CMakeLists.txt

@@ -51,12 +51,14 @@ option(AKBASIC_SANITIZE  "Build with ASan + UBSan"                           OFF
 # through: the dependencies set target and directory properties that their own
 # builds depend on.
 #
-# libakerror additionally namespaces its `mutation` target when embedded but not
+# All three dependencies now namespace both their `coverage` and their
-# its `coverage` target (deps/libakerror/CMakeLists.txt:194 vs :172), so a
+# `mutation` targets when embedded, so there is no custom-target collision left
-# coverage build collides on the `coverage` target and fails to configure at all.
+# to work around. libakerror was the last holdout -- it namespaced `mutation`
-# Rename the dependency's on the way past. Remove this once libakerror applies
+# but not `coverage`, and a coverage build collided on the bare name and failed
-# the same CMAKE_SOURCE_DIR test to `coverage` that it already applies to
+# to configure at all. 2.0.2 applies the same CMAKE_SOURCE_DIR test to both
-# `mutation` -- filed as libakerror issue #15.
+# (deps/libakerror/CMakeLists.txt:429-434), closing libakerror issue #15, and
+# the add_custom_target() shadow that renamed it on the way past is gone with
+# this comment.
 #
 # **Only one project in a tree may shadow add_test(), and this is that project.**
 # CMake exposes an overridden command as `_name` and chains exactly one level: a
@@ -86,14 +88,6 @@ function(set_property _scope)
   endif()
 endfunction()
 
-function(add_custom_target _name)
-  if(AKBASIC_SUPPRESS_ADD_TEST AND _name STREQUAL "coverage")
-    _add_custom_target(akerror_coverage ${ARGN})
-  else()
-    _add_custom_target(${ARGV})
-  endif()
-endfunction()
-
 add_subdirectory(deps/libakerror EXCLUDE_FROM_ALL)
 add_subdirectory(deps/libakstdlib EXCLUDE_FROM_ALL)
 if(AKBASIC_WITH_AKGL)

MAINTENANCE.md

@@ -68,12 +68,19 @@ the `akgl_*` or `aksl_*` entry point should look like, and what tests would cove
 decision, which is true of *changing* it and not of *reporting* it. Follow the prose-paragraph style of the entries already
 there. Growing the dependency to serve the interpreter is a wanted outcome, not a detour.
 
-It works. Four gaps were filed this way — text measurement, immediate-mode drawing, audio,
+It works. **Five** gaps were filed this way and all five landed upstream: text measurement,
-and a non-blocking keystroke read — and all four landed upstream as `akgl_text_measure`, the
+immediate-mode drawing, audio and a non-blocking keystroke read became `akgl_text_measure`,
-`akgl_draw_*` family, `akgl_audio_*` and `akgl_controller_poll_key`. `FILTER` is the one verb
+the `akgl_draw_*` family, `akgl_audio_*` and `akgl_controller_poll_key`; and the
-still blocked on a gap, and `DIRECTORY` is refused pending an `opendir`/`readdir` wrapper in
+directory-reading wrapper `DIRECTORY` was waiting on became `aksl_opendir`, `aksl_readdir`,
-`libakstdlib`. Both refuse at execution and say so, rather than being silently ignored: a
+`aksl_closedir` and `aksl_rewinddir` — `libakstdlib` issue #10, in the revision this tree
-program that asks for a low-pass filter and gets an unfiltered square wave has been lied to.
+pins.
+
+That leaves the two refusals in different positions, and the difference is worth keeping
+straight. **`FILTER` is the one verb still blocked on a gap** — there is no filter stage in
+`akgl_audio_*` to configure. **`DIRECTORY` is no longer blocked on anything**; it is simply
+unwritten, and its refusal says so rather than naming a wrapper that now exists. Both refuse
+at execution and say so, rather than being silently ignored: a program that asks for a
+low-pass filter and gets an unfiltered square wave has been lied to.
 
