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.Dd January 31, 2010 33.Dt MALLOC 3 34.Os 35.Sh NAME 36.Nm reallocf 37.Nd memory reallocation function 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In stdlib.h 42.Ft void * 43.Fn reallocf "void *ptr" "size_t size" 44.Sh DESCRIPTION 45The 46.Fn reallocf 47function is identical to the 48.Fn realloc 49function, except that it 50will free the passed pointer when the requested memory cannot be allocated. 51This is a 52.Fx 53specific API designed to ease the problems with traditional coding styles 54for 55.Fn realloc 56causing memory leaks in libraries. 57.Sh RETURN VALUES 58The 59.Fn reallocf 60function returns a pointer, possibly identical to 61.Fa ptr , 62to the allocated memory 63if successful; otherwise a 64.Dv NULL 65pointer is returned, and 66.Va errno 67is set to 68.Er ENOMEM 69if the error was the result of an allocation failure. 70The 71.Fn reallocf 72function deletes the original buffer when an error occurs. 73.Sh SEE ALSO 74.Xr realloc 3 75.Sh HISTORY 76The 77.Fn reallocf 78function first appeared in 79.Fx 3.0 . 80