1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 
  22 /*
  23  * Copyright (c) 1994, 2010, Oracle and/or its affiliates. All rights reserved.
  24  * Copyright 2017 Nexenta Systems, Inc.  All rights reserved.
  25  */
  26 
  27 /*      Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
  28 /*        All Rights Reserved   */
  29 
  30 /*
  31  * Portions of this source code were derived from Berkeley 4.3 BSD
  32  * under license from the Regents of the University of California.
  33  */
  34 
  35 /*
  36  * Modified version of syscall/unlink.c
  37  */
  38 
  39 #include <sys/param.h>
  40 #include <sys/isa_defs.h>
  41 #include <sys/types.h>
  42 #include <sys/sysmacros.h>
  43 #include <sys/systm.h>
  44 #include <sys/errno.h>
  45 #include <sys/vnode.h>
  46 #include <sys/vfs.h>
  47 #include <sys/uio.h>
  48 #include <sys/debug.h>
  49 #include <sys/file.h>
  50 #include <sys/fcntl.h>
  51 
  52 #include <libfksmbfs.h>
  53 
  54 /*
  55  * Unlink a file from a directory
  56  * Like syscall/unlinkat.c
  57  */
  58 int
  59 fake_unlink(char *path, int flags)
  60 {
  61         vnode_t *dvp = NULL;
  62         char *lastcomp = NULL;
  63         int error;
  64 
  65         if (path == NULL)
  66                 return (EFAULT);
  67 
  68         error = fake_lookup_dir(path, &dvp, &lastcomp);
  69         if (error != 0)
  70                 return (error);
  71 
  72         /*
  73          * Some logic from vn_removeat() here
  74          */
  75         if (dvp->v_vfsp->vfs_flag & VFS_RDONLY) {
  76                 error = EROFS;
  77                 goto out;
  78         }
  79 
  80         if (flags == AT_REMOVEDIR) {
  81                 error = VOP_RMDIR(dvp, lastcomp, NULL, CRED(), NULL, 0);
  82         } else {
  83                 error = VOP_REMOVE(dvp, lastcomp, CRED(), NULL, 0);
  84         }
  85 
  86 out:
  87         if (dvp != NULL)
  88                 VN_RELE(dvp);
  89 
  90         return (error);
  91 }