newgrp(1) [suse man page]

newgrp(1)						      General Commands Manual							 newgrp(1)

NAME

       newgrp -  change effective group ID sg - execute command with different group ID

SYNOPSIS

       newgrp [-l] [group]
       sg group -c command

DESCRIPTION

       The  newgrp  command changes the user's real and effetive group ID by replacing the current shell with a new shell. A new shell is launched
       even if an error occours.

       A password is requested if the group has a password and the user is not listed in the group file as being a member of that group. The pass-
       word can be changed with the gpasswd(1) command.

       If the new effective group ID is not in the supplementary group list, newgrp will add the new group ID to the supplementary list, too.

       With  no  operands  and options, newgrp changes the user's group IDs (real and effective) back to the group specified in password and group
       file.

       The sg command works like the newgrp command, except that it executes the given command with /bin/sh and upon exit the group ID of the cur-
       rent shell is not changed.

OPTIONS

       -l, --login
	      reinitialize the environment as if the user logged in.

       --help Print a help list.

       -u, --usage
	      Print a short usage message.

       -v, --version
	      Print program version.

SEE ALSO

       gpasswd(1), group(5), passwd(1), passwd(5), su(1)

AUTHOR

       Thorsten Kukuk <kukuk@suse.de>

pwdutils							    April 2004								 newgrp(1)

NEWGRP(1)						    BSD General Commands Manual 						 NEWGRP(1)

NAME

     newgrp -- change to a new group

SYNOPSIS

     newgrp [-l] [group]

DESCRIPTION

     The newgrp utility creates a new shell execution environment with modified real and effective group IDs.

     The options are as follows:

     -l      Simulate a full login.  The environment and umask are set to what would be expected if the user actually logged in again.

     If the group operand is present, a new shell is started with the specified effective and real group IDs.  The user will be prompted for a
     password if they are not a member of the specified group.

     Otherwise, the real, effective and supplementary group IDs are restored to those from the current user's password database entry.

EXIT STATUS

     The newgrp utility attempts to start the shell regardless of whether group IDs were successfully changed.

     If an error occurs and the shell cannot be started, newgrp exits >0.  Otherwise, the exit status of newgrp is the exit status of the shell.

SEE ALSO

     csh(1), groups(1), login(1), sh(1), su(1), umask(1), group(5), passwd(5), environ(7)

STANDARDS

     The newgrp utility conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY

     A newgrp utility appeared in Version 6 AT&T UNIX.

BUGS

     Group passwords are inherently insecure as there is no way to stop users obtaining the crypted passwords from the group database.	Their use
     is discouraged.

BSD
								   May 23, 2002 							       BSD