4.3BSD-Reno/src/lib/libc/string/strstr.3

.\" Copyright (c) 1990 The Regents of the University of California.
.\" All rights reserved.
.\"
.\" This code is derived from software contributed to Berkeley by
.\" Chris Torek.
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.\"	@(#)strstr.3	5.1 (Berkeley) 5/15/90
.\"
.TH STRSTR 3 "May 15, 1990"
.UC 7
.SH NAME
strstr \- locate a substring in a string
.SH SYNOPSIS
.nf
.ft B
#include <string.h>

char *
strstr(const char *big, const char *little);
.ft R
.fi
.SH DESCRIPTION
.B Strstr
locates the first occurrence of the null-terminated string
.I little
in the null-terminated string
.IR big .
If
.I little
is the empty string,
.B strstr
returns
.IR big ;
if
.I little
occurs nowhere in
.IR big ,
.B strstr
returns NULL;
otherwise
.B strstr
returns a pointer to the first character of the first occurrence of
.IR little .
.SH SEE ALSO
index(3), memchr(3), rindex(3), strchr(3), strcspn(3), strpbrk(3), strrchr(3),
strsep(3), strspn(3), strtok(3)
.SH STANDARDS
.B Strstr
conforms to ANSI X3.159-1989 (``ANSI C'').