120 lines
3.8 KiB
Plaintext
120 lines
3.8 KiB
Plaintext
import os
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import struct
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import sys
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import pty
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import tty
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import termios
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import shlex
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import signal
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import select
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import pyte
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import time
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class Terminal:
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def __init__(self, columns, lines, p_in):
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self.screen = pyte.HistoryScreen(columns, lines)
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self.screen.set_mode(pyte.modes.LNM)
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self.screen.write_process_input = \
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lambda data: p_in.write(data.encode())
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self.stream = pyte.ByteStream()
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self.stream.attach(self.screen)
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def feed(self, data):
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self.stream.feed(data)
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def dump(self):
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cursor = self.screen.cursor
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lines = []
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for y in self.screen.dirty:
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line = self.screen.buffer[y]
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data = [(char.data, char.reverse, char.fg, char.bg)
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for char in (line[x] for x in range(self.screen.columns))]
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lines.append((y, data))
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self.screen.dirty.clear()
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return {"c": (cursor.x, cursor.y), "lines": lines}
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def open_terminal(command="bash", columns=80, lines=24):
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p_pid, master_fd = pty.fork()
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if p_pid == 0: # Child.
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argv = shlex.split(command)
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env = os.environ.copy()
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env["TERM"] = 'vt100'
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os.execvpe(argv[0], argv, env)
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# File-like object for I/O with the child process aka command.
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p_out = os.fdopen(master_fd, "w+b", 0)
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return Terminal(columns, lines, p_out), p_pid, p_out
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def HandleTerminal():
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debug = False
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running = True
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try:
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old_attr = termios.tcgetattr(sys.stdin)
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tty.setraw(0)
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terminal, p_pid, p_out = open_terminal()
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std_out = os.fdopen(sys.stdout.fileno(), "w+b", 0)
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while running:
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r, w, x = select.select([sys.stdin, p_out],[],[])
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if r == []:
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continue
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if p_out in r:
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if debug:
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print('pre p_out')
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try:
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msgBytes = read_all(p_out.fileno())
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except (EOFError, OSError):
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running = False
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break
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terminal.feed(msgBytes)
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os.write(sys.stdout.fileno(), msgBytes)
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if debug:
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print('after p_out')
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if sys.stdin in r:
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if debug:
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print('pre stdin')
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try:
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msgBytes = read_all(sys.stdin.fileno())
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except (EOFError, OSError):
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running = False
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break
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terminal.feed(msgBytes)
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os.write(p_out.fileno(), msgBytes)
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if debug:
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print('after stdin')
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except Exception as e: # Process died?
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print(e)
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running = False
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finally:
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os.kill(p_pid, signal.SIGTERM)
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p_out.close()
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termios.tcsetattr(sys.stdin, termios.TCSADRAIN, old_attr)
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sys.exit(0)
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def get_terminal_size(fd):
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s = struct.pack('HHHH', 0, 0, 0, 0)
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rows, cols, _, _ = struct.unpack('HHHH', fcntl.ioctl(fd, termios.TIOCGWINSZ, s))
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return rows, cols
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def resize_terminal(fd):
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s = struct.pack('HHHH', 0, 0, 0, 0)
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s = fcntl.ioctl(0, termios.TIOCGWINSZ, s)
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fcntl.ioctl(fd, termios.TIOCSWINSZ, s)
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rows, cols, _, _ = struct.unpack('hhhh', s)
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return rows, cols
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def read_all(fd):
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bytes = os.read(fd, 65536)
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if bytes == b'':
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raise EOFError
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while has_more(fd):
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data = os.read(fd, 65536)
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if data == b'':
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raise EOFError
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bytes += data
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return bytes
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def has_more(fd):
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r, w, e = select.select([fd], [], [], 0)
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return (fd in r)
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if __name__ == "__main__":
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HandleTerminal()
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