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RedHat 9 (Linux i386) - man page for strnlen (redhat section 3)

STRNLEN(3)			    Linux Programmer's Manual			       STRNLEN(3)

NAME
       strnlen - 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
       strlen(3)

GNU					    1999-07-25				       STRNLEN(3)


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