man pages section 1: User Commands

mkdir(1)

NAME

mkdir- Make directories

SYNOPSIS

mkdir

-m

mode

-p

-M

dir

DESCRIPTION

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.

OPTIONS

The following options are supported:

-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 will be 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).
-M: With this option, mkdir creates dir as a multilevel directory.

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 ( 2³¹ bytes).

EXAMPLES

Example 1 Using mkdir

The following example:

example% mkdir -p ltr/jd/jan

ltr/jd/jan

Example 2 Using filesystem attributes to create a multilevel directory

The following example specifies a new adornment or prefix for filesystem1 and creates a multilevel directory with the specified MLD prefix [see setfsattr(1M)]:

example% setfsattr -m .MULTI. /dev/filesystem1 
example% mount /dev/filesystem1 /mnt 
example% mkdir /mnt/.MULTI.directory1

ENVIRONMENT VARIABLES

See environ(5) for descriptions of the following environment variables that affect the execution of mkdir: 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:

`ATTRIBUTE TYPE`	`ATTRIBUTE VALUE`
Availability	SUNWcsu
CSI	enabled

SUMMARY OF TRUSTED SOLARIS CHANGES

The -M option creates a multilevel directory. Multilevel directories can also be created without the -M option by specifying a directory name with the MLD prefix for that filesystem. See the example above using setfsattr(1M).

Trusted Solaris 8 Reference Manual

setfsattr(1M), intro(2), mkdir(2)

SunOS 5.8 Reference Manual

rm(1), sh(1), umask(1), attributes(5), environ(5), largefile(5)

Trusted Solaris 8 Last Revised 11 May 1998