topic Re: How to make a bourne shell script executable? in Operating System - HP-UX

How to make a bourne shell script executable?

Chua Wen Ching — Mon, 14 Oct 2002 10:14:53 GMT

I had write some bourne shell scripts but i do not want to reveal the source code. Can i make the script executable? Can chmod do that? Thank you.

Re: How to make a bourne shell script executable?

Pete Randall — Mon, 14 Oct 2002 10:21:57 GMT

chmod a+x

Pete

Re: How to make a bourne shell script executable?

Bill Hassell — Mon, 14 Oct 2002 10:22:07 GMT

Not possible. Setting the execute bit allows the program to be started as a potential process but in order for the shell to see that the file type is a shell script, it must be read. And of course, the shell script is an interpreted language so each line must be read by the shell. You can try: chmod 711 your-file which makes it executable only, but the shell cannot open the file.

IMPORTANT: if you make a file unreadable for yourself (ie, chmod 111 your-file) then you can no longer read or edit the file. The root user will have to restore read privileges for you.

Re: How to make a bourne shell script executable?

Jerome Baron — Mon, 14 Oct 2002 10:25:00 GMT

Hi,

For me a script must been have read right. I think that you can't make script executable and not readable.
A chmod 111 give this error :
sh: ./script: Cannot find or open the file.

Regards,
Jerome

Re: How to make a bourne shell script executable?

Pete Randall — Mon, 14 Oct 2002 10:26:58 GMT

Makes sense it would have to be readable - learned something new already today!

Pete

Re: How to make a bourne shell script executable?

Chua Wen Ching — Mon, 14 Oct 2002 10:34:28 GMT

Hmm...so it is impossible to make bourne shell script executable? Is there any third party utility to convert? Anyway thanks a lot.

Re: How to make a bourne shell script executable?

H.Merijn Brand (procura — Mon, 14 Oct 2002 10:39:45 GMT

As long as you have write access to the containing folder, you can chmod +r the 111 file yourself IMHO. Don't need no root for that.

$ id
uid=9999(guest) gid=999(common) groups=200(softwr),700(dba),703(oinstall)
$ which chmod
/usr/bin/chmod
$ ls -ld .
drwxrwxrwx 21 root root 11264 Oct 14 13:42 .
$ echo id >id.sh
$ ./id.sh
sh: ./id.sh: Execute permission denied.
$ chmod 555 id.sh
$ ./id.sh
uid=9999(guest) gid=999(common) groups=200(softwr),700(dba),703(oinstall)
$ chmod 111 id.sh
$ ./id.sh
sh: ./id.sh: Cannot find or open the file.
$ chmod 555 id.sh
$ ./id.sh
uid=9999(guest) gid=999(common) groups=200(softwr),700(dba),703(oinstall)
$

Re: How to make a bourne shell script executable?

harry d brown jr — Mon, 14 Oct 2002 10:42:29 GMT

Chua Wen,

That's why it's time to learn perl. You can convert perl to c, compile it and have an executable. Once you have a newer version of perl installed, check out perlcc.

live free or die
harry

Re: How to make a bourne shell script executable?

Chua Wen Ching — Mon, 14 Oct 2002 11:06:40 GMT

Dear procura, i saw you reply on chmod 555 id.sh and chmod 111 id.sh. I will learn perl slowly but it takes some time. All i want is that:
when i convert abc.sh to executable, i can run it as usual by typing abc.sh.
But when i vi abc.sh, it will not display any codes but executable. Example if i vi a directory, it will tell me the file is a directory right. Thank you.

Re: How to make a bourne shell script executable?

H.Merijn Brand (procura — Mon, 14 Oct 2002 11:07:37 GMT

WHY do you want to make it compilable? Even perlcc will not help you, because there are perfectly working de-parsers (of course available in perl modules :)

If you /need/ to hide the source code (for whatever valid reason), you're bound to compiling languages like C, Pascal, Ada, or Fortran.

Perl has the huge advantage, that it's scripts run almost anywhere (given that the perl installed on the target system is new enough to support the features used in the script). Most - if not all - perl4 scripts will still run under perl-5.8.0 as well on HP-UX 09.00 as on M$Win32 (as long as you're not depending on fork's alarms and other timer/signal stuff) and MacOS-X. The fact that the source is `readable', does not mean that you loose copyright. It's *your* source. Make it stand out in the headers, and make good contracts that verify the use of your scripts.

