Convert shell scripts to other language

vladmihaisima · 07-27-2005, 03:19 AM

Hello,

Does anybody knows a tool to convert a bash shell script to other languages. My problem is that a small script grew and now must generate a lot of ouput in many files, and bash is to slow for that.

(I could rewrite it but thought it was woth asking)

Thanks,

keefaz · 07-27-2005, 04:53 AM

Even if such a tool exits, the resulting code wouldn't be optimized...
Also you may find that rewrite your code is faster than searching
the code converter tool

enemorales · 07-27-2005, 04:56 AM

Something like this http://www.datsi.fi.upm.es/~frosal/sources/shc.html ?

EDIT: keefaz is right in the optimization observation, I think.

vladmihaisima · 07-27-2005, 05:13 AM

enemorales:
Thanks, I will give it a try
Edit: from the man page: shc's main purpose is to protect your shell scripts from modification or inspection.

keefaz:
Only the first time will take longer.

And even if it will not be optimised I think it will run much faster in C or perl. One benchmark I found (not that relevant but still there is a huge difference shown) http://www1.physik.tu-muenchen.de/~j...uagebench.html - bash/perl performance is 600x so I think even 'unoptimized' code will run fast.

enemorales · 07-27-2005, 06:15 AM

Quote:

enemorales:
Thanks, I will give it a try
Edit: from the man page: shc's main purpose is to protect your shell scripts from modification or inspection.

Well, tha's what I meant. I think that the program just does

Code:

main() {
  system("....") /* your first shell statement */
  system("...")  /* second shell statement */
  ...
}

in a kind of "encrypted" way, but as it is using the shell, it cannot be faster than the script.

As keefaz said, I think that the better you can do is to rewrite your script(s) in perl or python.

Regards

keefaz · 07-27-2005, 08:52 AM

[edit]
just tested shc, indeed the script shell is encrypted in the binary

chrism01 · 07-28-2005, 02:25 AM

Generally I'd have to agree a re-write is prob best.
For one thing, if the script 'just grew' then it will prob benefit from a re-design anyway.
Also, as an aside, Perl comes with these 2 tools: awk2perl, sed2perl. Maybe useful (or not).