HP B6960-90078 manual Environment, Variables

	Backup
	Pre- and Post-Exec Commands
Environment	The following environment variables are exported, and can be used in
Variables	the pre- and post-execscripts for an object on the system where the
	Disk Agent is running:
	BDACC
	The Disk Agent sets its exit code (0 is successful) to the BDACC
	environment variable. This variable can be checked in the post-exec
	script, thus making the post-execcommand dependent on the
	successful termination of the Disk Agent.
NOTE	If you perform a host backup, the pre-execscript is started once, before
	the first filesystem backup for the particular system, while the
	post-execscript is started after the backup. In this case, BDCACC
	cannot be exported because the variable is related to a single filesystem
	object, not to a whole client.
Key Points	Check the following key points before configuring the pre- and
	post-exec commands:
	✓ The pre- and post-execcommands for an object are executed during
	the preview of a backup. Therefore, you may want to preview your
	backup first and then add the pre- and post-execcommands, or
	check the PREVIEW environment variable in your scripts.
	✓ If a pre-execcommand for an object fails (returns a non-zero value),
	the backup status of the object is set to Aborted and the Disk Agent
	stops processing. No backup of the object exists.
	✓ If a post-execcommand fails (returns a non-zero value), the backup
	status of the object is set to Aborted. A backup of the object exists and
	data can be restored.
	✓ The pre- and post-execcommands should send some output to the
	Disk Agent at least every 120 minutes by default, or the backup of the
	object is aborted. This time period can be changed by modifying the
	SmDaIdleTimeout variable in the global options file.
	✓ Pre- and post-execcommands are handled in the same way as
	commands entered at the shell prompt. Special shell characters, such
	as the pipe () and the redirect symbols (>,<) are not allowed.
	✓ While the pre- and post-execcommands are running, the backup
	session cannot be aborted.

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