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freebsd_misc.c revision 1.3.2.1 
      1 /*	$NetBSD: freebsd_misc.c,v 1.3.2.1 1998/09/30 18:16:38 cgd Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1995 Frank van der Linden
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. All advertising materials mentioning features or use of this software
     16  *    must display the following acknowledgement:
     17  *      This product includes software developed for the NetBSD Project
     18  *      by Frank van der Linden
     19  * 4. The name of the author may not be used to endorse or promote products
     20  *    derived from this software without specific prior written permission
     21  *
     22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 /*
     35  * FreeBSD compatibility module. Try to deal with various FreeBSD system calls.
     36  */
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/proc.h>
     41 #include <sys/mount.h>
     42 
     43 #include <sys/syscallargs.h>
     44 
     45 #include <compat/freebsd/freebsd_syscallargs.h>
     46 #include <compat/freebsd/freebsd_util.h>
     47 #include <compat/freebsd/freebsd_rtprio.h>
     48 #include <compat/freebsd/freebsd_timex.h>
     49 
     50 int
     51 freebsd_sys_msync(p, v, retval)
     52 	struct proc *p;
     53 	void *v;
     54 	register_t *retval;
     55 {
     56 	struct freebsd_sys_msync_args /* {
     57 		syscallarg(caddr_t) addr;
     58 		syscallarg(size_t) len;
     59 		syscallarg(int) flags;
     60 	} */ *uap = v;
     61 	struct sys___msync13_args bma;
     62 
     63 	/*
     64 	 * FreeBSD-2.0-RELEASE's msync(2) is compatible with NetBSD's.
     65 	 * FreeBSD-2.0.5-RELEASE's msync(2) has addtional argument `flags',
     66 	 * but syscall number is not changed. :-<
     67 	 */
     68 	SCARG(&bma, addr) = SCARG(uap, addr);
     69 	SCARG(&bma, len) = SCARG(uap, len);
     70 	SCARG(&bma, flags) = SCARG(uap, flags);
     71 	return sys___msync13(p, &bma, retval);
     72 }
     73 
     74 /* just a place holder */
     75 
     76 int
     77 freebsd_sys_rtprio(p, v, retval)
     78 	struct proc *p;
     79 	void *v;
     80 	register_t *retval;
     81 {
     82 #ifdef notyet
     83 	struct freebsd_sys_rtprio_args /* {
     84 		syscallarg(int) function;
     85 		syscallarg(pid_t) pid;
     86 		syscallarg(struct freebsd_rtprio *) rtp;
     87 	} */ *uap = v;
     88 #endif
     89 
     90 	return ENOSYS;	/* XXX */
     91 }
     92 
     93 int
     94 freebsd_ntp_adjtime(p, v, retval)
     95 	struct proc *p;
     96 	void *v;
     97 	register_t *retval;
     98 {
     99 #ifdef notyet
    100 	struct freebsd_ntp_adjtime_args /* {
    101 		syscallarg(struct freebsd_timex *) tp;
    102 	} */ *uap = v;
    103 #endif
    104 
    105 	return ENOSYS;	/* XXX */
    106 }
    107 
    108 int
    109 freebsd_sys_issetugid(p, v, retval)
    110 	struct proc *p;
    111 	void *v;
    112 	register_t *retval;
    113 {
    114 	/*
    115 	 * Note: OpenBSD sets a P_SUGIDEXEC flag set at execve() time,
    116 	 * we use P_SUGID because we consider changing the owners as
    117 	 * "tainting" as well.
    118 	 * This is significant for procs that start as root and "become"
    119 	 * a user without an exec - programs cannot know *everything*
    120 	 * that libc *might* have put in their data segment.
    121 	 */
    122 	*retval = (p->p_flag & P_SUGID) != 0;
    123 	return 0;
    124 }
    125