 ### The Go reference
 
@@ -156,10 +163,10 @@ guards every dependency with `if(NOT TARGET ...)`, so a top-level build must def
 `akerror::akerror` and `akstdlib::akstdlib` from `deps/libakerror` and `deps/libakstdlib`
 **before** `add_subdirectory(deps/libakgl)`, or the targets are declared twice.
 
-That order is load-bearing for a second reason: `deps/libakerror` is at **2.0.1**, whose 2.0.0
+That order is load-bearing for a second reason: `deps/libakerror` is at **2.0.2**, whose 2.0.0
 was a source and ABI break carrying an soname (`libakerror.so.2`). `libakstdlib` and `libakgl`
 must be compiled against that header, not a 1.x one, and an installed `libakerror.so.1` must
-not be picked up. The break is quiet if you get it wrong: `__akerr_last_ignored` became
+not be picked up. The break is quiet if you get it wrong: the context behind `IGNORE` became
 thread-local and `akerr_next_error()` now returns a context that already holds a reference, so
 a mixed build leaks pool slots or frees one twice rather than failing to link.
 
@@ -167,10 +174,47 @@ a mixed build leaks pool slots or frees one twice rather than failing to link.
 
 | Submodule | Version | soname | ABI rule | Version API |
 |---|---|---|---|---|
-| `deps/libakerror` | 2.0.1 | `libakerror.so.2` | major only | **none** — no version macro; `include/akbasic/error.h` feature-tests `AKERR_THREAD_SAFE` and `AKERR_EXIT_STATUS_UNREPRESENTABLE` instead |
+| `deps/libakerror` | 2.0.2 | `libakerror.so.2` | major only | **none** — no version macro; `include/akbasic/error.h` feature-tests `AKERR_THREAD_SAFE` and `AKERR_EXIT_STATUS_UNREPRESENTABLE` instead |
 | `deps/libakstdlib` | 0.2.0 | `libakstdlib.so.0.2` | **`MAJOR.MINOR` while major is 0** | `AKSL_VERSION_*`, `aksl_version()`, `AKSL_VERSION_CHECK()` |
 | `deps/libakgl` | 0.9.0 | `libakgl.so.0.9` | **`MAJOR.MINOR` while major is 0** | `AKGL_VERSION*`, `akgl_version()`, `AKGL_VERSION_AT_LEAST()` |
 
+**The `libakerror` row is what `project(akerror VERSION ...)` declares, and it disagrees with
+that library's own release notes**, which carry a "Release 2.0.3" section describing CI-only
+changes. The version the build stamps into the soname and into
+`akerrorConfigVersion.cmake` is 2.0.2; nothing consumers can observe says 2.0.3. Read the
+table as the ABI and the notes as the changelog, and do not "correct" this row to 2.0.3
+without the upstream `project()` bump to go with it. Reported as `libakerror` issue #38.
+
+#### What 2.0.2's `IGNORE` change costs, measured
+
+`IGNORE` now takes a *copy* of the context so the pool slot can be released, which fixes a
+real leak. The copy lives in the public header as a file-scope `static`:
+
+```c norun
+static AKERR_THREAD_LOCAL akerr_ErrorContext akerr_last_ignored;
+```
+
+`static` means one per translation unit, and `AKERR_THREAD_LOCAL` means each one is
+thread-local. `sizeof(akerr_ErrorContext)` is **37,296 bytes**, so:
+
+| Build | TLS segment of `build/basic` |
+|---|---|
+| libakerror 2.0.1 | none at all |
+| libakerror 2.0.2 | 1,417,248 bytes — **1.35 MiB**, per thread |
+
+38 copies × 37,296 accounts for the segment exactly; `readelf -sW build/basic` shows all 38.
+It scales with translation-unit count, not with anything about the program, and every thread
+a host game spawns pays it again — which is worth knowing in a tree that spent a release
+taking `akbasic_Runtime` from 10.75 MiB to 2.40 MiB.
+
+It also emits **84 `-Wunused-variable` warnings**, one per TU that includes `akerror.h`
+without using `IGNORE`. Nothing here builds with `-Werror`, so it is noise rather than a
+failure — but a consumer that does cannot include the header.
+
+**Both are `libakerror` issue #37 and neither is worked around here**, per the rule above: a
+one-line `extern` in the header and a definition in `src/error.c` fixes it upstream, and
+patching our copy would fork the submodule. Delete this subsection when it lands.
+
 For both 0.x libraries the soname carries `MAJOR.MINOR` deliberately: 0.1 and 0.2 are
 *different* ABIs, and both become major-only at 1.0. Do not read `0.1 → 0.2` as a compatible
 bump — both libraries have actually made that jump, so anything built against the 0.1 headers
@@ -196,16 +240,32 @@ precedes the build tree on the include path and a stray copy there would shadow
 one and pin every consumer. It publishes `AKGL_VERSION_AT_LEAST(major, minor, patch)` — the
 compile-time test `libakstdlib` could not write against `libakerror` — and `akgl_version()`.
 
