creating a directory tree Post: 302360015

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Top Forums Shell Programming and Scripting creating a directory tree Post 302360015 by Scrutinizer on Thursday 8th of October 2009 03:10:25 AM

10-08-2009

Moderator

Hi NBaH,

When cooking something recursive I think there are two essential ingredients:

local variables ( "typeset var" )
variable passing

There are multiple functions active at the same time and their variables should not interfere with parent's variables. To make a distinction between local and global variables I used lower case and upper case. Also there was a while loop in the generate function that should be an if statement.

Code:

#!/bin/bash
#set -x

read -p " What root directory? " ROOTDIR
[ -d $ROOTDIR ] && { /bin/rm -R $ROOTDIR; mkdir $ROOTDIR; } || mkdir $ROOTDIR
read -p " How many directories? " DIRNB
read -p " How many levels? " LEVNB

generate() {
   typeset path=$1
   typeset level=$2
   typeset directory
   typeset n
   ((level++))
   for (( n=0; n < ${DIRNB:-1}; n++ )); do
      mkdir $path/directory$n
   done
   if [ $level -lt ${LEVNB:-1} ]; then
      for directory in $path/*; do
         generate $directory $level
      done
   fi
}
LEVEL=0
generate $ROOTDIR $LEVEL
find $ROOTDIR

---------- Post updated at 11:10 PM ---------- Previous update was at 10:33 PM ----------

Also, if you move the creation of the topdir at each level to the function, you can make it a bit shorter:

Code:

#!/bin/bash

read -p " What root directory?     " ROOTDIR
read -p " How many subdirectories? " SUBDIRS
read -p " How many levels?         " LEVELS
if [ -d $ROOTDIR ]; then
  echo $ROOTDIR exist
  exit 1
fi

generate() {
   typeset path=$1
   typeset level=$2
   typeset n
   mkdir $path
   if (( level > 0 )); then
     for (( n=0; n < SUBDIRS; n++ )); do
        generate $path/directory$n $((level-1))
     done
   fi
}

generate $ROOTDIR $LEVELS
find $ROOTDIR

Scrutinizer

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LEARN ABOUT OPENSOLARIS

gnomevfs-mkdir

gnomevfs-mkdir(1)						   User Commands						 gnomevfs-mkdir(1)

NAME

       gnomevfs-mkdir - make a new directory at a VFS location

SYNOPSIS

       gnomevfs-mkdir -p URI

DESCRIPTION

       gnomevfs-mkdir is obsolete.  It has been superseded by gvfs-mkdir.  See gvfs-mkdir(1).

       gnomevfs-mkdir makes a new directory at a URI location that supports the creation of new directories.

OPTIONS

       The following options are supported:

       -p	       Create parents of the directory if needed

OPERANDS

       The following operands are supported:

       URI	       Specifies the location of the new directory in standard URI format.

EXAMPLES

       Example 1: Making a New Directory in the Home Directory

       example% gnomevfs-mkdir file:///home/user/newdir

ENVIRONMENT VARIABLES

       See environ(5) for descriptions of the following environment variables: NLSPATH.

EXIT STATUS

       The exit value 0 is returned regardless of success or failure.

FILES

       The following files are used by this application:

       /usr/bin/gnomevfs-mkdir	       Executable to make a new directory at a VFS location

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWgnome-vfs		   |
       +-----------------------------+-----------------------------+
       |Interface stability	     |Obsolete Volatile 	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       gnomevfs-cat(1), gnomevfs-copy(1), gnomevfs-info(1), gnomevfs-ls(1), gvfs-mkdir(1), attributes(5), environ(5)

NOTES

       Written by Stephen Browne, Sun Microsystems Inc., 2004.

SunOS 5.11							    14 May 2008 						 gnomevfs-mkdir(1)

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