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MKDIR(1P)                  POSIX Programmer's Manual                 MKDIR(1P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface  may  not  be
       implemented on Linux.

NAME
       mkdir - make directories

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

DESCRIPTION
       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:

        1. The dir operand is used as the path argument.


        2. 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.)


OPTIONS
       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:

       -m  mode
              Set the file permission bits of the newly-created directory  to  the  specified  mode  value.  The  mode
              option-argument  shall  be  the  same  as  the  mode  operand defined for the chmod utility. In the sym-
              bolic_mode strings, the op characters '+' and '-' shall be interpreted relative to  an  assumed  initial
              mode  of  a=  rwx;  '+' shall add permissions to the default mode, '-' shall delete permissions from the
              default mode.

       -p     Create any missing intermediate pathname components.

       For each dir operand that does not name an existing directory, effects equivalent to those caused by  the  fol-
       lowing 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.


OPERANDS
       The following operand shall be supported:

       dir    A pathname of a directory to be created.


STDIN
       Not used.

INPUT FILES
       None.

ENVIRONMENT VARIABLES
       The following environment variables shall affect the execution of mkdir:

       LANG   Provide  a  default  value  for the internationalization variables that are unset or null. (See the Base
              Definitions volume of IEEE Std 1003.1-2001, Section 8.2, Internationalization Variables for  the  prece-
              dence of internationalization variables used to determine the values of locale categories.)

       LC_ALL If set to a non-empty string value, override the values of all the other internationalization variables.

       LC_CTYPE
              Determine the locale for the interpretation of sequences of bytes of text data as characters (for  exam-
              ple, single-byte as opposed to multi-byte characters in arguments).

       LC_MESSAGES
              Determine  the locale that should be used to affect the format and contents of diagnostic messages writ-
              ten to standard error.

       NLSPATH
              Determine the location of message catalogs for the processing of LC_MESSAGES .


ASYNCHRONOUS EVENTS
       Default.

STDOUT
       Not used.

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The following exit values shall be returned:

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

       >0     An error occurred.


CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       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 cre-
       ation 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.

EXAMPLES
       None.

RATIONALE
       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 func-
       tionality 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.

FUTURE DIRECTIONS
       None.

SEE ALSO
       chmod(), rm, rmdir(), umask(), the System Interfaces volume of IEEE Std 1003.1-2001, mkdir()

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Stan-
       dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base  Specifica-
       tions  Issue  6,  Copyright (C) 2001-2003 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 Stan-
       dard,  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 .



IEEE/The Open Group                  2003                            MKDIR(1P)