STRNLEN (3)
determine the length of a fixed-size string
SYNOPSIS
#include <string.h>
size_t strnlen (const char * s , size_t maxlen );
DESCRIPTION
The strnlen function returns the number of characters in the string
pointed to by s, not including the terminating '\\0' character, but
at most maxlen. In doing this, strnlen looks only at the first
maxlen characters at s and never beyond s+maxlen.
RETURN VALUE
The strnlen function returns strlen(s), if that is less than
maxlen, or maxlen if there is no '\\0' character among the first
maxlen characters pointed to by s.
CONFORMING TO
This function is a GNU extension.
SEE ALSO
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