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rpjday wrote:
> i'm writing a chapter on user and group management in linux,
>and was just about to mention the "newgrp" command, when i read
>both the man and info page and was totally confused.
>
> reads the man page (in part):
>
> ... the current directory is unchanged, but calcula
> tions of access permissions to files are performed with
> respect to the new group ID.
>
> am i just misreading the man page, or has the functionality
>of "newgrp" changed dramatically while i wasn't looking?
At best, I'd say the man page is badly worded. You're right, file
*access* rights are determined by the groups of which you are a
member, which newgrp doesn't alter, but ownership of *new* items will
depend on your (current) primary group.
The Solaris man page for newgrp is much clearer:
The newgrp command logs a user into a new group by changing
a user's real and effective group ID. The user remains
logged in and the current directory is unchanged. The execu-
tion of newgrp always replaces the current shell with a new
shell, even if the command terminates with an error (unknown
group).
It goes on to explain that a subshell is spawned, that only exported
variables will be inherited, how group passwords work and how to set
them, blah blah ... none of that is discussed in the (very brief and
un-useful) man page on my Red Hat system.
- -d
- --
David Talkington
http://www.spotnet.org
PGP key: http://www.prairienet.org/~dtalk/dt000823.asc
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