dd: create a sparse file when seek=N is used

When the seek=N argument is used mark the file as sparse and set
the range that is sparse.

See https://stackoverflow.com/questions/4011508/how-to-create-a-sparse-file-on-ntfs

1 files changed, 1 insertions, 0 deletions

diff --git a/include/mingw.h b/include/mingw.h
index 3ab49a920..a5a84cff2 100644
--- a/include/mingw.h
+++ b/include/mingw.h
@@ -533,3 +533,4 @@ int chdir_system_drive(void);
 char *xabsolute_path(char *path);
 char *get_drive_cwd(const char *path, char *buffer, int size);
 void fix_path_case(char *path);
+void seek_sparse(int fd, size_t size);