sys/compat/ultrix/ultrix_pathname.c

   1 /*      $NetBSD: ultrix_pathname.c,v 1.37 2009/06/29 05:08:16 dholland Exp $    */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This software was developed by the Computer Systems Engineering group
   8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   9  * contributed to Berkeley.
  10  *
  11  * All advertising materials mentioning features or use of this software
  12  * must display the following acknowledgement:
  13  *      This product includes software developed by the University of
  14  *      California, Lawrence Berkeley Laboratory.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. 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  *
  41  *      @(#)sun_misc.c  8.1 (Berkeley) 6/18/93
  42  *
  43  * from: Header: sun_misc.c,v 1.16 93/04/07 02:46:27 torek Exp
  44  */
  45
  46
  47 /*
  48  * Ultrix emulation filesystem-namespace compatibility module.
  49  *
  50  * Ultrix system calls that examine the filesysten namespace
  51  * are implemented here.  Each system call has a wrapper that
  52  * first checks if the given file exists at a special `emulation'
  53  * pathname: the given path, prefixex with '/emul/ultrix', and
  54  * if that pathname exists, it is used instead of the providd pathname.
  55  *
  56  * Used to locate OS-specific files (shared libraries, config files,
  57  * etc) used by emul processes at their `normal' pathnames, without
  58  * polluting, or conflicting with, the native filesysten namespace.
  59  */
  60
  61 #include <sys/cdefs.h>
  62 __KERNEL_RCSID(0, "$NetBSD: ultrix_pathname.c,v 1.37 2009/06/29 05:08:16 dholland Exp $");
  63
  64 #include <sys/param.h>
  65 #include <sys/systm.h>
  66 #include <sys/namei.h>
  67 #include <sys/file.h>
  68 #include <sys/filedesc.h>
  69 #include <sys/ioctl.h>
  70 #include <sys/mount.h>
  71 #include <sys/stat.h>
  72 #include <sys/vnode.h>
  73 #include <sys/syscallargs.h>
  74 #include <sys/proc.h>
  75
  76 #include <compat/ultrix/ultrix_syscallargs.h>
  77 #include <compat/common/compat_util.h>
  78
  79 static int ultrixstatfs(struct statvfs *, void *);
  80
  81 int
  82 ultrix_sys_creat(struct lwp *l, const struct ultrix_sys_creat_args *uap, register_t *retval)
  83 {
  84         struct sys_open_args ap;
  85
  86         SCARG(&ap, path) = SCARG(uap, path);
  87         SCARG(&ap, flags) = O_WRONLY | O_CREAT | O_TRUNC;
  88         SCARG(&ap, mode) = SCARG(uap, mode);
  89
  90         return sys_open(l, &ap, retval);
  91 }
  92
  93
  94 int
  95 ultrix_sys_access(struct lwp *l, const struct ultrix_sys_access_args *uap, register_t *retval)
  96 {
  97
  98         return sys_access(l, (const struct sys_access_args *)uap, retval);
  99 }
 100
 101 int
 102 ultrix_sys_stat(struct lwp *l, const struct ultrix_sys_stat_args *uap, register_t *retval)
 103 {
 104
 105         return compat_43_sys_stat(l,
 106             (const struct compat_43_sys_stat_args *)uap, retval);
 107 }
 108
 109 int
 110 ultrix_sys_lstat(struct lwp *l, const struct ultrix_sys_lstat_args *uap, register_t *retval)
 111 {
 112
 113         return compat_43_sys_lstat(l,
 114             (const struct compat_43_sys_lstat_args *)uap, retval);
 115 }
 116
 117 int
 118 ultrix_sys_execv(struct lwp *l, const struct ultrix_sys_execv_args *uap, register_t *retval)
 119 {
 120         /* {
 121                 syscallarg(const char *) path;
 122                 syscallarg(char **) argv;
 123         } */
 124         struct sys_execve_args ap;
 125
 126         SCARG(&ap, path) = SCARG(uap, path);
 127         SCARG(&ap, argp) = SCARG(uap, argp);
 128         SCARG(&ap, envp) = NULL;
 129
 130         return sys_execve(l, &ap, retval);
 131 }
 132
 133 int
 134 ultrix_sys_execve(struct lwp *l, const struct ultrix_sys_execve_args *uap, register_t *retval)
 135 {
 136         /* {
 137                 syscallarg(const char *) path;
 138                 syscallarg(char **) argv;
 139                 syscallarg(char **) envp;
 140         } */
 141         struct sys_execve_args ap;
 142
 143         SCARG(&ap, path) = SCARG(uap, path);
 144         SCARG(&ap, argp) = SCARG(uap, argp);
 145         SCARG(&ap, envp) = SCARG(uap, envp);
 146
 147         return sys_execve(l, &ap, retval);
 148 }
 149
 150 int
 151 ultrix_sys_open(struct lwp *l, const struct ultrix_sys_open_args *uap, register_t *retval)
 152 {
 153         struct proc *p = l->l_proc;
 154         int q, r;
 155         int noctty;
 156         int ret;
 157         struct sys_open_args ap;
 158
 159         /* convert open flags into NetBSD flags */
 160
 161         q = SCARG(uap, flags);
 162         noctty = q & 0x8000;
 163         r =     (q & (0x0001 | 0x0002 | 0x0008 | 0x0040 | 0x0200 | 0x0400 | 0x0800));
