Remove callback-handled channels from Available set

* src/process.c (wait_reading_process_output): Remove channel from
Available set if it is handled by a callback, e.g., dbus or
inotify (bug#21313).

1 files changed, 4 insertions, 1 deletions

diff --git a/src/process.c b/src/process.c
index 55f31a02673..73704c03ee7 100644
--- a/src/process.c
+++ b/src/process.c
@@ -5036,7 +5036,10 @@ wait_reading_process_output (intmax_t time_limit, int nsecs, int read_kbd,
                    && FD_ISSET (channel, &Available))
                   || (d->condition & FOR_WRITE
                       && FD_ISSET (channel, &write_mask))))
-            d->func (channel, d->data);
+            {
+              d->func (channel, d->data);
+              FD_CLR (channel, &Available);
+            }
         }
 
       for (channel = 0; channel <= max_process_desc; channel++)