Verify ioctl return value in jansi

jline · Mar 8, 2023 · f3fa703 · f3fa703
1 parent 362b233
commit f3fa703
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/terminal-jansi/src/main/java/org/jline/terminal/impl/jansi/JansiNativePty.java b/terminal-jansi/src/main/java/org/jline/terminal/impl/jansi/JansiNativePty.java
@@ -143,14 +143,20 @@ protected void doSetAttr(Attributes attr) throws IOException {
     @Override
     public Size getSize() throws IOException {
         CLibrary.WinSize sz = new CLibrary.WinSize();
-        CLibrary.ioctl(slave, CLibrary.TIOCGWINSZ, sz);
+        int res = CLibrary.ioctl(slave, CLibrary.TIOCGWINSZ, sz);
+        if (res != 0) {
+            throw new IOException("Error calling ioctl(TIOCGWINSZ): return code is " + res);
+        }
         return new Size(sz.ws_col, sz.ws_row);
     }
 
     @Override
     public void setSize(Size size) throws IOException {
         CLibrary.WinSize sz = new CLibrary.WinSize((short) size.getRows(), (short) size.getColumns());
-        CLibrary.ioctl(slave, CLibrary.TIOCSWINSZ, sz);
+        int res = CLibrary.ioctl(slave, CLibrary.TIOCSWINSZ, sz);
+        if (res != 0) {
+            throw new IOException("Error calling ioctl(TIOCSWINSZ): return code is " + res);
+        }
     }
 
     protected abstract CLibrary.Termios toTermios(Attributes t);