Re: startxwin.exe no longer exists?

2014-12-17 Thread mathog

On 16-Dec-2014 15:39, Erik Soderquist wrote:

My best guess (and this is only a guess) is that
something is causing X to crash as it shuts down on your system,
causing the lock files to be left behind.


There is no reason that should happen unless the startxwin script also 
crashes - and that basically should never happen.  The script should 
clean up any mess that the binary might leave, and it should handle all 
conditions that might result from some process it has started crashing.  
That is, in the script (pseudocode):


# If there is an existing lock file:
#   Test is there also an existing X11 binary process?
# yes - abort with message: X11 server already running
# no  - remove lock file
##
# do whatever housekeeping is needed
#   then start binary
/path/X11_server_binary $args
#no matter how binary exits...
rm /path/.X*lock

The only time a script might not have a chance to run the last command 
is if it starts the server via nohup binary , assuming such a thing 
is even possible in cygwin, and then exits without waiting around for 
the binary to exit.  Or, of course, if the whole system crashes, but 
that isn't the issue the end users are having.


Regards,

David Mathog
mat...@caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech

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Re: startxwin.exe no longer exists?

2014-12-17 Thread Erik Soderquist
snip
 There is no reason that should happen unless the startxwin script also
 crashes - and that basically should never happen.  The script should clean
 up any mess that the binary might leave, and it should handle all conditions
 that might result from some process it has started crashing.  That is, in
 the script (pseudocode):

 # If there is an existing lock file:
 #   Test is there also an existing X11 binary process?
 # yes - abort with message: X11 server already running
 # no  - remove lock file
 ##
 # do whatever housekeeping is needed
 #   then start binary
 /path/X11_server_binary $args
 #no matter how binary exits...
 rm /path/.X*lock

 The only time a script might not have a chance to run the last command is if
 it starts the server via nohup binary , assuming such a thing is even
 possible in cygwin, and then exits without waiting around for the binary to
 exit.  Or, of course, if the whole system crashes, but that isn't the issue
 the end users are having.

So you want your script to completely mask and/or destroy any evidence
that something crashed??  That is very counter-productive toward
anything resembling fixing a problem or even discovering a problem
exists.

Also, as the X server is not bound to a tty, it forks to the
background on its own anyway, so your pseudocode example would delete
the lock file just after the X server started.


 Regards,

 David Mathog


-- Erik

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Re: startxwin.exe no longer exists?

2014-12-17 Thread mathog

On 17-Dec-2014 09:40, Erik Soderquist wrote:

snip

There is no reason that should happen unless the startxwin script also
crashes - and that basically should never happen.  The script should 
clean
up any mess that the binary might leave, and it should handle all 
conditions
that might result from some process it has started crashing.  That is, 
in

the script (pseudocode):

# If there is an existing lock file:
#   Test is there also an existing X11 binary process?
# yes - abort with message: X11 server already running
# no  - remove lock file
##
# do whatever housekeeping is needed
#   then start binary
/path/X11_server_binary $args
#no matter how binary exits...
rm /path/.X*lock

The only time a script might not have a chance to run the last command 
is if
it starts the server via nohup binary , assuming such a thing is 
even
possible in cygwin, and then exits without waiting around for the 
binary to
exit.  Or, of course, if the whole system crashes, but that isn't the 
issue

the end users are having.


So you want your script to completely mask and/or destroy any evidence
that something crashed??


No, that is the log file, this is the lock file.  It should rotate the 
log file from the previous run and delete the lock file.




Also, as the X server is not bound to a tty, it forks to the
background on its own anyway, so your pseudocode example would delete
the lock file just after the X server started.


In that case the the script needs to retrieve the PID of the forked 
process and wait for it to exit.


Regards,

David Mathog
mat...@caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech

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Re: startxwin.exe no longer exists?

2014-12-17 Thread Erik Soderquist
snip
 So you want your script to completely mask and/or destroy any evidence
 that something crashed??


 No, that is the log file, this is the lock file.  It should rotate the log
 file from the previous run and delete the lock file.

How often do you check your log files for crashes when you have your
script hiding the fact that it crashed from you?



 Also, as the X server is not bound to a tty, it forks to the
 background on its own anyway, so your pseudocode example would delete
 the lock file just after the X server started.


