man/man1/mkdir.1

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 MKDIR 1 "Nov 2, 2007"
 NAME
mkdir - make directories
 SYNOPSIS
 "/usr/bin/mkdir"

/usr/bin/mkdir [-m mode] [-p] dir...


 "ksh93"

mkdir [-p] [-m mode] dir...


 DESCRIPTION
 "/usr/bin/mkdir"

The mkdir command creates the named directories in mode 777
(possibly altered by the file mode creation mask umask(1)).

Standard entries in a directory (for instance, the files ".", for the
directory itself, and ".\|.", for its parent) are made automatically.
mkdir cannot create these entries by name. Creation of a directory
requires write permission in the parent directory.

The owner-ID and group-ID of the new directories are set to the process's
effective user-ID and group-ID, respectively. mkdir calls the
mkdir(2) system call.
 "setgid and mkdir"

To change the setgid bit on a newly created directory, you must use
chmod g+s or chmod g-s after executing mkdir.

The setgid bit setting is inherited from the parent directory.
 "ksh93"

The mkdir built-in in ksh93 is associated with the /bin and
/usr/bin paths. It is invoked when mkdir is executed without a
pathname prefix and the pathname search finds a /bin/mkdir or
/usr/bin/mkdir executable. mkdir creates one or more directories.
By default, the mode of created directories is a=rwx minus the bits set
in umask(1).
 OPTIONS
 "/usr/bin/mkdir"

The following options are supported by /usr/bin/mkdir:
-m mode

This option allows users to specify the mode to be used for new directories.
Choices for modes can be found in chmod(1).


-p

With this option, mkdir creates dir by creating all the
non-existing parent directories first. The mode given to intermediate
directories is the difference between 777 and the bits set in the file
mode creation mask. The difference, however, must be at least 300 (write
and execute permission for the user).


 "ksh93"

The following options are supported by the mkdir built-in in ksh93:
-m mode

--mode=mode

Set the mode of created directories to mode. mode is symbolic or
octal mode as in chmod(1). Relative modes assume an initial mode of
a=rwx.


-p

--parents

Create any missing intermediate pathname components. For each dir operand that
does not name an existing directory, effects equivalent to those caused by the
following command shall occur:
mkdir -p -m $(umask -S),u+wx \e
 $(dirname dir) && mkdir [-m mode] dir


Where the -m mode option represents that option supplied to the original
invocation of mkdir, if any. Each dir operand that names an
existing directory is ignored without error.


 OPERANDS

The following operand is supported:
dir

A path name of a directory to be created.


 USAGE

See largefile(5) for the description of the behavior of mkdir when
encountering files greater than or equal to 2 Gbyte ( 2^31 bytes).
 EXAMPLES

Example 1 Using mkdir

The following example:

example% mkdir -p ltr/jd/jan


creates the subdirectory structure ltr/jd/jan.

 ENVIRONMENT VARIABLES

See environ(5) for descriptions of the following environment variables
that affect the execution of mkdir: LANG, LC_ALL,
LC_CTYPE, LC_MESSAGES, and NLSPATH.
 EXIT STATUS

The following exit values are returned:
0

All the specified directories were created successfully or the -p option
was specified and all the specified directories now exist.


>0

An error occurred.


 ATTRIBUTES

See attributes(5) for descriptions of the following attributes:
 "/usr/bin/mkdir"


ATTRIBUTE TYPE ATTRIBUTE VALUE
CSI Enabled
Interface Stability Committed
Standard See standards(5).


 "ksh93"


ATTRIBUTE TYPE ATTRIBUTE VALUE
Interface Stability See below.
Standard See standards(5).


The ksh93 built-in binding to /bin and /usr/bin is Volatile.
The built-in interfaces are Uncommitted.
 SEE ALSO

chmod(1), ksh93(1), rm(1), sh(1), umask(1),
Intro(2), mkdir(2), attributes(5), environ(5),
largefile(5), standards(5)