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Top Forums Shell Programming and Scripting Scripting neophyte needs file manipulation assistance Post 302350652 by LambdaCalculus on Friday 4th of September 2009 12:50:13 PM
Old 09-04-2009
Scripting neophyte needs file manipulation assistance

I need to write two shell scripts for an rsync backup solution. The first script will copy all backed up files into a folder named after the original folder, plus a date stamp (so e.g. if the original folder name is 'foo' and is backed up on the 10th of September, then the backup folder will be 'foo0910'.)

The second script will monitor the number of backed up folders created, and will automatically delete the oldest folder after seven are created. Thus, there will always be seven backups, with the oldest always deleted to make room for the newest.

While I know it's a simple task to write both scripts (or even combine them as one), I'm not very good at scripting yet and am looking for a little advice on how best to write the script. These scripts will be running on our rsync server, so I only have the most basic of commands to work with; the commands I have at my disposal are dd, cp, ls, mkdir, pwd, chmod, chgrp, ln, mv, rm, rmdir, touch, tail, groups, id, passwd and quota
 
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rmf(1)							      General Commands Manual							    rmf(1)

NAME
rmf - remove folder (only available within the message handling system, mh) SYNOPSIS
rmf [+folder] [-help] [-[no]interactive] OPTIONS
Prints a list of the valid options to this command. Asks for confirmation before deleting a folder. By default, rmf deletes a folder and its messages without asking for confirmation. If you specify the -interactive option, rmf asks if you are sure before deleting the folder. You are advised to use this option, since when rmf deletes a folder its contents are lost irretrievably. DESCRIPTION
The rmf command removes all of the messages within the current folder, and then removes the folder itself. If there are any files within the folder which are not part of MH, they are not removed, and an error message is displayed. You can specify a folder other than the current folder by using the +folder argument. If you do not specify a folder, and rmf cannot find the current folder,rmf asks you whether you want to delete +inbox instead. If the current folder is removed, it makes +inbox current. Note that the rmf command irreversibly deletes messages that do not have other links, so use it with caution. If the folder being removed is a sub-folder, the parent folder becomes the new current folder, and rmf tells you that this has happened. This provides an easy mechanism for selecting a set of messages, operating on the list, then removing the list and returning to the current folder from which the list was extracted. Using rmf to delete a read-only folder deletes the private sequence and current message information from the file, without affecting the folder itself. If you have sub-folders within a folder, you must delete all the sub-folders before you can delete the folder itself. PROFILE COMPONENTS
Path: To determine the user's Mail directory EXAMPLES
This example shows how rmf asks for confirmation when the -interactive option is used: % rmf -interactive +test Remove folder "test"? y FILES
The user profile. SEE ALSO
rmm(1) rmf(1)

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