HP-UX Reference (11i v1 05/09) - 1 User Commands A-M (vol 1)

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mkﬁfo(1) mkﬁfo(1)

NAME

mkﬁfo - make FIFO (named pipe) special ﬁles

SYNOPSIS

mkfifo [-p][-m mode ] ﬁlename ...

DESCRIPTION

mkfifo creates the FIFO special ﬁles named by its operand list. The operands are taken sequentially in

the order speciﬁed and, if the user has write permission in the appropriate directory, the

FIFO is created

with permissions 0666 modiﬁed by the user’s ﬁle mode creation mask (see umask(2)).

The speciﬁc actions performed are equivalent to calling

mkfifo(ﬁlename, 0666)

for each ﬁlename in the operand list (see mkﬁfo(3C)).

Options

mkfifo recognizes the following command-line options:

-m mode After creating the FIFO special ﬁle, set the permission bits of the new ﬁle to the

speciﬁed mode value. The mode option argument is a symbolic mode string as deﬁned

in chmod(1).

(XPG4 Only.) In the symbolic mode strings, the operators + and - will be interpreted

relative to an initial mode of a=rw.

-p Create any missing intermediate path name components.

EXTERNAL INFLUENCES

Environment Variables

LANG determines the locale to use for the locale categories when both LC_ALL and the corresponding

environment variable (beginning with LC_) do not specify a locale. If LANG is not speciﬁed or is set to the

empty string, a default of "C" (see lang(5)) is used.

LC_ALL determines the locale to use to override any values for locale categories speciﬁed by the settings of

LANG or any environment variables beginning with LC_.

LC_CTYPE determines the locale for the interpretation of sequences of bytes of text data as characters

(e.g., single- versus multibyte characters in arguments).

If any internationalization variable contains an invalid setting,

mkfifo behaves as if all internationaliza-

tion variables are set to "C". See environ(5).

International Code Set Support

Single-byte character code sets are supported.

RETURN VALUE

mkfifo returns zero if invoked with at least one operand and if all FIFO special ﬁles were created success-

fully. Otherwise, it prints a diagnostic message and returns non-zero.

EXAMPLES

The following command creates a FIFO special ﬁle named peacepipe in the current directory:

mkfifo peacepipe