1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" From: @(#)gethostname.3 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD$ 30.\" 31.Dd September 23, 1994 32.Dt GETBOOTFILE 3 33.Os 34.Sh NAME 35.Nm getbootfile 36.Nd get kernel boot file name 37.Sh LIBRARY 38.Lb libc 39.Sh SYNOPSIS 40.In paths.h 41.Ft const char * 42.Fn getbootfile void 43.Sh DESCRIPTION 44The 45.Fn getbootfile 46function retrieves the full pathname of the file from which the 47current kernel was loaded, and returns a static pointer to the name. 48A read/write interface to this information is available via the 49.Xr sysctl 3 50MIB variable 51.Dq Li kern.bootfile . 52.Sh RETURN VALUES 53If the call succeeds a string giving the pathname is returned. 54If it 55fails, a null pointer is returned and an error code is 56placed in the global location 57.Va errno . 58.Sh SEE ALSO 59.Xr sysctl 3 60.Sh HISTORY 61The 62.Fn getbootfile 63function appeared in 64.Fx 2.0 . 65.Sh BUGS 66If the boot blocks have not been modified to pass this information into 67the kernel at boot time, the static string 68.Dq Pa /boot/kernel/kernel 69is returned instead of the real boot file. 70