1 files changed, 82 insertions, 0 deletions
diff --git a/contrib/tools/python3/Lib/_pyrepl/fancy_termios.py b/contrib/tools/python3/Lib/_pyrepl/fancy_termios.py
new file mode 100644
index 00000000000..8d5bd183f21
--- /dev/null
+++ b/contrib/tools/python3/Lib/_pyrepl/fancy_termios.py
@@ -0,0 +1,82 @@
+#   Copyright 2000-2004 Michael Hudson-Doyle <[email protected]>
+#
+#                        All Rights Reserved
+#
+#
+# Permission to use, copy, modify, and distribute this software and
+# its documentation for any purpose is hereby granted without fee,
+# provided that the above copyright notice appear in all copies and
+# that both that copyright notice and this permission notice appear in
+# supporting documentation.
+#
+# THE AUTHOR MICHAEL HUDSON DISCLAIMS ALL WARRANTIES WITH REGARD TO
+# THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+# AND FITNESS, IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL,
+# INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
+# RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
+# CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+import termios
+
+
+TYPE_CHECKING = False
+
+if TYPE_CHECKING:
+    from typing import cast
+else:
+    cast = lambda typ, val: val
+
+
+class TermState:
+    def __init__(self, attrs: list[int | list[bytes]]) -> None:
+        self.iflag = cast(int, attrs[0])
+        self.oflag = cast(int, attrs[1])
+        self.cflag = cast(int, attrs[2])
+        self.lflag = cast(int, attrs[3])
+        self.ispeed = cast(int, attrs[4])
+        self.ospeed = cast(int, attrs[5])
+        self.cc = cast(list[bytes], attrs[6])
+
+    def as_list(self) -> list[int | list[bytes]]:
+        return [
+            self.iflag,
+            self.oflag,
+            self.cflag,
+            self.lflag,
+            self.ispeed,
+            self.ospeed,
+            # Always return a copy of the control characters list to ensure
+            # there are not any additional references to self.cc
+            self.cc[:],
+        ]
+
+    def copy(self) -> "TermState":
+        return self.__class__(self.as_list())
+
+
+def tcgetattr(fd: int) -> TermState:
+    return TermState(termios.tcgetattr(fd))
+
+
+def tcsetattr(fd: int, when: int, attrs: TermState) -> None:
+    termios.tcsetattr(fd, when, attrs.as_list())
+
+
+class Term(TermState):
+    TS__init__ = TermState.__init__
+
+    def __init__(self, fd: int = 0) -> None:
+        self.TS__init__(termios.tcgetattr(fd))
+        self.fd = fd
+        self.stack: list[list[int | list[bytes]]] = []
+
+    def save(self) -> None:
+        self.stack.append(self.as_list())
+
+    def set(self, when: int = termios.TCSANOW) -> None:
+        termios.tcsetattr(self.fd, when, self.as_list())
+
+    def restore(self) -> None:
+        self.TS__init__(self.stack.pop())
+        self.set()