issue #7290 error: Problem running ghostscript gs -q -g562x56 -r384x384x -sDEVICE=ppmraw -sOutputFile=_form0.pnm -dNOPAUSE -dBATCH -- _form0.ps. Check your installation!

@maehr had a talk with Robin Watts and Ken Sharp at IRC and there seem to be basically 3 different problems:
* `-r%dx%d` (the dimension for `r` shouldn't be `-r384x384x`, but `-r384x384`),
* misuse / unnecessary use of `--` and
* since 9.50 the command needs more control access (that might be worked around by either whitelisting the file via `--permit-file-read=_form0.eps` (only works from 9.50 and upwards) or generally accepting any file with `-dNOSAFER` (works since quite some time). The second option is considered to be unsafe if we would process any file, but in this case we process self produced / controlled files. I don't know if doxygen has any threat model that it assumes. ).

> Ken Sharp: Yeah the %dx is wrong, as Robin says its sheer luck that works
the -- isn't needed and is what's causing the first problem
and file control is the new bugbear

The suggestions have been implemented and test / docs works now with old and new version.

1 files changed, 2 insertions, 2 deletions

diff --git a/src/formula.cpp b/src/formula.cpp
index 534f56a..3d8e6ce 100644
--- a/src/formula.cpp
+++ b/src/formula.cpp
@@ -193,8 +193,8 @@ void FormulaList::generateBitmaps(const char *path)
       // used.  
 
       char gsArgs[4096];
-      sprintf(gsArgs,"-q -g%dx%d -r%dx%dx -sDEVICE=ppmraw "
-                    "-sOutputFile=%s.pnm -dNOPAUSE -dBATCH -- %s.ps",
+      sprintf(gsArgs,"-q -g%dx%d -r%dx%d -sDEVICE=ppmraw "
+                    "-sOutputFile=%s.pnm -dNOPAUSE -dBATCH -dNOSAFER %s.ps",
                     gx,gy,(int)(scaleFactor*72),(int)(scaleFactor*72),
                     formBase.data(),formBase.data()
              );