s6
Software
skarnet.org
 The s6-mkfifodir program 
s6-mkfifodir creates a fifodir.
 Interface 
     s6-mkfifodir [ -f ] [ -g gid ] fifodir
s6-mkfifodir creates fifodir, belonging to the current user.
 Options 
 -  -f : force permissions. If fifodir already exists,
change its permissions according to the -g options. By default, if
fifodir exists, s6-mkfifodir does nothing. 
-  -g gid : make fifodir only listenable
by members of group gid. If this option is not given, the fifodir is
made publically listenable.