diff options
Diffstat (limited to 'lib/libc/string/strlen.3')
| -rw-r--r-- | lib/libc/string/strlen.3 | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/lib/libc/string/strlen.3 b/lib/libc/string/strlen.3 index 29c35158284f..f7aa033ae8b7 100644 --- a/lib/libc/string/strlen.3 +++ b/lib/libc/string/strlen.3 @@ -32,11 +32,11 @@ .\" @(#)strlen.3 8.1 (Berkeley) 6/4/93 .\" $FreeBSD$ .\" -.Dd June 4, 1993 +.Dd February 28, 2009 .Dt STRLEN 3 .Os .Sh NAME -.Nm strlen +.Nm strlen, strnlen .Nd find length of string .Sh LIBRARY .Lb libc @@ -44,12 +44,22 @@ .In string.h .Ft size_t .Fn strlen "const char *s" +.Ft size_t +.Fn strnlen "const char *s" "size_t maxlen" .Sh DESCRIPTION The .Fn strlen function computes the length of the string .Fa s . +The +.Fn strnlen +function attempts to compute the length of +.Fa s , +but never scans beyond the first +.Fa maxlen +bytes of +.Fa s . .Sh RETURN VALUES The .Fn strlen @@ -59,6 +69,13 @@ the number of characters that precede the terminating .Dv NUL character. +The +.Fn strnlen +function returns either the same result as +.Fn strlen +or +.Fa maxlen , +whichever is smaller. .Sh SEE ALSO .Xr string 3 .Sh STANDARDS @@ -67,3 +84,7 @@ The function conforms to .St -isoC . +The +.Fn strnlen +function conforms to +.St -p1003.1-2008 . |