argscan
static void argscan(char *s);
if(s = getenv("MORE")) argscan(s);
argscan(*fnames+1);
unsigned char *argscan = argi;
if (letter(*argscan))
while (alphanum(*argscan))
argscan++;
if (*argscan == '=')
*argscan = 0; /* make name a cohesive string */
*argscan++ = '=';
n->namenv = n->namval = argscan;
assign(n, argscan);