Hojun-Cho
deaa777eb8
Path-shaped entrypoints now take str: open, tryopen, access, remove, mkdir, rmdir, mkdirs, stat, lstat, exists, execve (path arg only). Each cites its Hare source (ref/hare/os/*.ha, ref/hare/sys/+linux/ *.ha). New internal kpath(str) *u8 copies into module-level pathbuf: [4096]u8 and NUL-terminates; mirrors ref/hare/sys/+linux/syscalls.ha:25,53. Non-reentrant — graduates with thread story. mkdirs flattens to one kpath at entry then walks pathbuf invoking raw SYS_mkdir to avoid nested kpath clobber. One Hare divergence at kpath: ships *u8 with nil ENAMETOOLONG sentinel instead of (*const u8 | errno). Reason: wwstage over-allocates 1-word-payload tagged returns to 24B (cstage emits 16B); filed as follow-up. Repro at .ai/probe_tagged_return_pointer_payload.ww; graduates when fix lands. Each selfhost cmd grew a private pathstr(*u8) str (cstrlen + bs) for remaining *u8 path sites; w6l shares via obj.ww. Probe 7 in smoke updated. Tests 975/976/981 cover migrated entrypoints; 976 extended with two ENAMETOOLONG rows (-36 for stat, false for exists).