Annotation of sys/compat/common/vfs_syscalls_35.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: vfs_syscalls_35.c,v 1.3 2004/07/14 18:57:57 millert 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: * @(#)vfs_syscalls.c 8.28 (Berkeley) 12/10/94
! 37: */
! 38:
! 39: #include <sys/param.h>
! 40: #include <sys/systm.h>
! 41: #include <sys/filedesc.h>
! 42: #include <sys/kernel.h>
! 43: #include <sys/proc.h>
! 44: #include <sys/file.h>
! 45: #include <sys/vnode.h>
! 46: #include <sys/namei.h>
! 47: #include <sys/dirent.h>
! 48: #include <sys/socket.h>
! 49: #include <sys/socketvar.h>
! 50: #include <sys/stat.h>
! 51:
! 52: #include <sys/mount.h>
! 53: #include <sys/syscallargs.h>
! 54:
! 55: static void cvtstat(struct stat *, struct stat35 *);
! 56:
! 57: /*
! 58: * Convert from a new to an old stat structure.
! 59: */
! 60: static void
! 61: cvtstat(struct stat *st, struct stat35 *ost)
! 62: {
! 63:
! 64: ost->st_dev = st->st_dev;
! 65: ost->st_ino = st->st_ino;
! 66: ost->st_mode = st->st_mode & 0xffff;
! 67: ost->st_nlink = st->st_nlink & 0xffff;
! 68: ost->st_uid = st->st_uid;
! 69: ost->st_gid = st->st_gid;
! 70: ost->st_rdev = st->st_rdev;
! 71: ost->st_atimespec = st->st_atimespec;
! 72: ost->st_mtimespec = st->st_mtimespec;
! 73: ost->st_ctimespec = st->st_ctimespec;
! 74: ost->st_size = st->st_size;
! 75: ost->st_blocks = st->st_blocks;
! 76: ost->st_blksize = st->st_blksize;
! 77: ost->st_flags = st->st_flags;
! 78: ost->st_gen = st->st_gen;
! 79: }
! 80:
! 81: /*
! 82: * Get file status; this version follows links.
! 83: */
! 84: /* ARGSUSED */
! 85: int
! 86: compat_35_sys_stat(struct proc *p, void *v, register_t *retval)
! 87: {
! 88: struct compat_35_sys_stat_args /* {
! 89: syscallarg(char *) path;
! 90: syscallarg(struct stat35 *) ub;
! 91: } */ *uap = v;
! 92: struct stat sb;
! 93: struct stat35 osb;
! 94: int error;
! 95: struct nameidata nd;
! 96:
! 97: NDINIT(&nd, LOOKUP, FOLLOW | LOCKLEAF, UIO_USERSPACE,
! 98: SCARG(uap, path), p);
! 99: if ((error = namei(&nd)) != 0)
! 100: return (error);
! 101: error = vn_stat(nd.ni_vp, &sb, p);
! 102: vput(nd.ni_vp);
! 103: if (error)
! 104: return (error);
! 105: /* Don't let non-root see generation numbers (for NFS security) */
! 106: if (suser(p, 0))
! 107: sb.st_gen = 0;
! 108: cvtstat(&sb, &osb);
! 109: error = copyout(&osb, SCARG(uap, ub), sizeof(osb));
! 110: return (error);
! 111: }
! 112:
! 113: /*
! 114: * Get file status; this version does not follow links.
! 115: */
! 116: /* ARGSUSED */
! 117: int
! 118: compat_35_sys_lstat(struct proc *p, void *v, register_t *retval)
! 119: {
! 120: struct compat_35_sys_lstat_args /* {
! 121: syscallarg(char *) path;
! 122: syscallarg(struct stat35 *) ub;
! 123: } */ *uap = v;
! 124: struct stat sb;
! 125: struct stat35 osb;
! 126: int error;
! 127: struct nameidata nd;
! 128:
! 129: NDINIT(&nd, LOOKUP, NOFOLLOW | LOCKLEAF, UIO_USERSPACE,
! 130: SCARG(uap, path), p);
! 131: if ((error = namei(&nd)) != 0)
! 132: return (error);
! 133: error = vn_stat(nd.ni_vp, &sb, p);
! 134: vput(nd.ni_vp);
! 135: if (error)
! 136: return (error);
! 137: /* Don't let non-root see generation numbers (for NFS security) */
! 138: if (suser(p, 0))
! 139: sb.st_gen = 0;
! 140: cvtstat(&sb, &osb);
! 141: error = copyout(&osb, SCARG(uap, ub), sizeof(osb));
! 142: return (error);
! 143: }
! 144:
! 145: /*
! 146: * Return status information about a file descriptor.
! 147: */
! 148: /* ARGSUSED */
! 149: int
! 150: compat_35_sys_fstat(struct proc *p, void *v, register_t *retval)
! 151: {
! 152: struct compat_35_sys_fstat_args /* {
! 153: syscallarg(int) fd;
! 154: syscallarg(struct stat35 *) sb;
! 155: } */ *uap = v;
! 156: int fd = SCARG(uap, fd);
! 157: struct filedesc *fdp = p->p_fd;
! 158: struct file *fp;
! 159: struct stat ub;
! 160: struct stat35 oub;
! 161: int error;
! 162:
! 163: if ((fp = fd_getfile(fdp, fd)) == NULL)
! 164: return (EBADF);
! 165: FREF(fp);
! 166: error = (*fp->f_ops->fo_stat)(fp, &ub, p);
! 167: FRELE(fp);
! 168: if (error == 0) {
! 169: /* Don't let non-root see generation numbers
! 170: (for NFS security) */
! 171: if (suser(p, 0))
! 172: ub.st_gen = 0;
! 173: cvtstat(&ub, &oub);
! 174: error = copyout(&oub, SCARG(uap, sb), sizeof(oub));
! 175: }
! 176: return (error);
! 177: }
! 178:
! 179: /* ARGSUSED */
! 180: int
! 181: compat_35_sys_fhstat(struct proc *p, void *v, register_t *retval)
! 182: {
! 183: struct sys_fhstat_args /* {
! 184: syscallarg(const fhandle_t *) fhp;
! 185: syscallarg(struct stat35 *) sb;
! 186: } */ *uap = v;
! 187: struct stat ub;
! 188: struct stat35 oub;
! 189: int error;
! 190: fhandle_t fh;
! 191: struct mount *mp;
! 192: struct vnode *vp;
! 193:
! 194: /*
! 195: * Must be super user
! 196: */
! 197: if ((error = suser(p, 0)))
! 198: return (error);
! 199:
! 200: if ((error = copyin(SCARG(uap, fhp), &fh, sizeof(fhandle_t))) != 0)
! 201: return (error);
! 202:
! 203: if ((mp = vfs_getvfs(&fh.fh_fsid)) == NULL)
! 204: return (ESTALE);
! 205: if ((error = VFS_FHTOVP(mp, &fh.fh_fid, &vp)))
! 206: return (error);
! 207: error = vn_stat(vp, &ub, p);
! 208: vput(vp);
! 209: if (error)
! 210: return (error);
! 211: cvtstat(&ub, &oub);
! 212: error = copyout(&oub, SCARG(uap, sb), sizeof(oub));
! 213: return (error);
! 214: }
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