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Full Discussion: NFS Mount 16+ group Issue in AIX
Top Forums Shell Programming and Scripting NFS Mount 16+ group Issue in AIX Post 302792141 by pinnacle on Tuesday 9th of April 2013 06:36:47 PM
Old 04-09-2013
NFS Mount 16+ group Issue in AIX
Hi,
I am trying to read files from NFS mount. The ID with which I am trying to read is part of 16+ groups.

This is causing problem in doing change directory to the NFS mount directory.

I was able to get some code which does newgrp to change the default group so that I could change directories into NFS mount.
But as per the man pages of "newgrp". Looks like newgrp command invokes new shell everytime when it is called.
I am calling newgrp command as part of my korn shell. I would like to know, if calling it will impact my rest of the shell.
Looks like I could handle this issue by using here document.
But not sure if this is the right way. I have read other documentation to handle this NFS mount 16+ group situation but nothing seems to be helpful in my case (and not easy to understand documentation)
Help is appreciated.


Code:
 
/usr/bin/newgrp group1 << newgrp1
echo "Changing directory to /nfsmount/abc" 
cd /nfs/abc
 
/usr/bin/newgrp group2
cd /nfs/abc/def
 
cp /nfs/abc/def/test.txt /landingarea/app
if [ $? -eq 0 ];
then
   echo "copy successfull"
else
   echo "copy failed
fi
newgrp1

 

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LEARN ABOUT MINIX

sg

SG(1)                                                              User Commands                                                             SG(1)

NAME

       sg - execute command as different group ID

SYNOPSIS

       sg [-] [group [-c ] command]

DESCRIPTION

       The sg command works similar to newgrp but accepts a command. The command will be executed with the /bin/sh shell. With most shells you may
       run sg from, you need to enclose multi-word commands in quotes. Another difference between newgrp and sg is that some shells treat newgrp
       specially, replacing themselves with a new instance of a shell that newgrp creates. This doesn't happen with sg, so upon exit from a sg
       command you are returned to your previous group ID.

CONFIGURATION

       The following configuration variables in /etc/login.defs change the behavior of this tool:

       SYSLOG_SG_ENAB (boolean)
           Enable "syslog" logging of sg activity.

FILES

       /etc/passwd
           User account information.

       /etc/shadow
           Secure user account information.

       /etc/group
           Group account information.

       /etc/gshadow
           Secure group account information.

SEE ALSO

       id(1), login(1), newgrp(1), su(1), gpasswd(1), group(5), gshadow(5).

shadow-utils 4.5                                                    01/25/2018                                                               SG(1)
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