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/errno.h> 32 #include <sys/types.h> 33 #include <unistd.h> 34 #include <sys/uio.h> 35 36 /* 37 * If writing to a utmp-like file, map the utmp structure to 38 * new format on the fly. 39 */ 40 extern int errno; 41 42 extern int conv2utmpx(char *, char *, int); 43 44 int 45 writev(int fd, struct iovec *iov, int iovcnt) 46 { 47 return (bc_writev(fd, iov, iovcnt)); 48 } 49 50 int 51 bc_writev(int fd, struct iovec *iov, int iovcnt) 52 { 53 int ret, off; 54 int nsize, total = 0; 55 char *nbuf; 56 int i; 57 58 if (fd_get(fd) != -1) { /* writing utmp (utmpx, actually) */ 59 for (i = 0; i < iovcnt; i++) { 60 nsize = getmodsize(iov[i].iov_len, 61 sizeof (struct compat_utmp), 62 sizeof (struct utmpx)); 63 64 if ((nbuf = (void *)malloc(nsize)) == NULL) { 65 fprintf(stderr, "writev: malloc failed\n"); 66 exit(-1); 67 } 68 69 (void) memset(nbuf, 0, nsize); 70 71 ret = conv2utmpx(nbuf, iov[i].iov_base, iov[i].iov_len); 72 73 if ((ret = _write(fd, nbuf, ret)) == -1) { 74 if (errno == EAGAIN) 75 errno = EWOULDBLOCK; 76 free(nbuf); 77 return (-1); 78 } 79 80 free(nbuf); 81 82 ret = getmodsize(ret, sizeof (struct utmpx), 83 sizeof (struct compat_utmp)); 84 total += ret; 85 } 86 return (total); 87 } 88 89 if ((ret = _writev(fd, iov, iovcnt)) == -1) { 90 if (errno == EAGAIN) 91 errno = EWOULDBLOCK; 92 } 93 94 return (ret); 95 } 96