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  * $DragonFly: src/lib/libkcore/kcore_proc.c,v 1.2 2007/04/29 01:36:03 dillon Exp $
  35  */
  36
  37 #include <sys/user.h>   /* MUST BE FIRST */
  38 #include <sys/param.h>
  39 #include <sys/sysctl.h>
  40
  41 #include <err.h>
  42 #include <errno.h>
  43 #include <kcore.h>
  44 #include <kvm.h>
  45 #include <nlist.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48
  49 #include "kcore_private.h"
  50
  51 int
  52 kcore_get_procs(struct kcore_data *kc, struct kinfo_proc **procs, size_t *len)
  53 {
  54         struct kinfo_proc *p;
  55         int nlen;
  56
  57         if (kc == NULL)
  58                 kc = &kcore_global;
  59
  60         p = kvm_getprocs(kc->kd, KERN_PROC_ALL, 0, &nlen);
  61         if (p == NULL) {
  62                 warnx("cannot read process table: %s", kvm_geterr(kc->kd));
  63                 return(-1);
  64         }
  65         if (nlen == 0) {
  66                 procs = NULL;
  67                 len = 0;
  68         }
  69         *procs = malloc(sizeof(struct kinfo_proc) * nlen);
  70         if (*procs == NULL)
  71                 return(ENOMEM);
  72         memcpy(*procs, p, sizeof(struct kinfo_proc) * nlen);
  73         *len = nlen;
  74         return(0);
  75 }