lib/libspl/os/freebsd/getexecname.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or https://opensource.org/licenses/CDDL-1.0.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22
  23 #include <stdint.h>
  24 #include <limits.h>
  25 #include <sys/param.h>
  26 #include <sys/sysctl.h>
  27 #include <sys/types.h>
  28 #include "../../libspl_impl.h"
  29
  30 __attribute__((visibility("hidden"))) ssize_t
  31 getexecname_impl(char *execname)
  32 {
  33         size_t len = PATH_MAX;
  34         int name[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};
  35
  36         if (sysctl(name, nitems(name), execname, &len, NULL, 0) != 0)
  37                 return (-1);
  38
  39         return (len);
  40 }