NEWGRP(1M-SysV)     RISC/os Reference Manual      NEWGRP(1M-SysV)



NAME
     newgrp - log in to a new group

SYNOPSIS
     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 per-
     formed 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 suc-
     cessfully or 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 PS1, PS2, 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,
     their PS1 will now be set to the default prompt string $.
     Note that the shell command export (see sh(1)) is the method
     to 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.  This is a way to exit the effect of an earlier
     newgrp command.

     If the first argument to newgrp is a -, the environment is
     changed to what would be expected if the user actually
     logged in again as a member of the new group.

     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 being a member of that group.

FILES
     /etc/group          system's group file
     /etc/passwd         system's password file

SEE ALSO
     login(1), sh(1) in the User's Reference Manual.
     group(4), passwd(4), environ(5) in the Programmer's Refer-
     ence Manual.





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NEWGRP(1M-SysV)     RISC/os Reference Manual      NEWGRP(1M-SysV)



ERRORS
     There is no convenient way to enter a password into
     /etc/group.  Use of group passwords is not encouraged,
     because, by their very nature, they encourage poor security
     practices.  Group passwords may disappear in the future.


















































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