im coding a program that starts an command prompt boot application ,at run time of the boot application,the boot application asks many questions like for eg.press 1 to read or 2 to write.but always i'll be reading from the app.i always want to pass 2 to it.but the issue is how should i know that the back ground boot application has asked me a question and that i should reply with appropriate answer dynamically?
If the program reads the input from the standard input then you can create a text file containing your input:
2
Then redirect the standard input to that file:
myapp.exe < inputfile.txt
Perhaps the program has command line options that would also allow you to avoid being prompted.
Note that your question is ambigous. If you are choosing the option to read, shouldn't you input 1?
Related
I'm using the latest DWScript which has a TdwsDebugger component with it. However I'm not necessarily looking to provide debugging tools to the user - just visually show the current line number.
In the TdwsDebugger component, in its OnDebug event, expr.ScriptPos seems to provide me with this information. But I'm trying to figure out how to make use of this without actually "debugging".
How can I show current DWScript line number without implementing debugging?
When no debugger is active, there is no code actively maintaining any current "line" or other particular execution information, so that information is not available.
Basically, when not debugging, the script execution engine tries to avoid any debugging-related overhead, which includes maintaining current line number or sending debug events notifications.
I want to make an app which compiles Swift code, so how can I use a website named www.swiftstub.com or any similar website to retrieve the output of the code? I want my app to have a simple UITextView in which the user can type the code. If a UITextView cannot be used, what can be used?
I want my app to send the code typed to this website, and then retrieve the output back and display it. How can this be done? Thanks!
Make an app that sends text to a server.
Have the server compile this code, run it, and capture the output.
Send this output back to the app.
Have the app display the output.
This is an extreme oversimplification, there are lots of things to consider, but these are kind of the big sections of whats there to to. You need to understand very well on the app side: UI and networking, and on the server side: triggering a compilation of text, capturing that output (command line, maybe Swift or Python can help you here) and HTTP(S) responses and requests (or sockets, even harder).
This does not sound like an easy task, so you are very courageous.
Build all components locally:
App:
- write an app with a textView and a button, and on the tap of that button, save the output to a textile. This is to avoid any networking complications at this point, later, instead of saving, you would send this to a server.
Server: (just build the things on your computer)
- write some script/program that can read in that textfile that was saved.
- Then you need to compile this code (lookup 'xcrun' on google) and capture the output. Save this output to a textile. Have your app load this file and display it.
The important thing to consider is the real server machine you will run this code on later: it has to be a machine that can compile, and execute Swift code. Currently, this means it has to be an OS X machine. This is hard to find, as most servers run linux, and there is no Linux Swift compiler yet.
Getting this to work would be a proof of concept: you can capture text from the app, you can grab this text and compile it, you can capture the output of the compilation, and you can have the app read that output and display it.
Once you've got this working, you would need to find a server that can do the compilation part, and run what you build to do that. Then you would need to write some code in your app that sends an HTTP request to your server containing this text, to which your server would respond with the output of that compilation.
As I said, this is a big undertaking, with lots of difficult parts and unexpected surprises, so don't expect this to be done in a couple of weeks, it will most likely be more like over six months.
Try to find someone who has experience on programming and setting up a server, that will really help you a lot.
I have been searching all day to find a solution to this problem.
I have 2 Excel instances (2 times launched) and in one a batch process is running to create a pdf file. If I use ShellExecute to start the conversion then the focus is not switched to the called application and the user can continue in the other excel application without interuptions.
There is altough a problem, the ShellExecute does not wait and so this is runing square. I tryed with ShellExecuteEx with the nescessary options set but this steals the focus anyhow. So my only chance is ShellExecute but I should be able to get the id of the process created so I can wait until ended. A long explaination but I found it nescessary. Who can help me here ?
I'm trying to write a program to ask me to input some information periodically, so I've written a service in C to run in the background, I can watch it reporting its okay by refreshing its log file. Now I'm stuck on how to get it to open up cmd and ask for the information.
I'd like to save this information to a log file. (I'm planning on monitoring my sleeping habits)
I tried using system("getinput.exe") and that seems to do nothing, I know using system() is bad but it was a first step.
CreateProcess() I simply cannot get to work, the example on MSDN http://msdn.microsoft.com/en-us/library/ms682512.aspx doesn't work for me, i just get CreateProcess failed (2) whenever i try createprocess.exe dir for example.
Surely there must be a way?
EDIT: Thanks for the replies I will try to take a different approach then. Where would I start with writing a background application that can occasionally ask for user input in C?
Looking for a little help getting started on a little project i've had in the back of my mind for a while.
I have log file(s) varying in size depending on how often they are cleaned from 50-500MB. I'd like to write a program that will monitor the log file while its actively being written to. when in use it's being changed pretty quickly easily several hundred lines a second or so. Most if not all of the examples i've seen for reading log/text files are simply open and read file contents into a variable which isn't really feasible to do every time the file changes in this situation. I've not settled on a language to write this in but its on a windows box and I can work in .net flavors / java / or php ( heh dont think php will fly to well for this), and can likely muddle through another language if someone has a suggestion for something well built for handling this.
Essentially I believe what I'm looking for would probably be better described to as a high speed way of monitoring a text file for changes and seeing what those changes are. Each line written is relatively small. (less than 300 characters, so its not big data on each line).
EDIT: to change the wording to hopefully better describe what i'm trying to do. Which is write a program to keep an eye on a log file for a trigger then match a following action to that trigger. So my question here is pertaining to file handling inside a programming language.
I greatly appreciate any thoughts/comments.
If it's incremental then you can just read the whole file the first time you start analyzing logs, then you keep the current size as n. Next time you check (maybe a timed action to check last modified date) just skip first n bytes, read all new bytes and update size.
Otherwise you could use tail -f by getting its stdout and using it for your purposes..
The 'keep an eye on a log file' part of what you are describing is what tail does.
If you plan to implement it in Java, you can check this question: Java IO implementation of unix/linux "tail -f" and add your trigger logic to lines read.
I suggest not reinventing the wheel.
Try using the elastic.co
All of these applications are open source and free and are capable of monitoring (together) and trigger actions based on input.
filebeats - will read the log file line by line (supports multiline log messages as well) and will send it across to logstash. There are loads of other shippers you can use.
logstash - will take the log messages, filter them, add tags and send the messages to elasticsearch
elasticsearch - will take the log messages and index them, the store them. It is also capable of running actions based on input
kibana - is a user friendly web interface to query and analyze the data. Or just simply put it up on a dashboard.
Hope this helps.