fs: implement size/fatsize/ext4size
These commands may be used to determine the size of a file without
actually reading the whole file content into memory. This may be used
to determine if the file will fit into the memory buffer that will
contain it. In particular, the DFU code will use it for this purpose
in the next commit.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
diff --git a/fs/fat/fat.c b/fs/fat/fat.c
index 54f42ea..561921f 100644
--- a/fs/fat/fat.c
+++ b/fs/fat/fat.c
@@ -1243,6 +1243,11 @@
return sz >= 0;
}
+int fat_size(const char *filename)
+{
+ return do_fat_read_at(filename, 0, NULL, 0, LS_NO, 1);
+}
+
long file_fat_read_at(const char *filename, unsigned long pos, void *buffer,
unsigned long maxsize)
{