-**Version-pinning in `find_package` is asymmetric, and that is deliberate.**
+**Version-pinning in `find_package` used to be asymmetric. It no longer is.**
 `find_package(akstdlib 0.1)` and `find_package(akgl 0.1)` both work; each ships a
-`ConfigVersion.cmake` at `SameMinorVersion`, mirroring its soname. `find_package(akerror 1.0)`
+`ConfigVersion.cmake` at `SameMinorVersion`, mirroring its soname. `libakerror` shipped
-**fails against a correct install**, because `libakerror` ships `akerrorConfig.cmake` and
+`akerrorConfig.cmake` and `akerrorTargets.cmake` but no `akerrorConfigVersion.cmake`, so any
-`akerrorTargets.cmake` but no `akerrorConfigVersion.cmake`. Ask for `akerror` unversioned. Its
+versioned request failed against a correct install and the advice here was to ask for
-floor is enforced instead by an `#error` feature-testing `AKERR_FIRST_CONSUMER_STATUS`, which
+`akerror` unversioned. That was `libakerror` issue #16 — closed — and `libakstdlib` issue #5,
-`akstdlib.h`, `akgl/error.h` and our own `include/akbasic/error.h` all carry — include any of
+which tracks the same fix from the other side and is still open only because nobody has shut
-them and you inherit the guard. The missing version file is filed in
+it. It has landed: `libakerror` now writes `akerrorConfigVersion.cmake` at
-`libakstdlib` issue #5 and `libakerror` issue #16; when it lands, add the `1.0` floor to the `find_dependency`
+**`SameMajorVersion`**, matching the soname's major-only rule, rather than the
-calls.
+`SameMinorVersion` the other two use to match theirs.
+
+Two things follow, and the second is the one that bites:
+
+- **A versioned request now works** — but the floor to ask for is **`2.0`**, not the `1.0`
+  this file used to say. `find_package(akerror 1.0)` fails *harder* than before: it is a
+  request for major 1 against a major-2 install, which `SameMajorVersion` correctly rejects.
+- **There is nothing in this repository to change.** `akbasic` reaches all three dependencies
+  by `add_subdirectory`, not `find_package`, and ships no CMake package config of its own —
+  so it has no `find_dependency` calls to add a floor to. The instruction that used to live
+  here was written for a consumer this project never became. It matters to anyone *installing*
+  these libraries and linking `akbasic` against the installed copies, which is why it is
+  recorded rather than deleted.
+
+The compile-time floor is unchanged and still the real guard: an `#error` feature-testing
+`AKERR_FIRST_CONSUMER_STATUS`, which `akstdlib.h`, `akgl/error.h` and our own
+`include/akbasic/error.h` all carry — include any of them and you inherit it.
 
 ### Embedding all three dependencies collides four ways
 
@@ -250,14 +310,19 @@ CTest names. `libakstdlib` still uses bare `test_<name>` targets. **Name every t
 this repo `akbasic_test_<name>`** — it costs nothing and it is the collision that actually
 stopped a build.
 
