119 lines
2.6 KiB
Python
119 lines
2.6 KiB
Python
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#!/usr/bin/env python3
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#
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# Cross Platform and Multi Architecture Advanced Binary Emulation Framework
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#
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import io
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import os
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from qiling.os.posix import stat
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class SimpleStringBuffer(io.BytesIO):
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"""Simple FIFO pipe.
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"""
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def __init__(self):
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super().__init__()
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# Compatible with old implementation
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def seek(self, offset: int, origin: int = 0) -> int:
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# Imitate os.lseek
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raise OSError("Illega Seek")
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def seekable(self) -> bool:
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return False
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def write(self, buf: bytes) -> int:
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# For the FIFO stream, the write doesn't change pos.
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pos = super().tell()
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super().seek(0, os.SEEK_END)
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ret = super().write(buf)
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super().seek(pos)
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return ret
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# Compatible with previous TextIO
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@property
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def name(self):
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return None
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class SimpleStreamBase:
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def __init__(self, fd: int):
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super().__init__()
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self.__fd = fd
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self.__closed = False
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def close(self) -> None:
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self.__closed = True
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@property
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def closed(self) -> bool:
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return self.__closed
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def fileno(self) -> int:
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return self.__fd
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def fstat(self):
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return stat.Fstat(self.fileno())
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class SimpleInStream(SimpleStreamBase, SimpleStringBuffer):
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"""Simple input stream. May be used to mock stdin.
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"""
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pass
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class SimpleOutStream(SimpleStreamBase, SimpleStringBuffer):
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"""Simple output stream. May be used to mock stdout or stderr.
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"""
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pass
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class NullOutStream(SimpleStreamBase):
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"""Null out-stream, may be used to disregard process output.
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"""
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def write(self, s: bytes) -> int:
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return len(s)
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def flush(self) -> None:
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pass
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def writable(self) -> bool:
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return True
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class SimpleBufferedStream(io.BytesIO):
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"""Simple buffered IO.
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"""
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def __init__(self):
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super().__init__()
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class InteractiveInStream(io.BytesIO):
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def read(self, size: int) -> bytes:
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'''
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Read from the BytesIO buffer. If theres no data left in the buffer, get additional user input
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Args:
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size (int): The amount of bytes to read from the buffer
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Returns:
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bytes: The data read from the buffer
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'''
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# get the amount of bytes left in the buffer
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bytes_left = self.getbuffer().nbytes - self.tell()
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# if theres no bytes left in the buffer, get user input
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if bytes_left == 0:
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user_data = input().encode() + b'\x0a'
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self.write(user_data)
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self.seek(-len(user_data), io.SEEK_CUR)
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return super().read(size)
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