x is a user account of group X
y is a user account of group Y

How can x run a shell script to create a file in y's directory with
file owner set to y and group set to Y ? Thanks.

-- peter

kanpeter@graduate.hku.hk wrote:
> x is a user account of group X
> y is a user account of group Y
>
> How can x run a shell script to create a file in y's directory with
> file owner set to y and group set to Y ? Thanks.

No way.

Only y and root can do that.
And I am deliberately ignoring tools like sudo, it's just too messy
to abuse a tool to achieve something that you probably don't really need.

But I am sure that there is a good way to solve the underlying problem,
if you care to tell us what you want to achieve.

Yours,
Laurenz Albe

kanpeter@graduate.hku.hk wrote:
> x is a user account of group X
> y is a user account of group Y
>
> How can x run a shell script to create a file in y's directory with
> file owner set to y and group set to Y ? Thanks.
>


<dangerously-insecure>
have a cron job or daemon running with root priv that looks at the
contents of a trigger file (say, in /tmp), creates files with ownership
and privs set according to entries in that trigger file, then deletes
the trigger file?
</dangerously-insecure>


> -- peter

kanpeter@graduate.hku.hk wrote:
> x is a user account of group X
> y is a user account of group Y
>
> How can x run a shell script to create a file in y's directory with
> file owner set to y and group set to Y ? Thanks.

You'll not want to do this. Think different.
Use the "mailbox" scheme. Make a /path/to/mailbox
and set a "chmod 770 /path/to/mailbox". Put x and y
to a common Z group.
chgrp Z /path/to/mailbox

>
> -- peter
>