Class Utils.OS Extends %RegisteredObject
{

ClassMethod Call(cmd, echo = 1) As %List
{
	// instatiate pipe object
	S list=""
	S pipe=##class(%File).%New(cmd)
		
	TRY {
		//
		S sc=pipe.Open("QR")
		I $$$ISERR(sc) Q
		
		// read queue/pipe and output to screen
		DO {
			K len S line=pipe.ReadLine(.len) I len=-1 Q
			S $LI(list,$I(pos))=line
			I echo W line,!
		} WHILE $G(pos)<1000
		
	} CATCH {
		S ZE=$ZE
		BREAK
	}
	
	// close pipe
	D pipe.Close()
	
	// return list value
	Q list
}

}