-**3. Duplicate custom targets.** `libakerror` namespaces its `mutation` target when embedded
+**3. Duplicate custom targets — fixed upstream, and the workaround is gone.** `libakerror`
-but **not** its `coverage` target, so any coverage-enabled top-level build fails with *"another
+used to namespace its `mutation` target when embedded but **not** its `coverage` target, so
-target with the same name already exists"*. We shadow `add_custom_target` and rename that one
+any coverage-enabled top-level build failed with *"another target with the same name already
-to `akerror_coverage` on the way past. `libakstdlib` (both targets) and `libakgl` (its
+exists"*. This project shadowed `add_custom_target` and renamed that one to
-`mutation` target) namespace themselves correctly. **The real fix is upstream in
+`akerror_coverage` on the way past, and recorded the real fix as `libakerror` issue #15: the
-`libakerror`** — the same `CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR` test it already
+same `CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR` test it already applied to
-applies to `mutation` — and it is filed as `libakerror` issue #15. Delete the
+`mutation`.
-workaround when it lands.
+
+That landed in 2.0.2. `libakerror` now picks `akerror_coverage` itself when embedded, so the
+shadow was dead code that could only ever fire on a name the dependency had stopped using —
+and it is deleted. All three dependencies namespace both targets correctly now, so **there is
+no custom-target collision left**; only collisions 1, 2 and 4 below are live. The heading says
+four because four is what a reader coming from the issue tracker will be looking for.
 
 **4. Stale build trees poison the coverage report.** See below; it is the reason for
 `cmake -S . -B build`.

README.md

@@ -138,12 +138,13 @@ API documentation builds with `doxygen Doxyfile`, into `build/docs/html`.
 Everything is a submodule; `git submodule update --init --recursive` gets all of it. There is
 nothing to install first.
 
-* [libakerror](https://source.starfort.tech/andrew/libakerror) 2.0.1 — TRY/CATCH-style error
+* [libakerror](https://source.starfort.tech/andrew/libakerror) 2.0.2 — TRY/CATCH-style error
   contexts. Every function that can fail returns one. 2.0.0 made it thread safe and broke the
   ABI; anything built against a 1.x header must be rebuilt rather than relinked.
 * [libakstdlib](https://source.starfort.tech/andrew/libakstdlib) 0.2.0 — libc wrappers that
   report through `libakerror`. String-to-number conversion goes straight to it, which is why
-  `VAL("garbage")` is an error rather than a silent `0`.
+  `VAL("garbage")` is an error rather than a silent `0`. Its public header now also pulls in
+  `<dirent.h>` and `<sys/stat.h>` for the directory and file-metadata wrappers.
 * [libakgl](https://source.starfort.tech/andrew/libakgl) 0.9.0 — **optional**, only for
   `-DAKBASIC_WITH_AKGL=ON`. Pulls in SDL3. Its soname carries `MAJOR.MINOR` while the major is 0,
   so rebuild rather than relink.

TODO.md

@@ -2339,9 +2339,9 @@ Dependency baseline:
 
