.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
.\" 386BSD man pages
.\" Modified Sat Jul 24 18:02:26 1993 by Rik Faith (faith@cs.unc.edu)
-.TH STRLEN 3 2012-05-04 "GNU" "Linux Programmer's Manual"
+.TH STRLEN 3 2014-02-25 "GNU" "Linux Programmer's Manual"
.SH NAME
strlen \- calculate the length of a string
.SH SYNOPSIS
.BR strlen ()
function returns the number of bytes in the string
.IR s .
+.SH ATTRIBUTES
+.SS Multithreading (see pthreads(7))
+The
+.BR strlen ()
+function is thread-safe.
.SH CONFORMING TO
SVr4, 4.3BSD, C89, C99.
.SH SEE ALSO