fs: fat: add rename
The implementation roughly follows the POSIX specification for
rename() [1]. The ordering of operations attempting to minimize the chance
for data loss in unexpected circumstances.
The 'mv' command was implemented as a front end for the rename operation
as that is what most users are likely familiar with in terms of behavior.
The 'FAT_RENAME' Kconfig option was added to prevent code size increase on
size-oriented builds like SPL.
[1] https://pubs.opengroup.org/onlinepubs/9799919799/functions/rename.html
Signed-off-by: Gabriel Dalimonte <gabriel.dalimonte@gmail.com>
diff --git a/include/fat.h b/include/fat.h
index 3dce99a..ca97880 100644
--- a/include/fat.h
+++ b/include/fat.h
@@ -206,6 +206,7 @@
int fat_readdir(struct fs_dir_stream *dirs, struct fs_dirent **dentp);
void fat_closedir(struct fs_dir_stream *dirs);
int fat_unlink(const char *filename);
+int fat_rename(const char *old_path, const char *new_path);
int fat_mkdir(const char *dirname);
void fat_close(void);
void *fat_next_cluster(fat_itr *itr, unsigned int *nbytes);