Update the info files regularly. Before they were only updated when a torrent

stopped.

btpd/tlib.c

@@ -183,7 +183,8 @@ save_info(struct tlib *tl)
         btpd_err("failed to open '%s' (%s).\n", wpath, strerror(errno));
     dct_subst_save(fp, "de", iob.buf);
     buf_free(&iob);
-    if (ferror(fp) || fclose(fp) != 0)
+    if ((fflush(fp) == EOF || fsync(fileno(fp)) != 0
+            || ferror(fp) || fclose(fp) != 0))
         btpd_err("failed to write '%s'.\n", wpath);
     if (rename(wpath, path) != 0)
         btpd_err("failed to rename: '%s' -> '%s' (%s).\n", wpath, path,
@@ -191,9 +192,14 @@ save_info(struct tlib *tl)
 }
 
 void
-tlib_update_info(struct tlib *tl)
+tlib_update_info(struct tlib *tl, int only_file)
 {
+    struct tlib tmp;
     assert(tl->tp != NULL);
+    if (only_file) {
+        tmp = *tl;
+        tl = &tmp;
+    }
     tl->tot_down += tl->tp->net->downloaded;
     tl->tot_up += tl->tp->net->uploaded;
     tl->content_have = cm_content(tl->tp);

btpd/tlib.h

@@ -28,7 +28,7 @@ struct tlib *tlib_add(const uint8_t *hash, const char *mi, size_t mi_size,
     const char *content, char *name);
 int tlib_del(struct tlib *tl);
 
-void tlib_update_info(struct tlib *tl);
+void tlib_update_info(struct tlib *tl, int only_file);
 
 struct tlib *tlib_by_hash(const uint8_t *hash);
 struct tlib *tlib_by_num(unsigned num);

btpd/torrent.c

@@ -16,9 +16,14 @@
 #include "tracker_req.h"
 #include "stream.h"
 
+#define SAVE_INTERVAL 300
+
 static unsigned m_ntorrents;
 static struct torrent_tq m_torrents = BTPDQ_HEAD_INITIALIZER(m_torrents);
 
+static unsigned m_tsave;
+static struct torrent *m_savetp;
+
 const struct torrent_tq *
 torrent_get_all(void)
 {
@@ -113,6 +118,10 @@ torrent_start(struct tlib *tl)
         m_ntorrents++;
         cm_start(tp, 0);
         free(mi);
+        if (m_ntorrents == 1) {
+            m_tsave = btpd_seconds + SAVE_INTERVAL;
+            m_savetp = tp;
+        }
         return IPC_OK;
     } else {
         mi_free_files(tp->nfiles, tp->files);
@@ -137,6 +146,9 @@ torrent_kill(struct torrent *tp)
     net_kill(tp);
     cm_kill(tp);
     mi_free_files(tp->nfiles, tp->files);
+    if (m_savetp == tp)
+        if ((m_savetp = BTPDQ_NEXT(tp, entry)) == NULL)
+            m_savetp = BTPDQ_FIRST(&m_torrents);
     free(tp);
 }
 
@@ -157,7 +169,7 @@ torrent_stop(struct torrent *tp, int delete)
         if (cm_active(tp))
             cm_stop(tp);
         if (!delete)
-            tlib_update_info(tp->tl);
+            tlib_update_info(tp->tl, 0);
         break;
     case T_STOPPING:
         if (tr_active(tp))
@@ -211,4 +223,15 @@ torrent_on_tick_all(void)
     struct torrent *tp, *next;
     BTPDQ_FOREACH_MUTABLE(tp, &m_torrents, entry, next)
         torrent_on_tick(tp);
+
+    if (m_savetp != NULL && m_tsave <= btpd_seconds) {
+        if (m_savetp->state == T_LEECH || m_savetp->state == T_SEED) {
+            tlib_update_info(m_savetp->tl, 1);
+            if ((m_savetp = BTPDQ_NEXT(m_savetp, entry)) == NULL)
+                m_savetp = BTPDQ_FIRST(&m_torrents);
+            if (m_ntorrents > 0)
+                m_tsave = btpd_seconds +
+                    max(m_ntorrents, SAVE_INTERVAL) / m_ntorrents;
+        }
+    }
 }