Client: Don't crash when the receiver of a paste closes the pipe

Ignore the SIGPIPE signal

Task-number: QTBUG-57202
Change-Id: If22381f446675836aeb741a8e6da5473b0a27301
Reviewed-by: Martin Gräßlin <mgraesslin@kde.org>
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/client/qwaylanddatasource.cpp b/src/client/qwaylanddatasource.cpp
index 036bd0d86..c61de181b 100644
--- a/src/client/qwaylanddatasource.cpp
+++ b/src/client/qwaylanddatasource.cpp
@@ -48,6 +48,7 @@
 #include <QtCore/QDebug>
 
 #include <unistd.h>
+#include <signal.h>
 
 #if QT_CONFIG(draganddrop)
 
@@ -85,7 +86,16 @@ void QWaylandDataSource::data_source_send(const QString &mime_type, int32_t fd)
 {
     QByteArray content = QWaylandMimeHelper::getByteArray(m_mime_data, mime_type);
     if (!content.isEmpty()) {
+        // Create a sigpipe handler that does nothing, or clients may be forced to terminate
+        // if the pipe is closed in the other end.
+        struct sigaction action, oldAction;
+        action.sa_handler = SIG_IGN;
+        sigemptyset (&action.sa_mask);
+        action.sa_flags = 0;
+
+        sigaction(SIGPIPE, &action, &oldAction);
         write(fd, content.constData(), content.size());
+        sigaction(SIGPIPE, &oldAction, nullptr);
     }
     close(fd);
 }