zfs/lib/libspl/os/freebsd/getexecname.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or https://opensource.org/licenses/CDDL-1.0.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

#include <stdint.h>
#include <limits.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include "../../libspl_impl.h"

__attribute__((visibility("hidden"))) ssize_t
getexecname_impl(char *execname)
{
	size_t len = PATH_MAX;
	int name[4] = {CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1};

	if (sysctl(name, nitems(name), execname, &len, NULL, 0) != 0)
		return (-1);

	return (len);
}