Bug 689953

Summary: Epson AcuLaser cannot output to pipe (contributed code by Epson)
Product: Ghostscript Reporter: Joerg Wunsch <j>
Component: Printer DriverAssignee: Marcos H. Woehrmann <marcos.woehrmann>
Status: NOTIFIED FIXED    
Severity: normal    
Priority: P4    
Version: 8.62   
Hardware: PC   
OS: FreeBSD   
Customer: Word Size: ---
Attachments: gdevescv.c.patch

Description Joerg Wunsch 2008-07-09 02:07:26 UTC 
The printer driver in contrib/eplaser/gdevescv.c cannot output to a pipe.
As usual printer filters (like foomatic for CUPS) have a tendency to use
pipes (like -sOutputFile="| cat >&3"), this becomes fatal for printers
supported by this driver.

The reason is because the driver uses gdev_vector_open_file_bbox()
which inherently implies that the output can be opened as a seekable
file.  It should use gdev_vector_open_file_options with the
VECTOR_OPEN_FILE_BBOX and VECTOR_OPEN_FILE_SEQUENTIAL_OK options
instead.
Comment 1 Joerg Wunsch 2008-07-09 02:08:40 UTC 
Created attachment 4193 [details]
gdevescv.c.patch

Suggested fix.
Comment 2 Joerg Wunsch 2008-07-09 02:12:09 UTC 
I just verified the same code is still present in the SVN trunk.
Comment 3 Ralph Giles 2008-07-10 14:47:41 UTC 
I recommend applying.
Comment 4 Marcos H. Woehrmann 2008-07-14 11:53:58 UTC 
Applied as r8839.