From 19689d34e6781247cd229b3e0034baabe79b4d0c Mon Sep 17 00:00:00 2001
From: Bartosz Kosiorek <gang65@poczta.onet.pl>
Date: Mon, 1 Jun 2020 15:39:53 +0200
Subject: ccmake: Display an error and interrupt execution if ncurses failed

---
 Source/CursesDialog/ccmake.cxx | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/Source/CursesDialog/ccmake.cxx b/Source/CursesDialog/ccmake.cxx
index 9a26db5..85e256b 100644
--- a/Source/CursesDialog/ccmake.cxx
+++ b/Source/CursesDialog/ccmake.cxx
@@ -2,11 +2,15 @@
    file Copyright.txt or https://cmake.org/licensing for details.  */
 
 #include <csignal>
+#include <cstdio>
+#include <cstdlib>
 #include <cstring>
 #include <iostream>
 #include <string>
 #include <vector>
 
+#include <unistd.h>
+
 #include "cmsys/Encoding.hxx"
 
 #include "cmCursesColor.h"
@@ -54,7 +58,12 @@ void onsig(int /*unused*/)
 {
   if (cmCursesForm::CurrentForm) {
     endwin();
-    initscr();            /* Initialization */
+    if (initscr() == nullptr) {
+      static const char errmsg[] = "Error: ncurses initialization failed\n";
+      auto r = write(STDERR_FILENO, errmsg, sizeof(errmsg) - 1);
+      static_cast<void>(r);
+      exit(1);
+    }
     noecho();             /* Echo off */
     cbreak();             /* nl- or cr not needed */
     keypad(stdscr, true); /* Use key symbols as KEY_DOWN */
@@ -124,7 +133,10 @@ int main(int argc, char const* const* argv)
     cmCursesForm::DebugStart();
   }
 
-  initscr();            /* Initialization */
+  if (initscr() == nullptr) {
+    fprintf(stderr, "Error: ncurses initialization failed\n");
+    exit(1);
+  }
   noecho();             /* Echo off */
   cbreak();             /* nl- or cr not needed */
   keypad(stdscr, true); /* Use key symbols as KEY_DOWN */
-- 
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