Section: POSIX Programmer's Manual (1P)
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.
--- make directories
mkdir [-p] [-m mode] dir...
utility shall create the directories specified by the operands, in the
utility shall perform actions equivalent to the
function defined in the System Interfaces volume of POSIX.1-2008, called with the following arguments:
operand is used as the
The value of the bitwise-inclusive OR of S_IRWXU, S_IRWXG, and S_IRWXO
is used as the
argument. (If the
option is specified, the value of the
argument is unspecified, but the directory shall at no time
have permissions less restrictive than the
utility shall conform to the Base Definitions volume of POSIX.1-2008,
, Utility Syntax Guidelines.
The following options shall be supported:
- -m mode
Set the file permission bits of the newly-created directory to the
option-argument shall be the same as the
operand defined for the
utility. In the
shall be interpreted relative to an assumed initial mode of
shall add permissions to the default mode,
shall delete permissions from the default mode.
Create any missing intermediate pathname components.
operand that does not name an existing directory, before performing the
actions described in the DESCRIPTION above, the
utility shall create any pathname components of the path prefix of
that do not name an existing directory by performing actions equivalent
to first calling the
function with the following arguments:
A pathname naming the missing pathname component, ending with a trailing
character, as the
The value zero as the
and then calling the
function with the following arguments:
argument as in the
is the file mode creation mask of the process (see the System Interfaces volume of POSIX.1-2008,
operand that names an existing directory shall be ignored without
The following operand shall be supported:
A pathname of a directory to be created.
The following environment variables shall affect the execution of
Provide a default value for the internationalization variables that are
unset or null. (See the Base Definitions volume of POSIX.1-2008,
Section 8.2, Internationalization Variables
for the precedence of internationalization variables used to determine
the values of locale categories.)
If set to a non-empty string value, override the values of all the
other internationalization variables.
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).
Determine the locale that should be used to affect the format and
contents of diagnostic messages written to standard error.
Determine the location of message catalogs for the processing of
The standard error shall be used only for diagnostic messages.
The following exit values shall be returned:
All the specified directories were created successfully or the
option was specified and all the specified directories now exist.
An error occurred.
CONSEQUENCES OF ERRORS
The following sections are informative.
The default file mode for directories is
(777 on most systems) with selected permissions removed in accordance
with the file mode creation mask. For intermediate pathname components
the mode is the default modified by
so that the subdirectories can always be created regardless of the file
mode creation mask; if different ultimate permissions are desired for
the intermediate directories, they can be changed afterwards with
Note that some of the requested directories may have been created even
if an error occurs.
The System V
option was included to control the file mode.
The System V
option was included to create any needed intermediate directories and
to complement the functionality provided by
for removing directories in the path prefix as they become empty.
Because no error is produced if any path component already exists, the
option is also useful to ensure that a particular directory exists.
The functionality of
is described substantially through a reference to the
function in the System Interfaces volume of POSIX.1-2008. For example, by default, the mode of the
directory is affected by the file mode creation mask in accordance with
the specified behavior of the
function. In this way, there is less duplication of effort required for
describing details of the directory creation.
The Base Definitions volume of POSIX.1-2008,
Chapter 8, Environment Variables,
Section 12.2, Utility Syntax Guidelines
The System Interfaces volume of POSIX.1-2008,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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
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