 164         r |=    ((q & (0x0004 | 0x1000 | 0x4000)) ? O_NONBLOCK : 0);
 165         r |=    ((q & 0x0080) ? O_SHLOCK : 0);
 166         r |=    ((q & 0x0100) ? O_EXLOCK : 0);
 167         r |=    ((q & 0x2000) ? O_FSYNC : 0);
 168
 169         SCARG(&ap, path) = SCARG(uap, path);
 170         SCARG(&ap, flags) = r;
 171         SCARG(&ap, mode) = SCARG(uap, mode);
 172         ret = sys_open(l, &ap, retval);
 173
 174         /* XXXSMP */
 175         if (!ret && !noctty && SESS_LEADER(p) && !(p->p_lflag & PL_CONTROLT)) {
 176                 file_t *fp;
 177                 int fd;
 178
 179                 fd = (int)*retval;
 180                 fp = fd_getfile(fd);
 181
 182                 /* ignore any error, just give it a try */
 183                 if (fp != NULL) {
 184                         if (fp->f_type == DTYPE_VNODE)
 185                                 (fp->f_ops->fo_ioctl)(fp, TIOCSCTTY, NULL);
 186                         fd_putfile(fd);
 187                 }
 188         }
 189         return ret;
 190 }
 191
 192
 193 struct ultrix_statfs {
 194         int32_t f_type;         /* type of info, zero for now */
 195         int32_t f_bsize;        /* fundamental file system block size */
 196         int32_t f_blocks;       /* total blocks in file system */
 197         int32_t f_bfree;        /* free blocks */
 198         int32_t f_bavail;       /* free blocks available to non-super-user */
 199         int32_t f_files;        /* total file nodes in file system */
 200         int32_t f_ffree;        /* free file nodes in fs */
 201         fsid_t  f_fsid;         /* file system id */
 202         int32_t f_spare[7];     /* spare for later */
 203 };
 204
 205 /*
 206  * Custruct ultrix statfs result from native.
 207  * XXX should this be the same as returned by Ultrix getmnt(2)?
 208  * XXX Ultrix predates DEV_BSIZE.  Is  conversion of disk space from 1k
 209  *  block units to DEV_BSIZE necessary?
 210  */
 211 static int
 212 ultrixstatfs(struct statvfs *sp, void *buf)
 213 {
 214         struct ultrix_statfs ssfs;
 215
 216         memset(&ssfs, 0, sizeof ssfs);
 217         ssfs.f_type = 0;
 218         ssfs.f_bsize = sp->f_bsize;
 219         ssfs.f_blocks = sp->f_blocks;
 220         ssfs.f_bfree = sp->f_bfree;
 221         ssfs.f_bavail = sp->f_bavail;
 222         ssfs.f_files = sp->f_files;
 223         ssfs.f_ffree = sp->f_ffree;
 224         ssfs.f_fsid = sp->f_fsidx;
 225         return copyout((void *)&ssfs, buf, sizeof ssfs);
 226 }
 227
 228
 229 int
 230 ultrix_sys_statfs(struct lwp *l, const struct ultrix_sys_statfs_args *uap, register_t *retval)
 231 {
 232         struct mount *mp;
 233         struct statvfs *sp;
 234         int error;
 235         struct vnode *vp;
 236
 237         error = namei_simple_user(SCARG(uap, path),
 238                                 NSM_FOLLOW_TRYEMULROOT, &vp);
 239         if (error != 0)
 240                 return error;
 241
 242         mp = vp->v_mount;
 243         sp = &mp->mnt_stat;
 244         vrele(vp);
 245         if ((error = VFS_STATVFS(mp, sp)) != 0)
 246                 return error;
 247         sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK;
 248         return ultrixstatfs(sp, (void *)SCARG(uap, buf));
 249 }
 250
 251 /*
 252  * sys_fstatfs() takes an fd, not a path, and so needs no emul
 253  * pathname processing;  but it's similar enough to sys_statvfs() that
 254  * it goes here anyway.
 255  */
 256 int
 257 ultrix_sys_fstatfs(struct lwp *l, const struct ultrix_sys_fstatfs_args *uap, register_t *retval)
 258 {
 259         file_t *fp;
 260         struct mount *mp;
 261         struct statvfs *sp;
 262         int error;
 263
 264         /* fd_getvnode() will use the descriptor for us */
 265         if ((error = fd_getvnode(SCARG(uap, fd), &fp)) != 0)
 266                 return error;
 267         mp = ((struct vnode *)fp->f_data)->v_mount;
 268         sp = &mp->mnt_stat;
 269         if ((error = VFS_STATVFS(mp, sp)) != 0)
 270                 goto out;
 271         sp->f_flag = mp->mnt_flag & MNT_VISFLAGMASK;
 272         error = ultrixstatfs(sp, (void *)SCARG(uap, buf));
 273  out:
 274         fd_putfile(SCARG(uap, fd));
 275         return error;
 276 }
 277
 278 int
 279 ultrix_sys_mknod(struct lwp *l, const struct ultrix_sys_mknod_args *uap, register_t *retval)
 280 {
 281
 282         if (S_ISFIFO(SCARG(uap, mode)))
 283                 return sys_mkfifo(l, (const struct sys_mkfifo_args *)uap,
 284                     retval);
 285
 286         return compat_50_sys_mknod(l,
 287                                    (const struct compat_50_sys_mknod_args *)uap,
 288                                    retval);
 289 }