Max groups at 32?

[Austin Gonyou]

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I'm not sure if this is a Linux capabilities problem, a PAM problem, or
what, but I've noticed that If I add a user to > 32 groups...that user
cannot access anything in a directory owned by a group > the 32nd group.

Has anyone else experienced this?

Here is a sample script to help troubleshoot if you're interested:

#!/bin/bash
x=3D34;
useradd testuser
while [ ! $x -lt 1 ]
  do groupadd group$x
     gpasswd -a testuser group$x
     x=3D$(( $x - 1 ))
done

groups
read=20
printf "press any key..."
groups testuser
printf "press any key..."
read
mkdir /testdir
chown root:group1 /testdir
chmod 770 /testdir
su - testuser -c "ls /testdir"
printf "press any key..."
read
userdel -r testuser

If all has gone properly, and group1 is *not* in the first groups
listing, (not "groups testuser"), then the user will not be able to even
ls /testdir, and you'll get permission denied.=20

Please advise, if you can.
TIA.

--=20
Austin Gonyou
Systems Architect, CCNA
Coremetrics, Inc.
Phone: [phone]
email: [e-mail]

"One ought never to turn one's back on a threatened danger and=20
try to run away from it. If you do that, you will double the danger.=20
But if you meet it promptly and without flinching, you will=20
reduce the danger by half."
Sir Winston Churchill

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