This wrapper script invokes
with following arguments
-q -dNOPAUSE -dBATCH -sDEVICE=pdfwrite
as well as the appropriate
-dOutputFile argument, all preceded and followed by any command-line arguments. Finally, the security option
-dSAFER is prepended before all the other options.
ps2pdf scripts all invoke this one with the addition of the respective compatibility level option.