10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*3224Sraf * Common Development and Distribution License (the "License"). 6*3224Sraf * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 21*3224Sraf 220Sstevel@tonic-gate /* 23*3224Sraf * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 24*3224Sraf * Use is subject to license terms. 250Sstevel@tonic-gate */ 260Sstevel@tonic-gate 270Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 280Sstevel@tonic-gate 29*3224Sraf #include <sys/syscall.h> 300Sstevel@tonic-gate #include <sys/types.h> 310Sstevel@tonic-gate 320Sstevel@tonic-gate /* The following are from SVR4 sys/fcntl.h */ 330Sstevel@tonic-gate 34*3224Sraf #define F_FREESP 11 /* Free file space */ 35*3224Sraf #define F_WRLCK 02 /* Write Lock */ 360Sstevel@tonic-gate 370Sstevel@tonic-gate /* lock structure from SVR4. */ 380Sstevel@tonic-gate struct fl { 390Sstevel@tonic-gate short l_type; 400Sstevel@tonic-gate short l_whence; 410Sstevel@tonic-gate off_t l_start; 420Sstevel@tonic-gate off_t l_len; 430Sstevel@tonic-gate long l_sysid; 440Sstevel@tonic-gate pid_t l_pid; 450Sstevel@tonic-gate long pad[4]; 460Sstevel@tonic-gate }; 470Sstevel@tonic-gate 48*3224Sraf int ftruncate(int fd,off_t length)49*3224Srafftruncate(int fd, off_t length) 500Sstevel@tonic-gate { 510Sstevel@tonic-gate 520Sstevel@tonic-gate struct fl lck; 530Sstevel@tonic-gate 540Sstevel@tonic-gate lck.l_whence = 0; /* offset l_start from beginning of file */ 55*3224Sraf lck.l_start = length; 560Sstevel@tonic-gate lck.l_type = F_WRLCK; /* setting a write lock */ 570Sstevel@tonic-gate lck.l_len = 0L; 580Sstevel@tonic-gate 590Sstevel@tonic-gate if (_syscall(SYS_fcntl, fd, F_FREESP, (int)&lck) == -1) 600Sstevel@tonic-gate return (-1); 61*3224Sraf else 620Sstevel@tonic-gate return (0); 63*3224Sraf } 64