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lib/os+selfhost: *u8→str path migration (#23)

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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).
This commit is contained in:
Hojun-Cho
2026-05-16 23:36:41 +09:00
parent 08ac5149e8
commit deaa777eb8
19 changed files with 963 additions and 451 deletions
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8
lib/temp/temp.ww
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@@ -186,7 +186,9 @@ export fn named(outfd: *i32, outpath: *str,
};
for (true) {
pathlen = makenamed(dir);
let fd: i32 = os.open(&pathbuf[0], flags, perm);
let bs: str;
bs.ptr = &pathbuf[0]; bs.len = pathlen;
let fd: i32 = os.open(bs, flags, perm);
if (fd >= 0) {
*outfd = fd;
let p: str;
@@ -227,7 +229,9 @@ export fn file(iomode: mode, perm: i32) (i32 | os.oserror) = {
export fn dir() str = {
for (true) {
pathlen = makedir();
let r: i32 = os.mkdir(&pathbuf[0], 448i32); // 0o700
let bs: str;
bs.ptr = &pathbuf[0]; bs.len = pathlen;
let r: i32 = os.mkdir(bs, 448i32); // 0o700
if (r >= 0) {
let p: str;
p.ptr = &pathbuf[0];