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/uio.h>
34
35 /*
36 * If writing to a utmp-like file, map the utmp structure to
37 * new format on the fly.
38 */
39 extern int conv2utmpx(char *, char *, int);
40
41 int
writev(int fd,struct iovec * iov,int iovcnt)42 writev(int fd, struct iovec *iov, int iovcnt)
43 {
44 return (bc_writev(fd, iov, iovcnt));
45 }
46
47 int
bc_writev(int fd,struct iovec * iov,int iovcnt)48 bc_writev(int fd, struct iovec *iov, int iovcnt)
49 {
50 int ret, off;
51 int nsize, total = 0;
52 char *nbuf;
53 int i;
54
55 if (fd_get(fd) != -1) {
56 for (i = 0; i < iovcnt; i++) {
57 nsize = getmodsize(iov[i].iov_len,
58 sizeof (struct compat_utmp),
59 sizeof (struct utmpx));
60
61 if ((nbuf = (void *)malloc(nsize)) == NULL) {
62 fprintf(stderr, "writev: malloc failed\n");
63 exit(-1);
64 }
65
66 (void) memset(nbuf, 0, nsize);
67
68 ret = conv2utmpx(nbuf, iov[i].iov_base, iov[i].iov_len);
69
70 if ((ret = _write(fd, nbuf, ret)) == -1) {
71 free(nbuf);
72 return (-1);
73 }
74
75 free(nbuf);
76
77 ret = getmodsize(ret, sizeof (struct utmpx),
78 sizeof (struct compat_utmp));
79 total += ret;
80 }
81 return (total);
82 }
83
84 return (_writev(fd, iov, iovcnt));
85 }
86