1.\" $OpenBSD: strcat.3,v 1.18 2016/05/26 21:30:13 millert Exp $ 2.\" 3.\" Copyright (c) 1990, 1991 The Regents of the University of California. 4.\" All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" Chris Torek and the American National Standards Committee X3, 8.\" on Information Processing Systems. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 3. Neither the name of the University nor the names of its contributors 19.\" may be used to endorse or promote products derived from this software 20.\" without specific prior written permission. 21.\" 22.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32.\" SUCH DAMAGE. 33.\" 34.Dd $Mdocdate: May 26 2016 $ 35.Dt STRCAT 3 36.Os 37.Sh NAME 38.Nm strcat 39.Nd concatenate two strings without bounds checking 40.Sh SYNOPSIS 41.In string.h 42.Ft char * 43.Fn strcat "char *dst" "const char *append" 44.Sh DESCRIPTION 45The 46.Fn strcat 47function appends a copy of the NUL-terminated string 48.Fa append 49to the end of the NUL-terminated string 50.Fa dst , 51then adds a terminating 52.Ql \e0 . 53.Pp 54No bounds checking is performed. 55If the buffer 56.Fa dst 57is not large enough to hold the result, 58subsequent memory will be damaged. 59.Sh RETURN VALUES 60The 61.Fn strcat 62function return the pointer 63.Fa dst . 64.Sh SEE ALSO 65.Xr strlcpy 3 , 66.Xr wcscat 3 , 67.Xr wcslcpy 3 68.Sh STANDARDS 69The 70.Fn strcat 71function conforms to 72.St -ansiC . 73.Sh HISTORY 74The 75.Fn strcat 76function first appeared in the Programmer's Workbench (PWB/UNIX) 77and was ported to 78.At v7 . 79