From a301965452a5e73914ae8ccd3c66d3a4a0d0d47b Mon Sep 17 00:00:00 2001
From: cnc <cnc@localhost>
Date: Fri, 5 Jun 2026 10:31:33 +0800
Subject: [PATCH] =?UTF-8?q?=E6=89=A7=E8=A1=8C=20AGENTS=20align-linuxcnc=20?=
 =?UTF-8?q?=E5=8A=A0=E9=80=9F=E8=A7=84=E5=88=99?=
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结论：补强 WASM runtime 可执行探针，依据 LinuxCNC src/emc/rs274ngc/rs274ngc_pre.cc 中程序/子程序路径解析对 wordexp() 的使用，覆盖  形式的环境变量展开。验证通过：./test-linuxcnc-wasm-runtime-link.sh、./test-native.sh、./test-linuxcnc-source-link.sh。
---
 .../cnc_sim_wasm_runtime_probe_main.cc        | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/core/wasm_shims/cnc_sim_wasm_runtime_probe_main.cc b/core/wasm_shims/cnc_sim_wasm_runtime_probe_main.cc
index d664cda..03a3e26 100644
--- a/core/wasm_shims/cnc_sim_wasm_runtime_probe_main.cc
+++ b/core/wasm_shims/cnc_sim_wasm_runtime_probe_main.cc
@@ -60,6 +60,22 @@ bool wordexp_expands_environment_variables() {
     return ok;
 }
 
+bool wordexp_expands_braced_environment_variables() {
+    setenv("CNC_SIM_WORDEXP_BRACED_PROBE", "linuxcnc-braced-wordexp", 1);
+
+    wordexp_t expanded{};
+    if (wordexp("${CNC_SIM_WORDEXP_BRACED_PROBE}/subroutines", &expanded, 0) != 0) {
+        return false;
+    }
+
+    const bool ok = expanded.we_wordc == 1 &&
+                    expanded.we_wordv &&
+                    expanded.we_wordv[0] &&
+                    std::strcmp(expanded.we_wordv[0], "linuxcnc-braced-wordexp/subroutines") == 0;
+    wordfree(&expanded);
+    return ok;
+}
+
 bool hal_lookup_is_unavailable() {
     if (hal_init("cnc_sim_wasm_runtime_probe") != 1) {
         return false;
@@ -109,6 +125,9 @@ int main() {
     if (!wordexp_expands_environment_variables()) {
         return 6;
     }
+    if (!wordexp_expands_braced_environment_variables()) {
+        return 8;
+    }
     if (!hal_lookup_is_unavailable()) {
         return 7;
     }