lib/libkcore/kcore_proc.c

   1 /*
   2  * Copyright (c) 2004 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Joerg Sonnenberger <joerg@bec.de>.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in
  15  *    the documentation and/or other materials provided with the
  16  *    distribution.
  17  * 3. Neither the name of The DragonFly Project nor the names of its
  18  *    contributors may be used to endorse or promote products derived
  19  *    from this software without specific, prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  24  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  25  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  27  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  28  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  29  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  30  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  31  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/param.h>
  36 #include <sys/sysctl.h>
  37
  38 #include <err.h>
  39 #include <errno.h>
  40 #include <kcore.h>
  41 #include <kvm.h>
  42 #include <nlist.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45
  46 #include "kcore_private.h"
  47
  48 int
  49 kcore_get_procs(struct kcore_data *kc, struct kinfo_proc **procs, size_t *len)
  50 {
  51         struct kinfo_proc *p;
  52         int nlen;
  53
  54         if (kc == NULL)
  55                 kc = &kcore_global;
  56
  57         p = kvm_getprocs(kc->kd, KERN_PROC_ALL, 0, &nlen);
  58         if (p == NULL) {
  59                 warnx("cannot read process table: %s", kvm_geterr(kc->kd));
  60                 return(-1);
  61         }
  62         if (nlen == 0) {
  63                 procs = NULL;
  64                 len = NULL;
  65         }
  66         *procs = malloc(sizeof(struct kinfo_proc) * nlen);
  67         if (*procs == NULL)
  68                 return(ENOMEM);
  69         memcpy(*procs, p, sizeof(struct kinfo_proc) * nlen);
  70         *len = nlen;
  71         return(0);
  72 }