The mkfifo command 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 the standard error and continues with the remaining arguments, if any.
The mkfifo command calls the library routine mkfifo(3C),
with the path argument is passed as the path 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 umask(1).
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