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 2001 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * Portions of this source code were derived from Berkeley 4.3 BSD 32 * under license from the Regents of the University of California. 33 */ 34 35 #pragma ident "%Z%%M% %I% %E% SMI" 36 37 #include <sys/param.h> 38 #include <sys/isa_defs.h> 39 #include <sys/types.h> 40 #include <sys/sysmacros.h> 41 #include <sys/cred.h> 42 #include <sys/systm.h> 43 #include <sys/errno.h> 44 #include <sys/ttold.h> 45 #include <sys/vnode.h> 46 #include <sys/file.h> 47 #include <sys/mode.h> 48 #include <sys/proc.h> 49 #include <sys/uio.h> 50 #include <sys/kmem.h> 51 #include <sys/filio.h> 52 #include <sys/sunddi.h> 53 #include <sys/debug.h> 54 #include <sys/int_limits.h> 55 #include <sys/model.h> 56 57 /* 58 * I/O control. 59 */ 60 61 int 62 ioctl(int fdes, int cmd, intptr_t arg) 63 { 64 file_t *fp; 65 int error = 0; 66 vnode_t *vp; 67 struct vattr vattr; 68 int32_t flag; 69 int rv = 0; 70 71 if ((fp = getf(fdes)) == NULL) 72 return (set_errno(EBADF)); 73 vp = fp->f_vnode; 74 75 if (vp->v_type == VREG || vp->v_type == VDIR) { 76 /* 77 * Handle these two ioctls for regular files and 78 * directories. All others will usually be failed 79 * with ENOTTY by the VFS-dependent code. System V 80 * always failed all ioctls on regular files, but SunOS 81 * supported these. 82 */ 83 switch (cmd) { 84 case FIONREAD: { 85 /* 86 * offset is int32_t because that is what FIONREAD 87 * is defined in terms of. We cap at INT_MAX as in 88 * other cases for this ioctl. 89 */ 90 int32_t offset; 91 92 vattr.va_mask = AT_SIZE; 93 error = VOP_GETATTR(vp, &vattr, 0, fp->f_cred); 94 if (error) { 95 releasef(fdes); 96 return (set_errno(error)); 97 } 98 offset = MIN(vattr.va_size - fp->f_offset, INT_MAX); 99 if (copyout(&offset, (caddr_t)arg, sizeof (offset))) { 100 releasef(fdes); 101 return (set_errno(EFAULT)); 102 } 103 releasef(fdes); 104 return (0); 105 } 106 107 case FIONBIO: 108 if (copyin((caddr_t)arg, &flag, sizeof (flag))) { 109 releasef(fdes); 110 return (set_errno(EFAULT)); 111 } 112 mutex_enter(&fp->f_tlock); 113 if (flag) 114 fp->f_flag |= FNDELAY; 115 else 116 fp->f_flag &= ~FNDELAY; 117 mutex_exit(&fp->f_tlock); 118 releasef(fdes); 119 return (0); 120 121 default: 122 break; 123 } 124 } 125 126 /* 127 * ioctl() now passes in the model information in some high bits. 128 */ 129 flag = fp->f_flag | get_udatamodel(); 130 error = VOP_IOCTL(fp->f_vnode, cmd, arg, flag, CRED(), &rv); 131 if (error != 0) { 132 releasef(fdes); 133 return (set_errno(error)); 134 } 135 switch (cmd) { 136 case FIONBIO: 137 if (copyin((caddr_t)arg, &flag, sizeof (flag))) { 138 releasef(fdes); 139 return (set_errno(EFAULT)); 140 } 141 mutex_enter(&fp->f_tlock); 142 if (flag) 143 fp->f_flag |= FNDELAY; 144 else 145 fp->f_flag &= ~FNDELAY; 146 mutex_exit(&fp->f_tlock); 147 break; 148 149 default: 150 break; 151 } 152 releasef(fdes); 153 return (rv); 154 } 155 156 /* 157 * Old stty and gtty. (Still.) 158 */ 159 int 160 stty(int fdes, intptr_t arg) 161 { 162 return (ioctl(fdes, TIOCSETP, arg)); 163 } 164 165 int 166 gtty(int fdes, intptr_t arg) 167 { 168 return (ioctl(fdes, TIOCGETP, arg)); 169 } 170