env

[Harvey Eneman]

I've experienced an issue with the env implementation due to its 
modification of the environ external variable:

 /* If no program is specified, print the environment and exit. */
 if (argc <= optind)
   {
     while (*environ)
        puts (*environ++);
     exit (EXIT_SUCCESS);
   }

The difficulty occurs when a LD_PRELOAD shared object uses glib 
functions that rely in the stability of environ.

Is there a rational reason why a local variable is not being used?  For 
example:

 /* If no program is specified, print the environment and exit. */
 if (argc <= optind)
   {
     char **e = environ;
     while (*e)
        puts (*e++);
     exit (EXIT_SUCCESS);
   }

Thanks,

Harv