1.\" $OpenBSD: strrchr.3,v 1.11 2015/11/24 09:14:35 daniel 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: November 24 2015 $ 35.Dt STRRCHR 3 36.Os 37.Sh NAME 38.Nm strrchr , 39.Nm rindex 40.Nd locate last occurrence of a character in a string 41.Sh SYNOPSIS 42.In string.h 43.Ft char * 44.Fn strrchr "const char *s" "int c" 45.In strings.h 46.Ft char * 47.Fn rindex "const char *s" "int c" 48.Sh DESCRIPTION 49The 50.Fn strrchr 51function locates the last occurrence of the character 52.Fa c 53in the string 54.Fa s . 55The terminating 56.Tn NUL 57character is considered part of the string. 58If 59.Fa c 60is 61.Ql \e0 , 62.Fn strrchr 63locates the terminating 64.Ql \e0 . 65.Pp 66The 67.Fn rindex 68function is an old synonym for 69.Fn strrchr . 70.Sh RETURN VALUES 71The 72.Fn strrchr 73function returns a pointer to the located character or 74.Dv NULL 75if the character does not appear in the string. 76.Sh EXAMPLES 77After the following call to 78.Fn strrchr , 79.Va p 80will point to the string 81.Qq obar : 82.Bd -literal -offset indent 83char *p; 84char *s = "foobar"; 85 86p = strrchr(s, 'o'); 87.Ed 88.Sh SEE ALSO 89.Xr memchr 3 , 90.Xr strchr 3 , 91.Xr strcspn 3 , 92.Xr strpbrk 3 , 93.Xr strsep 3 , 94.Xr strspn 3 , 95.Xr strstr 3 , 96.Xr strtok 3 , 97.Xr wcsrchr 3 98.Sh STANDARDS 99The 100.Fn strrchr 101function conforms to 102.St -ansiC . 103.Pp 104The 105.Fn rindex 106function is deprecated and shouldn't be used in new code. 107.Sh HISTORY 108The 109.Fn rindex 110function first appeared in 111.At v7 . 112The 113.Fn strrchr 114function first appeared in 115.At III 116and was reimplemented for 117.Bx 4.3 Tahoe . 118