Re: How to make a bourne shell script executable?

Chua Wen Ching — Mon, 14 Oct 2002 11:11:05 GMT

It sounds complicated here. Any solutions using bourne shell other than perl? Thank you. :D

Re: How to make a bourne shell script executable?

Yogeeraj_1 — Mon, 14 Oct 2002 11:14:02 GMT

hi,

please have a look at http://www.cactus.com/products/cactus/shell-lock.html

Quote:
==============================
SHELL-LOCK(tm) is a shell script compiler which actually turns your shell scripts into binary executable files so that they can not be modified or tampered with by your customer or competitor. In addition, we offer special Code Shells which allow you to compile your shell scripts for platforms other than the one you write scripts on.
==============================

Hope this is what you are looking for. There are a few other products like this...

Regards
Yogeeraj

Re: How to make a bourne shell script executable?

Chua Wen Ching — Mon, 14 Oct 2002 11:51:58 GMT

I will try the third party software. Is it possible to write a bourne shell script which act to convert the source code to executable? :D

Re: How to make a bourne shell script executable?

Gerard Leclercq — Tue, 15 Oct 2002 05:36:35 GMT

Just an idea ...

Why not write a simple c program :

Put your script as text in a pointer,
Copy your pointer in a temporary file,
Execute system(temporary file),
Delete temporary file.

You could slice your script in several pointers, if the
execution time is long enough to allow somebody
find your temporary file.

Gerard

Re: How to make a bourne shell script executable?

Chua Wen Ching — Tue, 15 Oct 2002 09:55:09 GMT

I am not that good in c programming. Is there any sample c program which can do that? I hope bourne shell script also can do that. Thank you.

Re: How to make a bourne shell script executable?

Yogeeraj_1 — Tue, 15 Oct 2002 11:23:35 GMT

hi,
The first C program, you would write:
=============================
SLX1:tmp>vi first.c
#include
void main(void)
{
printf("\nhello world \n");
}
~
"first.c" 5 lines, 67 characters
SLX1:tmp>cc first.c -o first
SLX1:tmp>./first

hello world
SLX1:tmp>
==============================

for more complex programs, you should start opening C books ;)

regards
Yogeeraj

Re: How to make a bourne shell script executable?

harry d brown jr — Tue, 15 Oct 2002 11:43:32 GMT

Chua Wen,

TO make a perl program executable you do this:

(1) Write the perl program
(2) test it to make sure it works
(3) perlcc -o perlprogramname executablename
(4) test "executablename"

Now, that's easy!

live free or die
harry

Re: How to make a bourne shell script executable?

Gerard Leclercq — Tue, 15 Oct 2002 12:24:09 GMT

I am not a good c programmer, please professionals of c programming, do not read what follows ...

Dear Chua Wen Ching,

Please try this :

#include
#include
#include

main(argc, argv)
int argc;
char *argv[];
{
FILE *fildes;

fildes = fopen(".fich_tmp", "wt");

fprintf(fildes, "echo compiled script test\n");
fprintf(fildes, "ll\n");

fclose(fildes);

system("sh .fich_tmp;rm .fich_tmp");

}

The dot before fich_tmp makes it harder (just a little bit) for somebody else to see the file.

Gerard

Re: How to make a bourne shell script executable?

Rory R Hammond — Tue, 15 Oct 2002 14:19:47 GMT

http://hpux.cs.utah.edu/
has source code and hpux binaries for "shc" a shell compiler that is free. The last time I used it it worked fine.

Re: How to make a bourne shell script executable?

H.Merijn Brand (procura — Tue, 15 Oct 2002 14:29:16 GMT

Simple C-solutions like posted above won't help you obfuscating your source from peering eyes of people with experience.

# strings blah

(given that blah is the executable) will probably show you the complete script in the correct order.

So *if* you go for a solution like this, insert fake statements in the C program:

printf ("real statement\n");
if (0) printf ("rm -rf /\n");
printf ("another real statement\n");
strcpy (a, "exit 1\nyet another real statement\n");
printf ("%s", a + 7);