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Exec hostcall timeouts

The runtime can optionally impose a wall-clock timeout on exec_spawn hostcalls. By default no timeout is applied; commands run until completion. To enforce an upper bound, set the environment variable RUNLOOP_EXEC_TIMEOUT_SECS to a positive integer number of seconds.

Special values:

  • RUNLOOP_EXEC_TIMEOUT_SECS=0 (or unset) disables any timeout explicitly.

Notes:

  • The timeout applies per exec_spawn invocation. When exceeded, the child is sent a kill signal and the hostcall returns EXEC_ESIGNAL.
  • This setting is process-wide for the daemon; there is currently no per-call or per-capability override.