));
72 free(nbuf);
73 return (ret);
74 }
75
76 return (_read(fd, buf, size));
77 }
78
79 void
to_utmp(char * buf,char * nbuf,int len)80 to_utmp(char *buf, char *nbuf, int len)
81 {
82 struct compat_utmp *ut;
83 struct utmpx *utx;
84
85 utx = (struct utmpx *)nbuf;
86 ut = (struct compat_utmp *)buf;
87
88 while ((char *)utx < (nbuf + len)) {
89 (void) strncpy(ut->ut_line, utx->ut_line, sizeof (ut->ut_line));
90 (void) strncpy(ut->ut_name, utx->ut_user, sizeof (ut->ut_name));
91 (void) strncpy(ut->ut_host, utx->ut_host, sizeof (ut->ut_host));
92 ut->ut_time = utx->ut_tv.tv_sec;
93 utx++;
94 ut++;
95 }
96 }
97