From 9beea49c3cbe73454639679d37400297f2624cef Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <andrew@tridgell.net>
Date: Fri, 8 Dec 2023 11:19:07 +1100
Subject: [PATCH] AP_Filesystem: implement stat() call for lua

---
 libraries/AP_Filesystem/AP_Filesystem.cpp | 24 +++++++++++++++++++++++
 libraries/AP_Filesystem/AP_Filesystem.h   | 19 +++++++++++++++++-
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/libraries/AP_Filesystem/AP_Filesystem.cpp b/libraries/AP_Filesystem/AP_Filesystem.cpp
index c0ab14b986..e62ec59208 100644
--- a/libraries/AP_Filesystem/AP_Filesystem.cpp
+++ b/libraries/AP_Filesystem/AP_Filesystem.cpp
@@ -333,6 +333,30 @@ AP_Filesystem_Backend::FormatStatus AP_Filesystem::get_format_status(void) const
 }
 #endif
 
+/*
+  stat wrapper for scripting
+ */
+bool AP_Filesystem::stat(const char *pathname, stat_t &stbuf)
+{
+    struct stat st;
+    if (fs.stat(pathname, &st) != 0) {
+        return false;
+    }
+    stbuf.size = st.st_size;
+    stbuf.mode = st.st_mode;
+    // these wrap in 2038
+    stbuf.atime = st.st_atime;
+    stbuf.ctime = st.st_ctime;
+    stbuf.mtime = st.st_mtime;
+    return true;
+}
+
+// get_singleton for scripting
+AP_Filesystem *AP_Filesystem::get_singleton(void)
+{
+    return &fs;
+}
+
 namespace AP
 {
 AP_Filesystem &FS()
diff --git a/libraries/AP_Filesystem/AP_Filesystem.h b/libraries/AP_Filesystem/AP_Filesystem.h
index 585a2f5e2e..b139713a75 100644
--- a/libraries/AP_Filesystem/AP_Filesystem.h
+++ b/libraries/AP_Filesystem/AP_Filesystem.h
@@ -82,6 +82,20 @@ public:
     int fsync(int fd);
     int32_t lseek(int fd, int32_t offset, int whence);
     int stat(const char *pathname, struct stat *stbuf);
+
+    // stat variant for scripting
+    typedef struct {
+        uint32_t size;
+        int32_t mode;
+        uint32_t mtime;
+        uint32_t atime;
+        uint32_t ctime;
+        bool is_directory(void) const {
+            return (mode & S_IFMT) == S_IFDIR;
+        }
+    } stat_t;
+    bool stat(const char *pathname, stat_t &stbuf);
+
     int unlink(const char *pathname);
     int mkdir(const char *pathname);
     int rename(const char *oldpath, const char *newpath);
@@ -121,7 +135,10 @@ public:
       load a full file. Use delete to free the data
      */
     FileData *load_file(const char *filename);
-    
+
+    // get_singleton for scripting
+    static AP_Filesystem *get_singleton(void);
+
 private:
     struct Backend {
         const char *prefix;