 | Submodule | Version | Notes |
 |---|---|---|
-| `deps/libakerror` | 2.0.1 | Private ownership-enforced status registry. akbasic reserves 512–767 in `akbasic_error_register()`. Does not namespace its `coverage` target when embedded — worked around in our `CMakeLists.txt`. **2.0.0 is thread safe and an ABI break** (`libakerror.so.2`): `__akerr_last_ignored` is thread-local and `akerr_next_error()` returns an owned reference, neither of which fails to link when mismatched. **2.0.1 fixes an exit status that mattered more to this band than to any other** — see below. |
+| `deps/libakerror` | 2.0.2 | Private ownership-enforced status registry. akbasic reserves 512–767 in `akbasic_error_register()`. **2.0.0 is thread safe and an ABI break** (`libakerror.so.2`): the `IGNORE` context is thread-local and `akerr_next_error()` returns an owned reference, neither of which fails to link when mismatched. **2.0.1 fixes an exit status that mattered more to this band than to any other** — see below. **2.0.2** namespaces its embedded `coverage` target (issue #15 — our `add_custom_target` shadow is deleted), installs `akerrorConfigVersion.cmake` at `SameMajorVersion` (issue #16), fixes the `AKERR_USE_STDLIB=OFF` build, retires `PATH_MAX` for `AKERR_MAX_ERROR_FNAME_LENGTH`, and turns the `IGNORE` slot into a released copy — `__akerr_last_ignored` was an `extern` pointer and is now a per-TU `static akerr_last_ignored`. **That last one costs us 1.35 MiB of thread-local storage**: 38 translation units x 37,296 bytes, measured as the whole TLS segment of `build/basic`, where 2.0.1 produced no TLS segment at all. Filed upstream as libakerror issue #37, along with the 84 `-Wunused-variable` warnings it emits. Its `UPGRADING.md` describes a 2.0.3 that `project()` never stamped — libakerror issue #38, which is why the version above reads 2.0.2. |
-| `deps/libakstdlib` | 0.2.0 | soname `libakstdlib.so.0.2`. `AKSL_VERSION_CHECK()` asserted in `tests/version_check.c`. This release fixed all six confirmed defects the port was working around — see §1.9, where the bans are now lifted. |
+| `deps/libakstdlib` | 0.2.0 | soname `libakstdlib.so.0.2`. `AKSL_VERSION_CHECK()` asserted in `tests/version_check.c`. This release fixed all six confirmed defects the port was working around — see §1.9, where the bans are now lifted. Since then, and with no version bump: **directory wrappers landed** (`aksl_opendir`/`readdir`/`closedir`/`rewinddir`, issue #10) — the gap `DIRECTORY` was refused for, so that refusal now says only that the verb is unwritten; file-metadata wrappers landed; and `aksl_snprintf` keeps its `int *count` but now reports the *required* length on truncation rather than 0. Only read on success here, so nothing moved. |
-| `deps/libakgl` | 0.7.0 | soname `libakgl.so.0.7`. Owns status codes 256–260. Linked and tested under `-DAKBASIC_WITH_AKGL=ON`, which still defaults OFF so the core library and its whole suite build on a machine with no SDL. **0.3.0 closed every API gap this port had filed** — see §7 — so the four workarounds §3 used to list are gone. 0.4.0 was a leak-and-overread release that changed no public struct. **0.5.0 is the first that broke our source as well as our ABI**: it namespaced every exported symbol, so `akgl_render_bind2d` is `akgl_render_2d_bind`, `akgl_sprite_sheet_coords_for_frame` is `akgl_spritesheet_coords_for_frame`, the `renderer`/`camera`/`window` globals carry the prefix, and `_akgl_renderer`/`_akgl_camera` are `akgl_default_renderer`/`akgl_default_camera`. `include/akbasic/akgl.h` asserts the floor. **0.6.0 and 0.7.0 broke nothing here** — 0.6.0 is three arcade-physics fixes and a `physics.max_timestep` property this port does not use, and 0.7.0 reports failures `libakstdlib`'s wrappers were already catching and takes `libakerror` 2.0.1. The floor moved anyway, because deciding for ourselves which of libakgl's minor releases were really compatible is the judgement the soname exists to take away. |
+| `deps/libakgl` | 0.9.0 | soname `libakgl.so.0.9`. Owns status codes 256–262. Linked and tested under `-DAKBASIC_WITH_AKGL=ON`, which still defaults OFF so the core library and its whole suite build on a machine with no SDL. **0.3.0 closed every API gap this port had filed** — see §7 — so the four workarounds §3 used to list are gone. 0.4.0 was a leak-and-overread release that changed no public struct. **0.5.0 is the first that broke our source as well as our ABI**: it namespaced every exported symbol, so `akgl_render_bind2d` is `akgl_render_2d_bind`, `akgl_sprite_sheet_coords_for_frame` is `akgl_spritesheet_coords_for_frame`, the `renderer`/`camera`/`window` globals carry the prefix, and `_akgl_renderer`/`_akgl_camera` are `akgl_default_renderer`/`akgl_default_camera`. `include/akbasic/akgl.h` asserts the floor. **0.6.0 and 0.7.0 broke nothing here** — 0.6.0 is three arcade-physics fixes and a `physics.max_timestep` property this port does not use, and 0.7.0 reports failures `libakstdlib`'s wrappers were already catching and takes `libakerror` 2.0.1. **0.8.0 and 0.9.0 broke nothing here either** — 0.8.0 is the collision subsystem (`AKGL_ERR_COLLISION`, code 261, and the vendored `libccd` and `tg` submodules that come with it), and 0.9.0 is the `akgl_ui` subsystem (`AKGL_ERR_UI`, code 262, and vendored `clay`), which is what `src/ui_akgl.c` draws through. Both widen libakgl's reserved band from five codes to seven; the range map in `MAINTENANCE.md` carries it. The floor moved anyway, because deciding for ourselves which of libakgl's minor releases were really compatible is the judgement the soname exists to take away. **Note `deps/libakgl/deps/` pins its own `libakerror` and `libakstdlib` older than ours**; the top-level build declares both targets first and libakgl's `if(NOT TARGET ...)` guards mean its copies are never configured, so what libakgl actually compiles against is what this tree pins. |
 