 In that case the the script needs to retrieve the PID of the forked process
 and wait for it to exit.


I would much rather have the binary process clean up after itself like
it is supposed to, and figure out why the binary process is failing to
do so when it doesn't than have a script that hides such failures from
me.

To each its own though.

-- Erik

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Re: startxwin.exe no longer exists?

2014-12-17 Thread mathog

On 17-Dec-2014 10:35, Erik Soderquist wrote:


How often do you check your log files for crashes when you have your
script hiding the fact that it crashed from you?


Fine, have the script emit a warning when this situation is encountered. 
 Personally I have never seen the X11 server crash between shut down 
and removing the lock file.  I have seen it crash while running - and 
that was pretty evident since all my X11 windows disappeared, no need to 
look for a lock file!






Also, as the X server is not bound to a tty, it forks to the
background on its own anyway, so your pseudocode example would delete
the lock file just after the X server started.



In that case the the script needs to retrieve the PID of the forked 
process

and wait for it to exit.



I would much rather have the binary process clean up after itself like
it is supposed to, and figure out why the binary process is failing to
do so when it doesn't than have a script that hides such failures from
me.


Sure, the binary SHOULD work like that, but what others have said is 
that it is not always doing so.  Hence, the script should pick up the 
pieces if the binary failed to do so.  The script need not hide 
anything, it can emit warning messages on any and all conditions.  At 
start up:


  Found orphan lock file and removed it.  Possible crash during 
previous X11 server session.  Starting X11 server normally.


at shut down:

  X11 server process exited abnormally.  Orphan lock file removed.

etc.

Regards,

David Mathog
mat...@caltech.edu
Manager, Sequence Analysis Facility, Biology Division, Caltech

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Re: startxwin.exe no longer exists?

2014-12-16 Thread Mark Hansen

On 12/15/2014 6:49 PM, Will Parsons wrote:

Marco Atzeri wrote:


On 12/12/2014 7:07 PM, Will Parsons wrote:

For several years now I have been starting X windows by clicking on an
icon on my desktop that is a link to C:\cygwin\bin\startxwin.exe.  It
has recently ceased to work because apparently startxwin.exe no longer
exists.  Somehow I missed where this was removed, so what is the
recommended way of starting X from a desktop icon now?

I seem to recall that startxwin.exe was introduced some time ago
because using a script to start X was inadequate somehow, but I don't
remember the details, so what changed?


https://cygwin.com/ml/cygwin-xfree-announce/2014-11/msg4.html


OK - so what I get from that is that whatever problems were associated
with the original shell script have been solved and startxwin is now a
shell script again.  But, my basic question is unanswered - how do I
start an X session from an icon?  Obviously, simply replacing the link
to startxwin.exe to startxwin will not work, so I copied the shortcut
from the start menu to the desktop and tried it (after renaming my
.xinitrc and .startxwinrc files to avoid any problems with the change
of model).


Here is the content of the desktop shortcut that I use:

C:\Apps\cygwin\bin\run.exe /usr/bin/bash.exe -l -c /usr/bin/startxwin.exe -- 
-emulate3buttons 100 -multiwindow -clipboard -swcursor

I have this set to run when I log into the machine and it works fine.


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Re: startxwin.exe no longer exists?

2014-12-16 Thread rcunningham

On 12/16/2014 8:00 AM, Erik Soderquist wrote:

snip

Sure, display :0 is unavailable; checking DISPLAY in the (unwanted)
xterm shows DISPLAY is set to :5.  Why's that I wonder?

Further investigation shows ls -ltr /tmp:

-r--r--r--  1 william None 11 Nov 28 17:43 /tmp/.X0-lock
-r--r--r--  1 william None 11 Dec 13 17:43 /tmp/.X1-lock
-r--r--r--  1 william None 11 Dec 13 17:55 /tmp/.X2-lock
-r--r--r--  1 william None 11 Dec 13 19:22 /tmp/.X3-lock
-r--r--r--  1 william None 11 Dec 15 16:53 /tmp/.X4-lock
-r--r--r--  1 william None 11 Dec 15 17:00 /tmp/.X5-lock

Interesting.  It looks like every time I start an X session a lock
file is created and doesn't get deleted, so the display number keeps
changing.  This doesn't look right, so how do I avoid it?

