1*0Sstevel@tonic-gate /* 2*0Sstevel@tonic-gate * CDDL HEADER START 3*0Sstevel@tonic-gate * 4*0Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*0Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*0Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*0Sstevel@tonic-gate * with the License. 8*0Sstevel@tonic-gate * 9*0Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*0Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*0Sstevel@tonic-gate * See the License for the specific language governing permissions 12*0Sstevel@tonic-gate * and limitations under the License. 13*0Sstevel@tonic-gate * 14*0Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*0Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*0Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*0Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*0Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*0Sstevel@tonic-gate * 20*0Sstevel@tonic-gate * CDDL HEADER END 21*0Sstevel@tonic-gate */ 22*0Sstevel@tonic-gate /* 23*0Sstevel@tonic-gate * Copyright (c) 1999 by Sun Microsystems, Inc. 24*0Sstevel@tonic-gate * All rights reserved. 25*0Sstevel@tonic-gate */ 26*0Sstevel@tonic-gate 27*0Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 28*0Sstevel@tonic-gate 29*0Sstevel@tonic-gate #include <syscall.h> 30*0Sstevel@tonic-gate #include <sys/types.h> 31*0Sstevel@tonic-gate 32*0Sstevel@tonic-gate /* The following are from SVR4 sys/fcntl.h */ 33*0Sstevel@tonic-gate 34*0Sstevel@tonic-gate #define F_FREESP 11 /* Free file space */ 35*0Sstevel@tonic-gate #define F_WRLCK 02 /* Write Lock */ 36*0Sstevel@tonic-gate 37*0Sstevel@tonic-gate /* lock structure from SVR4. */ 38*0Sstevel@tonic-gate struct fl { 39*0Sstevel@tonic-gate short l_type; 40*0Sstevel@tonic-gate short l_whence; 41*0Sstevel@tonic-gate off_t l_start; 42*0Sstevel@tonic-gate off_t l_len; 43*0Sstevel@tonic-gate long l_sysid; 44*0Sstevel@tonic-gate pid_t l_pid; 45*0Sstevel@tonic-gate long pad[4]; 46*0Sstevel@tonic-gate }; 47*0Sstevel@tonic-gate 48*0Sstevel@tonic-gate int ftruncate(int fd, off_t length) 49*0Sstevel@tonic-gate { 50*0Sstevel@tonic-gate 51*0Sstevel@tonic-gate struct fl lck; 52*0Sstevel@tonic-gate 53*0Sstevel@tonic-gate lck.l_whence = 0; /* offset l_start from beginning of file */ 54*0Sstevel@tonic-gate lck.l_start = length; 55*0Sstevel@tonic-gate lck.l_type = F_WRLCK; /* setting a write lock */ 56*0Sstevel@tonic-gate lck.l_len = 0L; 57*0Sstevel@tonic-gate 58*0Sstevel@tonic-gate if (_syscall(SYS_fcntl, fd, F_FREESP, (int)&lck) == -1) 59*0Sstevel@tonic-gate return (-1); 60*0Sstevel@tonic-gate else 61*0Sstevel@tonic-gate return (0); 62*0Sstevel@tonic-gate } 63