in_serial: Restore termios before exiting.

Signed-off-by: Takeshi HASEGAWA <[email protected]>

plugins/in_serial/in_serial.c

@@ -131,6 +131,15 @@ int in_serial_collect(struct flb_config *config, void *in_context)
    }
 }
 
+/* Cleanup serial input */
+int in_serial_exit(void *in_context, struct flb_config *config)
+{
+    struct flb_in_serial_config *ctx = in_context;
+
+    flb_debug("[in_serial] Restoring original termios...");
+    tcsetattr(ctx->fd, TCSANOW, &ctx->tio_orig);
+}
+
 /* Init serial input */
 int in_serial_init(struct flb_config *config)
 {
@@ -166,6 +175,7 @@ int in_serial_init(struct flb_config *config)
     msgpack_sbuffer_init(&ctx->mp_sbuf);
     msgpack_packer_init(&ctx->mp_pck, &ctx->mp_sbuf, msgpack_sbuffer_write);
 
+    tcgetattr(fd, &ctx->tio_orig);
     memset(&ctx->tio, 0, sizeof(ctx->tio));
     ctx->tio.c_cflag = ctx->tio.c_ispeed = ctx->tio.c_ospeed = atoi(ctx->bitrate);
     ctx->tio.c_cflag |= CRTSCTS | CS8 | CLOCAL | CREAD;
@@ -209,5 +219,6 @@ struct flb_input_plugin in_serial_plugin = {
     .cb_init      = in_serial_init,
     .cb_pre_run   = NULL,
     .cb_collect   = in_serial_collect,
-    .cb_flush_buf = in_serial_flush
+    .cb_flush_buf = in_serial_flush,
+    .cb_exit      = in_serial_exit
 };