notmuch new: Fix to work on filesystems returning DT_UNKNOWN

Such as reiserfs or xfs. This has been broken since the merge of
support for rename and deletion of files from the mail store.

Here's the original justification for the patch:

A review of notmuch-new.c shows three uses of ->d_type:

Near line 153, in _entries_resemble_maildir() we can simply allow for
DT_UNKNOWN. This would fail if people have MH-style folders which have
three folders called "new" "cur" and "tmp", but that seems unlikely, in
which case the "tmp" folder would simply not be scanned.

Near line 273 in add_files_recursive() we have another check. If
DT_UNKNOWN, we fall through, then add_files_recursive() does a stat
almost immediately, returning with success if the path isn't a
directory.

Thus, the fallback is already written.

Finally, near line 343, in add_files_recursive() (a long function) we
have another check. Here we can simply treat DT_UNKNOWN as DT_LNK, since
the logic for the stat() results are the same.

diff --git a/notmuch-new.c b/notmuch-new.c
index b740ee2b8c29d0e09d65f19de92693f2bcb448b3..3e6b96a7c45688501b512650d9332ac1c02032b2 100644 (file)
--- a/notmuch-new.c
+++ b/notmuch-new.c
@@ -153,7 +153,7 @@ _entries_resemble_maildir (struct dirent **entries, int count)
     int i, found = 0;
 
     for (i = 0; i < count; i++) {
     int i, found = 0;
 
     for (i = 0; i < count; i++) {

-       if (entries[i]->d_type != DT_DIR)
+       if (entries[i]->d_type != DT_DIR && entries[i]->d_type != DT_UNKNOWN)

            continue;
 
        if (strcmp(entries[i]->d_name, "new") == 0 ||
            continue;
 
        if (strcmp(entries[i]->d_name, "new") == 0 ||


@@ -273,7 +273,8 @@ add_files_recursive (notmuch_database_t *notmuch,
 
        entry = fs_entries[i];
 
 
        entry = fs_entries[i];
 

-       if (entry->d_type != DT_DIR && entry->d_type != DT_LNK)
+       if (entry->d_type != DT_DIR && entry->d_type != DT_LNK
+                       && entry->d_type != DT_UNKNOWN)

            continue;
 
        /* Ignore special directories to avoid infinite recursion.
            continue;
 
        /* Ignore special directories to avoid infinite recursion.


@@ -343,7 +344,7 @@ add_files_recursive (notmuch_database_t *notmuch,
 
        /* If we're looking at a symlink, we only want to add it if it
         * links to a regular file, (and not to a directory, say). */
 
        /* If we're looking at a symlink, we only want to add it if it
         * links to a regular file, (and not to a directory, say). */

-       if (entry->d_type == DT_LNK) {
+       if (entry->d_type == DT_LNK || entry->d_type == DT_UNKNOWN) {

            int err;
 
            next = talloc_asprintf (notmuch, "%s/%s", path, entry->d_name);
            int err;
 
            next = talloc_asprintf (notmuch, "%s/%s", path, entry->d_name);