Verify run-token ownership before signaling a POSIX process group.
Process IDs and group IDs can be reused. REA therefore re-reads every live
member's environment immediately before signaling and fails closed if any
member cannot be inspected or lacks the per-capture run token.
Verify run-token ownership before signaling a POSIX process group.
Process IDs and group IDs can be reused. REA therefore re-reads every live member's environment immediately before signaling and fails closed if any member cannot be inspected or lacks the per-capture run token.