MKFIFO(1M)MKFIFO(1M)NAMEmkfifo - 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) com‐
mand. 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_MES‐
SAGES, 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 ALSOchmod(1), umask(1), mkfifo(3C), attributes(5), environ(5), large‐
file(5), standards(5)
Aug 11, 2009 MKFIFO(1M)
