1.\" Copyright (c) 1990, 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.\" Chris Torek and the American National Standards Committee X3, 6.\" on Information 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. All advertising materials mentioning features or use of this software 17.\" must display the following acknowledgement: 18.\" This product includes software developed by the University of 19.\" California, Berkeley and its contributors. 20.\" 4. Neither the name of the University nor the names of its contributors 21.\" may be used to endorse or promote products derived from this software 22.\" without specific prior written permission. 23.\" 24.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34.\" SUCH DAMAGE. 35.\" 36.\" @(#)strcat.3 8.1 (Berkeley) 6/4/93 37.\" $FreeBSD: src/lib/libc/string/strcat.3,v 1.5.2.3 2001/12/14 18:33:59 ru Exp $ 38.\" $DragonFly: src/lib/libc/string/strcat.3,v 1.3 2007/10/19 20:46:53 swildner Exp $ 39.\" 40.Dd June 4, 1993 41.Dt STRCAT 3 42.Os 43.Sh NAME 44.Nm strcat , 45.Nm strncat 46.Nd concatenate strings 47.Sh LIBRARY 48.Lb libc 49.Sh SYNOPSIS 50.In string.h 51.Ft char * 52.Fn strcat "char *s" "const char *append" 53.Ft char * 54.Fn strncat "char *s" "const char *append" "size_t count" 55.Sh DESCRIPTION 56The 57.Fn strcat 58and 59.Fn strncat 60functions 61append a copy of the null-terminated string 62.Fa append 63to the end of the null-terminated string 64.Fa s , 65then add a terminating 66.Ql \e0 . 67The string 68.Fa s 69must have sufficient space to hold the result. 70.Pp 71The 72.Fn strncat 73function 74appends not more than 75.Fa count 76characters from 77.Fa append , 78and then adds a terminating 79.Ql \e0 . 80.Sh RETURN VALUES 81The 82.Fn strcat 83and 84.Fn strncat 85functions 86return the pointer 87.Fa s . 88.Sh SEE ALSO 89.Xr bcopy 3 , 90.Xr memccpy 3 , 91.Xr memcpy 3 , 92.Xr memmove 3 , 93.Xr strcpy 3 , 94.Xr strlcat 3 , 95.Xr strlcpy 3 96.Sh STANDARDS 97The 98.Fn strcat 99and 100.Fn strncat 101functions 102conform to 103.St -isoC . 104