<p>In  the unix variant (& hence the Mac variant), there are many environment variables that can specify such things as<br>
SQUEAK_PLUGINS<br>
SQUEAK_ENCODING<br>
SQUEAK_PATHENC<br>
SQUEAK_TEXTENC<br>
SQUEAK_VM<br>
First these should be dialect-specific (PHARO_PLUGINS CUIS_PLUGINS NEWSPEAK_PLUGINS etc), and for backward-compatibility the Squeak specific names should remain functional.  So all VM environment variable access should be though a routine, somewhat like</p>
<p>if ((ev = getvmenvvar("PLUGINS")))   squeakPlugins = strdup(ev);</p>
<p>where getvmenvvar is something like</p>
<p>char *<br>
getvmenvvar(const char *var)<br>
{<br>
char varname[64];<br>
char *value;<br>
#if PHARO_VM</p>
<h1>define VM_VAR_PREFIX "PHARO_"</h1>
<p>#elif CUIS_VM</p>
<h1>define VM_VAR_PREFIX "CUIS_"</h1>
<p>#elif NEWSPEAK_VM</p>
<h1>define VM_VAR_PREFIX "NEWSPEAK_"</h1>
<p>#endif<br>
#if defined(VM_VAR_PREFIX)<br>
strcpy(varname,VM_VAR_PREFIX);<br>
strcat(varname,var);<br>
if ((value = getenv(varname))<br>
return value;<br>
#endif<br>
/* now the default prefix */<br>
strcpy(varname,"SQUEAK_");<br>
strcat(varname,var);<br>
return getenv(varname);<br>
}</p>

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