1 /* $NetBSD: vfs_syscalls_12.c,v 1.23 2007/12/12 21:37:30 dsl 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. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * From: @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: vfs_syscalls_12.c,v 1.23 2007/12/12 21:37:30 dsl Exp $"); 41 42 #include <sys/param.h> 43 #include <sys/systm.h> 44 #include <sys/namei.h> 45 #include <sys/filedesc.h> 46 #include <sys/kernel.h> 47 #include <sys/file.h> 48 #include <sys/stat.h> 49 #include <sys/socketvar.h> 50 #include <sys/vnode.h> 51 #include <sys/mount.h> 52 #include <sys/proc.h> 53 #include <sys/uio.h> 54 #include <sys/dirent.h> 55 #include <sys/vfs_syscalls.h> 56 57 #include <sys/syscallargs.h> 58 59 #include <compat/sys/stat.h> 60 61 /* 62 * Convert from a new to an old stat structure. 63 */ 64 void 65 compat_12_stat_conv(const struct stat *st, struct stat12 *ost) 66 { 67 68 ost->st_dev = st->st_dev; 69 ost->st_ino = st->st_ino; 70 ost->st_mode = st->st_mode & 0xffff; 71 if (st->st_nlink >= (1 << 15)) 72 ost->st_nlink = (1 << 15) - 1; 73 else 74 ost->st_nlink = st->st_nlink; 75 ost->st_uid = st->st_uid; 76 ost->st_gid = st->st_gid; 77 ost->st_rdev = st->st_rdev; 78 ost->st_atimespec = st->st_atimespec; 79 ost->st_mtimespec = st->st_mtimespec; 80 ost->st_ctimespec = st->st_ctimespec; 81 ost->st_size = st->st_size; 82 ost->st_blocks = st->st_blocks; 83 ost->st_blksize = st->st_blksize; 84 ost->st_flags = st->st_flags; 85 ost->st_gen = st->st_gen; 86 } 87 88 /* 89 * Read a block of directory entries in a file system independent format. 90 */ 91 int 92 compat_12_sys_getdirentries(struct lwp *l, void *v, register_t *retval) 93 { 94 struct compat_12_sys_getdirentries_args /* { 95 syscallarg(int) fd; 96 syscallarg(char *) buf; 97 syscallarg(u_int) count; 98 syscallarg(long *) basep; 99 } */ *uap = v; 100 struct proc *p = l->l_proc; 101 struct file *fp; 102 int error, done; 103 long loff; 104 105 /* getvnode() will use the descriptor for us */ 106 if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0) 107 return error; 108 if ((fp->f_flag & FREAD) == 0) { 109 error = EBADF; 110 goto out; 111 } 112 113 loff = fp->f_offset; 114 115 error = vn_readdir(fp, SCARG(uap, buf), UIO_USERSPACE, 116 SCARG(uap, count), &done, l, 0, 0); 117 118 error = copyout(&loff, SCARG(uap, basep), sizeof(long)); 119 *retval = done; 120 out: 121 FILE_UNUSE(fp, l); 122 return error; 123 } 124 125 /* 126 * Get file status; this version follows links. 127 */ 128 /* ARGSUSED */ 129 int 130 compat_12_sys_stat(struct lwp *l, void *v, register_t *retval) 131 { 132 struct compat_12_sys_stat_args /* { 133 syscallarg(const char *) path; 134 syscallarg(struct stat12 *) ub; 135 } */ *uap = v; 136 struct stat sb; 137 struct stat12 osb; 138 int error; 139 140 error = do_sys_stat(l, SCARG(uap, path), FOLLOW, &sb); 141 if (error) 142 return (error); 143 compat_12_stat_conv(&sb, &osb); 144 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 145 return (error); 146 } 147 148 149 /* 150 * Get file status; this version does not follow links. 151 */ 152 /* ARGSUSED */ 153 int 154 compat_12_sys_lstat(struct lwp *l, void *v, register_t *retval) 155 { 156 struct compat_12_sys_lstat_args /* { 157 syscallarg(const char *) path; 158 syscallarg(struct stat12 *) ub; 159 } */ *uap = v; 160 struct stat sb; 161 struct stat12 osb; 162 int error; 163 164 error = do_sys_stat(l, SCARG(uap, path), NOFOLLOW, &sb); 165 if (error) 166 return (error); 167 compat_12_stat_conv(&sb, &osb); 168 error = copyout(&osb, SCARG(uap, ub), sizeof (osb)); 169 return (error); 170 } 171 172 /* 173 * Return status information about a file descriptor. 174 */ 175 /* ARGSUSED */ 176 int 177 compat_12_sys_fstat(struct lwp *l, void *v, register_t *retval) 178 { 179 struct compat_12_sys_fstat_args /* { 180 syscallarg(int) fd; 181 syscallarg(struct stat12 *) sb; 182 } */ *uap = v; 183 struct proc *p = l->l_proc; 184 int fd = SCARG(uap, fd); 185 struct filedesc *fdp = p->p_fd; 186 struct file *fp; 187 struct stat ub; 188 struct stat12 oub; 189 int error; 190 191 if ((fp = fd_getfile(fdp, fd)) == NULL) 192 return (EBADF); 193 194 FILE_USE(fp); 195 error = (*fp->f_ops->fo_stat)(fp, &ub, l); 196 FILE_UNUSE(fp, l); 197 198 if (error == 0) { 199 compat_12_stat_conv(&ub, &oub); 200 error = copyout(&oub, SCARG(uap, sb), sizeof (oub)); 201 } 202 return (error); 203 } 204