grab_fd and grab_file: add a size arg, use everywhere.
[ccan] / ccan / hash /
drwxr-xr-x   ..
-rw-r--r-- 661 _info.c
-rw-r--r-- 36720 hash.c
-rw-r--r-- 6299 hash.h
drwxr-xr-x - test