procfs_rlimit.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 1999 Adrian Chadd
    5  * Copyright (c) 1993
    6  *      The Regents of the University of California.  All rights reserved.
    7  *
    8  * This code is derived from software contributed to Berkeley by
    9  * Jan-Simon Pendry.
   10  *
   11  * Redistribution and use in source and binary forms, with or without
   12  * modification, are permitted provided that the following conditions
   13  * are met:
   14  * 1. Redistributions of source code must retain the above copyright
   15  *    notice, this list of conditions and the following disclaimer.
   16  * 2. Redistributions in binary form must reproduce the above copyright
   17  *    notice, this list of conditions and the following disclaimer in the
   18  *    documentation and/or other materials provided with the distribution.
   19  * 3. All advertising materials mentioning features or use of this software
   20  *    must display the following acknowledgement:
   21  *      This product includes software developed by the University of
   22  *      California, Berkeley and its contributors.
   23  * 4. Neither the name of the University nor the names of its contributors
   24  *    may be used to endorse or promote products derived from this software
   25  *    without specific prior written permission.
   26  *
   27  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   28  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   29  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   30  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   31  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   32  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   33  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   34  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   35  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   36  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   37  * SUCH DAMAGE.
   38  *
   39  *      @(#)procfs_status.c     8.4 (Berkeley) 6/15/94
   40  *
   41  * $FreeBSD$
   42  */
   43 
   44 /*
   45  * To get resource.h to include our rlimit_ident[] array of rlimit identifiers
   46  */
   47 
   48 #define _RLIMIT_IDENT
   49 
   50 #include <sys/param.h>
   51 #include <sys/lock.h>
   52 #include <sys/mutex.h>
   53 #include <sys/systm.h>
   54 #include <sys/proc.h>
   55 #include <sys/resourcevar.h>
   56 #include <sys/resource.h>
   57 #include <sys/sbuf.h>
   58 #include <sys/types.h>
   59 #include <sys/malloc.h>
   60 
   61 #include <fs/pseudofs/pseudofs.h>
   62 #include <fs/procfs/procfs.h>
   63 
   64 
   65 int
   66 procfs_doprocrlimit(PFS_FILL_ARGS)
   67 {
   68         struct plimit *limp;
   69         int i;
   70 
   71         /*
   72          * Obtain a private reference to resource limits
   73          */
   74 
   75         PROC_LOCK(p);
   76         limp = lim_hold(p->p_limit);
   77         PROC_UNLOCK(p);
   78 
   79         for (i = 0; i < RLIM_NLIMITS; i++) {
   80 
   81                 /*
   82                  * Add the rlimit ident
   83                  */
   84 
   85                 sbuf_printf(sb, "%s ", rlimit_ident[i]);
   86 
   87                 /*
   88                  * Replace RLIM_INFINITY with -1 in the string
   89                  */
   90 
   91                 /*
   92                  * current limit
   93                  */
   94 
   95                 if (limp->pl_rlimit[i].rlim_cur == RLIM_INFINITY) {
   96                         sbuf_printf(sb, "-1 ");
   97                 } else {
   98                         sbuf_printf(sb, "%llu ",
   99                             (unsigned long long)limp->pl_rlimit[i].rlim_cur);
  100                 }
  101 
  102                 /*
  103                  * maximum limit
  104                  */
  105 
  106                 if (limp->pl_rlimit[i].rlim_max == RLIM_INFINITY) {
  107                         sbuf_printf(sb, "-1\n");
  108                 } else {
  109                         sbuf_printf(sb, "%llu\n",
  110                             (unsigned long long)limp->pl_rlimit[i].rlim_max);
  111                 }
  112         }
  113 
  114         lim_free(limp);
  115         return (0);
  116 }

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FreeBSD/Linux Kernel Cross Reference sys/fs/procfs/procfs_rlimit.c

FreeBSD/Linux Kernel Cross Reference
sys/fs/procfs/procfs_rlimit.c