FreeBSD/Linux Kernel Cross Reference
sys/compat/osf1/osf1_prot.c

     /* $NetBSD: osf1_prot.c,v 1.13 2007/12/20 23:03:03 dsl Exp $ */
     
     /*
      * Copyright (c) 1999 Christopher G. Demetriou.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Christopher G. Demetriou
     *      for the NetBSD Project.
     * 4. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    /*
     * Copyright (c) 1994, 1995 Carnegie-Mellon University.
     * All rights reserved.
     *
     * Author: Chris G. Demetriou
     *
     * Permission to use, copy, modify and distribute this software and
     * its documentation is hereby granted, provided that both the copyright
     * notice and this permission notice appear in all copies of the
     * software, derivative works or modified versions, and any portions
     * thereof, and that both notices appear in supporting documentation.
     *
     * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
     * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
     * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
     *
     * Carnegie Mellon requests users of this software to return to
     *
     *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
     *  School of Computer Science
     *  Carnegie Mellon University
     *  Pittsburgh PA 15213-3890
     *
     * any improvements or extensions that they make and grant Carnegie the
     * rights to redistribute these changes.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: osf1_prot.c,v 1.13 2007/12/20 23:03:03 dsl Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/proc.h>
    #include <sys/prot.h>
    #include <sys/mount.h>
    #include <sys/syscallargs.h>
    
    #include <compat/osf1/osf1.h>
    #include <compat/osf1/osf1_syscallargs.h>
    #include <compat/osf1/osf1_cvt.h>
    
    /*
     * OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
     * setgid() won't work.
     *
     * If you change "uid" to "gid" in the discussion, below, about
     * setuid(), you'll get a correct description of setgid().
     */
    int
    osf1_sys_setgid(struct lwp *l, const struct osf1_sys_setgid_args *uap, register_t *retval)
    {
            gid_t gid = SCARG(uap, gid);
            int error;
    
            error = do_setresgid(l, gid, gid, gid, 0);
            if (error != 0)
                    error = do_setresgid(l, -1, gid, -1, ID_E_EQ_R | ID_E_EQ_S );
            return error;
    }
    
    /*
     * OSF/1 defines _POSIX_SAVED_IDS, which means that our normal
     * setuid() won't work.
     *
     * Instead, by P1003.1b-1993, setuid() is supposed to work like:
     *      If the process has appropriate [super-user] privileges, the
     *          setuid() function sets the real user ID, effective user
    *          ID, and the saved set-user-ID to uid.
    *      If the process does not have appropriate privileges, but uid
    *          is equal to the real user ID or the saved set-user-ID, the
    *          setuid() function sets the effective user ID to uid; the
    *          real user ID and saved set-user-ID remain unchanged by
    *          this function call.
    */
   int
   osf1_sys_setuid(struct lwp *l, const struct osf1_sys_setuid_args *uap, register_t *retval)
   {
           uid_t uid = SCARG(uap, uid);
           int error;
   
           error = do_setresuid(l, uid, uid, uid, 0);
           if (error != 0)
                   error = do_setresuid(l, -1, uid, -1, ID_E_EQ_R | ID_E_EQ_S );
           return error;
   }

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