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.Dd September 23, 1994 29.Dt GETBOOTFILE 3 30.Os 31.Sh NAME 32.Nm getbootfile 33.Nd get kernel boot file name 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In paths.h 38.Ft const char * 39.Fn getbootfile void 40.Sh DESCRIPTION 41The 42.Fn getbootfile 43function retrieves the full pathname of the file from which the 44current kernel was loaded, and returns a static pointer to the name. 45A read/write interface to this information is available via the 46.Xr sysctl 3 47MIB variable 48.Dq Li kern.bootfile . 49.Sh RETURN VALUES 50If the call succeeds a string giving the pathname is returned. 51If it 52fails, a null pointer is returned and an error code is 53placed in the global location 54.Va errno . 55.Sh SEE ALSO 56.Xr sysctl 3 57.Sh HISTORY 58The 59.Fn getbootfile 60function appeared in 61.Fx 2.0 . 62.Sh BUGS 63If the boot blocks have not been modified to pass this information into 64the kernel at boot time, the static string 65.Dq Pa /boot/kernel/kernel 66is returned instead of the real boot file. 67