AP_Filesystem: support file rename

libraries/AP_Filesystem/AP_Filesystem.cpp

@@ -182,6 +182,12 @@ int AP_Filesystem::mkdir(const char *pathname)
     return backend.fs.mkdir(pathname);
 }
 
+int AP_Filesystem::rename(const char *oldpath, const char *newpath)
+{
+    const Backend &backend = backend_by_path(oldpath);
+    return backend.fs.rename(oldpath, newpath);
+}
+
 AP_Filesystem::DirHandle *AP_Filesystem::opendir(const char *pathname)
 {
     const Backend &backend = backend_by_path(pathname);

libraries/AP_Filesystem/AP_Filesystem.h

@@ -93,6 +93,7 @@ public:
     int stat(const char *pathname, struct stat *stbuf);
     int unlink(const char *pathname);
     int mkdir(const char *pathname);
+    int rename(const char *oldpath, const char *newpath);
 
     DirHandle *opendir(const char *pathname);
     struct dirent *readdir(DirHandle *dirp);

libraries/AP_Filesystem/AP_Filesystem_ESP32.cpp

@@ -91,6 +91,14 @@ int AP_Filesystem_ESP32::unlink(const char *pathname)
     return ::unlink(pathname);
 }
 
+int AP_Filesystem_ESP32::rename(const char *oldpath, const char *newpath)
+{
+#if FSDEBUG
+    printf("DO rename %s \n", oldpath, newpath);
+#endif
+    return ::rename(oldpath, newpath);
+}
+
 int AP_Filesystem_ESP32::mkdir(const char *pathname)
 {
 #if FSDEBUG

libraries/AP_Filesystem/AP_Filesystem_ESP32.h

@@ -33,6 +33,7 @@ public:
     void *opendir(const char *pathname) override;
     struct dirent *readdir(void *dirp) override;
     int closedir(void *dirp) override;
+    int rename(const char *oldpath, const char *newpath) override;
 
     // return free disk space in bytes, -1 on error
     int64_t disk_free(const char *path) override;

libraries/AP_Filesystem/AP_Filesystem_FATFS.cpp

@@ -665,6 +665,22 @@ int AP_Filesystem_FATFS::mkdir(const char *pathname)
     return 0;
 }
 
+int AP_Filesystem_FATFS::rename(const char *oldpath, const char *newpath)
+{
+    FS_CHECK_ALLOWED(-1);
+    WITH_SEMAPHORE(sem);
+
+    errno = 0;
+
+    int res = f_rename(oldpath, newpath);
+    if (res != FR_OK) {
+        errno = fatfs_to_errno((FRESULT)res);
+        return -1;
+    }
+
+    return 0;
+}
+
 /*
   wrapper structure to associate a dirent with a DIR
  */

libraries/AP_Filesystem/AP_Filesystem_FATFS.h

@@ -30,6 +30,7 @@ public:
     int unlink(const char *pathname) override;
     int mkdir(const char *pathname) override;
     void *opendir(const char *pathname) override;
+    int rename(const char *oldpath, const char *newpath) override;
     struct dirent *readdir(void *dirp) override;
     int closedir(void *dirp) override;
 

libraries/AP_Filesystem/AP_Filesystem_backend.h

@@ -57,6 +57,7 @@ public:
     virtual void *opendir(const char *pathname) { return nullptr; }
     virtual struct dirent *readdir(void *dirp) { return nullptr; }
     virtual int closedir(void *dirp) { return -1; }
+    virtual int rename(const char *oldpath, const char *newpath) { return -1; }
 
     // return free disk space in bytes, -1 on error
     virtual int64_t disk_free(const char *path) { return 0; }

libraries/AP_Filesystem/AP_Filesystem_posix.cpp

@@ -135,6 +135,14 @@ int AP_Filesystem_Posix::closedir(void *dirp)
     return ::closedir((DIR *)dirp);
 }
 
+int AP_Filesystem_Posix::rename(const char *oldpath, const char *newpath)
+{
+    FS_CHECK_ALLOWED(-1);
+    oldpath = map_filename(oldpath);
+    newpath = map_filename(newpath);
+    return ::rename(oldpath, newpath);
+}
+
 // return free disk space in bytes
 int64_t AP_Filesystem_Posix::disk_free(const char *path)
 {

libraries/AP_Filesystem/AP_Filesystem_posix.h

@@ -41,6 +41,7 @@ public:
     void *opendir(const char *pathname) override;
     struct dirent *readdir(void *dirp) override;
     int closedir(void *dirp) override;
+    int rename(const char *oldpath, const char *newpath) override;
 
     // return free disk space in bytes, -1 on error
     int64_t disk_free(const char *path) override;