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