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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" From: @(#)gethostname.3 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD$ 34.\" 35.Dd September 23, 1994 36.Dt GETBOOTFILE 3 37.Os 38.Sh NAME 39.Nm getbootfile 40.Nd get kernel boot file name 41.Sh SYNOPSIS 42.Fd #include <paths.h> 43.Ft const char * 44.Fn getbootfile void 45.Sh DESCRIPTION 46The 47.Fn getbootfile 48function retrieves the full pathname of the file from which the 49current kernel was loaded, and returns a static pointer to the name. 50A read/write interface to this information is available via the 51.Xr sysctl 3 52MIB variable 53.Dq Li kern.bootfile . 54.Sh RETURN VALUES 55If the call succeeds a string giving the pathname is returned. If it 56fails, a a null pointer is returned and an error code is 57placed in the global location 58.Va errno . 59.Sh SEE ALSO 60.Xr sysctl 3 61.Sh BUGS 62If the boot blocks have not been modified to pass this information into 63the kernel at boot time, the static string 64.Dq Pa /kernel 65is returned instead of the real boot file. 66.Sh HISTORY 67The 68.Fn getbootfile 69function call appeared in 70.Fx 2.0 . 71