--
Will

What I do is specify the display on the command line.  If it fails, I
check for an existing operational session with the same display.  If
it exists, I simply exit the script.  If not, I free the lock file and
retry the X server start on the chosen display.

-- Erik


Shouldn't the startxwin script check for running instances and delete 
all lock-files related to non-existent instances?  Why must this be a 
manual operation?



The prior startxwin.exe just worked, and this new replacement script 
is clearly creating problems for previously happy CygwinX users, where 
no problems existed before (or, at least the problems weren't visible 
and didn't affect normal use).


I would have preferred to have seen startxwin.exe retained, and this new 
script phased in gradually, perhaps as startxwin_new in the first 
release.  Then, when startxwin_new stabilizes, rename the executable to 
startxwin_old.exe and the script to startxwin. Several updates later, 
quietly remove startxwin_old.exe.


It seems nonsensical to treat all CygwinX users as alpha testers. I'm 
more than willing to help test new features, but not in the dark: Make 
it very clear when significant subsystems are being evolved, and provide 
a way to try the new without losing the old.


For now, can startxwin.exe be restored under some name?

-BobC


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Re: startxwin.exe no longer exists?

2014-12-16 Thread Erik Soderquist
snip

 Shouldn't the startxwin script check for running instances and delete all
 lock-files related to non-existent instances?  Why must this be a manual
 operation?

I generally recommend against automagic cleanup of lock files from
dead sessions being a general default because that also wipes out
warning that something went wrong.  I do it in my situation because I
have it on (essentially) dumb terminals where the session working is
much more important than knowing something went wrong, and the dumb
terminals are on flaky power, so most of the dead sessions are due to
power failure anyway.

 The prior startxwin.exe just worked, and this new replacement script is
 clearly creating problems for previously happy CygwinX users, where no
 problems existed before (or, at least the problems weren't visible and
 didn't affect normal use).

I actually have no experience with startxwin; I always called the X
server directly with the options I wanted.  However, I can say that
freeing of lock files is the job of the process that created the lock
files.  If you kill the process, stray lock files are a normal
expectation.

 I would have preferred to have seen startxwin.exe retained, and this new
 script phased in gradually, perhaps as startxwin_new in the first release.
 Then, when startxwin_new stabilizes, rename the executable to
 startxwin_old.exe and the script to startxwin. Several updates later,
 quietly remove startxwin_old.exe.

 It seems nonsensical to treat all CygwinX users as alpha testers. I'm more
 than willing to help test new features, but not in the dark: Make it very
 clear when significant subsystems are being evolved, and provide a way to
 try the new without losing the old.

The changes were announced, and the announcement already sited in this
thread.  Having read the announcement again, it looks like the
replacement has as one of its goals bringing the X system more in line
with general X and *nix standards, which, as far as I know, has always
been a general goal of the entire Cygwin set of projects.

 For now, can startxwin.exe be restored under some name?

 -BobC

That part I can't speak to except perhaps to pull it from an old
version.  I'm not part of the CygwinX team, and have no say in the
matter.

-- Erik

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Re: startxwin.exe no longer exists?

2014-12-16 Thread rcunningham

On 12/16/2014 9:06 AM, Erik Soderquist wrote:

snip


Shouldn't the startxwin script check for running instances and delete all
lock-files related to non-existent instances?  Why must this be a manual
operation?

I generally recommend against automagic cleanup of lock files from
dead sessions being a general default because that also wipes out
warning that something went wrong.  I do it in my situation because I
have it on (essentially) dumb terminals where the session working is
much more important than knowing something went wrong, and the dumb
terminals are on flaky power, so most of the dead sessions are due to
power failure anyway.


Then the script should provide a popup (via zenity, yad, dialog, or 
whatever) that informs the user that a prior session crashed, and offer 
a Continue/Abort choice.  Don't force casual X users to learn about 
lock-files.  By default, also provide a popup whenever a running server 
is detected, to avoid redundant servers being launched inadvertently.


Help normal users get on with their work, rather than providing a 
surprisingly different environment requiring specialized knowledge to 
resolve.



