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NetBSD/sys/compat/svr4/svr4_resource.c
bouyer 52497e180a Remplace kern.shortcorename sysctl with a more flexible sheme, 
core filename format, which allow to change the name of the core dump,
and to relocate it in a directory. Credits to Bill Sommerfeld for giving me
the idea :)
The default core filename format can be changed by options DEFCORENAME and/or
kern.defcorename
Create a new sysctl tree, proc, which holds per-process values (for now
the corename format, and resources limits). Process is designed by its pid
at the second level name. These values are inherited on fork, and the corename
fomat is reset to defcorename on suid/sgid exec.
Create a p_sugid() function, to take appropriate actions on suid/sgid
exec (for now set the P_SUGID flag and reset the per-proc corename).
Adjust dosetrlimit() to allow changing limits of one proc by another, with
credential controls.
1999-09-28 14:47:00 +00:00

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/* $NetBSD: svr4_resource.c,v 1.5 1999/09/28 14:47:02 bouyer Exp $ */
/*-
* Copyright (c) 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* 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 the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``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 FOUNDATION OR CONTRIBUTORS
* 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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>
#include <sys/file.h>
#include <sys/resource.h>
#include <sys/resourcevar.h>
#include <compat/svr4/svr4_types.h>
#include <compat/svr4/svr4_resource.h>
#include <compat/svr4/svr4_signal.h>
#include <compat/svr4/svr4_lwp.h>
#include <compat/svr4/svr4_ucontext.h>
#include <compat/svr4/svr4_syscallargs.h>
#include <compat/svr4/svr4_util.h>
static __inline int svr4_to_native_rl __P((int));
static __inline int
svr4_to_native_rl(rl)
int rl;
{
switch (rl) {
case SVR4_RLIMIT_CPU:
return RLIMIT_CPU;
case SVR4_RLIMIT_FSIZE:
return RLIMIT_FSIZE;
case SVR4_RLIMIT_DATA:
return RLIMIT_DATA;
case SVR4_RLIMIT_STACK:
return RLIMIT_STACK;
case SVR4_RLIMIT_CORE:
return RLIMIT_CORE;
case SVR4_RLIMIT_NOFILE:
return RLIMIT_NOFILE;
case SVR4_RLIMIT_VMEM:
return RLIMIT_RSS;
default:
return -1;
}
}
/*
* Check if the resource limit fits within the BSD range and it is not
* one of the magic SVR4 limit values
*/
#define OKLIMIT(l) (((int32_t)(l)) >= 0 && ((int32_t)(l)) < 0x7fffffff && \
((svr4_rlim_t)(l)) != SVR4_RLIM_INFINITY && \
((svr4_rlim_t)(l)) != SVR4_RLIM_SAVED_CUR && \
((svr4_rlim_t)(l)) != SVR4_RLIM_SAVED_MAX)
#define OKLIMIT64(l) (((rlim_t)(l)) >= 0 && ((rlim_t)(l)) < RLIM_INFINITY && \
((svr4_rlim64_t)(l)) != SVR4_RLIM64_INFINITY && \
((svr4_rlim64_t)(l)) != SVR4_RLIM64_SAVED_CUR && \
((svr4_rlim64_t)(l)) != SVR4_RLIM64_SAVED_MAX)
int
svr4_sys_getrlimit(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_getrlimit_args *uap = v;
int rl = svr4_to_native_rl(SCARG(uap, which));
struct rlimit blim;
struct svr4_rlimit slim;
if (rl == -1)
return EINVAL;
blim = p->p_rlimit[rl];
/*
* Our infinity, is their maxfiles.
*/
if (rl == RLIMIT_NOFILE && blim.rlim_max == RLIM_INFINITY)
blim.rlim_max = maxfiles;
/*
* If the limit can be be represented, it is returned.
* Otherwise, if rlim_cur == rlim_max, return RLIM_SAVED_MAX
* else return RLIM_SAVED_CUR
*/
if (blim.rlim_max == RLIM_INFINITY)
slim.rlim_max = SVR4_RLIM_INFINITY;
else if (OKLIMIT(blim.rlim_max))
slim.rlim_max = (svr4_rlim_t) blim.rlim_max;
else
slim.rlim_max = SVR4_RLIM_SAVED_MAX;
if (blim.rlim_cur == RLIM_INFINITY)
slim.rlim_cur = SVR4_RLIM_INFINITY;
else if (OKLIMIT(blim.rlim_cur))
slim.rlim_cur = (svr4_rlim_t) blim.rlim_cur;
else if (blim.rlim_max == blim.rlim_cur)
slim.rlim_cur = SVR4_RLIM_SAVED_MAX;
else
slim.rlim_cur = SVR4_RLIM_SAVED_CUR;
return copyout(&slim, SCARG(uap, rlp), sizeof(*SCARG(uap, rlp)));
}
int
svr4_sys_setrlimit(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_setrlimit_args *uap = v;
int rl = svr4_to_native_rl(SCARG(uap, which));
struct rlimit blim, *limp;
struct svr4_rlimit slim;
int error;
if (rl == -1)
return EINVAL;
limp = &p->p_rlimit[rl];
if ((error = copyin(SCARG(uap, rlp), &slim, sizeof(slim))) != 0)
return error;
/*
* if the limit is SVR4_RLIM_INFINITY, then we set it to our
* unlimited.
