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/usr/share/epic4/script/sound is in epic4 1:2.10.5-2build2.

This file is owned by root:root, with mode 0o644.

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/*
 * A simple script to support DCC SOUND as specified by mirc
 * I got my info directly from Tjerk, so I claim total innocence 
 * if the implementation is wrong. :P
 */

on ^ctcp "% % SOUND ?*" 
{
	# Do the 'action' part of it
	switch ($4)
	{
		()  {echo *** This sound ($3) courtesy of $0}
		(*) {echo * $0 $4-}
	}
	switch ($3)
	{
		(*.wav) {exec -direct ${PLAYWAV} $3}
		(*)     {exec -direct ${PLAYWAV} $3.wav}
	}
}

/*
 * Usage: /sound <target|*> <wavfile> <action-text>
 * All the arguments are required, according to the specification.
 *
 * The first argument is who to send it to, '*' goes to current target
 * The second argument is the wav file to be played.  The receiver is
 *	assumed to have this wav file already..
 * The rest of the arguments are "action text", ala the /me command.
 */
alias sound ctcp $0 SOUND $1-

#hop'96