mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-29 12:03:03 +00:00
3fb3b97c4d
NetBSD, OpenBSD, and Android's Bionic number the clauses 1 through 3, so follow suit to make comparison easier.
93 lines
2.6 KiB
Groff
93 lines
2.6 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
|
|
.\" 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.
|
|
.\"
|
|
.\" @(#)strlen.3 8.1 (Berkeley) 6/4/93
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd February 28, 2009
|
|
.Dt STRLEN 3
|
|
.Os
|
|
.Sh NAME
|
|
.Nm strlen, strnlen
|
|
.Nd find length of string
|
|
.Sh LIBRARY
|
|
.Lb libc
|
|
.Sh SYNOPSIS
|
|
.In string.h
|
|
.Ft size_t
|
|
.Fn strlen "const char *s"
|
|
.Ft size_t
|
|
.Fn strnlen "const char *s" "size_t maxlen"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn strlen
|
|
function
|
|
computes the length of the string
|
|
.Fa s .
|
|
The
|
|
.Fn strnlen
|
|
function attempts to compute the length of
|
|
.Fa s ,
|
|
but never scans beyond the first
|
|
.Fa maxlen
|
|
bytes of
|
|
.Fa s .
|
|
.Sh RETURN VALUES
|
|
The
|
|
.Fn strlen
|
|
function
|
|
returns
|
|
the number of characters that precede the
|
|
terminating
|
|
.Dv NUL
|
|
character.
|
|
The
|
|
.Fn strnlen
|
|
function returns either the same result as
|
|
.Fn strlen
|
|
or
|
|
.Fa maxlen ,
|
|
whichever is smaller.
|
|
.Sh SEE ALSO
|
|
.Xr string 3 ,
|
|
.Xr wcslen 3 ,
|
|
.Xr wcswidth 3
|
|
.Sh STANDARDS
|
|
The
|
|
.Fn strlen
|
|
function
|
|
conforms to
|
|
.St -isoC .
|
|
The
|
|
.Fn strnlen
|
|
function conforms to
|
|
.St -p1003.1-2008 .
|