Date: Tue, 17 Mar 2026 05:18:21 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 293871] procctl: add PROC_REAP_STATUS_EX for extended reaper subtree introspection Message-ID: <bug-293871-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=293871 Bug ID: 293871 Summary: procctl: add PROC_REAP_STATUS_EX for extended reaper subtree introspection Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: rikka.goering@outlook.de Created attachment 268877 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=268877&action=edit procctl: add extended reaper status query This patch adds a new procctl(2) operation, PROC_REAP_STATUS_EX, to provide extended introspection of existing reaper-managed process trees. The current PROC_REAP_STATUS interface remains unchanged for compatibility. The new PROC_REAP_STATUS_EX query returns additional information about the target process, including: - owning reaper PID - subtree identifier - real parent PID - whether the process is a direct child of its reaper - whether the process is itself a reaper - for reaper processes, the number of direct children and tracked descendants The patch also updates procctl(2) to document the new operation and its associated structure and flags. Motivation: The existing reaper infrastructure already tracks subtree relationships, but userland has only limited visibility into them. This change provides a small, opt-in extension for userland tools that need more detailed process-tree introspection. Testing: - Built and booted a kernel containing the change on FreeBSD-CURRENT. - Verified that ordinary processes report the expected init-rooted reaper state. - Verified that a process after PROC_REAP_ACQUIRE reports itself as a reaper. - Verified that direct children and grandchildren report the expected reaper and subtree values. - Included a small userland C test program as an attachment for reviewer use. This is intended as a focused introspection improvement; it does not modify the behavior of existing reaper operations. -- You are receiving this mail because: You are the assignee for the bug.home | help
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