natfeats nfapi nf_stderr

"NF_STDERR"

This is part of basic set of features, that must always be implemented. It currently only defines a single function:

  sub-ID 0 - user allowed
  unsigned long output(const char *string);

Emit a null-terminated string of printable ASCII chars on a particular output stream, intended for use to display debug messages. Returns the number of chars printed. Characters not among the set of ASCII chars 9 (horizontal tabulation '\t'), 10, 13, (both meaning '\n' newline), 32-126 will have implementation defined representations.