Patch-ID# 100320-01
Keywords: nets, deletes, snap, user, add
Synopsis: SunOS4.0.2: Snap has problems adding or deleting users on large networks
Date: 18-Jun-91
 
SunOS release: SunOS 4.0.2
 
Unbundled Product:
 
Unbundled Release:
 
Topic: Snap
 
BugId's fixed with this patch: 1034627

Architectures for which this patch is available: sun386

Patches which may conflict with this patch:|>filled in by the find_conflict program<|

Obsoleted by:

Problem Description:

 The fix for this requires a new libezdb.1.0.  The fix here corrects
the problem of snap incorrectly reporting that the add user operation
has failed.  The cause of the bug was due to an insufficient
timeout between SNAP and the NIS master.  This timeout (5 minutes) would
occur on large networks with many NIS slaves and big NIS maps.  For sites
in which the timeout is insufficient, an internal variable can be
patched via adb.

INSTALL:

1.  Make sure snap is not running by exiting the program.

2.  Become superuser
 
        % su root
 
3.  Remount /usr so it is writable.

        # mount -o remount,rw /usr
 
4.  Change the current directory to /usr/lib
 
        # cd /usr/lib
 
5.  Save the old copy of libezdb.so.1.0
 
        # mv libezdb.so.1.0 libezdb.so.1.0.org
 
6.  Install the libezdb.so.1.0 library in /usr/lib
 
        # bar xvf /dev/rfd0c
 
7.  The old and new libraries have the same name (libezdb.so.1.0), so do
    not be concerned about this.  Verify that the library you extracted from
    the media is correct.

        # sum libezdb.so.1.0
          56791    98         <-- If these numbers don't match what is
                                  printed out when you run the sum command,
                                  then the library has been corrupted.
                                  Do not install the library in this case.
 
 
You can now start up snap.  It will use the new /usr/lib/libezdb.so.1.0.
 
Steps to change the timeout:
 
1.  Make sure snap is not running by exiting the program.
 
2.  Become superuser
 
        % su root
 
3.  Remount /usr so it is writable.
 
        # mount -o remount,rw /usr
 
4.  Change the current directory to /usr/lib
 
        # cd /usr/lib

5.  Use adb to increase the amount of time snap waits for the NIS update
    to complete.
 
        # adb -w /usr/lib/libezdb.so.1.0
        ezdb_commit_timeout?W <value>
        $q
 
        Note that the value must be specified as a hex value, in seconds.
        For example,
        ezdb_commit_timeout?W 0x12c     # sets timeout to 300 seconds (5 min)
        ezdb_commit_timeout?W 0x258     # sets timeout to 600 seconds (10 min)
        ezdb_commit_timeout?W 0x384     # sets timeout to 900 seconds (15 min)
 
        To print the value in decimal
        ezdb_commit_timeout?D
 
Note:   The timeout has not been tested beyond 15 minutes.  Although the number        is limited to 32 bits, there's no way we can tell what else might
        break if values greater than 0x384 are used.  The testing was not
        extensive, so we can't guarantee that even 15 minutes is a safe maximum.
        Use large values with caution.