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Re: ncftp - works, but doesn't display any prompts
On Thu, Jan 25, 2001 at 04:09:09PM +0100, Corinna Vinschen wrote:
>On Wed, Jan 24, 2001 at 07:52:40PM -0500, Charles Wilson wrote:
>> This is a bug in ncftp or cygwin. If ncftp determines that it is not
>> running from a TTY, it doesn't print any prompts. Here's the code that
>> it uses to determine that (ncftp/main.c):
>>
>> gIsTTY = ((isatty(2) != 0) && (getppid() > 1)) ? 1 : 0;
>> gIsTTYr = ((isatty(0) != 0) && (getppid() > 1)) ? 1 : 0;
>>
>> Here's the result of those operations in a bash window:
>> isatty(2) = 1
>> isatty(0) = 1
>> getppid() = 1764
>> gIsTTY = 1
>> gIsTTYr = 1
>>
>> And from a cmd prompt:
>> isatty(2) = 1
>> isatty(0) = 1
>> getppid() = 1
>> gIsTTY = 0
>> gIsTTYr = 0
>>
>> I'm not sure what the right fix is. Options:
>> 1) Is this really a problem with the getppid implementation of cygwin
>> (?)
>> 2) patch ncftp to ignore the value of getppid() -- just use isatty(x)
>> --> #ifdef __CYGWIN__, or for all platforms? Why does ncftp test
>> getppid() anyway?
>
>1) "No" from my point of view. A processes parent is set to PID 1 if
> it's parent process isn't known by Cygwin - eg. is a native Windows
> process. Windows is treated being `init'.
>
>2) That's the solution I would prefer. The check is senseless under
> Cygwin.
Actually, I think it is pretty senseless in general.
cgf
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