mirror of https://github.com/mkerrisk/man-pages
33 lines
1.2 KiB
Groff
33 lines
1.2 KiB
Groff
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.\" Copyright (c) Bruno Haible <haible@clisp.cons.org>
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.\"
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" References consulted:
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.\" GNU glibc-2 source code and manual
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.\"
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.TH STRNLEN 3 1999-07-25 "GNU" "Linux Programmer's Manual"
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.SH NAME
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strnlen \- determine the length of a fixed-size string
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.SH SYNOPSIS
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.nf
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.B #include <string.h>
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.sp
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.BI "size_t strnlen(const char *" s ", size_t " maxlen );
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.fi
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.SH DESCRIPTION
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The \fBstrnlen\fP function returns the number of characters in the string
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pointed to by \fIs\fP, not including the terminating '\\0' character, but
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at most \fImaxlen\fP. In doing this, \fBstrnlen\fP looks only at the first
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\fImaxlen\fP characters at \fIs\fP and never beyond \fIs+maxlen\fP.
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.SH "RETURN VALUE"
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The \fBstrnlen\fP function returns \fIstrlen(s)\fP, if that is less than
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\fImaxlen\fP, or \fImaxlen\fP if there is no '\\0' character among the first
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\fImaxlen\fP characters pointed to by \fIs\fP.
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.SH "CONFORMING TO"
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This function is a GNU extension.
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.SH "SEE ALSO"
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.BR strlen (3)
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