mkfifo - Makes FIFO special files
mkfifo [-m mode] file...
utility creates FIFO special files in
the order specified.
Interfaces documented on this reference page conform to industry standards as follows:
mkfifo: XPG4, XPG4-UNIX
Refer to the
reference page for more information
about industry standards and associated tags.
Sets the file permission bits of the new file to the specified mode value, after creating the FIFO special file. The mode argument is a symbolic mode string (see chmod), in which the operator characters + (plus sign) and - (minus) are interpreted relative to the default file mode for that file type. The + character adds permissions to the default mode, and - deletes permissions from the default mode.
The path name of a FIFO special file to be created.
performs actions equivalent to the
call with the following arguments:
argument is used as the
option is not used, the value of
the bitwise inclusive OR of
is used as the
The mkfifo utility exits with one of the following values:
Indicates that all the specified FIFO special files were created
Indicates that an error occurred.
To create a FIFO special file with permissions prw-r--r--, enter: mkfifo -m 644 /tmp/myfifo
The following environment variables affect the execution of
Provides a default value for the internationalization variables
that are unset or null. If
is unset or null, the corresponding value from the default locale is used.
If any of the internationalization variables contain an invalid setting, the
utility behaves as if none of the variables had been defined.
If set to a non-empty string value, overrides the values of
all the other internationalization variables.
Determines the locale for the interpretation of sequences
of bytes of text data as characters (for example, single-byte as opposed to
multibyte characters in arguments).
Determines the locale for the format and contents of diagnostic
messages written to standard error.
Determines the location of message catalogues for the processing
Commands: mkdir(1), mknod(8)
Functions: chmod(2), mkdir(2), mkfifo(3), mknod(2), umask(2)