On 2012/12/17 18:26, Andres Perera wrote: > On Mon, Dec 17, 2012 at 6:13 PM, Stuart Henderson <s...@spacehopper.org> > wrote: > > On 2012-12-17, sven falempin <sven.falem...@gmail.com> wrote: > >> Hello misc readers, > >> > >> First, openBSD threads are awesome for debugging. > >> The trivial topic, > >> echo -ne "\x00" | nc XXXX port > >> send a null byte with a GNU echo. > >> > >> Echo in openbsd does not have -e (and does not warn whan i try it ..) > >> > >> Noob question: > >> How to send a null byte over netcat ? am i forced to use perl ? > > > > you can use octal with echo(1) or printf(1). > > echo(1) is BSD echo (no backslash sequences) > > ksh echo is XSI + BSD
ah, right. $ echo -n '\000' | hexdump -C 00000000 00 |.| 00000001 $ env echo -n '\000' | hexdump -C 00000000 5c 30 30 30 |\000| 00000004 in which case printf is probably a better idea.
