+static int log_level = 0;
+static int log_level_initialized = 0;
+
+RSET rset_create_temp(NMEM nmem, struct rset_key_control *kcontrol,
+ int scope, const char *temp_path, TERMID term)
+{
+ RSET rnew = rset_create_base(&control, nmem, kcontrol, scope, term,
+ 0, 0);
+ struct rset_private *info;
+ if (!log_level_initialized)
+ {
+ log_level = yaz_log_module_level("rstemp");
+ log_level_initialized = 1;
+ }
+ info = (struct rset_private *) nmem_malloc(rnew->nmem, sizeof(*info));
+ info->fd = -1;
+ info->fname = NULL;
+ info->buf_size = 4096;
+ info->buf_mem = (char *) nmem_malloc(rnew->nmem, info->buf_size);
+ info->pos_end = 0;
+ info->pos_buf = 0;
+ info->dirty = 0;
+ info->hits = 0;
+
+ if (!temp_path)
+ info->temp_path = NULL;
+ else
+ info->temp_path = nmem_strdup(rnew->nmem, temp_path);
+ rnew->priv = info;
+ return rnew;
+} /* rstemp_create */
+
+static void r_delete(RSET ct)
+{
+ struct rset_private *info = (struct rset_private*) ct->priv;
+
+ yaz_log(log_level, "r_delete: set size %ld", (long) info->pos_end);
+ if (info->fname)
+ {
+ yaz_log(log_level, "r_delete: unlink %s", info->fname);
+ unlink(info->fname);
+ }
+}
+
+static RSFD r_open(RSET ct, int flag)
+{
+ struct rset_private *info = (struct rset_private *) ct->priv;
+ RSFD rfd;
+ struct rfd_private *prfd;
+
+ if (info->fd == -1 && info->fname)
+ {
+ if (flag & RSETF_WRITE)
+ info->fd = open(info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
+ else
+ info->fd = open(info->fname, O_BINARY|O_RDONLY);
+ if (info->fd == -1)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open failed %s", info->fname);
+ zebra_exit("r_open");
+ }
+ }
+ rfd = rfd_create_base(ct);
+ if (!rfd->priv)
+ {
+ prfd = (struct rfd_private *) nmem_malloc(ct->nmem, sizeof(*prfd));
+ rfd->priv = (void *)prfd;
+ prfd->buf = nmem_malloc(ct->nmem,ct->keycontrol->key_size);
+ }
+ else
+ prfd= rfd->priv;
+ r_flush(rfd, 0);
+ prfd->pos_cur = 0;
+ info->pos_buf = 0;
+ r_reread(rfd);
+ prfd->cur = 0;
+ return rfd;
+}
+
+/* r_flush:
+ flush current window to file if file is assocated with set
+ */
+static void r_flush(RSFD rfd, int mk)
+{
+ struct rset_private *info = rfd->rset->priv;
+
+ if (!info->fname && mk)
+ {
+#if HAVE_MKSTEMP
+ char template[1024];
+
+ *template = '\0';
+
+ if (info->temp_path)
+ sprintf(template, "%s/", info->temp_path);
+ strcat(template, "zrs_");
+#if HAVE_UNISTD_H
+ sprintf(template + strlen(template), "%ld_", (long) getpid());
+#endif
+ strcat(template, "XXXXXX");
+
+ info->fd = mkstemp(template);
+ if (info->fd == -1)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: mkstemp %s", template);
+ zebra_exit("r_flush");
+ }
+ info->fname = nmem_strdup(rfd->rset->nmem, template);
+#else
+ char *s = (char*) tempnam(info->temp_path, "zrs");
+ info->fname= nmem_strdup(rfd->rset->nmem, s);
+
+ yaz_log(log_level, "creating tempfile %s", info->fname);
+ info->fd = open(info->fname, O_BINARY|O_RDWR|O_CREAT, 0666);
+ if (info->fd == -1)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: open %s", info->fname);
+ zebra_exit("r_flush");
+ }
+#endif
+ }
+ if (info->fname && info->fd != -1 && info->dirty)
+ {
+ size_t count;
+ int r;
+
+ if (lseek(info->fd, info->pos_buf, SEEK_SET) == -1)
+ {
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: lseek (1) %s", info->fname);
+ zebra_exit("r_flusxh");
+ }
+ count = info->buf_size;
+ if (count > info->pos_end - info->pos_buf)
+ count = info->pos_end - info->pos_buf;
+ if ((r = write(info->fd, info->buf_mem, count)) < (int) count)
+ {
+ if (r == -1)
+ yaz_log(YLOG_FATAL|YLOG_ERRNO, "rstemp: write %s", info->fname);
+ else
+ yaz_log(YLOG_FATAL, "rstemp: write of %ld but got %ld",
+ (long) count, (long) r);
+ zebra_exit("r_flush");
+ }
+ info->dirty = 0;
+ }
+}
+
+static void r_close(RSFD rfd)
+{
+ struct rset_private *info = (struct rset_private *)rfd->rset->priv;
+ if (rfd_is_last(rfd))
+ {
+ r_flush(rfd, 0);
+ if (info->fname && info->fd != -1)
+ {
+ close(info->fd);
+ info->fd = -1;
+ }
+ }
+}
+
+
+/* r_reread:
+ read from file to window if file is assocated with set -
+ indicated by fname
+ */
+static void r_reread(RSFD rfd)
+{
+ struct rfd_private *mrfd = (struct rfd_private*) rfd->priv;
+ struct rset_private *info = (struct rset_private *)rfd->rset->priv;