MKFIFO(1M) Maintenance Commands MKFIFO(1M)


NAME


mkfifo - make FIFO special file

SYNOPSIS


/usr/bin/mkfifo [-m mode] path...


ksh93
mkfifo [ options ] file...


DESCRIPTION


/usr/bin/mkfifo
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 the standard error and continues with the
remaining arguments, if any.


The mkfifo utility 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).

ksh93
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).

OPTIONS


/usr/bin/ksh93
The following option is supported for /usr/bin/mkfifo:

-m mode
Set the file permission bits of the newly-created FIFO to the
specified mode value. The mode option-argument will be the
same as the mode operand defined for the chmod(1) command. In
<symbolicmode> strings, the op characters + and - will be
interpreted relative to an assumed initial mode of a=rw.


ksh93
The following option is supported for ksh93:

-m mode
--mode=mode
Set the mode of the created FIFO to mode. The mode option-
argument is a symbolic or octal mode as in chmod(1).
Relative modes assume an initial mode of a=rw.


OPERANDS


The following operand is supported:

file
A path name of the FIFO special file to be created.


USAGE


See largefile(5) for the description of the behavior of mkfifo when
encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).

ENVIRONMENT VARIABLES


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.

EXIT STATUS


The following exit values are returned:

0
All the specified FIFO special files were created successfully.


>0
An error occurred.


ATTRIBUTES


See attributes(5) for descriptions of the following attributes:


+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+

SEE ALSO


chmod(1), umask(1), mkfifo(3C), attributes(5), environ(5), largefile(5),
standards(5)


August 11, 2009 MKFIFO(1M)