if ($rw && !-f $f) { # SQLite defaults mode to 0644, we want 0666
open my $fh, '+>>', $f or die "failed to open $f: $!";
}
- my $dbh = DBI->connect("dbi:SQLite:dbname=$f",'','', {
- AutoCommit => 1,
- RaiseError => 1,
- PrintError => 0,
- ReadOnly => !$rw,
- sqlite_use_immediate_transaction => 1,
- });
+ my (@st, $st, $dbh);
+ my $tries = 0;
+ do {
+ @st = stat($f) or die "failed to stat $f: $!";
+ $st = pack('dd', $st[0], $st[1]); # 0: dev, 1: inode
+ $dbh = DBI->connect("dbi:SQLite:dbname=$f",'','', {
+ AutoCommit => 1,
+ RaiseError => 1,
+ PrintError => 0,
+ ReadOnly => !$rw,
+ sqlite_use_immediate_transaction => 1,
+ });
+ $self->{st} = $st;
+ @st = stat($f) or die "failed to stat $f: $!";
+ $st = pack('dd', $st[0], $st[1]);
+ } while ($st ne $self->{st} && $tries++ < 3);
+ warn "W: $f: .st_dev, .st_ino unstable\n" if $st ne $self->{st};
$dbh->{sqlite_unicode} = 1;
$dbh;
}
load_from_row($smsg);
}
-# IMAP search
+# IMAP search, this is limited by callers to UID_SLICE size (50K)
sub uid_range {
my ($self, $beg, $end, $sql) = @_;
my $dbh = $self->connect;
# This is read-only, anyways; but caller should verify it's
# only sending \A[0-9]+\z for ds and ts column ranges
$q .= $$sql if $sql;
- $q .= ' ORDER BY num ASC LIMIT ' . DEFAULT_LIMIT;
+ $q .= ' ORDER BY num ASC';
$dbh->selectcol_arrayref($q, undef, $beg, $end);
}
+sub max {
+ my ($self) = @_;
+ my $sth = $self->connect->prepare_cached(<<'', undef, 1);
+SELECT MAX(num) FROM over WHERE num > 0
+
+ $sth->execute;
+ $sth->fetchrow_array // 0;
+}
+
+sub imap_exists {
+ my ($self, $uid_base, $uid_end) = @_;
+ my $sth = $self->connect->prepare_cached(<<'', undef, 1);
+SELECT COUNT(num) FROM over WHERE num > ? AND num <= ?
+
+ $sth->execute($uid_base, $uid_end);
+ $sth->fetchrow_array;
+}
+
+sub check_inodes {
+ my ($self) = @_;
+ if (my @st = stat($self->{filename})) { # did st_dev, st_ino change?
+ my $st = pack('dd', $st[0], $st[1]);
+
+ # don't actually reopen, just let {dbh} be recreated later
+ delete($self->{dbh}) if ($st ne ($self->{st} // $st));
+ } else {
+ warn "W: stat $self->{filename}: $!\n";
+ }
+}
+
1;