Various file comparison improvements

- Rename unchanged_file() to quick_check_ok().
- Enhance quick_check_ok() to work with non-regular files.
- Add a get_file_type() function to the generator.
- Use the new functions in the generator code to make the logic simpler.
- Fix a bug where the `--alt-dest` functions were not checking if a
  special file fully matched the non-permission mode bits before
  deciding if we have found an alt-dest match.
- Enhance the `--info=skip --ignore-existing` output to include extra
  info on if the existing file differs in type or passes the standard
  quick-check logic.
- Add `--info=skip2` that authorizes rsync to perform a slow checksum
  "quick check" when ignoring existing files. This provides the uptodate
  and differs info even if we need to checksum a file to get it.

1 files changed, 4 insertions, 0 deletions

diff --git a/rsync.h b/rsync.h
index 345a68a6..68dfba51 100644
--- a/rsync.h
+++ b/rsync.h
@@ -277,6 +277,10 @@ enum msgcode {
 	MSG_NO_SEND=102,/* sender failed to open a file we wanted */
 };
 
+enum filetype {
+	FT_UNSUPPORTED, FT_REG, FT_DIR, FT_SYMLINK, FT_SPECIAL, FT_DEVICE
+};
+
 #define NDX_DONE -1
 #define NDX_FLIST_EOF -2
 #define NDX_DEL_STATS -3