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> perldoc -f read
read FILEHANDLE,SCALAR,LENGTH Attempts to read LENGTH bytes of data into variable ... beginning. The call is actually implemented in terms of stdio's fread(3) call. To get a true read(2) system call, see "sysread".
$"=q;grep;;$,=q"grep";for(`find . -name ".saves*~"`){s;$/;;;/(.*-(\d+) +-.*)$/;$_=["ps -e -o pid | "," $2 | "," -v "," "]`@$_`?{print" ++ $1"}:{print"- $1"}&&`rm $1`;print"\n";}