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+++ Libc/Libc-262/gen/getbootfile.3
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+.\" Copyright (c) 1983, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
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+.\" 4. Neither the name of the University nor the names of its contributors
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+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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+.\"     From: @(#)gethostname.3	8.1 (Berkeley) 6/4/93
+.\" $FreeBSD: src/lib/libc/gen/getbootfile.3,v 1.9 2001/10/01 16:08:50 ru Exp $
+.\"
+.Dd September 23, 1994
+.Dt GETBOOTFILE 3
+.Os
+.Sh NAME
+.Nm getbootfile
+.Nd get kernel boot file name
+.Sh LIBRARY
+.Lb libc
+.Sh SYNOPSIS
+.In paths.h
+.Ft const char *
+.Fn getbootfile void
+.Sh DESCRIPTION
+The
+.Fn getbootfile
+function retrieves the full pathname of the file from which the
+current kernel was loaded, and returns a static pointer to the name.
+A read/write interface to this information is available via the
+.Xr sysctl 3
+MIB variable
+.Dq Li kern.bootfile .
+.Sh RETURN VALUES
+If the call succeeds a string giving the pathname is returned.  If it
+fails, a null pointer is returned and an error code is
+placed in the global location
+.Va errno .
+.Sh SEE ALSO
+.Xr sysctl 3
+.Sh BUGS
+If the boot blocks have not been modified to pass this information into
+the kernel at boot time, the static string
+.Dq Pa /kernel
+is returned instead of the real boot file.
+.Sh HISTORY
+The
+.Fn getbootfile
+function call appeared in
+.Fx 2.0 .