permission problems with "at" under 3.01

[Mark Wright]

When an "at" command is run, it cannot access files for which the user
has group access - unless the user's primary group is that of the
file. 
  e.g.

  A file has permissions -rw-rw---- and has group  = groupA

  If a user (who doesn't own the file) wishes to run an "at" command
  that uses this file, she must have GroupA as her PRIMARY group, she
  can't just be in GroupA via /etc/group.

This appears to be a bug in atrun, as the script that at sets up can
be executed ok by the user, just not by atrun.

Has anyone seen this before, found a fix - we don't really want to
have to mess around with group permission.

We're running Ultrix 3.01 on Vaxstation IIs. We don't have the source
for atrun so can't patch it.
-- 

 Mark Wright.                    Dept. of Survey and Land Information,NZ.
 email: mark at dosli.govt.nz       phone: 64 4 710-380 ext 8688