[LU-13981] tests should be consistent in use of "truncate"

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.14.0
• Assignee: Neil Brown (Inactive)
• Reporter: Neil Brown (Inactive)

Description

Some tests uses $TRUNCATE to truncate a file.  This explicitly find .../lustre/tests/truncate.

Other tests use "truncate" and assume it is the same program.

One test (sanity 399b) uses "truncate -s", which assumes /usr/bin/truncate.

I'm not really sure how all this works... test_399b fails for me.

The tests should be consistent in which truncate program is used, and how it is called.