vfs_syscalls_12.c revision 1.13
1 /* $NetBSD: vfs_syscalls_12.c,v 1.13 2003/06/29 22:29:14 fvdl 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 1.13 2003/06/29 22:29:14 fvdl 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/sa.h> 62 #include <sys/syscallargs.h> 63 64 static void cvtstat __P((struct stat *, struct stat12 *)); 65 66 /* 67 * Convert from a new to an old stat structure. 68 */ 69 static void 70 cvtstat(st, ost) 71 struct stat *st; 72 struct stat12 *ost; 73 { 74 75 ost->st_dev = st->st_dev; 76 ost->st_ino = st->st_ino; 77 ost->st_mode = st->st_mode & 0xffff; 78 if (st->st_nlink >= (1 << 15)) 79 ost->st_nlink = (1 << 15) - 1; 80 else 81 ost->st_nlink = st->st_nlink; 82 ost->st_uid = st->st_uid; 83 ost->st_gid = st->st_gid; 84 ost->st_rdev = st->st_rdev; 85 ost->st_atimespec = st->st_atimespec; 86 ost->st_mtimespec = st->st_mtimespec; 87 ost->st_ctimespec = st->st_ctimespec; 88 ost->st_size = st->st_size; 89 ost->st_blocks = st->st_blocks; 90 ost->st_blksize = st->st_blksize; 91 ost->st_flags = st->st_flags; 92 ost->st_gen = st->st_gen; 93 } 94 95 /* 96 * Read a block of directory entries in a file system independent format. 97 */ 98 int 99 compat_12_sys_getdirentries(struct lwp *l, void *v, register_t *retval) 100 { 101 struct compat_12_sys_getdirentries_args /* { 102 syscallarg(int) fd; 103 syscallarg(char *) buf; 104 syscallarg(u_int) count; 105 syscallarg(long *) basep; 106 } */ *uap = v; 107 struct proc *p = l->l_proc; 108 struct file *fp; 109 int error, done; 110 long loff; 111 112 /* getvnode() will use the descriptor for us */ 113 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 114 return error; 115 if ((fp->f_flag & FREAD) == 0) { 116 error = EBADF; 117 goto out; 118 } 119 120 loff = fp->f_offset; 121 122 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 123 SCARG(uap, count), &done, p, 0, 0); 124 125 error = copyout(&loff, SCARG(uap, basep), sizeof(long)); 126 *retval = done; 127 out: 128 FILE_UNUSE(fp, p); 129 return error; 130 } 131 132 /* 133 * Get file status; this version follows links. 134 */ 135 /* ARGSUSED */ 136 int 137 compat_12_sys_stat(struct lwp *l, void *v, register_t *retval) 138 { 139 struct compat_12_sys_stat_args /* { 140 syscallarg(const char *) path; 141 syscallarg(struct stat12 *) ub; 142 } */ *uap = v; 143 struct proc *p = l->l_proc; 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(struct lwp *l, void *v, register_t *retval) 169 { 170 struct compat_12_sys_lstat_args /* { 171 syscallarg(const char *) path; 172 syscallarg(struct stat12 *) ub; 173 } */ *uap = v; 174 struct proc *p = l->l_proc; 175 struct stat sb; 176 struct stat12 osb; 177 int error; 178 struct nameidata nd; 179 180 NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE, 181 SCARG(uap, path), p); 182 if ((error = namei(&nd)) != 0) 183 return (error); 184 error = vn_stat(nd.ni_vp, &sb, p); 185 vput(nd.ni_vp); 186 if (error) 187 return (error); 188 cvtstat(&sb, &osb); 189 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 190 return (error); 191 } 192 193 /* 194 * Return status information about a file descriptor. 195 */ 196 /* ARGSUSED */ 197 int 198 compat_12_sys_fstat(struct lwp *l, void *v, register_t *retval) 199 { 200 struct compat_12_sys_fstat_args /* { 201 syscallarg(int) fd; 202 syscallarg(struct stat12 *) sb; 203 } */ *uap = v; 204 struct proc *p = l->l_proc; 205 int fd = SCARG(uap, fd); 206 struct filedesc *fdp = p->p_fd; 207 struct file *fp; 208 struct stat ub; 209 struct stat12 oub; 210 int error; 211 212 if ((fp = fd_getfile(fdp, fd)) == NULL) 213 return (EBADF); 214 215 FILE_USE(fp); 216 error = (*fp->f_ops->fo_stat)(fp, &ub, p); 217 FILE_UNUSE(fp, p); 218 219 if (error == 0) { 220 cvtstat(&ub, &oub); 221 error = copyout(&oub, SCARG(uap, sb), sizeof (oub)); 222 } 223 return (error); 224 } 225
Indexes created Sun Sep 28 16:09:52 GMT 2025