2 Ship 2 Harkinian (PPSA99621) imports fchmodat through std::filesystem::permissions and stops at start-up on main. Resolve AT_FDCWD and absolute paths as usual and join other relative paths to the directory descriptor like openat, accept 0 and AT_SYMLINK_NOFOLLOW, and mask the mode to 07777.
Porpoise (PPSA99764) stops on its weak chroot import (#3632, #4497).
Run 5 on main c2565f014, and again on a copy of that runtime:
FAIL: unresolved ELF import AKknh8Cx-V8 from libkernel_sys.prx
Its only call is in put_root_back (src/porpoise_jailbreak.cpp,
elripalda/Porpoise-Dolphin-Emulator-for-PS5 2ed1ab5a06995aa1): after a
jailbreak daemon has made the console's root its root and /app0 is
gone, it calls fchdir on the descriptor of "/" it opened at start, then
chroot("."), and checks the result. So it only ever puts back the root
it started in, and it does not use paths under any other root.
On top of the lookup errors of the previous commit, chroot now follows
FreeBSD 11.4 sys_chroot and pwd_chroot (8c639945, vfs_syscalls.c and
kern_descrip.c) for that case: a directory that is the guest root
("/", "/..", "." after fchdir to "/") succeeds without a change, since
fd_rdir would be set to the vnode it already is. The guest is taken
never to have changed its root, so with chroot_allow_open_directories 1
an open directory does not give EPERM. ENAMETOOLONG is added as in
pathconf, and a ".." through a file reports ENOTDIR instead of
escaping as a filesystem_error. Any other directory still throws: the
resolver's root and mount aliases are fixed, and no title is known that
needs a real new root.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Porpoise (PPSA99764) imports chroot (AKknh8Cx-V8) from
libkernel_sys.prx, not libkernel.prx, one reference. Predicted stop
once pathconf, the pthread_attr calls and ftrylockfile ahead of it are
covered (not a run):
FAIL: unresolved ELF import AKknh8Cx-V8 from libkernel_sys.prx
The NID is computed with tools/nid_names.py and matches aerolib.
Follows FreeBSD 11.4 sys/kern/vfs_syscalls.c sys_chroot and change_dir
(8c639945a44588f6cfdddfb057bb5aad88735da0) for a root caller up to the
lookup: EFAULT for a null path, ENOENT for an empty or missing one,
ENOTDIR for a file or a path through a file. A directory that is found
throws with the path named: the resolver's root is fixed and the mount
aliases (/app0, /savedata0) are host paths that do not move with it,
so it cannot be re-based, and a real chroot is not modelled. Nothing
shows that Porpoise calls it.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Porpoise 2.7 (PPSA99764) stops at load on main 0f863c10:
FAIL: unresolved ELF import oc98+zOImus from libkernel_sys.prx
oc98+zOImus is pathconf (tools/nid_names.py, aerolib.csv at
zecoxao/sce_symbols 2883963a). It is exported from libkernel_sys next to
link and readlink.
The lookup follows FreeBSD 11's kern_pathconf and namei (release/11.0.0,
671fb7df): links are followed, a path of 1024 bytes or more or a
component over 255 fails with ENAMETOOLONG, a missing path with ENOENT.
The values are the constants of FreeBSD 11's UFS ufs_pathconf, which
vop_stdpathconf shares where both answer. Names whose UFS value depends
on the mount, the kernel options or the page size, or on which UFS and
vop_stdpathconf disagree, throw; other names fail with EINVAL. The
console's filesystem values are unverified and recorded in
TechnicalDebt.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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