The prior startxwin.exe just worked, and this new replacement script is
clearly creating problems for previously happy CygwinX users, where no
problems existed before (or, at least the problems weren't visible and
didn't affect normal use).

I actually have no experience with startxwin; I always called the X
server directly with the options I wanted.  However, I can say that
freeing of lock files is the job of the process that created the lock
files.  If you kill the process, stray lock files are a normal
expectation.


Evidently, that isn't being done.  But the prior startxwin.exe never, in 
my experience, created the issues of the new startxwin script.



I would have preferred to have seen startxwin.exe retained, and this new
script phased in gradually, perhaps as startxwin_new in the first release.
Then, when startxwin_new stabilizes, rename the executable to
startxwin_old.exe and the script to startxwin. Several updates later,
quietly remove startxwin_old.exe.

It seems nonsensical to treat all CygwinX users as alpha testers. I'm more
than willing to help test new features, but not in the dark: Make it very
clear when significant subsystems are being evolved, and provide a way to
try the new without losing the old.

The changes were announced, and the announcement already sited in this
thread.  Having read the announcement again, it looks like the
replacement has as one of its goals bringing the X system more in line
with general X and *nix standards, which, as far as I know, has always
been a general goal of the entire Cygwin set of projects.


I never used this list until AFTER the update killed my previously 
stable CygwinX environment.


It is silly to expect all CygwinX users to actively monitor a list just 
to avoid getting their systems broken.


-BobC

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Re: startxwin.exe no longer exists?

2014-12-16 Thread Will Parsons
Erik Soderquist wrote:
snip

 Shouldn't the startxwin script check for running instances and delete all
 lock-files related to non-existent instances?  Why must this be a manual
 operation?

 I generally recommend against automagic cleanup of lock files from
 dead sessions being a general default because that also wipes out
 warning that something went wrong.  I do it in my situation because I
 have it on (essentially) dumb terminals where the session working is
 much more important than knowing something went wrong, and the dumb
 terminals are on flaky power, so most of the dead sessions are due to
 power failure anyway.

Apparently not.  If I start an X session (using the standard menu item
under the start menu) and manually shut it down, the lock file is not
deleted.

 The prior startxwin.exe just worked, and this new replacement script is
 clearly creating problems for previously happy CygwinX users, where no
 problems existed before (or, at least the problems weren't visible and
 didn't affect normal use).

Yes, startxwin.exe just worked, and the replacement doesn't.

 I actually have no experience with startxwin; I always called the X
 server directly with the options I wanted.

What do you mean directly?  From a mintty or such?

 However, I can say that
 freeing of lock files is the job of the process that created the lock
 files.  If you kill the process, stray lock files are a normal
 expectation.

No they're not, unless you restrict kill to mean kill -9 or
equivalent.  If you kill a process using just kill, or bu shutting
it down normally, it should clean up its lock file.

 I would have preferred to have seen startxwin.exe retained, and this new
 script phased in gradually, perhaps as startxwin_new in the first release.
 Then, when startxwin_new stabilizes, rename the executable to
 startxwin_old.exe and the script to startxwin. Several updates later,
 quietly remove startxwin_old.exe.

 It seems nonsensical to treat all CygwinX users as alpha testers. I'm more
 than willing to help test new features, but not in the dark: Make it very
 clear when significant subsystems are being evolved, and provide a way to
 try the new without losing the old.

 The changes were announced, and the announcement already sited in this
 thread.  Having read the announcement again, it looks like the
 replacement has as one of its goals bringing the X system more in line
 with general X and *nix standards, which, as far as I know, has always
 been a general goal of the entire Cygwin set of projects.

Then it's not succeeding.  Shutting down X normally under *nix does not
result in left-over lock files.

-- 
Will


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Re: startxwin.exe no longer exists?

2014-12-16 Thread Erik Soderquist
snip
 Apparently not.  If I start an X session (using the standard menu item
 under the start menu) and manually shut it down, the lock file is not
 deleted.

On a clean shutdown, the process should clean up its lock files; if it
isn't, that needs to looked at and/or reported.  The only caveat to
that I'm aware of is if a debug flag is set, files the process uses
may be intentionally left behind.  However, it doesn't sound like you
would be setting such flags.

snip
 I actually have no experience with startxwin; I always called the X
 server directly with the options I wanted.

