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/include/fs.h b/include/fs.h
index 26de053..06a45f2 100644
--- a/include/fs.h
+++ b/include/fs.h
@@ -51,6 +51,13 @@
int fs_exists(const char *filename);
/*
+ * Determine a file's size
+ *
+ * Returns the file's size in bytes, or a negative value if it doesn't exist.
+ */
+int fs_size(const char *filename);
+
+/*
* Read file "filename" from the partition previously set by fs_set_blk_dev(),
* to address "addr", starting at byte offset "offset", and reading "len"
* bytes. "offset" may be 0 to read from the start of the file. "len" may be
@@ -75,6 +82,8 @@
* Common implementation for various filesystem commands, optionally limited
* to a specific filesystem type via the fstype parameter.
*/
+int do_size(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
+ int fstype);
int do_load(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],
int fstype);
int do_ls(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[],