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.Dd December 5, 2023 29.Dt MEMCCPY 3 30.Os 31.Sh NAME 32.Nm memccpy 33.Nd copy string until character found 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In string.h 38.Ft void * 39.Fo memccpy 40.Fa "void * restrict dst" 41.Fa "const void * restrict src" 42.Fa "int c" 43.Fa "size_t len" 44.Fc 45.Sh DESCRIPTION 46The 47.Fn memccpy 48function 49copies bytes from string 50.Fa src 51to string 52.Fa dst . 53If the character 54.Fa c 55(as converted to an 56.Vt "unsigned char" ) 57occurs in the string 58.Fa src , 59the copy stops and a pointer to the byte after the copy of 60.Fa c 61in the string 62.Fa dst 63is returned. 64Otherwise, 65.Fa len 66bytes are copied, and a NULL pointer is returned. 67If 68.Fa src 69and 70.Fa dst 71overlap, behavior is undefined. 72.Sh SEE ALSO 73.Xr bcopy 3 , 74.Xr memcpy 3 , 75.Xr memmove 3 , 76.Xr strcpy 3 77.Sh STANDARDS 78The 79.Fn memccpy 80function conforms to 81.St -p1003.1-2004 82and 83.\" St -isoC-2024 . 84ISO/IEC 9899:2024 (\(lqISO\~C23\(rq). 85.Sh HISTORY 86The 87.Fn memccpy 88function first appeared in 89.Bx 4.4 90and was first specified in the 91.\" St -svid1 . 92System\~V Interface Definition, First Edition (\(lqSVID1\(rq). 93The 94.Ft restrict 95keyword was added to the prototype in 96.Fx 5.0.0 97in accordance with the updated specification of 98.St -p1003.1-2004 . 99