 What do you mean directly?  From a mintty or such?

Windows .bat/.cmd files, custom crafted shortcut on the desktop,
windows registry changes... depends on the situation.  The one I
referenced with the dumb terminals and flaky power is a registry call
in autorun starting a .cmd file.

 However, I can say that freeing of lock files is the job
 of the process that created the lock files.  If you kill
 the process, stray lock files are a normal expectation.

 No they're not, unless you restrict kill to mean kill -9 or
 equivalent.  If you kill a process using just kill, or by shutting
 it down normally, it should clean up its lock file.

My apologies; I was only considering kill -9 as 'kill the process'.
You are correct, kill -15 is also a kill, but should allow the process
to exit cleanly.

snip
 ... bringing the X system more in line with general X and
  *nix standards, which, as far as I know, has always
 been a general goal of the entire Cygwin set of projects.

 Then it's not succeeding.  Shutting down X normally under *nix does not
 result in left-over lock files.

I will certainly agree that shutting down X cleanly should not leave
stray lock files behind.  I can also say that I'm not experiencing
that issue.  My best guess (and this is only a guess) is that
something is causing X to crash as it shuts down on your system,
causing the lock files to be left behind.

-- Erik

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Re: startxwin.exe no longer exists?

2014-12-15 Thread Will Parsons
Marco Atzeri wrote:

 On 12/12/2014 7:07 PM, Will Parsons wrote:
 For several years now I have been starting X windows by clicking on an
 icon on my desktop that is a link to C:\cygwin\bin\startxwin.exe.  It
 has recently ceased to work because apparently startxwin.exe no longer
 exists.  Somehow I missed where this was removed, so what is the
 recommended way of starting X from a desktop icon now?

 I seem to recall that startxwin.exe was introduced some time ago
 because using a script to start X was inadequate somehow, but I don't
 remember the details, so what changed?

 https://cygwin.com/ml/cygwin-xfree-announce/2014-11/msg4.html

OK - so what I get from that is that whatever problems were associated
with the original shell script have been solved and startxwin is now a
shell script again.  But, my basic question is unanswered - how do I
start an X session from an icon?  Obviously, simply replacing the link
to startxwin.exe to startxwin will not work, so I copied the shortcut
from the start menu to the desktop and tried it (after renaming my
.xinitrc and .startxwinrc files to avoid any problems with the change
of model).

If I click on the icon, I *do* get an X session (along with an xterm
that I don't need), but if try (e.g.) to start emacs under mintty, I
get a non-X emacs, with an error message:

  Display :0 unavailable, simulating -nw

Sure, display :0 is unavailable; checking DISPLAY in the (unwanted)
xterm shows DISPLAY is set to :5.  Why's that I wonder?

Further investigation shows ls -ltr /tmp:

-r--r--r--  1 william None 11 Nov 28 17:43 /tmp/.X0-lock
-r--r--r--  1 william None 11 Dec 13 17:43 /tmp/.X1-lock
-r--r--r--  1 william None 11 Dec 13 17:55 /tmp/.X2-lock
-r--r--r--  1 william None 11 Dec 13 19:22 /tmp/.X3-lock
-r--r--r--  1 william None 11 Dec 15 16:53 /tmp/.X4-lock
-r--r--r--  1 william None 11 Dec 15 17:00 /tmp/.X5-lock

Interesting.  It looks like every time I start an X session a lock
file is created and doesn't get deleted, so the display number keeps
changing.  This doesn't look right, so how do I avoid it?

-- 
Will


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Re: startxwin.exe no longer exists?

2014-12-15 Thread Larry Hall (Cygwin-X)

On 12/15/2014 09:49 PM, Will Parsons wrote:

Marco Atzeri wrote:


On 12/12/2014 7:07 PM, Will Parsons wrote:

For several years now I have been starting X windows by clicking on an
icon on my desktop that is a link to C:\cygwin\bin\startxwin.exe.  It
has recently ceased to work because apparently startxwin.exe no longer
exists.  Somehow I missed where this was removed, so what is the
recommended way of starting X from a desktop icon now?

