1*2fe8fb19SBen Gras.\" Copyright (c) 1990, 1991, 1993 2*2fe8fb19SBen Gras.\" The Regents of the University of California. All rights reserved. 3*2fe8fb19SBen Gras.\" 4*2fe8fb19SBen Gras.\" This code is derived from software contributed to Berkeley by 5*2fe8fb19SBen Gras.\" Chris Torek and the American National Standards Committee X3, 6*2fe8fb19SBen Gras.\" on Information Processing Systems. 7*2fe8fb19SBen Gras.\" 8*2fe8fb19SBen Gras.\" Redistribution and use in source and binary forms, with or without 9*2fe8fb19SBen Gras.\" modification, are permitted provided that the following conditions 10*2fe8fb19SBen Gras.\" are met: 11*2fe8fb19SBen Gras.\" 1. Redistributions of source code must retain the above copyright 12*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer. 13*2fe8fb19SBen Gras.\" 2. Redistributions in binary form must reproduce the above copyright 14*2fe8fb19SBen Gras.\" notice, this list of conditions and the following disclaimer in the 15*2fe8fb19SBen Gras.\" documentation and/or other materials provided with the distribution. 16*2fe8fb19SBen Gras.\" 3. Neither the name of the University nor the names of its contributors 17*2fe8fb19SBen Gras.\" may be used to endorse or promote products derived from this software 18*2fe8fb19SBen Gras.\" without specific prior written permission. 19*2fe8fb19SBen Gras.\" 20*2fe8fb19SBen Gras.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21*2fe8fb19SBen Gras.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22*2fe8fb19SBen Gras.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23*2fe8fb19SBen Gras.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24*2fe8fb19SBen Gras.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25*2fe8fb19SBen Gras.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26*2fe8fb19SBen Gras.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27*2fe8fb19SBen Gras.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28*2fe8fb19SBen Gras.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29*2fe8fb19SBen Gras.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30*2fe8fb19SBen Gras.\" SUCH DAMAGE. 31*2fe8fb19SBen Gras.\" 32*2fe8fb19SBen Gras.\" from: @(#)strlen.3 8.1 (Berkeley) 6/4/93 33*2fe8fb19SBen Gras.\" $NetBSD: strlen.3,v 1.9 2009/05/01 17:27:01 perry Exp $ 34*2fe8fb19SBen Gras.\" 35*2fe8fb19SBen Gras.Dd May 1, 2009 36*2fe8fb19SBen Gras.Dt STRLEN 3 37*2fe8fb19SBen Gras.Os 38*2fe8fb19SBen Gras.Sh NAME 39*2fe8fb19SBen Gras.Nm strlen , 40*2fe8fb19SBen Gras.Nm strnlen 41*2fe8fb19SBen Gras.Nd find length of string 42*2fe8fb19SBen Gras.Sh LIBRARY 43*2fe8fb19SBen Gras.Lb libc 44*2fe8fb19SBen Gras.Sh SYNOPSIS 45*2fe8fb19SBen Gras.In string.h 46*2fe8fb19SBen Gras.Ft size_t 47*2fe8fb19SBen Gras.Fn strlen "const char *s" 48*2fe8fb19SBen Gras.Ft size_t 49*2fe8fb19SBen Gras.Fn strnlen "const char *s" "size_t maxlen" 50*2fe8fb19SBen Gras.Sh DESCRIPTION 51*2fe8fb19SBen GrasThe 52*2fe8fb19SBen Gras.Fn strlen 53*2fe8fb19SBen Grasfunction 54*2fe8fb19SBen Grascomputes the length of the string 55*2fe8fb19SBen Gras.Fa s . 56*2fe8fb19SBen Gras.Pp 57*2fe8fb19SBen GrasThe 58*2fe8fb19SBen Gras.Fn strnlen 59*2fe8fb19SBen Grasfunction attempts to compute the length of 60*2fe8fb19SBen Gras.Fa s , 61*2fe8fb19SBen Grasbut never scans beyond the first 62*2fe8fb19SBen Gras.Fa maxlen 63*2fe8fb19SBen Grasbytes of 64*2fe8fb19SBen Gras.Fa s . 65*2fe8fb19SBen Gras.Sh RETURN VALUES 66*2fe8fb19SBen GrasThe 67*2fe8fb19SBen Gras.Fn strlen 68*2fe8fb19SBen Grasfunction 69*2fe8fb19SBen Grasreturns 70*2fe8fb19SBen Grasthe number of characters that precede the 71*2fe8fb19SBen Grasterminating 72*2fe8fb19SBen Gras.Dv NUL 73*2fe8fb19SBen Grascharacter. 74*2fe8fb19SBen Gras.Pp 75*2fe8fb19SBen GrasThe 76*2fe8fb19SBen Gras.Fn strnlen 77*2fe8fb19SBen Grasfunction returns either the same result as 78*2fe8fb19SBen Gras.Fn strlen 79*2fe8fb19SBen Grasor 80*2fe8fb19SBen Gras.Fa maxlen , 81*2fe8fb19SBen Graswhichever is smaller. 82*2fe8fb19SBen Gras.Sh SEE ALSO 83*2fe8fb19SBen Gras.Xr string 3 , 84*2fe8fb19SBen Gras.Xr wcslen 3 , 85*2fe8fb19SBen Gras.Xr wcswidth 3 86*2fe8fb19SBen Gras.Sh STANDARDS 87*2fe8fb19SBen GrasThe 88*2fe8fb19SBen Gras.Fn strlen 89*2fe8fb19SBen Grasfunction 90*2fe8fb19SBen Grasconforms to 91*2fe8fb19SBen Gras.St -isoC . 92*2fe8fb19SBen GrasThe 93*2fe8fb19SBen Gras.Fn strnlen 94*2fe8fb19SBen Grasfunction conforms to 95*2fe8fb19SBen Gras.St -p1003.1-2008 . 96