newgrp(1)						      General Commands Manual							 newgrp(1)

NAME

       newgrp - Changes primary group identification of a shell process

SYNOPSIS

       newgrp [-l] [group]

   Obsolete Synopsis
       newgrp [-] [group]

									  Note

       The  C shell has a built-in version of the newgrp command.  If you are using the C shell, and want to guarantee that you are using the com-
       mand described here, you must specify the full path /usr/bin/newgrp.  See the csh(1) reference page for a description of the built-in  com-
       mand.

STANDARDS

       Interfaces documented on this reference page conform to industry standards as follows:

       newgrp:	XCU5.0

       Refer to the standards(5) reference page for more information about industry standards and associated tags.

OPTIONS

       Changes	the  login  environment  to  what  would  be expected if the user logged in again.  Changes the login environment to what would be
       expected if the user logged in again.  (Obsolescent)

OPERANDS

       A group name from the group database or a non-negative numeric group ID. Specifies the group ID to which the real and effective	group  IDs
       will  be  set.  If group is a non-negative numeric string and exists in the group database as a group name, the numeric group ID associated
       with that group name will be used as the group ID.

DESCRIPTION

       The newgrp command changes the primary group identification of the current shell process to group.  You remain logged in  and  the  current
       directory is unchanged, but calculations of access permissions to files are performed with respect to the primary group ID.

       If  you	do not specify group, newgrp changes the group identification back to that specified for the current user in the /etc/passwd file.
       Only exported environment variables retain their values after you invoke newgrp.  Otherwise, variables with a default value  are  reset	to
       that default.

       If a password is required for the specified group, and you are not listed as a member of that group in the group database, you are prompted
       to enter the correct password for that group.  If you are listed as a member of that group, no password is requested.  If  no  password	is
       required for the specified group, only users listed as members of that group can change to that group.

       [Tru64  UNIX]  Only  a  user  with superuser authority can change the primary group of the shell process to one to which that user does not
       belong.

       [Tru64 UNIX]  When you invoke the newgrp command from a shell, the shell executes the command without forking a new process. Therefore, the
       shell you were using when you issued the newgrp command is unavailable after the newgrp command finishes.

NOTES

       [Tru64  UNIX]  The  newgrp command is also a built-in command for csh.  There is no convenient way to enter a password into the group data-
       base.  Use of group passwords is not encouraged because by their very nature they encourage poor security practices.

EXIT STATUS

       If newgrp succeeds in creating a new shell execution environment, whether or not the group identification  was  changed	successfully,  the
       exit status will be the exit status of the shell. Otherwise, a non-zero exit value is returned.

       The exit status of newgrp is generally inapplicable.

ENVIRONMENT VARIABLES

       The  following  environment  variables affect the execution of newgrp: Provides a default value for the internationalization variables that
       are unset or null. If LANG is unset or null, the corresponding value from the default locale is used.  If any of  the  internationalization
       variables  contain  an  invalid	setting,  the  utility behaves as if none of the variables had been defined.  If set to a non-empty string
       value, overrides the values of all the other internationalization variables.  Determines the locale for the interpretation of sequences	of
       bytes of text data as characters (for example, single-byte as opposed to multibyte characters in arguments).  Determines the locale for the
       format and contents of diagnostic messages written to standard error.  Determines the location of message catalogues for the processing	of
       LC_MESSAGES.

FILES

       Group names declared on the system Password file

SEE ALSO

       Commands:  csh(1), groups(1), id(1), login(1), Bourne shell sh(1b), POSIX shell sh(1p)

       Files:  group(4), passwd(4)

       Standards:  standards(5)

																	 newgrp(1)