I seem to recall that startxwin.exe was introduced some time ago
because using a script to start X was inadequate somehow, but I don't
remember the details, so what changed?


https://cygwin.com/ml/cygwin-xfree-announce/2014-11/msg4.html


OK - so what I get from that is that whatever problems were associated
with the original shell script have been solved and startxwin is now a
shell script again.  But, my basic question is unanswered - how do I
start an X session from an icon?  Obviously, simply replacing the link
to startxwin.exe to startxwin will not work, so I copied the shortcut
from the start menu to the desktop and tried it (after renaming my
.xinitrc and .startxwinrc files to avoid any problems with the change
of model).

If I click on the icon, I *do* get an X session (along with an xterm
that I don't need), but if try (e.g.) to start emacs under mintty, I
get a non-X emacs, with an error message:

   Display :0 unavailable, simulating -nw

Sure, display :0 is unavailable; checking DISPLAY in the (unwanted)
xterm shows DISPLAY is set to :5.  Why's that I wonder?

Further investigation shows ls -ltr /tmp:

-r--r--r--  1 william None 11 Nov 28 17:43 /tmp/.X0-lock
-r--r--r--  1 william None 11 Dec 13 17:43 /tmp/.X1-lock
-r--r--r--  1 william None 11 Dec 13 17:55 /tmp/.X2-lock
-r--r--r--  1 william None 11 Dec 13 19:22 /tmp/.X3-lock
-r--r--r--  1 william None 11 Dec 15 16:53 /tmp/.X4-lock
-r--r--r--  1 william None 11 Dec 15 17:00 /tmp/.X5-lock

Interesting.  It looks like every time I start an X session a lock
file is created and doesn't get deleted, so the display number keeps
changing.  This doesn't look right, so how do I avoid it?


You will get one lock file for every instance of the server you are running.
To remove the lock files, kill all instances of the server and remove any
remaining lock files.  Then you can start a single session.


--
Larry

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A: Yes.
 Q: Are you sure?
 A: Because it reverses the logical flow of conversation.
 Q: Why is top posting annoying in email?

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Re: startxwin.exe no longer exists?

2014-12-15 Thread Will Parsons
Larry Hall (Cygwin-X) wrote:
 On 12/15/2014 09:49 PM, Will Parsons wrote:
 Marco Atzeri wrote:

 On 12/12/2014 7:07 PM, Will Parsons wrote:
 For several years now I have been starting X windows by clicking on an
 icon on my desktop that is a link to C:\cygwin\bin\startxwin.exe.  It
 has recently ceased to work because apparently startxwin.exe no longer
 exists.  Somehow I missed where this was removed, so what is the
 recommended way of starting X from a desktop icon now?

 I seem to recall that startxwin.exe was introduced some time ago
 because using a script to start X was inadequate somehow, but I don't
 remember the details, so what changed?

 https://cygwin.com/ml/cygwin-xfree-announce/2014-11/msg4.html

 OK - so what I get from that is that whatever problems were associated
 with the original shell script have been solved and startxwin is now a
 shell script again.  But, my basic question is unanswered - how do I
 start an X session from an icon?  Obviously, simply replacing the link
 to startxwin.exe to startxwin will not work, so I copied the shortcut
 from the start menu to the desktop and tried it (after renaming my
 .xinitrc and .startxwinrc files to avoid any problems with the change
 of model).

 If I click on the icon, I *do* get an X session (along with an xterm
 that I don't need), but if try (e.g.) to start emacs under mintty, I
 get a non-X emacs, with an error message:

Display :0 unavailable, simulating -nw

 Sure, display :0 is unavailable; checking DISPLAY in the (unwanted)
 xterm shows DISPLAY is set to :5.  Why's that I wonder?

 Further investigation shows ls -ltr /tmp:

 -r--r--r--  1 william None 11 Nov 28 17:43 /tmp/.X0-lock
 -r--r--r--  1 william None 11 Dec 13 17:43 /tmp/.X1-lock
 -r--r--r--  1 william None 11 Dec 13 17:55 /tmp/.X2-lock
 -r--r--r--  1 william None 11 Dec 13 19:22 /tmp/.X3-lock
 -r--r--r--  1 william None 11 Dec 15 16:53 /tmp/.X4-lock
 -r--r--r--  1 william None 11 Dec 15 17:00 /tmp/.X5-lock

 Interesting.  It looks like every time I start an X session a lock
 file is created and doesn't get deleted, so the display number keeps
 changing.  This doesn't look right, so how do I avoid it?

