[LU-6080] Posix copytool should unregister FIFO on signal

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.7.0
• Environment: All
• Severity: 3
• Assignee: Bruno Faccini (Inactive)
• Reporter: Bruno Faccini (Inactive)

Description

Original text/report from J.Nemeth (SGI) :

If the ct_run() routine (copytool daemon) terminates normally, it calls llapi_hsm_unregister_event_fifo() as well as llapi_hsm_copytool_unregister(). If the daemon is terminated via signal, the signal handler calls llapi_hsm_copytool_unregister(), but does NOT call llapi_hsm_unregister_event_fifo().

This leaves the FIFO file in place, and any subsequent invocation of the copytool with -f and the same FIFO path will fail to open the FIFO file with an EEXIST error.

The signal() handler routine should call llapi_hsm_unregister_event_fifo() the same way that ct_run() does on normal termination.