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Full Discussion: File Ownership Change
Top Forums Shell Programming and Scripting File Ownership Change Post 302526507 by vbhonde11 on Tuesday 31st of May 2011 06:14:08 PM
Old 05-31-2011
File Ownership Change
Hi,

I have several directories under an upload directory where differnt users upload their files (with exxactly the same file name every week) using their own user ids.

There is a requirement that once any user uploads the file I have to clean that file and remove extra whitespaces and unreadable characters.

I have a cleanup script which runs under an admin user (basically a group owner user say xyz) account which has access to all these directories.

Once I do the clean up the owner of the uploaded file gets changed to admin user and then next time when any user tries to upload their file again they get permission denied error as the file with same name exist with different owner.

Question is
1. How to give access to the individual user to over write the file own by the admin user or
2. How not to change the owner of the file to the admin user while cleaning up the file.

Note: All the users are part of the same group whose owner is the admin user mentioned above. i.e. in the /etc/group file all the user ids who uploads the file are listed under the group id

Code:
 
xyz:!:212:userid1,userid2,userid3

my cleanup script runs as user xyz and the ownership gets changed to xyz and then the userid1, userid2 and userid3 are not able to upload their files.

the owner of the upload directory is userid1

Code:
 
abc        100      5/21/2011       rwxrwxr_x         userid1

before upload

HTML Code:
abc.csv   100      5/21/2011       rw_r__r__         userid1
after upload and clean up

HTML Code:
abc.csv   100      5/21/2011       rw_r__r__         xyz
Next time when user userid1 tries to upload gets permission denied error.

Hope I am not confusing here.
Last edited by vbhonde11; 05-31-2011 at 07:50 PM.. Reason: added example
 

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LEARN ABOUT DEBIAN

backup-manager-upload

BACKUP-MANAGER-UPLOAD(8)				       backup-manager-upload					  BACKUP-MANAGER-UPLOAD(8)

NAME

       backup-manager-upload - Multiprotocol uploader for backup-manager.

SYNOPSIS

       backup-manager-upload [options] date

DESCRIPTION

       backup-manager-upload will upload all the archives generated on the given date to the specified host with either ftp or scp.  It's also
       possible to use this program for uploading data to an Amazon S3 account.  Some metadates are available like "today" or "yesterday".

REQUIRED ARGS

       --mode=transfer-mode
	   Select the transfer mode to use : ftp, scp, or s3.

       --host=hostname1,hostname2,...,hostnameN
	   Select a list of remote hosts to connect to.

       --user=username
	   Select the user to use for connection.

OPTIONAL ARGS

       --password=password
	   Select the ftp user's password (only needed for ftp transfers).

       --key=path_to_private_key
	   Select the ssh private key file to use when opening the ssh session for scp transfer.  Obviously, this is only needed for scp transfer
	   mode.  If you don't specify a key file, the user's default private key will be used.

       --directory=directory
	   Select the location on the remote host where files will be uploaded.  Default is /backup/uploads.

       --bucket=bucket
	   Sets the bucket name for the Amazon S3 service backup into.

       --root=directory
	   Select the local directory where files are.	Default is /var/archives

       --gpg-recipient=gpg-recipient
	   Select the gpg public key for encryptiong the archives when uploading with the method ssh-gpg. This can be a short or long key id or a
	   descriptive name. The precise syntax is described in the gpg man page.

       --list
	   Just list the files to upload.

       --ftp-purge
	   Purge the remote directory before uploading files in FTP mode.

       --s3-purge
	   Purge the remote directory before uploading files in FTP mode.

       --ssh-purge
	   Purge the remote directory before uploading files in SSH mode.

       --verbose
	   Flag to enable verbose mode.

       date
	   Date pattern to select some files to upload, can be a valid date (YYYYMMDD) or 'today' or 'yesterday'.

ERROR CODES

       If something goes wrong during an upload, backup-manager-upload will exit with a non null value. In such a case every error messages are
       sent to STDERR.

       Here are the possible error codes:

       bad command line (wrong arguments) : 10
       FTP transfer failure : 20
       SCP transfer failure : 21
       S3 transfer failure : 22
       Unknown upload method: 23

SEE ALSO

       backup-manager(3)

AUTHORS

       Alexis Sukrieh - main code and design

       Brad Dixon - Amazon S3 upload method

       Jan Metzger - ssh-gpg upload method

perl v5.14.2							    2012-05-09						  BACKUP-MANAGER-UPLOAD(8)
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