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 <syscall.h> 35 #include <sys/uio.h> 36 37 extern int errno; 38 39 /* 40 * If reading from the utmp file, map the data to the SunOS 4.1 41 * format on the fly. 42 */ 43 extern void to_utmp(char *, char *, int); 44 45 int 46 readv(int fd, struct iovec *iov, int iovcnt) 47 { 48 return (bc_readv(fd, iov, iovcnt)); 49 } 50 51 int 52 bc_readv(int fd, struct iovec *iov, int iovcnt) 53 { 54 int fds, ret, off; 55 int i, size, total = 0; 56 char *nbuf; 57 58 if (fd_get(fd) != -1) { /* we're reading utmp (utmpx really) */ 59 for (i = 0; i < iovcnt; i++) { 60 size = getmodsize(iov[i].iov_len, 61 sizeof (struct compat_utmp), 62 sizeof (struct utmpx)); 63 64 if ((nbuf = (void *)malloc(size)) == NULL) { 65 fprintf(stderr, "readv: malloc failed\n"); 66 exit(-1); 67 } 68 69 if ((ret = _read(fd, nbuf, size)) == -1) { 70 if (errno == EAGAIN) 71 errno = EWOULDBLOCK; 72 free(nbuf); 73 return (-1); 74 } 75 76 total += ret; 77 78 to_utmp(iov[i].iov_base, nbuf, ret); 79 80 ret = getmodsize(ret, sizeof (struct utmpx), 81 sizeof (struct compat_utmp)); 82 free(nbuf); 83 } 84 85 return (total); 86 } 87 88 if ((ret = _readv(fd, iov, iovcnt)) == -1) { 89 if (errno == EAGAIN) 90 errno = EWOULDBLOCK; 91 } 92 return (ret); 93 94 } 95