https://nalar.dev/tags/prctl/ Recent content in Prctl on Nalar Hugo en-us Wed, 23 Sep 2026 00:00:00 +0000 https://nalar.dev/pr-set-pdeathsig-binds-child-notification-to-parent-thread-exit/ Wed, 23 Sep 2026 00:00:00 +0000 https://nalar.dev/pr-set-pdeathsig-binds-child-notification-to-parent-thread-exit/ <h1 id="pr_set_pdeathsig-binds-a-child-notification-to-parent-thread-exit">PR_SET_PDEATHSIG Binds a Child Notification to Parent Thread Exit</h1> <p><code>PR_SET_PDEATHSIG</code> lets a Linux process request a signal when the thread that created it terminates. The mechanism is narrow: it is a kernel-delivered notification tied to a parental relationship, not a general process-lifetime contract and not a guarantee that two processes terminate together.</p> <p>That distinction matters in supervisors, launchers, and helper processes. A child can react to loss of its creator without polling a PID, but the exact parent identity, setup timing, inheritance rules, and credential transitions define where the mechanism stops.</p>