Mail Archives: cygwin/2009/05/29/11:43:36
IWAMURO Motonori wrote:
> The encoding of C locale is ASCII, and not ISO-8859-1.
> I don't think ASCII is the same as ISO-8859-1.
> Does it work on LANG=en_US.ISO-8859-1?
No, it doesn't. Mind you though, I haven't managed to get piconv to
recognize any of my LANG settings other than C in cygwin 1.7.
$ export LANG=LANG=en_US.ISO-8859-1
$ piconv
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LC_ALL = (unset),
LANG = "LANG=en_US.ISO-8859-1"
are supported and installed on your system.
(... usage omitted...)
$ ./bug arg1 "before `cat copyright.txt` after" arg3
0: E:\cygwin1.7\tmp\bug.exe
1: arg1
2: before
Regards,
-Edward
> 2009/5/29 Edward Lam <edward AT sidefx DOT com>:
>> Alexey Borzenkov wrote:
>>> On Thu, May 28, 2009 at 7:28 PM, Edward Lam <edward AT sidefx DOT com> wrote:
>>>> PS. In case you haven't noticed, copyright.txt is not a long file. It
>>>> consists of a single byte, 0xA9.
>>> Did you try utf-8 encoding copyright.txt? Perhaps your locale is utf-8
>>> and the encoder fails.
>> How is one supposed to determine one's locale in cygwin? I do NOT have LANG,
>> or any of the LC environment variables set. I even tried explicitly setting
>> LANG=C and it still fails.
>>
>> The problem does seem to stem from the new UTF-8 support in cygwin 1.7.
>> However, I think something is going on here that is unexpected because
>> trying something similar on Linux has no problems. To confirm that it was an
>> UTF-8 related problem, let me repeat the steps slightly differently again.
>> Here we assume that I've already got bug.exe compiled which simply prints
>> out its arguments.
>>
>> $ export LANG=C
>>
>> $ ./bug arg1 "before `cat copyright.txt` after" arg3
>> 0: E:\cygwin1.7\tmp\bug.exe
>> 1: arg1
>> 2: before
>>
>> *Notice that argc is 3 when it should be 4!*
>>
>> $ piconv -f iso-8859-1 -t utf8 < copyright.txt > fubar.txt
>>
>> $ ./bug arg1 "before `cat fubar.txt` after" arg3
>> 0: E:\cygwin1.7\tmp\bug.exe
>> 1: arg1
>> 2: before © after
>> 3: arg3
>>
>> *So now everything works because I converted the character into UTF-8.*
>>
>> I think what this points to is some form of invalid source encoding of the
>> command line argument when spawning NATIVE applications.
>>
>> Here's what happens when I try to compile bug.c using cygwin's gcc:
>>
>> $ gcc bug.c -o bug-gcc.exe
>>
>> $ ./bug-gcc arg1 "before `cat copyright.txt` after" arg3
>> 0: ./bug-gcc
>> 1: arg1
>> 2: before © after
>> 3: arg3
>>
>> So there seems to be some sort of special marshaling of the command line
>> arguments that only works when spawning cygwin apps, but breaks when running
>> under native apps.
>>
>> Regards,
>> -Edward
>>
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