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Mail Archives: cygwin/2005/03/04/11:56:18

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Date: Fri, 4 Mar 2005 11:55:21 -0500 (EST)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Pat Kane <pat AT prairienet DOT org>
cc: cygwin AT cygwin DOT com
Subject: Re: Seg Fault while using /dev/clipboard
In-Reply-To: <4228705D.1000700@prairienet.org>
Message-ID: <Pine.GSO.4.61.0503041136350.15210@slinky.cs.nyu.edu>
References: <4228705D DOT 1000700 AT prairienet DOT org>
MIME-Version: 1.0

On Fri, 4 Mar 2005, Pat Kane wrote:

> I am having problems using /dev/clipboard.  When there is a text
> selection on the Windows clipboard things work as expected, but if
> there is some other type of selection I get:   "Segmentation fault (core
> dumped)"
>
> To duplicate the problem try:       cat  /dev/clipboard
> first with a text selection and then after using Windows to copy a program
> (right click, copy),
> or after taking a screen  snapshot (cntrl-alt-prntScrn).
>
> I am using Cygwin DLL 1.5.13-1  on Win2k V5 SP4,

Ok, I can reproduce this on WinXP Pro SP1.  The last few lines of strace
before the exception[*] show a read call that executes normally, and then
a SEGV.  Someone with a debug version of Cygwin should be able to trace
through this in gdb.

> below is the output of cygcheck.

In the future, please *attach* the output of cygcheck instead of including
it inline, to avoid false positives in archive searches.  Thanks,
	Igor
[*] Here is a relevant (IMO) snippet of the strace:
  115   31208 [main] cat 9200 build_fh_pc: fh 0x61791454
   42   31250 [main] cat 9200 fhandler_base::set_flags: flags 0x20000, supplied_bin 0x0
   35   31285 [main] cat 9200 fhandler_base::set_flags: O_TEXT/O_BINARY set in flags 0x20000
   33   31318 [main] cat 9200 fhandler_base::set_flags: filemode set to text
   32   31350 [main] cat 9200 open: 3 = open (/dev/clipboard, 0x0)
   33   31383 [main] cat 9200 fhandler_base::fstat: here
   35   31418 [main] cat 9200 fstat64: 0 = fstat (3, 0x22EF30)
   70   31488 [main] cat 9200 readv: readv (3, 0x22EE40, 1) blocking, sigcatchers 0
   43   31531 [main] cat 9200 readv: no need to call ready_for_read
   84   31615 [main] cat 9200 handle_exceptions: In cygwin_except_handler exc 0xC0000005 at 0x610D3F51 sp 0x22ED24
   37   31652 [main] cat 9200 handle_exceptions: In cygwin_except_handler sig 11 at 0x610D3F51

-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

"The Sun will pass between the Earth and the Moon tonight for a total
Lunar eclipse..." -- WCBS Radio Newsbrief, Oct 27 2004, 12:01 pm EDT

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