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      1 /*	$NetBSD: kern_resource_43.c,v 1.23 2021/09/07 11:43:02 riastradh Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1982, 1986, 1991, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  * (c) UNIX System Laboratories, Inc.
      7  * All or some portions of this file are derived from material licensed
      8  * to the University of California by American Telephone and Telegraph
      9  * Co. or Unix System Laboratories, Inc. and are reproduced herein with
     10  * the permission of UNIX System Laboratories, Inc.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. Neither the name of the University nor the names of its contributors
     21  *    may be used to endorse or promote products derived from this software
     22  *    without specific prior written permission.
     23  *
     24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     34  * SUCH DAMAGE.
     35  *
     36  *	@(#)kern_resource.c	8.5 (Berkeley) 1/21/94
     37  */
     38 
     39 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: kern_resource_43.c,v 1.23 2021/09/07 11:43:02 riastradh Exp $");
     41 
     42 #if defined(_KERNEL_OPT)
     43 #include "opt_compat_netbsd.h"
     44 #endif
     45 
     46 #include <sys/param.h>
     47 #include <sys/systm.h>
     48 #include <sys/kernel.h>
     49 #include <sys/file.h>
     50 #include <sys/resourcevar.h>
     51 #include <sys/proc.h>
     52 
     53 #include <sys/mount.h>
     54 #include <sys/syscall.h>
     55 #include <sys/syscallvar.h>
     56 #include <sys/syscallargs.h>
     57 
     58 #include <compat/common/compat_mod.h>
     59 
     60 static struct syscall_package kern_resource_43_syscalls[] = {
     61 	{ SYS_compat_43_ogetrlimit, 0, (sy_call_t *)compat_43_sys_getrlimit },
     62 	{ SYS_compat_43_osetrlimit, 0, (sy_call_t *)compat_43_sys_setrlimit },
     63 	{ 0, 0, NULL }
     64 };
     65 
     66 /* ARGSUSED */
     67 int
     68 compat_43_sys_getrlimit(struct lwp *l, const struct compat_43_sys_getrlimit_args *uap, register_t *retval)
     69 {
     70 	/* {
     71 		syscallarg(int) which;
     72 		syscallarg(struct orlimit *) rlp;
     73 	} */
     74 	struct proc *p = l->l_proc;
     75 	int which = SCARG(uap, which);
     76 	struct orlimit olim;
     77 
     78 	if ((u_int)which >= RLIM_NLIMITS)
     79 		return (EINVAL);
     80 	memset(&olim, 0, sizeof(olim));
     81 	olim.rlim_cur = p->p_rlimit[which].rlim_cur;
     82 	if (olim.rlim_cur == -1)
     83 		olim.rlim_cur = 0x7fffffff;
     84 	olim.rlim_max = p->p_rlimit[which].rlim_max;
     85 	if (olim.rlim_max == -1)
     86 		olim.rlim_max = 0x7fffffff;
     87 	return copyout(&olim, SCARG(uap, rlp), sizeof(olim));
     88 }
     89 
     90 /* ARGSUSED */
     91 int
     92 compat_43_sys_setrlimit(struct lwp *l, const struct compat_43_sys_setrlimit_args *uap, register_t *retval)
     93 {
     94 	/* {
     95 		syscallarg(int) which;
     96 		syscallarg(const struct orlimit *) rlp;
     97 	} */
     98 	int which = SCARG(uap, which);
     99 	struct orlimit olim;
    100 	struct rlimit lim;
    101 	int error;
    102 
    103 	error = copyin(SCARG(uap, rlp), &olim, sizeof(struct orlimit));
    104 	if (error)
    105 		return (error);
    106 	lim.rlim_cur = olim.rlim_cur;
    107 	lim.rlim_max = olim.rlim_max;
    108 	return (dosetrlimit(l, l->l_proc, which, &lim));
    109 }
    110 
    111 int
    112 kern_resource_43_init(void)
    113 {
    114 
    115 	return syscall_establish(NULL, kern_resource_43_syscalls);
    116 }
    117 
    118 int
    119 kern_resource_43_fini(void)
    120 {
    121 
    122 	return syscall_disestablish(NULL, kern_resource_43_syscalls);
    123 }
    124