tests/ls-l.py

rust-cpython: mark unsafe functions as such

It wasn't trivial to fix leak_immutable() to be safe since we have to
allow immutable operations (e.g. iter()) on the leaked reference. So
let's mark it unsafe for now. Callers must take care of the returned
object to guarantee the memory safety.

I'll revisit this later. I think $leaked<T: 'static> could have a function
that converts itself into $leaked<U: 'static> with a given FnOnce(&T) -> &U,
where T is $inner_struct, and U is $iterator_type for example.

#!/usr/bin/env python

# like ls -l, but do not print date, user, or non-common mode bit, to avoid
# using globs in tests.
from __future__ import absolute_import, print_function

import os
import stat
import sys

def modestr(st):
    mode = st.st_mode
    result = ''
    if mode & stat.S_IFDIR:
        result += 'd'
    else:
        result += '-'
    for owner in ['USR', 'GRP', 'OTH']:
        for action in ['R', 'W', 'X']:
            if mode & getattr(stat, 'S_I%s%s' % (action, owner)):
                result += action.lower()
            else:
                result += '-'
    return result

def sizestr(st):
    if st.st_mode & stat.S_IFREG:
        return '%7d' % st.st_size
    else:
        # do not show size for non regular files
        return ' ' * 7

os.chdir((sys.argv[1:] + ['.'])[0])

for name in sorted(os.listdir('.')):
    st = os.stat(name)
    print('%s %s %s' % (modestr(st), sizestr(st), name))