Ctrl-Z hang

Ctrl-Z hang

[Jon Dattorro]

I notice that cygwin hangs permanently when "man <some_command>" is
invoked and then Ctrl-z (suspended) after viewing a few pages.  This bug
is intermittent.

Jon

Computer:  Dell Inspiron 5000e laptop under CYGWIN DLL-version 1.1.6
Processor: GenuineIntel Family 6 Model 8 746 MHz Stepping 3
BIOS:      PhoenixBIOS 4.0 Release 6.0, 08/24/00
Memory:    255 MB  (39% Utilized)
Windows:   5.0 (Build 2195) (Windows 2000, Service Pack 1)


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Re: Ctrl-Z hang

[Christopher Faylor]

On Mon, Jan 01, 2001 at 10:13:01PM -0800, Jon Dattorro wrote:
>I notice that cygwin hangs permanently when "man <some_command>" is
>invoked and then Ctrl-z (suspended) after viewing a few pages.  This bug
>is intermittent.

This should be fixed in tonight's snapshot.

It was an interesting problem.  I didn't see the problem on my normal
test machine but it failed repeatedly on my laptop.  What was happening
was that a CTRL-Z would send a SIGTSTP to less which would dutifully
process it.  bash would step in and grab the tty back from less and
*sometimes* less would still be in the process of reading from the tty.
This would generate a SIGTTIN,, which would confuse less and cause a
hang.

So, cygwin no longer will send itself a SIGTTIN in this scenario.

It also no longer queues STOP signals which was another problem.

cgf

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