* We should also: If it is SVR4_RLIM_SAVED_MAX, we should set the
* new limit to the corresponding saved hard limit, and if
* it is equal to SVR4_RLIM_SAVED_CUR, we should set it to the
* corresponding saved soft limit.
*
*/
if (slim.rlim_max == SVR4_RLIM_INFINITY)
blim.rlim_max = RLIM_INFINITY;
else if (OKLIMIT(slim.rlim_max))
blim.rlim_max = (rlim_t) slim.rlim_max;
else if (slim.rlim_max == SVR4_RLIM_SAVED_MAX)
blim.rlim_max = limp->rlim_max;
else if (slim.rlim_max == SVR4_RLIM_SAVED_CUR)
blim.rlim_max = limp->rlim_cur;
if (slim.rlim_cur == SVR4_RLIM_INFINITY)
blim.rlim_cur = RLIM_INFINITY;
else if (OKLIMIT(slim.rlim_cur))
blim.rlim_cur = (rlim_t) slim.rlim_cur;
else if (slim.rlim_cur == SVR4_RLIM_SAVED_MAX)
blim.rlim_cur = limp->rlim_max;
else if (slim.rlim_cur == SVR4_RLIM_SAVED_CUR)
blim.rlim_cur = limp->rlim_cur;
return dosetrlimit(p, p->p_cred, rl, &blim);
}
int
svr4_sys_getrlimit64(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_getrlimit64_args *uap = v;
int rl = svr4_to_native_rl(SCARG(uap, which));
struct rlimit blim;
struct svr4_rlimit64 slim;
if (rl == -1)
return EINVAL;
blim = p->p_rlimit[rl];
/*
* Our infinity, is their maxfiles.
*/
if (rl == RLIMIT_NOFILE && blim.rlim_max == RLIM_INFINITY)
blim.rlim_max = maxfiles;
/*
* If the limit can be be represented, it is returned.
* Otherwise, if rlim_cur == rlim_max, return SVR4_RLIM_SAVED_MAX
* else return SVR4_RLIM_SAVED_CUR
*/
if (blim.rlim_max == RLIM_INFINITY)
slim.rlim_max = SVR4_RLIM64_INFINITY;
else if (OKLIMIT64(blim.rlim_max))
slim.rlim_max = (svr4_rlim64_t) blim.rlim_max;
else
slim.rlim_max = SVR4_RLIM64_SAVED_MAX;
if (blim.rlim_cur == RLIM_INFINITY)
slim.rlim_cur = SVR4_RLIM64_INFINITY;
else if (OKLIMIT64(blim.rlim_cur))
slim.rlim_cur = (svr4_rlim64_t) blim.rlim_cur;
else if (blim.rlim_max == blim.rlim_cur)
slim.rlim_cur = SVR4_RLIM64_SAVED_MAX;
else
slim.rlim_cur = SVR4_RLIM64_SAVED_CUR;
return copyout(&slim, SCARG(uap, rlp), sizeof(*SCARG(uap, rlp)));
}
int
svr4_sys_setrlimit64(p, v, retval)
register struct proc *p;
void *v;
register_t *retval;
{
struct svr4_sys_setrlimit64_args *uap = v;
int rl = svr4_to_native_rl(SCARG(uap, which));
struct rlimit blim, *limp;
struct svr4_rlimit64 slim;
int error;
if (rl == -1)
return EINVAL;
limp = &p->p_rlimit[rl];
if ((error = copyin(SCARG(uap, rlp), &slim, sizeof(slim))) != 0)
return error;
/*
* if the limit is SVR4_RLIM64_INFINITY, then we set it to our
* unlimited.
* We should also: If it is SVR4_RLIM64_SAVED_MAX, we should set the
* new limit to the corresponding saved hard limit, and if
* it is equal to SVR4_RLIM64_SAVED_CUR, we should set it to the
* corresponding saved soft limit.
*
*/
if (slim.rlim_max == SVR4_RLIM64_INFINITY)
blim.rlim_max = RLIM_INFINITY;
else if (OKLIMIT64(slim.rlim_max))
blim.rlim_max = (rlim_t) slim.rlim_max;
else if (slim.rlim_max == SVR4_RLIM64_SAVED_MAX)
blim.rlim_max = limp->rlim_max;
else if (slim.rlim_max == SVR4_RLIM64_SAVED_CUR)
blim.rlim_max = limp->rlim_cur;
if (slim.rlim_cur == SVR4_RLIM64_INFINITY)
blim.rlim_cur = RLIM_INFINITY;
else if (OKLIMIT64(slim.rlim_cur))
blim.rlim_cur = (rlim_t) slim.rlim_cur;
else if (slim.rlim_cur == SVR4_RLIM64_SAVED_MAX)
blim.rlim_cur = limp->rlim_max;
else if (slim.rlim_cur == SVR4_RLIM64_SAVED_CUR)
blim.rlim_cur = limp->rlim_cur;
return dosetrlimit(p, p->p_cred, rl, &blim);
}
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