NetBSD/lib/libc/string/strstr.3

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.\" Copyright (c) 1990, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
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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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.\" from: @(#)strstr.3 8.1 (Berkeley) 6/4/93
.\" $NetBSD: strstr.3,v 1.5 1998/02/05 18:50:58 perry Exp $
.\"
.Dd June 4, 1993
.Dt STRSTR 3
.Os
.Sh NAME
.Nm strstr
.Nd locate a substring in a string
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.Fd #include <string.h>
.Ft char *
.Fn strstr "const char *big" "const char *little"
.Sh DESCRIPTION
The
.Fn strstr
function
locates the first occurrence of the null-terminated string
.Fa little
in the null-terminated string
.Fa big .
If
.Fa little
is the empty string,
.Fn strstr
returns
.Fa big ;
if
.Fa little
occurs nowhere in
.Fa big ,
.Fn strstr
returns NULL;
otherwise
.Fn strstr
returns a pointer to the first character of the first occurrence of
.Fa little .
.Sh SEE ALSO
.Xr index 3 ,
.Xr memchr 3 ,
.Xr rindex 3 ,
.Xr strchr 3 ,
.Xr strcspn 3 ,
.Xr strpbrk 3 ,
.Xr strrchr 3 ,
.Xr strsep 3 ,
.Xr strspn 3 ,
.Xr strtok 3
.Sh STANDARDS
The
.Fn strstr
function
conforms to
.St -ansiC .