The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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

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