1/* 2 * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. 3 * 4 * @APPLE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. Please obtain a copy of the License at 10 * http://www.opensource.apple.com/apsl/ and read it before using this 11 * file. 12 * 13 * The Original Code and all software distributed under the License are 14 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 15 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 16 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 17 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 18 * Please see the License for the specific language governing rights and 19 * limitations under the License. 20 * 21 * @APPLE_LICENSE_HEADER_END@ 22 */ 23/* Copyright 1998 Apple Computer, Inc. 24 * 25 * Get disk label's sector size routine. 26 * Input: pointer to a block device string ie: "/dev/disk1s1" 27 * Return: sector size from the disk label 28 * 29 * HISTORY 30 * 31 * 27 May 1998 K. Crippes at Apple 32 * Rhapsody version created. 33 * 18 Feb 1999 D. Markarian at Apple 34 * DKIOCGLABEL deprecated; using DKIOCBLKSIZE instead, which now returns 35 * the appropriate size for ufs partitions created with wierd block sizes. 36 */ 37 38#include <sys/types.h> 39#include <sys/file.h> 40#include <sys/disk.h> 41#include <errno.h> 42#include <stdio.h> 43#include <string.h> 44#include <unistd.h> 45 46char *blockcheck __P((char *)); 47 48long dksecsize (dev) 49 char *dev; 50{ 51 int fd; /* file descriptor for reading device label */ 52 char *cdev; 53 int devblklen; 54 extern int errno; 55 56 /* Convert block device into a character device string */ 57 if ((cdev = blockcheck(dev))) { 58 if ((fd = open(cdev, O_RDONLY)) < 0) { 59 fprintf(stderr, "Can't open %s, %s\n", cdev, strerror(errno)); 60 return (0); 61 } 62 } 63 else 64 return (0); 65 66 if (ioctl(fd, DKIOCGETBLOCKSIZE, &devblklen) < 0) { 67 (void)close(fd); 68 return (0); 69 } 70 else { 71 (void)close(fd); 72 return (devblklen); 73 } 74} 75 76