epics-base/documentation/new-notes/PR-558.md

New afterIocRunning IOC Shell Command Added

This release incorporates PR #558 which added a new IOC shell command afterIocRunning. This command allows startup scripts to schedule arbitrary commands to be executed automatically after the IOC initialization phase (iocInit).

afterIocRunning allows you to write better-structured IOC shell files to include in your startup scripts without tracking where iocInit is located (and how IOC is deployed) e.g.:

• to achieve the best maintainability (e.g. encapsulation of the context into one file),
• to improve writing boot sequences,
• to improve IOC startup flexibility and scripting capabilities,
• it replaces the community afterInit and doAfterIocInit IOC shell commands,
• community usage examples:
  • pf4filters.iocsh - enable/disable with a single comment (full description)
  • ALS-U autosave managment

Features

• Define commands that run after IOC initialization completes.
• Executes following iocInit and autosave initialization (important for proper PV configuration).
• Supports any valid IOC shell command as an argument.
• Example usages:
  • afterIocRunning "dbpf <PV> <VAL>"
  • afterIocRunning "date"
  • afterIocRunning "dbpf $(P)EvtClkSource-Sel 'Upstream (fanout)'"
  • afterIocRunning "dbpf $(P)Enable-Sel Enabled"