mkfifo - make FIFO special file
/usr/bin/mkfifo [-m mode] file...
mkfifo [ options ] file...
The mkfifo utility 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.
If errors are encountered in creating one of the special files,
mkfifo writes a diagnostic message to standard error and continues
with the remaining arguments, if any.
The mkfifo utility calls the library routine
mkfifo(3C), with a path argument equivalent to the file
argument from the command line, and mode is set to the equivalent of
a=rw, modified by the current value of the file mode creation mask
The mkfifo utility creates one or more FIFOs. By default, the mode
of the created FIFO is a=rw minus the bits set in umask(1).
The following option is supported for /usr/bin/mkfifo:
The following option is supported for ksh93:
Set the file permission bits of the newly-created
to the specified mode
value. The mode
option-argument will be the same as the mode
operand defined for the
command. For a symbolic mode option-argument, the op
will be interpreted relative to an
assumed initial mode of a=rw
The following operand is supported:
Set the mode of the created FIFO to mode
option-argument is a symbolic or octal mode as in chmod(1)
Relative modes assume an initial mode of a=rw
A path name of the FIFO special file to be
See largefile(5) for the description of the behavior of mkfifo
when encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
See environ(5) for descriptions of the following environment variables
that affect the execution of mkfifo: LANG, LC_ALL,
LC_CTYPE, LC_MESSAGES, and NLSPATH.
The following exit values are returned:
All the specified FIFO special files were created
An error occurred.
See attributes(5) for descriptions of the following attributes: