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Make FIFO special files (POSIX)
mkfifo [-p] [-m mode] file...
Neutrino
- -m mode
- When creating the FIFO special file, set the file permission
bits of the new file to the specified mode value.
The mode option argument is a
symbolic_mode string, as defined for the
chmod utility. In the symbolic_mode
strings, the op characters + and
- are interpreted relative to the default file mode for
that file type, as follows:
- +
- Add permissions to the default mode.
- -
- Delete permissions from the default mode.
- =
- Assign permissions.
- -p
- Create directories in the FIFOs pathname, if required.
- file
- The pathname at which a FIFO special file is to be created.
The mkfifo utility creates the FIFO special files
specified by the file operands in the order they're
specified.
To create a FIFO in a directory, you must have write
permission for that directory or be logged in as root.
The default file mode for FIFO files is a=rw
(666) with selected permissions removed in accordance with the file mode
creation mask
(see umask).
For intermediate pathname components created by mkfifo,
the mode is the default modified by u+wx so that any
subdirectories and the FIFO file can always be created regardless
of the file mode creation mask. If you wish to assign different ultimate
permissions for the intermediate directories, you can change these
permissions afterward with the
chmod utility.
- 0
- Success.
- > 0
- An error occurred.
If the mkfifo utility is terminated by a signal, some
of the specified FIFO special files or intermediate directories
might have already been created, and may not be automatically removed.
chmod,
ln,
mkdir,
touch
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