RFA: infptrace fix

[J. Johnston]

Kevin Buettner wrote:
> On Feb 24,  6:31pm, J. Johnston wrote:
> 
> 
>>The following patch fixes a problem on linux regarding attached
>>processes.  When gdb quits, it goes to detach the process.  If the
>>process has already been killed, the ptrace detach call sets errno.
>>This causes infptrace.c: detach() to issue a perror_with_name()
>>call which eventually gets caught and the user is returned to the
>>gdb prompt.  If we try and quit again, we go through the same
>>sequence and so on and so on.
>>
>>The patch recognizes if errno is set to ESRCH, indicating that the
>>process cannot be found which is ok and should not result in an
>>error being flagged.
>>
>>Ok to install?
>>
>>
>>-- Jeff J.
>>
>>2003-02-24  Jeff Johnston  <jjohnstn@redhat.com>
>>
>>	* infptrace.c (detach): Do not flag error if ptrace detach fails and
>>	errno is set to ESRCH.
> 
> 
> This is okay.
> 
> (For other errors during detach, I wonder if it'd make sense to just
> issue a warning which decodes the errno...)
>

Thanks Kevin.  Patch applied.  I also wondered if a warning should be issued
but I do not know what other errors can occur with the detach operation.  I
also considered moving the attached_flag reset to before the error check so
at least we didn't come back to detach it again and again.

-- Jeff J.