 **An unhandled error in this band used to exit zero, and 512 is the worst possible base for
 that.** `libakerror`'s default unhandled-error handler ended in `exit(errctx->status)`, and a

docs/09-files-and-disk.md

@@ -126,7 +126,7 @@ exists, and reading into one you never sized writes over something else.
 | `COLLECT` | validates a disk's block allocation map. There is no map |
 | `BACKUP` | duplicates one disk onto another. There are no disks |
 | `BOOT` | loads and runs a boot sector. There is no boot sector |
-| `DIRECTORY` / `CATALOG` | needs a directory-reading wrapper the standard library does not have yet. Filed upstream |
+| `DIRECTORY` / `CATALOG` | not written yet. It was blocked on a directory-reading wrapper in the standard library; that landed, so only the verb is outstanding |
 
 `DCLEAR` is the exception among the drive verbs: resetting a drive also closes its
 channels, and closing the channels is real, so that is what it does.

docs/11-verb-reference.md

@@ -35,7 +35,7 @@ for the reasoning in each case.
 | `DIALOG` | `DIALOG ["text"]` | Show a text panel across the bottom of the screen. No argument takes it down. See Chapter 19. |
 | `DIM` | `DIM A#(n [,...])` | Make an array. Subscripts start at zero; `n` is the count. |
 | `DIM` … `AS` | `DIM S@ AS T`, `DIM P@ AS PTR TO T` | Make a structure, or a strict pointer to one. See Chapter 16. |
-| `DIRECTORY` | `DIRECTORY` | **Refused.** Needs a directory-reading wrapper that does not exist yet. |
+| `DIRECTORY` | `DIRECTORY` | **Refused.** Not written yet; the standard-library wrapper it waited on has landed. |
 | `DLOAD` | `DLOAD "name"` | Load a program from a file. |
 | `DO` | `DO [WHILE c | UNTIL c]` | Start a loop. The condition may be here, on the `LOOP`, or neither. |
 | `DOPEN` | `DOPEN n, "name" [,W]` | Open a file on channel `n`. `W` opens it for writing. |

docs/13-differences.md

@@ -199,7 +199,8 @@ interpreter's error code, which bears no relation to a Commodore error number. P
 - **`BLOAD` requires a length.**
 - **`HEADER`, `COLLECT`, `BACKUP` and `BOOT` are refused.** They operate on a physical
   disk.
-- **`DIRECTORY` is refused** pending a wrapper in the standard library.
+- **`DIRECTORY` is refused** because it is not written yet. The standard-library
+  wrapper it was waiting on has landed, so the remaining work is the verb.
 
