02-28-2018
Andrew, Thanks for the inputs. I was talking about shell scripts. I have to login manually as USERA, USERB, USERC, ... USERn and run bunch of processes/scripts. For every user, I have a script to check and start up programs if not running.
What I am trying to accomplish here is to avoid the logging in part.! Instead of logging in as n number of users, I just want to login as 1 user (let's say USER) and run 1 script to startup all the scripts that are required for n number of users. Catch is that the script should be executed as the user itself. For example, USERA has usera.sh script to start all the required programs. If I trigger start_all_users.sh from USER, it should trigger usera.sh as USERA.
Will setuid help in this case?
Thanks,
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LEARN ABOUT DEBIAN
setuid
SETUID(1) General Commands Manual SETUID(1)
NAME
setuid - run a command with a different uid.
SYNOPSIS
setuid username|uid command [ args ]
DESCRIPTION
Setuid changes user id, then executes the specified command. Unlike some versions of su(1), this program doesn't ever ask for a password
when executed with effective uid=root. This program doesn't change the environment; it only changes the uid and then uses execvp() to find
the command in the path, and execute it. (If the command is a script, execvp() passes the command name to /bin/sh for processing.)
For example,
setuid some_user $SHELL
can be used to start a shell running as another user.
Setuid is useful inside scripts that are being run by a setuid-root user -- such as a script invoked with super, so that the script can
execute some commands using the uid of the original user, instead of root. This allows unsafe commands (such as editors and pagers) to be
used in a non-root mode inside a super script. For example, an operator with permission to modify a certain protected_file could use a
super command that simply does:
cp protected_file temp_file
setuid $ORIG_USER ${EDITOR:-/bin/vi} temp_file
cp temp_file protected_file
(Note: don't use this example directly. If the temp_file can somehow be replaced by another user, as might be the case if it's kept in a
temporary directory, there will be a race condition in the time between editing the temporary file and copying it back to the protected
file.)
AUTHOR
Will Deich
local SETUID(1)