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Full Discussion: Can't do: su $user
Top Forums Shell Programming and Scripting Can't do: su $user Post 302434615 by methyl on Saturday 3rd of July 2010 09:14:06 PM
Old 07-03-2010
I can see issues with the input stream from "while" clashing with reads from each terminal session.

Code:
I need a script that first creates a list of all user in the system and then changes to each user to set some system settings.

We must assume that you are logged in as "root" before starting this exercise.

It is not clear whether you wish to run a program while in the environment of each user or just to edit a flat file owned by that user in their respective account. i.e. Do you need the full user environment at the time of the edit?

Personally I would write a script to write a script, then execute that script. This method avoids the input from the while loop being read in error.
 

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SIEVESHELL(1)						User Contributed Perl Documentation					     SIEVESHELL(1)

NAME
sieveshell - remotely manipulate sieve scripts SYNOPSIS
sieveshell [--user=user] [--authname=authname] [--realm=realm] [--exec=script] server[:port] sieveshell --help DESCRIPTION
sieveshell allows users to manipulate their scripts on a remote server. It works via MANAGESIEVE, a work in progress. The following commands are recognized: list list scripts on server. put <filename> upload script to server. get <name> [<filename>] get script. if no filename display to stdout delete <name> delete script. activate <name> activate script. deactivate deactivate all scripts. OPTIONS
-u user, --user=user The authorization name to request; by default, derived from the authentication credentials. -a authname, --authname=authname The user to use for authentication (defaults to current user). -r realm, --realm=realm The realm to attempt authentication in. -e script, --exec=script Instead of working interactively, run commands from script, and exit when done. REFERENCES
[MANAGESIEVE] Martin, T.; "A Protocol for Remotely Managing Sieve Scripts", draft-ietf-managesieve-03.txt, Mirapoint, Inc.; May 2001, work in progress. AUTHOR
Tim Martin <tmartin@mirapoint.com>, and the rest of the Cyrus team <cyrus-bugs@andrew.cmu.edu>. perl v5.16.3 2014-06-10 SIEVESHELL(1)
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