1 /* $NetBSD: vfs_syscalls_12.c,v 1.10 2001/11/13 02:08:04 lukem Exp $ */ 2 3 /* 4 * Copyright (c) 1989, 1993 5 * The Regents of the University of California. All rights reserved. 6 * (c) UNIX System Laboratories, Inc. 7 * All or some portions of this file are derived from material licensed 8 * to the University of California by American Telephone and Telegraph 9 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 10 * the permission of UNIX System Laboratories, Inc. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * From: @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94 41 */ 42 43 #include <sys/cdefs.h> 44 __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_12.c,v 1.10 2001/11/13 02:08:04 lukem Exp $"); 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/namei.h> 49 #include <sys/filedesc.h> 50 #include <sys/kernel.h> 51 #include <sys/file.h> 52 #include <sys/stat.h> 53 #include <sys/socketvar.h> 54 #include <sys/vnode.h> 55 #include <sys/mount.h> 56 #include <sys/proc.h> 57 #include <sys/uio.h> 58 #include <sys/malloc.h> 59 #include <sys/dirent.h> 60 61 #include <sys/syscallargs.h> 62 63 static void cvtstat __P((struct stat *, struct stat12 *)); 64 65 /* 66 * Convert from a new to an old stat structure. 67 */ 68 static void 69 cvtstat(st, ost) 70 struct stat *st; 71 struct stat12 *ost; 72 { 73 74 ost->st_dev = st->st_dev; 75 ost->st_ino = st->st_ino; 76 ost->st_mode = st->st_mode & 0xffff; 77 if (st->st_nlink >= (1 << 15)) 78 ost->st_nlink = (1 << 15) - 1; 79 else 80 ost->st_nlink = st->st_nlink; 81 ost->st_uid = st->st_uid; 82 ost->st_gid = st->st_gid; 83 ost->st_rdev = st->st_rdev; 84 ost->st_atimespec = st->st_atimespec; 85 ost->st_mtimespec = st->st_mtimespec; 86 ost->st_ctimespec = st->st_ctimespec; 87 ost->st_size = st->st_size; 88 ost->st_blocks = st->st_blocks; 89 ost->st_blksize = st->st_blksize; 90 ost->st_flags = st->st_flags; 91 ost->st_gen = st->st_gen; 92 } 93 94 /* 95 * Read a block of directory entries in a file system independent format. 96 */ 97 int 98 compat_12_sys_getdirentries(p, v, retval) 99 struct proc *p; 100 void *v; 101 register_t *retval; 102 { 103 struct compat_12_sys_getdirentries_args /* { 104 syscallarg(int) fd; 105 syscallarg(char *) buf; 106 syscallarg(u_int) count; 107 syscallarg(long *) basep; 108 } */ *uap = v; 109 struct file *fp; 110 int error, done; 111 long loff; 112 113 /* getvnode() will use the descriptor for us */ 114 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 115 return error; 116 if ((fp->f_flag & FREAD) == 0) { 117 error = EBADF; 118 goto out; 119 } 120 121 loff = fp->f_offset; 122 123 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 124 SCARG(uap, count), &done, p, 0, 0); 125 126 error = copyout(&loff, SCARG(uap, basep), sizeof(long)); 127 *retval = done; 128 out: 129 FILE_UNUSE(fp, p); 130 return error; 131 } 132 133 /* 134 * Get file status; this version follows links. 135 */ 136 /* ARGSUSED */ 137 int 138 compat_12_sys_stat(p, v, retval) 139 struct proc *p; 140 void *v; 141 register_t *retval; 142 { 143 struct compat_12_sys_stat_args /* { 144 syscallarg(const char *) path; 145 syscallarg(struct stat12 *) ub; 146 } */ *uap = v; 147 struct stat sb; 148 struct stat12 osb; 149 int error; 150 struct nameidata nd; 151 152 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 153 SCARG(uap, path), p); 154 if ((error = namei(&nd)) != 0) 155 return (error); 156 error = vn_stat(nd.ni_vp, &sb, p); 157 vput(nd.ni_vp); 158 if (error) 159 return (error); 160 cvtstat(&sb, &osb); 161 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 162 return (error); 163 } 164 165 166 /* 167 * Get file status; this version does not follow links. 168 */ 169 /* ARGSUSED */ 170 int 171 compat_12_sys_lstat(p, v, retval) 172 struct proc *p; 173 void *v; 174 register_t *retval; 175 { 176 struct compat_12_sys_lstat_args /* { 177 syscallarg(const char *) path; 178 syscallarg(struct stat12 *) ub; 179 } */ *uap = v; 180 struct stat sb; 181 struct stat12 osb; 182 int error; 183 struct nameidata nd; 184 185 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 186 SCARG(uap, path), p); 187 if ((error = namei(&nd)) != 0) 188 return (error); 189 error = vn_stat(nd.ni_vp, &sb, p); 190 vput(nd.ni_vp); 191 if (error) 192 return (error); 193 cvtstat(&sb, &osb); 194 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 195 return (error); 196 } 197 198 /* 199 * Return status information about a file descriptor. 200 */ 201 /* ARGSUSED */ 202 int 203 compat_12_sys_fstat(p, v, retval) 204 struct proc *p; 205 void *v; 206 register_t *retval; 207 { 208 struct compat_12_sys_fstat_args /* { 209 syscallarg(int) fd; 210 syscallarg(struct stat12 *) sb; 211 } */ *uap = v; 212 int fd = SCARG(uap, fd); 213 struct filedesc *fdp = p->p_fd; 214 struct file *fp; 215 struct stat ub; 216 struct stat12 oub; 217 int error; 218 219 if ((fp = fd_getfile(fdp, fd)) == NULL) 220 return (EBADF); 221 222 FILE_USE(fp); 223 error = (*fp->f_ops->fo_stat)(fp, &ub, p); 224 FILE_UNUSE(fp, p); 225 226 if (error == 0) { 227 cvtstat(&ub, &oub); 228 error = copyout(&oub, SCARG(uap, sb), sizeof (oub)); 229 } 230 return (error); 231 } 232