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/types.h> 32 #include <unistd.h> 33 #include <sys/syscall.h> 34 35 /* 36 * If reading from the utmp file, map the data to the SunOS 4.1 37 * format on the fly. 38 */ 39 40 extern void to_utmp(char *, char *, int); 41 42 int 43 read(int fd, char *buf, int size) 44 { 45 return (bc_read(fd, buf, size)); 46 } 47 48 int 49 bc_read(int fd, char *buf, int size) 50 { 51 int ret, off; 52 char *nbuf; 53 54 if (fd_get(fd) != -1) { /* we're reading utmp (utmpx, really) */ 55 size = getmodsize(size, sizeof (struct compat_utmp), 56 sizeof (struct utmpx)); 57 58 if ((nbuf = (void *)malloc(size)) == NULL) { 59 (void) fprintf(stderr, "read: malloc failed\n"); 60 exit(-1); 61 } 62 63 if ((ret = _read(fd, nbuf, size)) == -1) { 64 free(nbuf); 65 return (-1); 66 } 67 68 to_utmp(buf, nbuf, ret); 69 70 ret = getmodsize(ret, sizeof (struct utmpx), 71 sizeof (struct compat_utmp)); 72 free(nbuf); 73 return (ret); 74 } 75 76 return (_read(fd, buf, size)); 77 } 78 79 void 80 to_utmp(char *buf, char *nbuf, int len) 81 { 82 struct compat_utmp *ut; 83 struct utmpx *utx; 84 85 utx = (struct utmpx *)nbuf; 86 ut = (struct compat_utmp *)buf; 87 88 while ((char *)utx < (nbuf + len)) { 89 (void) strncpy(ut->ut_line, utx->ut_line, sizeof (ut->ut_line)); 90 (void) strncpy(ut->ut_name, utx->ut_user, sizeof (ut->ut_name)); 91 (void) strncpy(ut->ut_host, utx->ut_host, sizeof (ut->ut_host)); 92 ut->ut_time = utx->ut_tv.tv_sec; 93 utx++; 94 ut++; 95 } 96 } 97