vfs_syscalls_12.c revision 1.7
1 /* $NetBSD: vfs_syscalls_12.c,v 1.7 2001/04/07 09:00:57 jdolecek 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/param.h> 44 #include <sys/systm.h> 45 #include <sys/namei.h> 46 #include <sys/filedesc.h> 47 #include <sys/kernel.h> 48 #include <sys/file.h> 49 #include <sys/stat.h> 50 #include <sys/socketvar.h> 51 #include <sys/vnode.h> 52 #include <sys/mount.h> 53 #include <sys/proc.h> 54 #include <sys/uio.h> 55 #include <sys/malloc.h> 56 #include <sys/dirent.h> 57 58 #include <sys/syscallargs.h> 59 60 static void cvtstat __P((struct stat *, struct stat12 *)); 61 62 /* 63 * Convert from a new to an old stat structure. 64 */ 65 static void 66 cvtstat(st, ost) 67 struct stat *st; 68 struct stat12 *ost; 69 { 70 71 ost->st_dev = st->st_dev; 72 ost->st_ino = st->st_ino; 73 ost->st_mode = st->st_mode & 0xffff; 74 if (st->st_nlink >= (1 << 15)) 75 ost->st_nlink = (1 << 15) - 1; 76 else 77 ost->st_nlink = st->st_nlink; 78 ost->st_uid = st->st_uid; 79 ost->st_gid = st->st_gid; 80 ost->st_rdev = st->st_rdev; 81 ost->st_atimespec = st->st_atimespec; 82 ost->st_mtimespec = st->st_mtimespec; 83 ost->st_ctimespec = st->st_ctimespec; 84 ost->st_size = st->st_size; 85 ost->st_blocks = st->st_blocks; 86 ost->st_blksize = st->st_blksize; 87 ost->st_flags = st->st_flags; 88 ost->st_gen = st->st_gen; 89 } 90 91 /* 92 * Read a block of directory entries in a file system independent format. 93 */ 94 int 95 compat_12_sys_getdirentries(p, v, retval) 96 struct proc *p; 97 void *v; 98 register_t *retval; 99 { 100 struct compat_12_sys_getdirentries_args /* { 101 syscallarg(int) fd; 102 syscallarg(char *) buf; 103 syscallarg(u_int) count; 104 syscallarg(long *) basep; 105 } */ *uap = v; 106 struct file *fp; 107 int error, done; 108 long loff; 109 110 /* getvnode() will use the descriptor for us */ 111 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 112 return error; 113 if ((fp->f_flag & FREAD) == 0) { 114 error = EBADF; 115 goto out; 116 } 117 118 loff = fp->f_offset; 119 120 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 121 SCARG(uap, count), &done, p, 0, 0); 122 123 error = copyout(&loff, SCARG(uap, basep), sizeof(long)); 124 *retval = done; 125 out: 126 FILE_UNUSE(fp, p); 127 return error; 128 } 129 130 /* 131 * Get file status; this version follows links. 132 */ 133 /* ARGSUSED */ 134 int 135 compat_12_sys_stat(p, v, retval) 136 struct proc *p; 137 void *v; 138 register_t *retval; 139 { 140 struct compat_12_sys_stat_args /* { 141 syscallarg(const char *) path; 142 syscallarg(struct stat12 *) ub; 143 } */ *uap = v; 144 struct stat sb; 145 struct stat12 osb; 146 int error; 147 struct nameidata nd; 148 149 NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE, 150 SCARG(uap, path), p); 151 if ((error = namei(&nd)) != 0) 152 return (error); 153 error = vn_stat(nd.ni_vp, &sb, p); 154 vput(nd.ni_vp); 155 if (error) 156 return (error); 157 cvtstat(&sb, &osb); 158 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 159 return (error); 160 } 161 162 163 /* 164 * Get file status; this version does not follow links. 165 */ 166 /* ARGSUSED */ 167 int 168 compat_12_sys_lstat(p, v, retval) 169 struct proc *p; 170 void *v; 171 register_t *retval; 172 { 173 struct compat_12_sys_lstat_args /* { 174 syscallarg(const char *) path; 175 syscallarg(struct stat12 *) ub; 176 } */ *uap = v; 177 struct stat sb; 178 struct stat12 osb; 179 int error; 180 struct nameidata nd; 181 182 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 183 SCARG(uap, path), p); 184 if ((error = namei(&nd)) != 0) 185 return (error); 186 error = vn_stat(nd.ni_vp, &sb, p); 187 vput(nd.ni_vp); 188 if (error) 189 return (error); 190 cvtstat(&sb, &osb); 191 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 192 return (error); 193 } 194 195 /* 196 * Return status information about a file descriptor. 197 */ 198 /* ARGSUSED */ 199 int 200 compat_12_sys_fstat(p, v, retval) 201 struct proc *p; 202 void *v; 203 register_t *retval; 204 { 205 struct compat_12_sys_fstat_args /* { 206 syscallarg(int) fd; 207 syscallarg(struct stat12 *) sb; 208 } */ *uap = v; 209 int fd = SCARG(uap, fd); 210 struct filedesc *fdp = p->p_fd; 211 struct file *fp; 212 struct stat ub; 213 struct stat12 oub; 214 int error; 215 216 if ((u_int)fd >= fdp->fd_nfiles || 217 (fp = fdp->fd_ofiles[fd]) == NULL) 218 return (EBADF); 219 220 FILE_USE(fp); 221 error = (*fp->f_ops->fo_stat)(fp->f_data, &ub, p); 222 FILE_UNUSE(fp, p); 223 224 if (error == 0) { 225 cvtstat(&ub, &oub); 226 error = copyout(&oub, SCARG(uap, sb), sizeof (oub)); 227 } 228 return (error); 229 } 230
Indexes created Sat Sep 27 14:09:57 GMT 2025