Eryk Sun <[email protected]> added the comment:
Console input handles pose the same risk of hanging indefinitely when io.FileIO
is used in legacy standard I/O mode (i.e. PYTHONLEGACYWINDOWSSTDIO).
Seeking could simply be disallowed on all files that aren't FILE_TYPE_DISK. For
example, change portable_lseek() in Modules/_io/fileio.c to check the file type:
if (GetFileType((HANDLE)_get_osfhandle(fd)) != FILE_TYPE_DISK) {
errno = ESPIPE;
res = -1;
} else {
res = _lseeki64(fd, pos, whence);
}
----------
versions: +Python 3.10 -Python 3.7
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<https://bugs.python.org/issue34780>
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