usr/src/cmd/oamuser/lib/file.c

   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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*      Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
  23 /*        All Rights Reserved   */
  24
  25
  26 #ident  "%Z%%M% %I%     %E% SMI"       /* SVr4.0 1.3 */
  27
  28 #include        <sys/types.h>
  29 #include        <sys/stat.h>
  30
  31 int
  32 check_perm( statbuf, uid, gid, perm )
  33 struct stat statbuf;
  34 uid_t uid;
  35 gid_t gid;
  36 mode_t perm;
  37 {
  38         int fail = -1;  /* assume no permission at onset */
  39
  40         /* Make sure we're dealing with a directory */
  41         if( S_ISDIR( statbuf.st_mode )) {
  42
  43                 /*
  44                  * Have a directory, so make sure user has permission
  45                  * by the various possible methods to this directory.
  46                  */
  47                 if( (statbuf.st_uid == uid) &&
  48                     (statbuf.st_mode & (perm << 6)) == (perm << 6) )
  49                         fail = 0;
  50                 else
  51                 if( (statbuf.st_gid == gid) &&
  52                     (statbuf.st_mode & (perm << 3)) == (perm << 3) )
  53                         fail = 0;
  54                 else
  55                 if( (statbuf.st_mode & perm) == perm )
  56                         fail = 0;
  57         }
  58
  59         return( fail );
  60 }