mkfifo(1M)

NAME
     mkfifo - make FIFO special file

SYNOPSIS
     mkfifo [-m mode] path ...

DESCRIPTION
     mkfifo creates the FIFO special files named by its argument list.  The
     arguments are taken sequentially, in the order specified; and each FIFO
     special file is either created completely or, in the case of an error or
     signal, not created at all.

     For each path argument, the mkfifo command behaves as if the function
     mkfifo [see mkfifo(2)] was called with the argument path set to path and
     the mode set to the bitwise inclusive OR of S_IRUSR, S_IWUSR, S_IRGRP,
     S_IWGRP, S_IROTH and S_IWOTH.

     If -m option is specified, the file permission bits of the newly created
     FIFO is set to the specified mode value.  The mode option argument is the
     same as the mode operand defined for the chmod utility.  In the
     symbolic_mode strings, the op characters + and - are interpreted relative
     to an assumed initial mode of a=rw.

     If errors are encountered in creating one of the special files, mkfifo
     writes a diagnostic message to the standard error and continues with the
     remaining arguments, if any.

SEE ALSO
     mkfifo(2)

DIAGNOSTICS
     mkfifo returns exit code 0 if all FIFO special files were created
     normally; otherwise it prints a diagnostic and returns a value greater
     than 0.