Re: [gentoo-dev] [fyi] lddtree magic

[Samuli Suominen <ssuominen@gentoo.org>]

On 09/04/13 23:41, Samuli Suominen wrote:
> On 09/04/13 22:31, Mike Frysinger wrote:
>> i doubt few people have noticed, but i've rewritten lddtree recently in
>> python.  i did for speed, for fun, and to add a lot more functionality
>> that
>> would have driven the bash code base to new perverse levels.
>>
>> i've randomly stumbled across places in our code base (beyond ebuilds)
>> where
>> the new python version would be useful.  rather than try and ferret
>> out those
>> myself, i'll just announce here and people can sort it out.
>>
>> if you guys think this can satisfy most of your needs but there's like
>> a small
>> edge case that isn't quite handled, let me know.  i can always add
>> another
>> option :).
>>
>> specifically, lddtree (both the shell & python variants) support a
>> --list:
>> $ lddtree -l /bin/bash
>
> $ qfile -v /usr/bin/lddtree
> app-misc/pax-utils-0.6 (/usr/bin/lddtree)
>
> $ python --version
> Python 3.2.3
>
> $ lddtree -l /bin/bash
> Traceback (most recent call last):
>    File "/usr/bin/lddtree", line 450, in <module>
>      sys.exit(main(sys.argv))
>    File "/usr/bin/lddtree", line 437, in main
>      elf = ParseELF(path, options.root, ldpaths)
>    File "/usr/bin/lddtree", line 235, in ParseELF
>      elf = ELFFile(f)
>    File "/usr/lib64/python3.2/site-packages/elftools/elf/elffile.py",
> line 47, in __init__
>      self._identify_file()
>    File "/usr/lib64/python3.2/site-packages/elftools/elf/elffile.py",
> line 177, in _identify_file
>      magic = self.stream.read(4)
>    File "/usr/lib64/python3.2/codecs.py", line 300, in decode
>      (result, consumed) = self._buffer_decode(data, self.errors, final)
> UnicodeDecodeError: 'utf-8' codec can't decode byte 0x83 in position 25:
> invalid start byte
>
> $ locale
> LANG=en_US.UTF-8
> LC_CTYPE=fi_FI.UTF-8
> LC_NUMERIC="en_US.UTF-8"
> LC_TIME=en_GB.UTF-8
> LC_COLLATE="en_US.UTF-8"
> LC_MONETARY="en_US.UTF-8"
> LC_MESSAGES="en_US.UTF-8"
> LC_PAPER="en_US.UTF-8"
> LC_NAME="en_US.UTF-8"
> LC_ADDRESS="en_US.UTF-8"
> LC_TELEPHONE="en_US.UTF-8"
> LC_MEASUREMENT="en_US.UTF-8"
> LC_IDENTIFICATION="en_US.UTF-8"
> LC_ALL=

$ LC_ALL=C lddtree -l /bin/bash
Traceback (most recent call last):
   File "/usr/bin/lddtree", line 450, in <module>
     sys.exit(main(sys.argv))
   File "/usr/bin/lddtree", line 437, in main
     elf = ParseELF(path, options.root, ldpaths)
   File "/usr/bin/lddtree", line 235, in ParseELF
     elf = ELFFile(f)
   File "/usr/lib64/python3.2/site-packages/elftools/elf/elffile.py", 
line 47, in __init__
     self._identify_file()
   File "/usr/lib64/python3.2/site-packages/elftools/elf/elffile.py", 
line 177, in _identify_file
     magic = self.stream.read(4)
   File "/usr/lib64/python3.2/encodings/ascii.py", line 26, in decode
     return codecs.ascii_decode(input, self.errors)[0]
UnicodeDecodeError: 'ascii' codec can't decode byte 0x83 in position 25: 
ordinal not in range(128)