I have developed an algorithm for android device and want to release the .SO file of my algorithm to other develop company.
How can I protect the .SO file from being copied/pirating? For example, add use time limitation on it. Is there some software can do it?
why don't you use static library instead? it will be linked into end-binary without separate file
Related
I have an Mobie/Android Wear project which share a library for resources.
How can I exclude some big bitmaps from being shared in Wear apk?
You should have 2 libraries:
one common for Mobie/Wear, the other only for Mobile.
Then move big files into Mobile lib
If you don't select particular file from drawables (or any other) and send it using DataItem API they won't be synchronized, so there is nothing to worry about. Second option is to include them before compiling to 'wear' module in 'res/drawable' but if you don't do it, it won't happen automatically.
I have a go app which relies heavily on static resources like images and jars. I want to install that go executable in different platforms like linux, mac and windows.
I first thought of bundling the resources using https://github.com/jteeuwen/go-bindata, but since the files(~100) have size ~ 20MB or so, it takes a really long time to build the executable. I thought having a single executable is an easy way for people to download the executable and run it. But seems like that is not an effective way.
I then thought of writing a installation package for each of the platform like creating a .rpm or .deb packages? So these packages contain all the resources and puts it into some platform specific pre defined locations and the go executable can reference them. But the only thing is that I have to handle that in the go code. I have to see if it is windows then load the files from say c:\go-installs or if it is linux then load the files from say /usr/local/share/go-installs. I want the go code to be as platform agnostic as it can be.
Or is there some other strategy for this?
Thanks
Possibly does not qualify as real answer but still…
As to your point №2, one way to handle this is to exploit Go's way to do conditional compilation: you might create a set of files like res_linux.go, res_windows.go etc and put a set of the same variables in each, pointing to different locations, like
var InstallsPath = `C:\go-installs`
in res_windows.go and
var InstallsPath = `/usr/share/myapp`
in res_linux.go and so on. Then in the rest of the program just reference the res.InstallsPath variable and use the path/filepath package to construct full pathnames of actual resources.
Of course, another way to go is to do a runtime switch on runtime.GOOS variable—possibly in an init() function in one of the source files.
Pack everything in a zip archive and read your resource files from it using archive/zip. This way you'll have to distribute just two files—almost "xcopy deployment".
Note that while on Windows you could just have your executable extract the directory from the pathname of itself (os.Args[0]) and assume the resource file is located in the same directory, on POSIX platforms (GNU/Linux and *BSD etc) the resource file should still be located under /usr/share/myapp or a similar place dictated by FHS (or particular distro's rules), so some logic to locate that file will still be required.
All in all, if this is supposed to be a piece of FOSS, I'd go with the first variant to let the downstream packagers tweak the pathnames. If this is a proprietary (or just niche) software the second idea appears to be rather OK as you'll play the role of downstream packagers yourself.
I have a folder which contains an executable file (Exec.exe) and a lot of files that Exec.exe needs to run. Currently, it's pretty ugly having all of those files there when I only need to run the one executable. Is there any way to bundle them all into another executable that runs Exec.exe and also contains all of the files Exec.exe needs to run? Thanks for any help!
Yes, but I would recommend you only do it if you need to.
You can achieve this by adding your files as resources in your exe project, so they are added into the exe's binary at compile time. You can then access the files directly from your exe at runtime by using LoadResource and related functions. I'd recommend reading up on the Portable Executable (PE) file format if you're considering this route.
This is the way to do it if you, and again I stress, need to have only a single binary where you can still access your files. There are obvious downsides to doing this, such as it's much more coding to access the data as it's embedded in your application binary, and you can't easily update the files (check out resource hacker tool) without re-compiling your binary to include the new data.
If the only reason you want to do this is because it's "pretty ugly" seeing the additional files in the same directory as your exe, consider moving them into another directory, for example,
from:
MyExeDir
--myExe.exe
--myFile1.txt
--myFile2.dll
--myFile3.dat
to:
MyExeDir
--myExe.exe
--dat
----myFile1.txt
----myFile2.png
----myFile3.dat
or:
MyExeDir
--bin
----myExe.exe
--dat
----myFile1.txt
----myFile2.png
----myFile3.dat
So all the "ugly" looking files are out of the way.
Why don't you create a shortcut of "Exec.exe" and keep it somewhere handy ? If whats that you want ?
Or if you want to distribute your app, you can use Winrar/Winzip (winrar is the best) to create a compressed .exe of your entire folder, making "Exec.exe" as your startup app. Use the SFX option in winrar.
Can one get access to the application source files on mac? In Applications folder any .app file can be explored and there get access to the header files, is it all or can the class files be accessed too?
Unless a Mac application includes private frameworks (in the application bundle), which includes their headers (rare), no.
Most of the time, a Mac application will just contain the application's binary, as well as resources (icons, images, L10N, etc.).
You may disassemble the binary, if you know how to deal with assembly language.
If the application was built with Objective-C, you can use specific tools to produce a header file from the binary, with all the Objective-C interfaces.
Take a look at ClassDump, for instance.
You may also use the nm command, on the application's binary, to get a list of the symbols it contains.
I'm trying to make a distribution directory with my application. I've copied several Qt DLLs to that directory, and the program seems to be working, with one exception: it doesn't seem to find SQL plugin for SQLite. Copying qtsqlite.dll to the directory, doesn't allow my application to open or create SQLite files. What must be the direcotry structure or which additional files need to be copied so that the program can read the database?
you can use depends.exe to see exactly what the dependencies of your exe are and make sure they're all included.
Also, read this page about qt plugins. they are supposed to be in a specific directory called "plugins" and not in the main directory with all the other dlls.
Most probably, the qtsqlite.dll itself depends on original SQLite DLL's which you probably need to copy as well.
Don't forget to include an LGP license copy in your distribution as well as pointers to the original download ressources of the libs you include and their sources. To stay with the law :-)
Thanks to the link #shoosh provided, I was able to fix the problem. I needed to create sqldrivers subdirectory in the distribution dir with qsqlite.dll library inside. But that was just step one. Do you have any tips and resources on creating a full-blown Windows installer? I'm mainly a Linux programmer so this area is unknown to me.