sys/compat/osf1/osf1_prot.c

   1 /* $NetBSD: osf1_prot.c,v 1.12 2007/12/08 18:36:21 dsl Exp $ */
   2
   3 /*
   4  * Copyright (c) 1999 Christopher G. Demetriou.  All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. All advertising materials mentioning features or use of this software
  15  *    must display the following acknowledgement:
  16  *      This product includes software developed by Christopher G. Demetriou
  17  *      for the NetBSD Project.
  18  * 4. The name of the author may not be used to endorse or promote products
  19  *    derived from this software without specific prior written permission
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 /*
  34  * Copyright (c) 1994, 1995 Carnegie-Mellon University.
  35  * All rights reserved.
  36  *
  37  * Author: Chris G. Demetriou
  38  *
  39  * Permission to use, copy, modify and distribute this software and
  40  * its documentation is hereby granted, provided that both the copyright
  41  * notice and this permission notice appear in all copies of the
  42  * software, derivative works or modified versions, and any portions
  43  * thereof, and that both notices appear in supporting documentation.
  44  *
  45  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  46  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
  47  * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  48  *
  49  * Carnegie Mellon requests users of this software to return to
  50  *
  51  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  52  *  School of Computer Science
  53  *  Carnegie Mellon University
  54  *  Pittsburgh PA 15213-3890
  55  *
  56  * any improvements or extensions that they make and grant Carnegie the
  57  * rights to redistribute these changes.
  58  */
  59
  60 #include <sys/cdefs.h>
  61 __KERNEL_RCSID(0, "$NetBSD: osf1_prot.c,v 1.12 2007/12/08 18:36:21 dsl Exp $");
  62
  63 #include <sys/param.h>
  64 #include <sys/systm.h>
  65 #include <sys/proc.h>
  66 #include <sys/prot.h>
  67 #include <sys/mount.h>
  68 #include <sys/syscallargs.h>
  69
  70 #include <compat/osf1/osf1.h>
  71 #include <compat/osf1/osf1_syscallargs.h>
  72 #include <compat/osf1/osf1_cvt.h>
  73
  74 /*
  75  * OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
  76  * setgid() won't work.
  77  *
  78  * If you change "uid" to "gid" in the discussion, below, about
  79  * setuid(), you'll get a correct description of setgid().
  80  */
  81 int
  82 osf1_sys_setgid(struct lwp *l, const struct osf1_sys_setgid_args *uap, register_t *retval)
  83 {
  84         gid_t gid = SCARG(uap, gid);
  85         int error;
  86
  87         error = do_setresgid(l, gid, gid, gid, 0);
  88         if (error != 0)
  89                 error = do_setresgid(l, -1, gid, -1, ID_E_EQ_R | ID_E_EQ_S );
  90         return error;
  91 }
  92
  93 /*
  94  * OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
  95  * setuid() won't work.
  96  *
  97  * Instead, by P1003.1b-1993, setuid() is supposed to work like:
  98  *      If the process has appropriate [super-user] privileges, the
  99  *          setuid() function sets the real user ID, effective user
 100  *          ID, and the saved set-user-ID to uid.
 101  *      If the process does not have appropriate privileges, but uid
 102  *          is equal to the real user ID or the saved set-user-ID, the
 103  *          setuid() function sets the effective user ID to uid; the
 104  *          real user ID and saved set-user-ID remain unchanged by
 105  *          this function call.
 106  */
 107 int
 108 osf1_sys_setuid(struct lwp *l, const struct osf1_sys_setuid_args *uap, register_t *retval)
 109 {
 110         uid_t uid = SCARG(uap, uid);
 111         int error;
 112
 113         error = do_setresuid(l, uid, uid, uid, 0);
 114         if (error != 0)
 115                 error = do_setresuid(l, -1, uid, -1, ID_E_EQ_R | ID_E_EQ_S );
 116         return error;
 117 }