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-.\"     $OpenBSD: strchr.3,v 1.14 2024/12/11 23:28:20 jsg Exp $
-.\"
-.\" Copyright (c) 1990, 1991 The Regents of the University of California.
-.\" All rights reserved.
-.\"
-.\" This code is derived from software contributed to Berkeley by
-.\" Chris Torek and the American National Standards Committee X3,
-.\" on Information Processing Systems.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\"    notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\"    notice, this list of conditions and the following disclaimer in the
-.\"    documentation and/or other materials provided with the distribution.
-.\" 3. Neither the name of the University nor the names of its contributors
-.\"    may be used to endorse or promote products derived from this software
-.\"    without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.Dd $Mdocdate: December 11 2024 $
-.Dt STRCHR 3
-.Os
-.Sh NAME
-.Nm strchr ,
-.Nm index
-.Nd locate first occurrence of a character in a string
-.Sh SYNOPSIS
-.In string.h
-.Ft char *
-.Fn strchr "const char *s" "int c"
-.In strings.h
-.Ft char *
-.Fn index "const char *s" "int c"
-.Sh DESCRIPTION
-The
-.Fn strchr
-function locates the first occurrence of the character
-.Fa c
-.Pq converted to a char
-in the string
-.Fa s .
-The terminating NUL character is considered part of the string.
-If
-.Fa c
-is
-.Ql \e0 ,
-.Fn strchr
-locates the terminating
-.Ql \e0 .
-.Pp
-The
-.Fn index
-function is an old synonym for
-.Fn strchr .
-.Sh RETURN VALUES
-The
-.Fn strchr
-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 strchr ,
-.Va p
-will point to the string
-.Qq oobar :
-.Bd -literal -offset indent
-char *p;
-char *s = "foobar";
-
-p = strchr(s, 'o');
-.Ed
-.Sh SEE ALSO
-.Xr memchr 3 ,
-.Xr strcspn 3 ,
-.Xr strpbrk 3 ,
-.Xr strrchr 3 ,
-.Xr strsep 3 ,
-.Xr strspn 3 ,
-.Xr strstr 3 ,
-.Xr strtok 3 ,
-.Xr wcschr 3
-.Sh STANDARDS
-The
-.Fn strchr
-function conforms to
-.St -ansiC .
-.Pp
-The
-.Fn index
-function is deprecated and shouldn't be used in new code.
-.Sh HISTORY
-The
-.Fn index
-function first appeared in
-.At v7 .
-The
-.Fn strchr
-function first appeared in
-.At III
-and was reimplemented for
-.Bx 4.3 .