From: nobu.nokada@...
Date: 2004-03-05T01:35:44+09:00
Subject: Re: non-root binary distribution

Hi,

At Fri, 5 Mar 2004 00:51:39 +0900,
David Garamond wrote in [ruby-talk:94230]:
> Based on your suggestion, I've created a C wrapper like below. The real 
> ruby is renamed to "ruby.real". Advice welcome, since this is probably 
> only the 7th or 8th C program I've written, ever. :-)

I recommend static-linked binary after all. You'd have no merit
of shared library at all if you put the copy in each users'
space.

> #include <stdio.h>
> #include <errno.h>
> 
> int main(int argc, char *argv[]) {
>    static char binpath[512+5], libpath[512+6];

You'd better to get rid of magic numbers.

>    p = (char *)getenv("LD_LIBRARY_PATH");
>    if ((env = (char *)malloc(512+1+(p==NULL ? 0:strlen(p)))) == NULL) {
>      fprintf(stderr, "malloc() failed: %s\n", strerror(errno));
>      exit(1);
>    }
>    strcat(env, "LD_LIBRARY_PATH=");

Use strcpy instead of strcat here, content of malloc'ed area is
not guaranteed.

-- 
Nobu Nakada