headers of the query

when we are spooling query o/p to certain txt file,in that file how we can get headers in the query.(through unix shell scripting).

for exmple

q1="slect * from XXXXXX;";

sqlplus XXX/XXXX@XXXXX

spool XXXX.txt
$q1
spool off

in the text file i want the headers of the query.....

plese suggest...