1.\" Copyright (c) 1990, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)memccpy.3 8.1 (Berkeley) 6/9/93 29.\" 30.Dd December 5, 2023 31.Dt MEMCCPY 3 32.Os 33.Sh NAME 34.Nm memccpy 35.Nd copy string until character found 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In string.h 40.Ft void * 41.Fo memccpy 42.Fa "void * restrict dst" 43.Fa "const void * restrict src" 44.Fa "int c" 45.Fa "size_t len" 46.Fc 47.Sh DESCRIPTION 48The 49.Fn memccpy 50function 51copies bytes from string 52.Fa src 53to string 54.Fa dst . 55If the character 56.Fa c 57(as converted to an 58.Vt "unsigned char" ) 59occurs in the string 60.Fa src , 61the copy stops and a pointer to the byte after the copy of 62.Fa c 63in the string 64.Fa dst 65is returned. 66Otherwise, 67.Fa len 68bytes are copied, and a NULL pointer is returned. 69If 70.Fa src 71and 72.Fa dst 73overlap, behavior is undefined. 74.Sh SEE ALSO 75.Xr bcopy 3 , 76.Xr memcpy 3 , 77.Xr memmove 3 , 78.Xr strcpy 3 79.Sh STANDARDS 80The 81.Fn memccpy 82function conforms to 83.St -p1003.1-2004 84and 85.\" St -isoC-2024 . 86ISO/IEC 9899:2024 (\(lqISO\~C23\(rq). 87.Sh HISTORY 88The 89.Fn memccpy 90function first appeared in 91.Bx 4.4 92and was first specified in the 93.\" St -svid1 . 94System\~V Interface Definition, First Edition (\(lqSVID1\(rq). 95The 96.Ft restrict 97keyword was added to the prototype in 98.Fx 5.0.0 99in accordance with the updated specification of 100.St -p1003.1-2004 . 101