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+.\" Copyright (c) 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the American National Standards Committee X3, on Information
+.\" Processing Systems.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)free.3	8.1 (Berkeley) 6/4/93
+.\"
+.Dd June 4, 1993
+.Dt FREE 3
+.Os
+.Sh NAME
+.Nm free
+.Nd free up memory allocated with malloc, calloc or realloc
+.Sh SYNOPSIS
+.Fd #include <stdlib.h>
+.Ft void
+.Fn free "void *ptr"
+.Sh DESCRIPTION
+The
+.Fn free
+function causes the space pointed to by
+.Fa ptr
+to be deallocated, that is, made available
+for further allocation.
+If
+.Fa ptr
+is a null pointer, no action occurs.
+Otherwise, if the argument does not match a pointer earlier
+returned by the
+.Xr calloc ,
+.Xr malloc ,
+or
+.Xr realloc
+function, or if the space has been deallocated by a call to
+.Fn free
+or
+.Xr realloc ,
+general havoc may occur.
+.Sh RETURN VALUES
+The
+.Fn free
+function returns no value.
+.Sh SEE ALSO
+.Xr calloc 3 ,
+.Xr malloc 3 ,
+.Xr realloc 3
+.Sh STANDARDS
+The
+.Fn free
+function conforms to
+.St -ansiC .