MKFIFO(8) Maintenance Commands and Procedures MKFIFO(8)
NAME
mkfifo - make FIFO special file
SYNOPSIS
/usr/bin/mkfifo [
-m mode]
file...
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 standard error and continues
with the remaining arguments, if any.
The
mkfifo utility calls the library routine
mkfifo(3C), with a
path argument equivalent to the
file 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/mkfifo 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. For a symbolic mode option-argument, 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(7) 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(7) 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(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
SEE ALSO
chmod(1),
umask(1),
mkfifo(3C),
attributes(7),
environ(7),
largefile(7),
standards(7) June 24, 2020 MKFIFO(8)
