core: add new setting Writable= to ListenSpecial= socket units

Writable= is a new boolean setting. If ture, then ListenSpecial= will
open the specified path in O_RDWR mode, rather than just O_RDONLY.

This is useful for implementing services like rfkill, where /dev/rfkill
is more useful when opened in write mode, if we want to not only save
but also restore its state.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/core/socket.h b/src/core/socket.h
index aee0d34a27..d20dc8d81a 100644
--- a/src/core/socket.h
+++ b/src/core/socket.h
@@ -118,6 +118,7 @@ struct Socket {
 
         bool accept;
         bool remove_on_stop;
+        bool writable;
 
         /* Socket options */
         bool keep_alive;