mtree: append "/" to all directory entries

casync attempts to output all entries as a Full entry but for top-level
directories, there is no "/" in the escaped pathname, resulting in the
entry being treated as a Relative entry. As per the specification[1],
this results in any subsequent Relative entries (such as top-level
files) being treated as children of the directory which causes manifests
produced by casync to fail.

The simplest solution is to force all directories to be treated as Full
entries by adding a dummy "/" to the end of the pathname. It's not
necessary to do anything for top-level files because they do not affect
the "current directory" during parsing.

[1]: https://man.netbsd.org/mtree.5

Ref: vbatts/go-mtree#146
Signed-off-by: Aleksa Sarai <[email protected]>

src/casync-tool.c

@@ -1847,6 +1847,9 @@ static int list_one_file(const char *arg0, CaSync *s, bool *toplevel_shown) {
                 (void) ca_sync_current_fat_attrs(s, &fat_attrs);
 
                 fputs(empty_to_dot(escaped), stdout);
+                /* append a "/" to force directory entries to be treated as a Full path */
+                if (S_ISDIR(mode))
+                        fputc('/', stdout);
 
                 if (S_ISLNK(mode))
                         fputs(" type=link", stdout);