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 <errno.h> 32 #include <sys/types.h> 33 #include <unistd.h> 34 #include <sys/syscall.h> 35 #include <sys/uio.h> 36 37 /* 38 * If reading from the utmp file, map the data to the SunOS 4.1 39 * format on the fly. 40 */ 41 extern void to_utmp(char *, char *, int); 42 43 int 44 readv(int fd, struct iovec *iov, int iovcnt) 45 { 46 return (bc_readv(fd, iov, iovcnt)); 47 } 48 49 int 50 bc_readv(int fd, struct iovec *iov, int iovcnt) 51 { 52 int fds, ret, off; 53 int i, size, total = 0; 54 char *nbuf; 55 56 if (fd_get(fd) != -1) { /* we're reading utmp (utmpx really) */ 57 for (i = 0; i < iovcnt; i++) { 58 size = getmodsize(iov[i].iov_len, 59 sizeof (struct compat_utmp), 60 sizeof (struct utmpx)); 61 62 if ((nbuf = (void *)malloc(size)) == NULL) { 63 fprintf(stderr, "readv: malloc failed\n"); 64 exit(-1); 65 } 66 67 if ((ret = _read(fd, nbuf, size)) == -1) { 68 if (errno == EAGAIN) 69 errno = EWOULDBLOCK; 70 free(nbuf); 71 return (-1); 72 } 73 74 to_utmp(iov[i].iov_base, nbuf, ret); 75 76 ret = getmodsize(ret, sizeof (struct utmpx), 77 sizeof (struct compat_utmp)); 78 total += ret; 79 80 free(nbuf); 81 } 82 83 return (total); 84 } 85 86 if ((ret = _readv(fd, iov, iovcnt)) == -1) { 87 if (errno == EAGAIN) 88 errno = EWOULDBLOCK; 89 } 90 return (ret); 91 } 92