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Re: Seg Fault while using /dev/clipboard


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

-- 
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     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
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