 You will get one lock file for every instance of the server you are running.
 To remove the lock files, kill all instances of the server and remove any
 remaining lock files.  Then you can start a single session.

well, I *had* killed them.  Are you saying I need to manually remove
these old lock files?  I suppose I can come up with a way of
semi-automating this, but it doesn't seem like it should be necessary.
Is this a matter of X sessions not properly exiting?

-- 
Will


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Re: startxwin.exe no longer exists?

2014-12-15 Thread Larry Hall (Cygwin-X)

On 12/15/2014 10:30 PM, Will Parsons wrote:

Larry Hall (Cygwin-X) wrote:

On 12/15/2014 09:49 PM, Will Parsons wrote:

Marco Atzeri wrote:


On 12/12/2014 7:07 PM, Will Parsons wrote:

For several years now I have been starting X windows by clicking on an
icon on my desktop that is a link to C:\cygwin\bin\startxwin.exe.  It
has recently ceased to work because apparently startxwin.exe no longer
exists.  Somehow I missed where this was removed, so what is the
recommended way of starting X from a desktop icon now?

I seem to recall that startxwin.exe was introduced some time ago
because using a script to start X was inadequate somehow, but I don't
remember the details, so what changed?


https://cygwin.com/ml/cygwin-xfree-announce/2014-11/msg4.html


OK - so what I get from that is that whatever problems were associated
with the original shell script have been solved and startxwin is now a
shell script again.  But, my basic question is unanswered - how do I
start an X session from an icon?  Obviously, simply replacing the link
to startxwin.exe to startxwin will not work, so I copied the shortcut
from the start menu to the desktop and tried it (after renaming my
.xinitrc and .startxwinrc files to avoid any problems with the change
of model).

If I click on the icon, I *do* get an X session (along with an xterm
that I don't need), but if try (e.g.) to start emacs under mintty, I
get a non-X emacs, with an error message:

Display :0 unavailable, simulating -nw

Sure, display :0 is unavailable; checking DISPLAY in the (unwanted)
xterm shows DISPLAY is set to :5.  Why's that I wonder?

Further investigation shows ls -ltr /tmp:

-r--r--r--  1 william None 11 Nov 28 17:43 /tmp/.X0-lock
-r--r--r--  1 william None 11 Dec 13 17:43 /tmp/.X1-lock
-r--r--r--  1 william None 11 Dec 13 17:55 /tmp/.X2-lock
-r--r--r--  1 william None 11 Dec 13 19:22 /tmp/.X3-lock
-r--r--r--  1 william None 11 Dec 15 16:53 /tmp/.X4-lock
-r--r--r--  1 william None 11 Dec 15 17:00 /tmp/.X5-lock

Interesting.  It looks like every time I start an X session a lock
file is created and doesn't get deleted, so the display number keeps
changing.  This doesn't look right, so how do I avoid it?


You will get one lock file for every instance of the server you are running.
To remove the lock files, kill all instances of the server and remove any
remaining lock files.  Then you can start a single session.


well, I *had* killed them.  Are you saying I need to manually remove
these old lock files?  I suppose I can come up with a way of
semi-automating this, but it doesn't seem like it should be necessary.
Is this a matter of X sessions not properly exiting?


Yes, that is correct.  In general, you shouldn't see this.

--
Larry

_

A: Yes.
 Q: Are you sure?
 A: Because it reverses the logical flow of conversation.
 Q: Why is top posting annoying in email?

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startxwin.exe no longer exists?

2014-12-13 Thread Will Parsons
For several years now I have been starting X windows by clicking on an
icon on my desktop that is a link to C:\cygwin\bin\startxwin.exe.  It
has recently ceased to work because apparently startxwin.exe no longer
exists.  Somehow I missed where this was removed, so what is the
recommended way of starting X from a desktop icon now?

I seem to recall that startxwin.exe was introduced some time ago
because using a script to start X was inadequate somehow, but I don't
remember the details, so what changed?

-- 
Will


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