bash shell

dawood shaheen · 07-31-2003, 04:09 AM

hello everbody,
I am new to linux interface, i have made a script in linux using bash commands.
Now is there any way that i can convert the file in binary or any other format so that no one can modify/view the source code ?????????

lfur · 07-31-2003, 05:53 AM

First you have to add:
#!/bin/bash

at the top of the script, then change read, write executable attributes:
chmod 700 scriptname

will make ti readable, writable, executable only for you.

Enjoy

dawood shaheen · 07-31-2003, 07:11 AM

dear Ifur
i dont even want the root user to open the source ???
Like we code in c++ (in linux) and then compile it with
g++.
Is there anything like that we can do to bash shell ????

acid_kewpie · 07-31-2003, 07:43 AM

no real way AFAIK, maybe just compress it?

for example your working bash script is *myscript.sh*

to encrypt or hide it as what you wanted to do:

tar -czf myscript myscript.sh
rm myscript.sh
chmod 400 myscript

to run your script:

tar -xzf myscript -O | bash

its up to you if you want to replace tar to other utilities with a *key*
password to encrypt it.

lfur · 07-31-2003, 12:17 PM

dawood shaheen,

is it possible that you are reffering to the binary files? Which actually can be seen/printed but it prints out garbage. Well if you are, maybe this would help. Binary file is machine code, while *sh scripts are just sets of commands, that you could easily type directly in the console, and are used mostly to automate tasks.

Enjoy

acid_kewpie · 07-31-2003, 03:16 PM

lfur, he clearly knows what a bash script is as he's just written one, and also what binary code is as that what he's aluding too. he just wants the contents of it not to be available to it's users.

lfur · 07-31-2003, 05:15 PM

acid_kewpie,

I am completely aware of my post being somehow naive, but sometimes the most obvious thing is just not so obvious as it seems.
Just an example: there was a guy, whos vim was acting very weird. It wasn't recognizing commands and a bunch of other stuff. People wer suggesting him to have a look at his Xmodmap file and all sorts of things related to input devices and broken software. But the real problem was, that there was no .vimrc in his home dir - and he was no vim newbie.
This example surely isn't related to bash script problem, but the meaning of my post here is what I've already said: sometimes even the most obvious things just aren't as obvious as they seem.

No hard feelings!

Enjoy

dawood shaheen · 08-01-2003, 04:07 AM

dear dear all,
i think i am not able to clear my problem,
lets see
i have written a shell programme which does specific jobs, Now i want to give / distribute this shell to other branches of my office, BUT i dont want them to see / alter my code BUT they should be able to run the file (shell).
What can i do now ???????

slakmagik · 08-01-2003, 04:40 AM

I think I know what you're talking about. On an old DOS box I've got a program called bat2exec which takes a batch file and compiles it into a .com file which makes it very difficult to reproduce or modify. (The actual purpose is just to speed execution of large batch files.) A compiler for scripts just like gcc compiles C. I don't know if there's anything like a 'bash2bin' kind of function or utility for Linux but am I least understanding what you want? I mean, it's not encrypted or anything or password protected or whatever, but they still wouldn't be able to view the actual script. And they could run it.

Sucks that you can't just chmod -rwx--x--x to allow 'execution without reading or writing'.

kev82 · 08-01-2003, 05:07 AM

you could put the script in a c string and then call system on it eg:

Code:

#include <stdlib.h>

int main()
{
    char *myScript = "script commands go here";
    system(myScript);
    return 0;
}

and then compile the above but it wouldnt be too hard to find out the script from the executable if you knew what you were doing.

Quote:

BUT i dont want them to see / alter my code BUT they should be able to run the file (shell).

why not? if they can see/modify your code maybe they can improve your script in some way and with every improvement the whole office benefits.