If notmuch-deliver just gives up on a locked database this can result
in mail bouncing.
This patch makes it wait a given time and then retry to open the
database. The wait time starts at a millisecond, and doubles every
time the database is still locked, until an absolute maximum time of
10 minutes is reached.
---
contrib/notmuch-deliver/src/main.c | 25 ++++++++++++++++++++++---
1 files changed, 22 insertions(+), 3 deletions(-)
diff --git a/contrib/notmuch-deliver/src/main.c b/contrib/notmuch-deliver/src/main.c
index f7a4eaa..e30cbac 100644
--- a/contrib/notmuch-deliver/src/main.c
+++ b/contrib/notmuch-deliver/src/main.c
@@ -71,6 +71,9 @@
#define EX_CONFIG 78
#endif
+#define MIN_UWAIT 1000 // 1 millisecond
+#define MAX_UWAIT 600000000 // 10 minutes
+
static gboolean opt_create, opt_fatal, opt_folder, opt_version;
static gboolean opt_verbose = FALSE;
static gchar **opt_tags = NULL;
@@ -428,10 +431,26 @@ main(int argc, char **argv)
maildir = g_strdup(db_path);
g_debug("Opening notmuch database `%s'", db_path);
- db = notmuch_database_open(db_path, NOTMUCH_DATABASE_MODE_READ_WRITE);
+ gint32 wait_time = 0;
+ gint32 next_wait = MIN_UWAIT;
+ while ((db = notmuch_database_open(db_path, NOTMUCH_DATABASE_MODE_READ_WRITE)) == NULL) {
+ g_debug("Retrying to open database in %u microseconds", next_wait);
+ usleep(next_wait);
+
+ next_wait *= 2;
+ if (wait_time + next_wait >= MAX_UWAIT) {
+ wait_time = next_wait - MAX_UWAIT;
+ if (wait_time <= 0) {
+ g_free(db_path);
+ if (db == NULL)
+ return EX_SOFTWARE;
+ }
+ }
+
+ wait_time += next_wait;
+ }
g_free(db_path);
- if (db == NULL)
- return EX_SOFTWARE;
+
if (notmuch_database_needs_upgrade(db)) {
g_message("Upgrading database");
notmuch_database_upgrade(db, NULL, NULL);
--
1.7.7.1