FreeBSD/Linux Kernel Cross Reference
sys/compat/svr4/svr4_resource.c

     /*      Derived from:
      *      $NetBSD: svr4_resource.c,v 1.3 1998/12/13 18:00:52 christos Exp $
      */
     
     /*-
      * Original copyright:
      *
      * 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.
     * 
     * $FreeBSD: releng/5.0/sys/compat/svr4/svr4_resource.c 108086 2002-12-19 09:40:13Z alfred $
     */
    
    /*
     * Portions of this software have been derived from software contributed
     * to the FreeBSD Project by Mark Newton.
     *
     * Copyright (c) 1999 Mark Newton
     * 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. 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.
     */
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/file.h>
    #include <sys/lock.h>
    #include <sys/mutex.h>
    #include <sys/proc.h>
    #include <sys/resource.h>
    #include <sys/resourcevar.h>
    
    #include <compat/svr4/svr4.h>
    #include <compat/svr4/svr4_types.h>
    #include <compat/svr4/svr4_resource.h>
    #include <compat/svr4/svr4_signal.h>
    #include <compat/svr4/svr4_proto.h>
    #include <compat/svr4/svr4_util.h>
    
    static __inline int svr4_to_native_rl(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_VMEM;
           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(td, uap)
           register struct thread *td;
           struct svr4_sys_getrlimit_args *uap;
   {
           int rl = svr4_to_native_rl(uap->which);
           struct rlimit blim;
           struct svr4_rlimit slim;
   
           if (rl == -1)
                   return EINVAL;
   
           /* For p_rlimit. */
           mtx_assert(&Giant, MA_OWNED);
           blim = td->td_proc->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, uap->rlp, sizeof(*uap->rlp));
   }
   
   
   int
   svr4_sys_setrlimit(td, uap)
           register struct thread *td;
           struct svr4_sys_setrlimit_args *uap;
   {
           int rl = svr4_to_native_rl(uap->which);
           struct rlimit blim, *limp;
           struct svr4_rlimit slim;
           int error;
   
           if (rl == -1)
                   return EINVAL;
   
           /* For p_rlimit. */
           mtx_assert(&Giant, MA_OWNED);
           limp = &td->td_proc->p_rlimit[rl];
   
           if ((error = copyin(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(td, rl, &blim);
   }
   
   
   int
   svr4_sys_getrlimit64(td, uap)
           register struct thread *td;
           struct svr4_sys_getrlimit64_args *uap;
   {
           int rl = svr4_to_native_rl(uap->which);
           struct rlimit blim;
           struct svr4_rlimit64 slim;
   
           if (rl == -1)
                   return EINVAL;
   
           /* For p_rlimit. */
           mtx_assert(&Giant, MA_OWNED);
           blim = td->td_proc->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, uap->rlp, sizeof(*uap->rlp));
   }
   
   
   int
   svr4_sys_setrlimit64(td, uap)
           register struct thread *td;
           struct svr4_sys_setrlimit64_args *uap;
   {
           int rl = svr4_to_native_rl(uap->which);
           struct rlimit blim, *limp;
           struct svr4_rlimit64 slim;
           int error;
   
           if (rl == -1)
                   return EINVAL;
   
           /* For p_rlimit. */
           mtx_assert(&Giant, MA_OWNED);
           limp = &td->td_proc->p_rlimit[rl];
   
           if ((error = copyin(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(td, rl, &blim);
   }

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