 ## Machine
 

include/akbasic/error.h

@@ -12,9 +12,12 @@
  * libakerror 2.0.0 is the floor, raised from 1.0.0 because 2.0.0 is an ABI break
  * that a compile against the wrong header cannot survive quietly:
  *
- *   - `__akerr_last_ignored` became thread-local. `IGNORE` expands at *our* call
+ *   - The context behind `IGNORE` became thread-local. `IGNORE` expands at *our*
- *     site, so our objects reference that symbol under whichever storage model
+ *     call site, so our objects reference that storage under whichever model the
- *     the header on the include path declared.
+ *     header on the include path declared. 2.0.2 went further and made it a
+ *     per-translation-unit `static` snapshot named `akerr_last_ignored`, copied
+ *     from the pool slot so the slot can be released; the old spelling
+ *     `__akerr_last_ignored` was an `extern` pointer and no longer exists.
  *   - `akerr_next_error()` now returns a context that already holds a reference,
  *     and `ENSURE_ERROR_READY` no longer increments. Objects compiled against a
  *     1.x header count every reference twice and never give a slot back.

src/runtime_disk.c

@@ -407,17 +407,22 @@ akerr_ErrorContext *akbasic_cmd_directory(akbasic_Runtime *obj, akbasic_ASTLeaf
     FAIL_ZERO_RETURN(errctx, (obj != NULL && dest != NULL), AKERR_NULLPOINTER,
 		     "NULL argument in DIRECTORY");
     /*
-     * Refused rather than half-built. Listing a directory needs opendir/readdir,
+     * Refused rather than half-built. This was blocked upstream: listing a
-     * which `libakstdlib` does not wrap -- and this project's rule is that a
+     * directory needs opendir/readdir, `libakstdlib` did not wrap them, and
-     * missing capability gets filed upstream rather than worked around here
+     * this project's rule is that a missing capability gets filed upstream
-     * (MAINTENANCE.md). Filed as libakstdlib issue #10.
+     * rather than worked around here (MAINTENANCE.md). That was libakstdlib
+     * issue #10, and it landed -- aksl_opendir, aksl_readdir, aksl_closedir
+     * and aksl_rewinddir all exist as of the revision this tree pins.
      *
-     * The alternative was shelling out to `ls`, which a library has no business
+     * So the blocker is gone and only the work is left. Writing the verb needs
-     * doing, or calling readdir directly and stepping outside the error
+     * decisions this commit is not the place for: what a listing looks like on
-     * convention every other call in this file follows.
+     * a filesystem with no disk-image block counts, which of the Commodore
+     * wildcard forms to honour, and where the entries go. Tracked as akbasic
+     * issue #55; the refusal stays honest until then rather than growing a
+     * half-listing nobody specified.
      */
     FAIL_RETURN(errctx, AKBASIC_ERR_DEVICE,
-		"DIRECTORY is not implemented: libakstdlib has no directory-reading wrapper yet");
+		"DIRECTORY is not implemented yet");
 }
 
 /* ------------------------------------------------------------ BSAVE/BLOAD -- */

tests/disk_verbs.c

@@ -244,10 +244,16 @@ static void test_no_drive_verbs(void)
 	harness_stop();
     }
 
-    /* DIRECTORY is refused for a different reason, and says which. */
+    /*
+     * DIRECTORY is refused for a different reason than the five above: not for
+     * want of a drive, but because it is unwritten. It used to name the missing
+     * libakstdlib wrapper; that wrapper landed, so naming it would be a lie.
+     */
     TEST_REQUIRE_OK(run_program("10 DIRECTORY\n"));
-    TEST_REQUIRE(strstr(HARNESS_OUTPUT, "libakstdlib") != NULL,
+    TEST_REQUIRE(strstr(HARNESS_OUTPUT, "not implemented") != NULL,
-		 "DIRECTORY should name the missing wrapper, got \"%s\"", HARNESS_OUTPUT);
+		 "DIRECTORY should say it is unwritten, got \"%s\"", HARNESS_OUTPUT);
+    TEST_REQUIRE(strstr(HARNESS_OUTPUT, "libakstdlib") == NULL,
+		 "DIRECTORY must not still blame libakstdlib, got \"%s\"", HARNESS_OUTPUT);
     harness_stop();
 }