93 lines
2.6 KiB
Groff
93 lines
2.6 KiB
Groff
.\" Copyright (c) 1990, 1991, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" This code is derived from software contributed to Berkeley by
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.\" Chris Torek and the American National Standards Committee X3,
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.\" on Information Processing Systems.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)strlen.3 8.1 (Berkeley) 6/4/93
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.\" $FreeBSD$
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.\"
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.Dd February 28, 2009
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.Dt STRLEN 3
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.Os
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.Sh NAME
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.Nm strlen, strnlen
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.Nd find length of string
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In string.h
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.Ft size_t
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.Fn strlen "const char *s"
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.Ft size_t
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.Fn strnlen "const char *s" "size_t maxlen"
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.Sh DESCRIPTION
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The
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.Fn strlen
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function
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computes the length of the string
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.Fa s .
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The
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.Fn strnlen
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function attempts to compute the length of
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.Fa s ,
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but never scans beyond the first
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.Fa maxlen
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bytes of
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.Fa s .
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.Sh RETURN VALUES
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The
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.Fn strlen
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function
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returns
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the number of characters that precede the
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terminating
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.Dv NUL
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character.
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The
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.Fn strnlen
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function returns either the same result as
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.Fn strlen
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or
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.Fa maxlen ,
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whichever is smaller.
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.Sh SEE ALSO
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.Xr string 3 ,
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.Xr wcslen 3 ,
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.Xr wcswidth 3
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.Sh STANDARDS
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The
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.Fn strlen
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function
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conforms to
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.St -isoC .
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The
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.Fn strnlen
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function conforms to
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.St -p1003.1-2008 .
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