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.\" 34.Dd January 31, 2010 35.Dt MALLOC 3 36.Os 37.Sh NAME 38.Nm reallocf 39.Nd memory reallocation function 40.Sh LIBRARY 41.Lb libc 42.Sh SYNOPSIS 43.In stdlib.h 44.Ft void * 45.Fn reallocf "void *ptr" "size_t size" 46.Sh DESCRIPTION 47The 48.Fn reallocf 49function is identical to the 50.Fn realloc 51function, except that it 52will free the passed pointer when the requested memory cannot be allocated. 53This is a 54.Fx 55specific API designed to ease the problems with traditional coding styles 56for 57.Fn realloc 58causing memory leaks in libraries. 59.Sh RETURN VALUES 60The 61.Fn reallocf 62function returns a pointer, possibly identical to 63.Fa ptr , 64to the allocated memory 65if successful; otherwise a 66.Dv NULL 67pointer is returned, and 68.Va errno 69is set to 70.Er ENOMEM 71if the error was the result of an allocation failure. 72The 73.Fn reallocf 74function deletes the original buffer when an error occurs. 75.Sh SEE ALSO 76.Xr realloc 3 77.Sh HISTORY 78The 79.Fn reallocf 80function first appeared in 81.Fx 3.0 . 82