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 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * Portions of this source code were derived from Berkeley 4.3 BSD 31 * under license from the Regents of the University of California. 32 */ 33 34 #pragma ident "%Z%%M% %I% %E% SMI" 35 36 #include <sys/param.h> 37 #include <sys/isa_defs.h> 38 #include <sys/types.h> 39 #include <sys/sysmacros.h> 40 #include <sys/cred.h> 41 #include <sys/systm.h> 42 #include <sys/errno.h> 43 #include <sys/ttold.h> 44 #include <sys/vnode.h> 45 #include <sys/file.h> 46 #include <sys/mode.h> 47 #include <sys/proc.h> 48 #include <sys/uio.h> 49 #include <sys/kmem.h> 50 #include <sys/filio.h> 51 #include <sys/sunddi.h> 52 #include <sys/debug.h> 53 #include <sys/int_limits.h> 54 #include <sys/model.h> 55 56 /* 57 * I/O control. 58 */ 59 60 int 61 ioctl(int fdes, int cmd, intptr_t arg) 62 { 63 file_t *fp; 64 int error = 0; 65 vnode_t *vp; 66 struct vattr vattr; 67 int32_t flag; 68 int rv = 0; 69 70 if ((fp = getf(fdes)) == NULL) 71 return (set_errno(EBADF)); 72 vp = fp->f_vnode; 73 74 if (vp->v_type == VREG || vp->v_type == VDIR) { 75 /* 76 * Handle these two ioctls for regular files and 77 * directories. All others will usually be failed 78 * with ENOTTY by the VFS-dependent code. System V 79 * always failed all ioctls on regular files, but SunOS 80 * supported these. 81 */ 82 switch (cmd) { 83 case FIONREAD: { 84 /* 85 * offset is int32_t because that is what FIONREAD 86 * is defined in terms of. We cap at INT_MAX as in 87 * other cases for this ioctl. 88 */ 89 int32_t offset; 90 91 vattr.va_mask = AT_SIZE; 92 error = VOP_GETATTR(vp, &vattr, 0, fp->f_cred, NULL); 93 if (error) { 94 releasef(fdes); 95 return (set_errno(error)); 96 } 97 offset = MIN(vattr.va_size - fp->f_offset, INT_MAX); 98 if (copyout(&offset, (caddr_t)arg, sizeof (offset))) { 99 releasef(fdes); 100 return (set_errno(EFAULT)); 101 } 102 releasef(fdes); 103 return (0); 104 } 105 106 case FIONBIO: 107 if (copyin((caddr_t)arg, &flag, sizeof (flag))) { 108 releasef(fdes); 109 return (set_errno(EFAULT)); 110 } 111 mutex_enter(&fp->f_tlock); 112 if (flag) 113 fp->f_flag |= FNDELAY; 114 else 115 fp->f_flag &= ~FNDELAY; 116 mutex_exit(&fp->f_tlock); 117 releasef(fdes); 118 return (0); 119 120 default: 121 break; 122 } 123 } 124 125 /* 126 * ioctl() now passes in the model information in some high bits. 127 */ 128 flag = fp->f_flag | get_udatamodel(); 129 error = VOP_IOCTL(fp->f_vnode, cmd, arg, flag, CRED(), &rv, NULL); 130 if (error != 0) { 131 releasef(fdes); 132 return (set_errno(error)); 133 } 134 switch (cmd) { 135 case FIONBIO: 136 if (copyin((caddr_t)arg, &flag, sizeof (flag))) { 137 releasef(fdes); 138 return (set_errno(EFAULT)); 139 } 140 mutex_enter(&fp->f_tlock); 141 if (flag) 142 fp->f_flag |= FNDELAY; 143 else 144 fp->f_flag &= ~FNDELAY; 145 mutex_exit(&fp->f_tlock); 146 break; 147 148 default: 149 break; 150 } 151 releasef(fdes); 152 return (rv); 153 } 154 155 /* 156 * Old stty and gtty. (Still.) 157 */ 158 int 159 stty(int fdes, intptr_t arg) 160 { 161 return (ioctl(fdes, TIOCSETP, arg)); 162 } 163 164 int 165 gtty(int fdes, intptr_t arg) 166 { 167 return (ioctl(fdes, TIOCGETP, arg)); 168 } 169