tools/regression/priv/priv_vfs_fhopen.c

   1 /*-
   2  * Copyright (c) 2006 nCircle Network Security, Inc.
   3  * Copyright (c) 2007 Robert N. M. Watson
   4  * All rights reserved.
   5  *
   6  * This software was developed by Robert N. M. Watson for the TrustedBSD
   7  * Project under contract to nCircle Network Security, Inc.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR, NCIRCLE NETWORK SECURITY,
  22  * INC., OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  24  * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  25  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  26  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  27  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  28  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  *
  30  * $FreeBSD$
  31  */
  32
  33 /*
  34  * Confirm that calls to fhopen() require non-jailed priilege.  We create a
  35  * temporary file and grab the file handle using getfh() before starting.
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/mount.h>
  40
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <fcntl.h>
  44 #include <unistd.h>
  45
  46 #include "main.h"
  47
  48 static char fpath[1024];
  49 static int fpath_initialized;
  50 static fhandle_t fh;
  51
  52 int
  53 priv_vfs_fhopen_setup(int asroot, int injail, struct test *test)
  54 {
  55
  56         setup_file("private_vfs_fhopen_setup: fpath", fpath, UID_ROOT,
  57             GID_WHEEL, 0644);
  58         fpath_initialized = 1;
  59         if (getfh(fpath, &fh) < 0) {
  60                 warn("priv_vfs_fhopen_setup: getfh(%s)", fpath);
  61                 return (-1);
  62         }
  63         return (0);
  64 }
  65
  66 void
  67 priv_vfs_fhopen(int asroot, int injail, struct test *test)
  68 {
  69         int errno_saved, error, fd;
  70
  71         fd = fhopen(&fh, O_RDONLY);
  72         if (fd >= 0) {
  73                 error = 0;
  74                 errno_saved = errno;
  75                 close(fd);
  76                 errno = errno_saved;
  77         } else
  78                 error = -1;
  79         if (asroot && injail)
  80                 expect("priv_vfs_fhopen(asroot, injail)", error, -1, EPERM);
  81         if (asroot && !injail)
  82                 expect("priv_vfs_fhopen(asroot, !injail)", error, 0, 0);
  83         if (!asroot && injail)
  84                 expect("priv_vfs_fhopen(!asroot, injail)", error, -1, EPERM);
  85         if (!asroot && !injail)
  86                 expect("priv_vfs_fhopen(!asroot, !injail)", error, -1, EPERM);
  87 }
  88
  89 void
  90 priv_vfs_fhopen_cleanup(int asroot, int injail, struct test *test)
  91 {
  92
  93         if (fpath_initialized) {
  94                 (void)unlink(fpath);
  95                 fpath_initialized = 0;
  96         }
  97 }