MAILASM(8)                  Legato NetWorker 4.0                  MAILASM(8)


NAME
       mailasm - NetWorker module for saving and recovering mailboxes

SYNOPSIS
       mailasm [standard-asm-arguments]

DESCRIPTION
       The mailasm is a standard, external ASM (Application Specific Module)
       that assists in the saving and recovery of UNIX mailbox files.

       See uasm(8) for a general description of ASM's and the [standard-asm-
       arguments].  It is intended that mailasm be invoked by uasm during
       save(8) or recover(8) operations.

       Actions performed by mailasm, specific to the UNIX mail mailbox con­
       ventions during a save are:

       Save decision:
              The decision to save a file is based on the file's modify time
              as opposed to the normal convention based on the file's change
              time (see stat(2) for a detailed discussion of file
              attributes).

       Locking conventions:
              When a file is saved, this ASM uses the same locking conven­
              tion that the mail system's writers and readers use in order
              to get a consistent copy of the mailbox.

       File access time reset:
              After a mailbox's data has been saved, this ASM resets the
              mailbox's access time and modify time back to their pre-save
              values.  Note that this reset causes the file's change time to
              be updated; this necessitates the first action described
              above.

       No special actions are taken by mailasm during file recovery.

       The net effect of this ASM prevents mail reading (or mailbox stat­
       ting) programs from erroneously concluding that a user has no new
       mail after the NetWorker save operation has read and backed up the
       user's mailbox file data.

EXAMPLE
       To install the mailasm, the system administrator should create a
       directive file /var/spool/mail/.nsr with the following contents:

              mailasm: *

       This causes all mailbox files to be saved in the manner described
       above.

FILES
       /var/spool/mail   Mailbox directory.




Licensed material--property of copyright holder(s)                         1

MAILASM(8)                  Legato NetWorker 4.0                  MAILASM(8)


       /var/spool/mail/.nsr
                         The directive file that causes mailasm to be
                         invoked on all mailbox files.

SEE ALSO
       mail(1), stat(2), nsr(5), recover(8), save(8), uasm(8)



















































Licensed material--property of copyright holder(s)                         2