Rework the way UI can trigger a client quitting

Add a UserInterface::is_ok method and return false on
SIGHUP/stdin closing/socket dropping

This should be cleaner and more robust than the previous SIGHUP
handling code.

Fixes #1594

1 files changed, 5 insertions, 0 deletions

diff --git a/src/client.cc b/src/client.cc
index 22836a25..8a0dfadb 100644
--- a/src/client.cc
+++ b/src/client.cc
@@ -71,6 +71,11 @@ Client::~Client()
                                               context().selections());
 }
 
+bool Client::is_ui_ok() const
+{
+    return m_ui->is_ok();
+}
+
 bool Client::process_pending_inputs()
 {
     const bool debug_keys = (bool)(context().options()["debug"].get<DebugFlags>() & DebugFlags::Keys);