ps4pdf --version (return code: 0)
pdflatexps version 1.0
ps4pdf --help (return code: 0)
/usr/bin/ps4pdf [-v|-q|--crop|--version|--Xps2pdf OPT] FILE
Process LaTeX document FILE using the pst-pdf package,
including running latex, dvips, and ps2pdf as necessary.
--Xps2pdf OPT passes OPT to ps2pdf.
(-dAutoRotatePages=/None is always passed.)
--crop runs pdfcrop on ps2pdf output.