[p3n1cillin]

What

Carries @nabilfp's clock_settime commit from nabilfp:feat/libkernel-chroot-clock-settime (53485d5a5, author kept), which they closed #4890 to free their PR slot and offered for anyone to carry. It follows FreeBSD 11.4 sys_clock_settime/kern_clock_settime for a privileged caller: EFAULT for a null time, and EINVAL for any clock other than CLOCK_REALTIME and for a negative tv_sec or a tv_nsec outside 0 to 999999999. A valid CLOCK_REALTIME request throws, since the host clock must not be set. The details are in the commit message and the debt entry.

Title evidence: PS5MC (PPSA99420, Kodi 22, catalog release) imports clock_settime (d7nUj1LOdDU). On current main with the open #4379 (chflags), #4374 (getpriority) and #4383 (sigpending), tools/import_audit.py lists it as the title's only absent import, so the loader stops on it:

FAIL: unresolved ELF import d7nUj1LOdDU from libkernel.prx

With this commit too, PS5MC loads and runs into Kodi's start-up, which then needs #5184, #5185 and #5186.

Tested

• PS5MC PPSA99420 on Windows 11 (MinGW GCC 15.2.0), on main 3faa9cb40 with feat(libkernel): carry chflags implementation #4379, feat(libkernel): implement getpriority for the guest process #4374, feat(libkernel): implement sigpending #4383 and feat(libkernel): report vm.overcommit through sysctlbyname #5184, feat(libkernel): report _SC_CLK_TCK through sysconf #5185 and fix(libkernel): handle FIOCLEX and FIONCLEX in ioctl #5186 (vm.overcommit, _SC_CLK_TCK, FIOCLEX): it loads, starts Python, finds its add-ons and the Estuary skin, creates its GUI on the ps5 windowing system, and runs for the whole 90 s run. Without this commit it does not load.
• guest_freebsd_clocks (from the commit) and all 125 libkernel tests pass on Windows; python tools/check_conventions.py --base origin/main passes. The commit applies to current main without changes.

Checklist

• Based on current main; no other open PR implements the same functions
• One topic per PR; follow-ups go in a new PR
• No comments in code except technical debt
• Unimplemented paths throw (NotImplemented_nid_no_patch); silent stubs are listed under Silent stubs in their library's technical debt file
• No notes, investigation .md files or images added to the repository (attach them to this PR)
• New third-party code is a submodule built from source
• Generic behaviour, not specific to one title
• Depends on: none to build; PS5MC also needs feat(libkernel): carry chflags implementation #4379, feat(libkernel): implement getpriority for the guest process #4374 and feat(libkernel): implement sigpending #4383 to load
• Unblocks: PS5MC (PPSA99420), part of libkernel: getpriority, chflags, chroot and clock_settime are absent (PS5MC, Porpoise); branch ready #3632
• AI-assisted: yes

🤖 Generated with Claude Code

[github-actions]

Progress report (91ed4ce → ae9978a)

➖ System libraries: 88.04% (+0.0%, +1 implemented functions)

✅ 1 implemented

Library	Name
libkernel	clock_settime_nid_postfix

[adriadam10]

Checked against FreeBSD 11.4 sys_clock_settime/kern_clock_settime: EFAULT for a null time, EINVAL for non-CLOCK_REALTIME, negative tv_sec or out-of-range tv_nsec, all match; a valid request throws and the debt entry documents it. Built and ran libs + libkernel ctest (146/146), guest_freebsd_clocks fails to link without the change and passes with it. Merging once the full build is green.

[github-actions]

Other open pull requests touch the same code. Merging one will break the other, or both implement the same thing. If this one builds on them, list them in Depends on.

Pull request	Conflicting files (lines on main)	Same exports	Same new files
#4374	docs/dev/debt/libkernel.md L168
#4379	docs/dev/debt/libkernel.md L168
#4725	docs/dev/debt/libkernel.md L168
#4968	docs/dev/debt/libkernel.md L168
#5096	core/libs/tests/GuestFreebsdClocks.cpp L6, L207, L210-211

[p3n1cillin]

Linux run: Ubuntu in WSL2, GCC 15.2.0, Ninja Release, BUILD_TESTING=ON, full build of a local test head 838d4fd85. That head is main 3faa9cb40 with this PR, my other open libkernel PRs (#5013, #5061, #5078, #5098, #5183–#5187, #5191) and the open PRs the catalog titles need (#4377, #4379, #4374, #4383, #3798, #4467, #4863, #4105). All 123 libkernel and 69 libc tests pass, including guest_system_configuration, guest_getrlimit, guest_kernel_fcntl, guest_freebsd_clocks, guest_kernel_sys and guest_filesystem. Not built alone on Linux; no title run on Linux.