Sometimes a process hangs in a shell window...How do you stop it and close the window? The DOS command "BREAK" needs a cursor? What if there isn't one in the window?


Ctrl+C is the default for sending a Break signal to halt a process.
A process that has been aborted this way displays ***Break
in the Shell window. Ctrl+D halts execution of a script file.

Just found it in the manual

[ Edited by osco on 2010/1/20 11:11 ]

Press ctrl-c, next time maybe you could check the manual before starting another thread? Maybe post your findings to your blog?

@Golem

Didn't you know?
MorphZone IS osco's blog

[ Edited by Ruud on 2010/1/20 16:25 ]

Wait, I thought it was my blog!?!?

Seriously, I don't think there is harm in having simple questions and answers here. People Google their problems more often than looking into manual and stuff on this forum will be shown in the Google results.

Is the MorphOS manual visible to Google? If not it should be so it can be indexed.

This gives a mixed results at best:
http://www.google.com/search?q=morphos+break+shell+process

This is much better but you have to know to about Amiga:
http://www.google.com/search?q=amiga+break+shell+process

What's a blog? Ok Golem googling "blog" hmmmm SAID well! @Ruud and Golem. In a way MorphZONe is my Blog..
It is interesting to me my progress or lack of it with MorphOS.. I can't tell you how happy I am with Morph. My Home Page is MorphZone. My posts (blog) show some sucsess :) I read most of the posts.
Thank-you again

Quote:
There's a manual?

I think he was referring to the Amiga DOS manual.

by Beamish2040 on 2010/1/20 17:59:59
There's a manual?

Help.lha
Inline manual for MorphOS Shell Commands

Yes, Control-C sends a break signal to the process. Also, Control-D sends another different break signal, and you can send those signals from another console (knowing its process number) with the "break" command.
But it's all a matter if the process actually LISTENS to those signals. One can write a program that locks itself deaf while doing something, not listening to anyone. Precisely, not listening to anyone is typical of crashed programs. Then, you should use a task manager to, hopefully, terminate the process (ugh!) and, more hopfully, attempt to recover the resources it was using.

"actually LISTENS to those signals. One can write a program that locks itself deaf while doing something, not listening to anyone. Precisely, not listening to anyone is typical of crashed programs."

sounds like my wife

OWB cut this post, and pushing back was a bad idea :)


[ Edited by geit on 2010/1/21 11:30 ]

Open a new shell:

Type "status"

result is something like this:

Process 1: Loaded as command: sushi
Process 3: Loaded as command: status
Process 4: Loaded as command: SuperApp

SuperApp is the program we want to kill. Process number is 4 so type:

Break 4

Another status call will show you if the command reacted.

Geit



[ Edited by geit on 2010/1/21 11:30 ]

I encountered sometimes with programs that keep the shell window open. Pressing ctrl+c shows break, but i can't close the window, it keeps iconified.
Tried with the task manager, but no luck. Are these processes un-exitable until you reboot?.
Also another question a bit off topic: When a program crash(under os4emu), what's the way to get again into morphos workbench instead or rebooting?.

Quote:
You need to make sure parent task has quit, then it should be possible to close the shell window. To avoid having an iconified shell window on your ambient desktop you can just hide the window with ctrl-lalt-i (see icontrol prefs).

You can also use TaskManager or scout to break a task/process, they are more comfortable, since they have a gui!

...and if we want to play around with status and break bit more :)

If you want to break certain named process automatically from a script, you could do for example this:

Status COM SuperApp > T:SuperApp.pid
Break ? < T:SuperApp.pid >NIL:

I use it to unmount smbfs shares from dopus menus/hotkeys :)

And if you want to get more complete list of tasks in shell, you can use TaskList command. And make more brutal kills with iKill command.

Got this via emai from C.S.:

"If you wish to "kill" a shell, use the command "mossys:c/iKill".
Simple double click this program. After that the cursor was changed to a
cross.
If you now klick with this "cross" a shell - window, the Thread was
finished."

> When a program crash(under os4emu), what's the way to get again into
> morphos workbench instead or rebooting?.

I guess it's the same as with any program: Just switch screen.

Code:

You could also write it that way:

Quote:

Note the Backticks ! ` `

The output of the command between is used as input for the break command. Kind of simple PIPE functionallity, introduced with AmigaOS 2.0.

IIRC, there is the freeze command. Open taskmanager, get the process ID and type

freeze processidnumber

in a shell. It will freeze the task/process. It doesn't remove intuition stuff like iKill nor free any ressources afaik.

MorphOS should let me change screen?. I mean when a os4 program crashes and all is showed is a black screen.

P.D: What are the keyboard shortcuts for window switching?

[ Edited by _ThEcRoW on 2010/1/22 14:20 ]

Quote:
Depending on the state of the system lcommand-m/n should work for that.
Quote:
None are defined by default, but have a look in Prefs -> IControl.