Fix UnsupportedOperation: fileno in suppress_stdout_stderr (ggml-org#961)

* bug fixing

* llava from readme got this error: UnsupportedOperation: fileno   quick fix by checking hasattr

* multi modal params fix: add logits = True -> to make llava work

* multi modal params fix: add logits = True -> to make llava work

---------

Co-authored-by: Andrei <[email protected]>

Author: zocainViken

llama_cpp/_utils.py

@@ -17,14 +17,18 @@ def __enter__(self):
         if self.disable:
             return self
 
+        # Check if sys.stdout and sys.stderr have fileno method
+        if not hasattr(self.sys.stdout, 'fileno') or not hasattr(self.sys.stderr, 'fileno'):
+            return self  # Return the instance without making changes
+
         self.outnull_file = self.open(self.os.devnull, "w")
         self.errnull_file = self.open(self.os.devnull, "w")
 
         self.old_stdout_fileno_undup = self.sys.stdout.fileno()
         self.old_stderr_fileno_undup = self.sys.stderr.fileno()
 
-        self.old_stdout_fileno = self.os.dup(self.sys.stdout.fileno())
-        self.old_stderr_fileno = self.os.dup(self.sys.stderr.fileno())
+        self.old_stdout_fileno = self.os.dup(self.old_stdout_fileno_undup)
+        self.old_stderr_fileno = self.os.dup(self.old_stderr_fileno_undup)
 
         self.old_stdout = self.sys.stdout
         self.old_stderr = self.sys.stderr
@@ -40,14 +44,16 @@ def __exit__(self, *_):
         if self.disable:
             return
 
-        self.sys.stdout = self.old_stdout
-        self.sys.stderr = self.old_stderr
+        # Check if sys.stdout and sys.stderr have fileno method
+        if hasattr(self.sys.stdout, 'fileno') and hasattr(self.sys.stderr, 'fileno'):
+            self.sys.stdout = self.old_stdout
+            self.sys.stderr = self.old_stderr
 
-        self.os.dup2(self.old_stdout_fileno, self.old_stdout_fileno_undup)
-        self.os.dup2(self.old_stderr_fileno, self.old_stderr_fileno_undup)
+            self.os.dup2(self.old_stdout_fileno, self.old_stdout_fileno_undup)
+            self.os.dup2(self.old_stderr_fileno, self.old_stderr_fileno_undup)
 
-        self.os.close(self.old_stdout_fileno)
-        self.os.close(self.old_stderr_fileno)
+            self.os.close(self.old_stdout_fileno)
+            self.os.close(self.old_stderr_fileno)
 
-        self.outnull_file.close()
-        self.errnull_file.close()
+            self.outnull_file.close()
+            self.errnull_file.close()