mkdir [-p][-m mode] dir...
The mkdir utility shall create the directories specified by the operands, in the order specified.
For each dir operand, the mkdir utility shall perform actions equivalent to the mkdir() function defined in the System Interfaces volume of IEEE Std 1003.1-2001, called with the following arguments:
The dir operand is used as the path argument.
The value of the bitwise-inclusive OR of S_IRWXU, S_IRWXG, and S_IRWXO is used as the mode argument. (If the -m option is specified, the mode option-argument overrides this default.)
The mkdir utility shall conform to the Base Definitions volume of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax Guidelines.
The following options shall be supported:
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 $(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 shall be ignored without error.
The following operand shall be supported:
Not used.
None.
The following environment variables shall affect the execution of mkdir:
Default.
Not used.
The standard error shall be used only for diagnostic messages.
None.
None.
The following exit values shall be returned:
Default.
The following sections are informative.
The default file mode for directories is a= rwx (777 on most systems) with selected permissions removed in accordance with the file mode creation mask. For intermediate pathname components created by mkdir, the mode is the default modified by u+ wx 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 chmod.
Note that some of the requested directories may have been created even if an error occurs.
None.
The System V -m option was included to control the file mode.
The System V -p option was included to create any needed intermediate directories and to complement the functionality provided by rmdir for removing directories in the path prefix as they become empty. Because no error is produced if any path component already exists, the -p option is also useful to ensure that a particular directory exists.
The functionality of mkdir is described substantially through a reference to the mkdir() function in the System Interfaces volume of IEEE Std 1003.1-2001. 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 mkdir() function. In this way, there is less duplication of effort required for describing details of the directory creation.
None.
chmod() , rm , rmdir() , umask() , the System Interfaces volume of IEEE Std 1003.1-2001, mkdir()