From: Tim Waugh <twaugh@fedoraproject.org>
Date: Fri, 31 Jan 2020 12:35:31 +0100
Subject: Avoid busy loop in hpcups when backend has exited

Origin: https://src.fedoraproject.org/rpms/hplip/blob/master/f/hplip-hpcups-sigpipe.patch
---
 prnt/hpijs/services.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/prnt/hpijs/services.cpp b/prnt/hpijs/services.cpp
index 026ef1a..2938c8d 100644
--- a/prnt/hpijs/services.cpp
+++ b/prnt/hpijs/services.cpp
@@ -29,6 +29,7 @@
     POSSIBILITY OF SUCH DAMAGE.
 \*****************************************************************************/
 
+#include <errno.h>
 #include <sys/stat.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -385,8 +386,16 @@ DRIVER_ERROR UXServices::ToDevice(const BYTE * pBuffer, DWORD * Count)
    if (write(OutputPath, pBuffer, *Count) != (ssize_t)*Count) 
    {
       static int cnt=0;
-      if (cnt++ < 5)
+      if (cnt < 5)
+      {
+	 cnt++;
          BUG("unable to write to output, fd=%d, count=%d: %m\n", OutputPath, *Count);
+      }
+
+      if (errno == EPIPE)
+	 /* The backend has exited.  There's no recovering from that. */
+	 exit (1);
+
       return IO_ERROR;
    }