newgrp(1)
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newgrp Command
log in to a new group
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SYNTAX
newgrp [-] [ group ]
DESCRIPTION
Newgrp changes a user's group identification. The user remains
logged in and the current directory is unchanged, but
calculations of access permissions to files are performed with
respect to the new real and effective group IDs. The user is
always given a new shell, replacing the current shell, by newgrp,
regardless of whether it terminated successfully or terminated
due to an error condition (i.e., unknown group).
Exported variables retain their values after invoking newgrp;
however, all unexported variables are either reset to their
default value or set to null. System variables (such as PATH,
MAIL, and HOME), unless exported by the system or explicitly
exported by the user, are reset to default values. For example,
a user has a primary prompt string (PS1) other than $ (default)
and has not exported PS1. After an invocation of newgrp ,
successful or not, the user's PS1 is set to the default prompt
string $. Note that the shell command export (see sh(1)) and the
C shell command setenv (see csh(1)) export variables so that they
retain their assigned value when invoking new shells.
With no arguments, newgrp changes the group identification back
to the group specified in the user's password file entry.
If the first argument to newgrp is a -, the environment is
changed to what would be expected if the user actually logged in
again.
A password is demanded if the group has a password and the user
does not, or if the group has a password and the user is not
listed in /etc/group as a member of that group.
FILES
/etc/group System's group file
/etc/passwd System's password file
DG/UX 4.00 Page 1
Licensed material--property of copyright holder(s)
newgrp(1)
SEE ALSO
login(1), sh(1), csh(1).
group(4), passwd(4), environ(5) in the Programmer's Reference for
the DG/UX System
BUGS
There is no convenient way to enter a password into /etc/group.
Use of group passwords is not encouraged, since they encourage
poor security practices. Group passwords may disappear in the
future.
DG/UX 4.00 Page 2
Licensed material--property of copyright holder(s)