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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1999 by Sun Microsystems, Inc. 24 * All rights reserved. 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 total += ret; 81 82 free(nbuf); 83 84 ret = getmodsize(ret, sizeof (struct utmpx), 85 sizeof (struct compat_utmp)); 86 87 } 88 total = getmodsize(total, sizeof (struct utmpx), 89 sizeof (struct compat_utmp)); 90 return (total); 91 } 92 93 if ((ret = _writev(fd, iov, iovcnt)) == -1) { 94 if (errno == EAGAIN) 95 errno = EWOULDBLOCK; 96 } 97 98 return (ret); 99 } 100