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Diffstat (limited to 'man3/strnlen.3')
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diff --git a/man3/strnlen.3 b/man3/strnlen.3 new file mode 100644 index 0000000..eeaf3c6 --- /dev/null +++ b/man3/strnlen.3 @@ -0,0 +1,84 @@ +'\" t +.\" Copyright (c) Bruno Haible <haible@clisp.cons.org> +.\" +.\" SPDX-License-Identifier: GPL-2.0-or-later +.\" +.\" References consulted: +.\" GNU glibc-2 source code and manual +.\" +.TH strnlen 3 2023-07-20 "Linux man-pages 6.05.01" +.SH NAME +strnlen \- determine the length of a fixed-size string +.SH LIBRARY +Standard C library +.RI ( libc ", " \-lc ) +.SH SYNOPSIS +.nf +.B #include <string.h> +.PP +.BI "size_t strnlen(const char " s [. maxlen "], size_t " maxlen ); +.fi +.PP +.RS -4 +Feature Test Macro Requirements for glibc (see +.BR feature_test_macros (7)): +.RE +.PP +.BR strnlen (): +.nf + Since glibc 2.10: + _POSIX_C_SOURCE >= 200809L + Before glibc 2.10: + _GNU_SOURCE +.fi +.SH DESCRIPTION +The +.BR strnlen () +function returns the number of bytes in the string +pointed to by +.IR s , +excluding the terminating null byte (\[aq]\e0\[aq]), +but at most +.IR maxlen . +In doing this, +.BR strnlen () +looks only at the first +.I maxlen +characters in the string pointed to by +.I s +and never beyond +.IR s[maxlen\-1] . +.SH RETURN VALUE +The +.BR strnlen () +function returns +.IR strlen(s) , +if that is less than +.IR maxlen , +or +.I maxlen +if there is no null terminating (\[aq]\e0\[aq]) among the first +.I maxlen +characters pointed to by +.IR s . +.SH ATTRIBUTES +For an explanation of the terms used in this section, see +.BR attributes (7). +.TS +allbox; +lbx lb lb +l l l. +Interface Attribute Value +T{ +.na +.nh +.BR strnlen () +T} Thread safety MT-Safe +.TE +.sp 1 +.SH STANDARDS +POSIX.1-2008. +.SH HISTORY +POSIX.1-2008. +.SH SEE ALSO +.BR strlen (3) |