.\"	$OpenBSD: strrchr.3,v 1.12 2018/10/01 06:37:37 martijn Exp $
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.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek and the American National Standards Committee X3,
.\" on Information Processing Systems.
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.Dd $Mdocdate: October 1 2018 $
.Dt STRRCHR 3
.Os
.Sh NAME
.Nm strrchr ,
.Nm rindex
.Nd locate last occurrence of a character in a string
.Sh SYNOPSIS
.In string.h
.Ft char *
.Fn strrchr "const char *s" "int c"
.In strings.h
.Ft char *
.Fn rindex "const char *s" "int c"
.Sh DESCRIPTION
The
.Fn strrchr
function locates the last occurrence of the character
.Fa c
.Pq converted to a char
in the string
.Fa s .
The terminating
.Tn NUL
character is considered part of the string.
If
.Fa c
is
.Ql \e0 ,
.Fn strrchr
locates the terminating
.Ql \e0 .
.Pp
The
.Fn rindex
function is an old synonym for
.Fn strrchr .
.Sh RETURN VALUES
The
.Fn strrchr
function returns a pointer to the located character or
.Dv NULL
if the character does not appear in the string.
.Sh EXAMPLES
After the following call to
.Fn strrchr ,
.Va p
will point to the string
.Qq obar :
.Bd -literal -offset indent
char *p;
char *s = "foobar";

p = strrchr(s, 'o');
.Ed
.Sh SEE ALSO
.Xr memchr 3 ,
.Xr strchr 3 ,
.Xr strcspn 3 ,
.Xr strpbrk 3 ,
.Xr strsep 3 ,
.Xr strspn 3 ,
.Xr strstr 3 ,
.Xr strtok 3 ,
.Xr wcsrchr 3
.Sh STANDARDS
The
.Fn strrchr
function conforms to
.St -ansiC .
.Pp
The
.Fn rindex
function is deprecated and shouldn't be used in new code.
.Sh HISTORY
The
.Fn rindex
function first appeared in
.At v7 .
The
.Fn strrchr
function first appeared in
.At III
and was reimplemented for
.Bx 4.3 Tahoe .