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+'\" et
+.TH MKFIFO "1P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+mkfifo
+\(em make FIFO special files
+.SH SYNOPSIS
+.LP
+.nf
+mkfifo \fB[\fR-m \fImode\fB] \fIfile\fR...
+.fi
+.SH DESCRIPTION
+The
+.IR mkfifo
+utility shall create the FIFO special files specified by the operands,
+in the order specified.
+.P
+For each
+.IR file
+operand, the
+.IR mkfifo
+utility shall perform actions equivalent to the
+\fImkfifo\fR()
+function defined in the System Interfaces volume of POSIX.1\(hy2017, called with the following arguments:
+.IP " 1." 4
+The
+.IR file
+operand is used as the
+.IR path
+argument.
+.IP " 2." 4
+The value of the bitwise-inclusive OR of S_IRUSR, S_IWUSR, S_IRGRP,
+S_IWGRP, S_IROTH, and S_IWOTH is used as the
+.IR mode
+argument. (If the
+.BR \-m
+option is specified, the value of the
+\fImkfifo\fR()
+.IR mode
+argument is unspecified, but the FIFO shall at no time have permissions
+less restrictive than the
+.BR \-m
+.IR mode
+option-argument.)
+.SH OPTIONS
+The
+.IR mkfifo
+utility shall conform to the Base Definitions volume of POSIX.1\(hy2017,
+.IR "Section 12.2" ", " "Utility Syntax Guidelines".
+.P
+The following option shall be supported:
+.IP "\fB\-m\ \fImode\fR" 10
+Set the file permission bits of the newly-created FIFO to the specified
+.IR mode
+value. The
+.IR mode
+option-argument shall be the same as the
+.IR mode
+operand defined for the
+.IR chmod
+utility. In the
+.IR symbolic_mode
+strings, the
+.IR op
+characters
+.BR '\(pl' 
+and
+.BR '\-' 
+shall be interpreted relative to an assumed initial mode of
+.IR a =\c
+.IR rw .
+.SH OPERANDS
+The following operand shall be supported:
+.IP "\fIfile\fR" 10
+A pathname of the FIFO special file to be created.
+.SH STDIN
+Not used.
+.SH "INPUT FILES"
+None.
+.SH "ENVIRONMENT VARIABLES"
+The following environment variables shall affect the execution of
+.IR mkfifo :
+.IP "\fILANG\fP" 10
+Provide a default value for the internationalization variables that are
+unset or null. (See the Base Definitions volume of POSIX.1\(hy2017,
+.IR "Section 8.2" ", " "Internationalization Variables"
+for the precedence of internationalization variables used to determine
+the values of locale categories.)
+.IP "\fILC_ALL\fP" 10
+If set to a non-empty string value, override the values of all the
+other internationalization variables.
+.IP "\fILC_CTYPE\fP" 10
+Determine the locale for the interpretation of sequences of bytes of
+text data as characters (for example, single-byte as opposed to
+multi-byte characters in arguments).
+.IP "\fILC_MESSAGES\fP" 10
+.br
+Determine the locale that should be used to affect the format and
+contents of diagnostic messages written to standard error.
+.IP "\fINLSPATH\fP" 10
+Determine the location of message catalogs for the processing of
+.IR LC_MESSAGES .
+.SH "ASYNCHRONOUS EVENTS"
+Default.
+.SH STDOUT
+Not used.
+.SH STDERR
+The standard error shall be used only for diagnostic messages.
+.SH "OUTPUT FILES"
+None.
+.SH "EXTENDED DESCRIPTION"
+None.
+.SH "EXIT STATUS"
+The following exit values shall be returned:
+.IP "\00" 6
+All the specified FIFO special files were created successfully.
+.IP >0 6
+An error occurred.
+.SH "CONSEQUENCES OF ERRORS"
+Default.
+.LP
+.IR "The following sections are informative."
+.SH "APPLICATION USAGE"
+None.
+.SH EXAMPLES
+None.
+.SH RATIONALE
+This utility was added to permit shell applications to create FIFO
+special files.
+.P
+The
+.BR \-m
+option was added to control the file mode, for consistency with the
+similar functionality provided by the
+.IR mkdir
+utility.
+.P
+Early proposals included a
+.BR \-p
+option similar to the
+.IR mkdir
+.BR \-p
+option that created intermediate directories leading up to the FIFO
+specified by the final component. This was removed because it is not
+commonly needed and is not common practice with similar utilities.
+.P
+The functionality of
+.IR mkfifo
+is described substantially through a reference to the
+\fImkfifo\fR()
+function in the System Interfaces volume of POSIX.1\(hy2017. For example, by default, the mode of the FIFO
+file is affected by the file mode creation mask in accordance with the
+specified behavior of the
+\fImkfifo\fR()
+function. In this way, there is less duplication of effort required for
+describing details of the file creation.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIchmod\fR\^",
+.IR "\fIumask\fR\^"
+.P
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "Chapter 8" ", " "Environment Variables",
+.IR "Section 12.2" ", " "Utility Syntax Guidelines"
+.P
+The System Interfaces volume of POSIX.1\(hy2017,
+.IR "\fImkfifo\fR\^(\|)"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+In the event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .
+.PP
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .