mirror of
https://github.com/isjerryxiao/pacroller.git
synced 2024-11-22 15:50:43 +08:00
replace old readline mechanism with a new one since ld_proload is clearly not the way forward
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parent
7d2d3caee2
commit
6169a637bf
2 changed files with 81 additions and 37 deletions
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@ -161,7 +161,7 @@ def do_system_upgrade(debug=False, interactive=False) -> checkReport:
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stdout_handler = logging.handlers.RotatingFileHandler(LOG_DIR / "stdout.log", mode='a',
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maxBytes=10*1024**2, backupCount=2)
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stdout_handler.setFormatter(_formatter)
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stdout_handler.setLevel(logging.DEBUG)
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stdout_handler.setLevel(logging.DEBUG+1)
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except Exception:
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logging.exception(f"unable to save stdout to {LOG_DIR}")
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stdout_handler = None
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@ -296,6 +296,7 @@ def main() -> None:
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args = parser.parse_args()
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_log_format = '%(asctime)s - %(module)s - %(funcName)s - %(levelname)s - %(message)s' if args.debug else '%(levelname)s - %(message)s'
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logging.basicConfig(level=logging.DEBUG, format=_log_format)
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logging.addLevelName(logging.DEBUG+1, 'DEBUG+1')
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if not args.debug:
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assert len(logger.handlers) == 1
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logger.handlers[0].setLevel(logging.INFO)
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@ -1,16 +1,23 @@
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import subprocess
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from threading import Thread
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import logging
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from typing import List, BinaryIO, Iterator, Union
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from typing import List, BinaryIO, Iterator, Union, Callable
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from io import DEFAULT_BUFFER_SIZE
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from time import mktime
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from datetime import datetime
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from signal import SIGINT, SIGTERM, Signals
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from select import select
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from sys import stdin
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from os import environ
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from os import set_blocking, close as os_close
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from pty import openpty
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from re import compile
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logger = logging.getLogger()
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ANSI_ESCAPE = compile(r'\x1B(?:[@-Z\\-_]|\[[0-?]*[ -/]*[@-~])')
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# https://stackoverflow.com/questions/14693701/how-can-i-remove-the-ansi-escape-sequences-from-a-string-in-python
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# 0a, 0d and 1b need special process
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GENERAL_NON_PRINTABLE = {b'\x07', b'\x08', b'\x09', b'\x0b', b'\x0c', b'\x7f'}
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class UnknownQuestionError(subprocess.SubprocessError):
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def __init__(self, question, output=None):
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self.question = question
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@ -30,7 +37,7 @@ def execute_with_io(command: List[str], timeout: int = 3600, interactive: bool =
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except subprocess.TimeoutExpired:
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logger.critical(f'unable to terminate {p}, killing')
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p.kill()
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def set_timeout(p: subprocess.Popen, timeout: int) -> None:
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def set_timeout(p: subprocess.Popen, timeout: int, callback: Callable = lambda: None) -> None:
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try:
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p.wait(timeout=timeout)
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except subprocess.TimeoutExpired:
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@ -38,45 +45,81 @@ def execute_with_io(command: List[str], timeout: int = 3600, interactive: bool =
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terminate(p)
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else:
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logger.debug('set_timeout exit')
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linebuf_env = dict(environ)
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linebuf_env['_STDBUF_O'] = 'L'
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linebuf_env['_STDBUF_E'] = 'L'
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linebuf_env['LD_PRELOAD'] = '/usr/lib/coreutils/libstdbuf.so'
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finally:
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callback()
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ptymaster, ptyslave = openpty()
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set_blocking(ptymaster, False)
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stdout = open(ptymaster, "rb", buffering=0)
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stdin = open(ptymaster, "w")
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p = subprocess.Popen(
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command,
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT,
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encoding='utf-8',
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env=linebuf_env
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)
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logger.debug(f"running {command}")
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stdin=ptyslave,
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stdout=ptyslave,
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stderr=ptyslave,
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)
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logger.log(logging.DEBUG+1, f"running {command}")
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try:
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Thread(target=set_timeout, args=(p, timeout), daemon=True).start()
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line = ''
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def cleanup():
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actions = (
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(stdin, "close"),
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(stdout, "close"),
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(ptymaster, os_close),
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(ptyslave, os_close),
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)
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for obj, action in actions:
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try:
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if isinstance(action, str):
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getattr(obj, action)()
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else:
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action(obj)
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except OSError:
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pass
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Thread(target=set_timeout, args=(p, timeout, cleanup), daemon=True).start()
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output = ''
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while (r := p.stdout.read(1)) != '':
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output += r
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line += r
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if r == '\n':
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logger.debug('STDOUT: %s', line[:-1])
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line = ''
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if line == ':: Proceed with installation? [Y/n]':
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p.stdin.write('y\n')
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p.stdin.flush()
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elif line.lower().endswith('[y/n]') or line == 'Enter a number (default=1): ':
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if interactive:
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choice = ask_interactive_question(line, info=output)
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if choice is None:
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while p.poll() is None:
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try:
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select([ptymaster], list(), list())
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_raw = stdout.read()
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except (OSError, ValueError):
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# should be cleanup routine closed the fd, lets check the process return code
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continue
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if not _raw:
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logger.debug('read void from stdout')
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continue
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logger.debug(f"raw stdout: {_raw}")
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for b in GENERAL_NON_PRINTABLE:
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_raw = _raw.replace(b, b'')
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need_attention = b'\x1b[?25h' in _raw
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raw = _raw.decode('utf-8', errors='replace')
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raw = raw.replace('\r\n', '\n')
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raw = ANSI_ESCAPE.sub('', raw)
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output += raw
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rawl = (raw[:-1] if raw.endswith('\n') else raw).split('\n')
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for l in rawl:
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logger.log(logging.DEBUG+1, 'STDOUT: %s', l)
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rstrip1 = lambda x: x[:-1] if x.endswith(' ') else x
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for l in rawl:
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line = rstrip1(l)
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if line == ':: Proceed with installation? [Y/n]':
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need_attention = False
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stdin.write('y\n')
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stdin.flush()
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elif line.lower().endswith('[y/n]') or line == 'Enter a number (default=1):':
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need_attention = False
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if interactive:
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choice = ask_interactive_question(line, info=output)
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if choice is None:
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terminate(p, signal=SIGINT)
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raise UnknownQuestionError(line, output)
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elif choice:
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stdin.write(f"{choice}\n")
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stdin.flush()
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else:
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terminate(p, signal=SIGINT)
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raise UnknownQuestionError(line, output)
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elif choice:
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p.stdin.write(f"{choice}\n")
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p.stdin.flush()
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else:
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terminate(p, signal=SIGINT)
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raise UnknownQuestionError(line, output)
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except KeyboardInterrupt:
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if need_attention and raw:
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raise UnknownQuestionError("<caused by show cursor sequence>", output)
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except (KeyboardInterrupt, UnknownQuestionError):
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terminate(p, signal=SIGINT)
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raise
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except Exception:
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