1.\" Copyright (c) 1980, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" This code is derived from software contributed to Berkeley by 5.\" the American National Standards Committee X3, on Information 6.\" Processing Systems. 7.\" 8.\" Redistribution and use in source and binary forms, with or without 9.\" modification, are permitted provided that the following conditions 10.\" are met: 11.\" 1. Redistributions of source code must retain the above copyright 12.\" notice, this list of conditions and the following disclaimer. 13.\" 2. Redistributions in binary form must reproduce the above copyright 14.\" notice, this list of conditions and the following disclaimer in the 15.\" documentation and/or other materials provided with the distribution. 16.\" 3. 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.\" @(#)malloc.3 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD$ 34.\" 35.Dd January 31, 2010 36.Dt MALLOC 3 37.Os 38.Sh NAME 39.Nm reallocf 40.Nd memory reallocation function 41.Sh LIBRARY 42.Lb libc 43.Sh SYNOPSIS 44.In stdlib.h 45.Ft void * 46.Fn reallocf "void *ptr" "size_t size" 47.Sh DESCRIPTION 48The 49.Fn reallocf 50function is identical to the 51.Fn realloc 52function, except that it 53will free the passed pointer when the requested memory cannot be allocated. 54This is a 55.Fx 56specific API designed to ease the problems with traditional coding styles 57for 58.Fn realloc 59causing memory leaks in libraries. 60.Sh RETURN VALUES 61The 62.Fn reallocf 63function returns a pointer, possibly identical to 64.Fa ptr , 65to the allocated memory 66if successful; otherwise a 67.Dv NULL 68pointer is returned, and 69.Va errno 70is set to 71.Er ENOMEM 72if the error was the result of an allocation failure. 73The 74.Fn reallocf 75function deletes the original buffer when an error occurs. 76.Sh SEE ALSO 77.Xr realloc 3 78.Sh HISTORY 79The 80.Fn reallocf 81function first appeared in 82.Fx 3.0 . 83