xref: /onnv-gate/usr/src/lib/libbc/libc/sys/sys5/writev.c (revision 3224:c0c9287a0eec)
10Sstevel@tonic-gate /*
20Sstevel@tonic-gate  * CDDL HEADER START
30Sstevel@tonic-gate  *
40Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*3224Sraf  * Common Development and Distribution License (the "License").
6*3224Sraf  * You may not use this file except in compliance with the License.
70Sstevel@tonic-gate  *
80Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
90Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
100Sstevel@tonic-gate  * See the License for the specific language governing permissions
110Sstevel@tonic-gate  * and limitations under the License.
120Sstevel@tonic-gate  *
130Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
140Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
150Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
160Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
170Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
180Sstevel@tonic-gate  *
190Sstevel@tonic-gate  * CDDL HEADER END
200Sstevel@tonic-gate  */
21*3224Sraf 
220Sstevel@tonic-gate /*
23*3224Sraf  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24*3224Sraf  * Use is subject to license terms.
250Sstevel@tonic-gate  */
260Sstevel@tonic-gate 
270Sstevel@tonic-gate #pragma ident	"%Z%%M%	%I%	%E% SMI"
280Sstevel@tonic-gate 
290Sstevel@tonic-gate #include "../common/compat.h"
300Sstevel@tonic-gate #include <stdio.h>
310Sstevel@tonic-gate #include <sys/types.h>
320Sstevel@tonic-gate #include <unistd.h>
330Sstevel@tonic-gate #include <sys/uio.h>
340Sstevel@tonic-gate 
350Sstevel@tonic-gate /*
360Sstevel@tonic-gate  * If writing to a utmp-like file, map the utmp structure to
370Sstevel@tonic-gate  * new format on the fly.
380Sstevel@tonic-gate  */
390Sstevel@tonic-gate extern int conv2utmpx(char *, char *, int);
400Sstevel@tonic-gate 
410Sstevel@tonic-gate int
writev(int fd,struct iovec * iov,int iovcnt)420Sstevel@tonic-gate writev(int fd, struct iovec *iov, int iovcnt)
430Sstevel@tonic-gate {
440Sstevel@tonic-gate 	return (bc_writev(fd, iov, iovcnt));
450Sstevel@tonic-gate }
460Sstevel@tonic-gate 
470Sstevel@tonic-gate int
bc_writev(int fd,struct iovec * iov,int iovcnt)480Sstevel@tonic-gate bc_writev(int fd, struct iovec *iov, int iovcnt)
490Sstevel@tonic-gate {
500Sstevel@tonic-gate 	int ret, off;
510Sstevel@tonic-gate 	int nsize, total = 0;
520Sstevel@tonic-gate 	char *nbuf;
530Sstevel@tonic-gate 	int i;
54*3224Sraf 
550Sstevel@tonic-gate 	if (fd_get(fd) != -1) {
560Sstevel@tonic-gate 		for (i = 0; i < iovcnt; i++) {
570Sstevel@tonic-gate 			nsize = getmodsize(iov[i].iov_len,
580Sstevel@tonic-gate 			    sizeof (struct compat_utmp),
590Sstevel@tonic-gate 			    sizeof (struct utmpx));
600Sstevel@tonic-gate 
610Sstevel@tonic-gate 			if ((nbuf = (void *)malloc(nsize)) == NULL) {
620Sstevel@tonic-gate 				fprintf(stderr, "writev: malloc failed\n");
630Sstevel@tonic-gate 				exit(-1);
640Sstevel@tonic-gate 			}
65*3224Sraf 
660Sstevel@tonic-gate 			(void) memset(nbuf, 0, nsize);
670Sstevel@tonic-gate 
680Sstevel@tonic-gate 			ret = conv2utmpx(nbuf, iov[i].iov_base, iov[i].iov_len);
690Sstevel@tonic-gate 
700Sstevel@tonic-gate 			if ((ret = _write(fd, nbuf, ret)) == -1) {
710Sstevel@tonic-gate 				free(nbuf);
720Sstevel@tonic-gate 				return (-1);
730Sstevel@tonic-gate 			}
740Sstevel@tonic-gate 
75*3224Sraf 			free(nbuf);
760Sstevel@tonic-gate 
77*3224Sraf 			ret = getmodsize(ret, sizeof (struct utmpx),
780Sstevel@tonic-gate 			    sizeof (struct compat_utmp));
79*3224Sraf 			total += ret;
800Sstevel@tonic-gate 		}
810Sstevel@tonic-gate 		return (total);
820Sstevel@tonic-gate 	}
830Sstevel@tonic-gate 
840Sstevel@tonic-gate 	return (_writev(fd, iov, iovcnt));
850Sstevel@tonic-gate }
86