Re: [Lynx-dev] Minor XLOADIMAGE quirk

[Thomas Dickey]

On Sun, 20 Jul 2008, Patrick wrote:

> [...]
> MIME_LIBDIR                         "/etc/"
> [...]
> and a few lines from the trace look like it's reading
> from /etc/mailcap .

That would be the GLOBAL_MAILCAP setting (see lynx.cfg).
There is a compiled-in value for it, but it doesn't show up as
a compile-time option (since it's "owned" by userdefs.h, and
not set by the configure-script).

MIME_LIBDIR is set by the configure script, and is used in the
default (unpatched/unedited) userdefs.h like this:

#define GLOBAL_MAILCAP MIME_LIBDIR "mailcap"


> In /etc/mailcap ;
> [...]
> image/png; /usr/X11R6/bin/xli '%s'; test=test -n "$DISPLAY"; description=PNG 
> Image; nametemplate=%s.png
> image/x-ms-bmp; /usr/X11R6/bin/xli '%s'; test=test -n "$DISPLAY"; 
> description=BMP Image; nametemplate=%s.bmp
> image/x-cmu-raster; /usr/X11R6/bin/xli '%s'; test=test -n "$DISPLAY"; 
> description=CMU-RasterFile Image; nametemplate=%s.ras
> [...]
>
> [Please excuse the long lines.]
>
>
> And in the trace file;
> [...]
> ../HTInit.c: 465: ProcessMailcapEntry Setting up conversion image/png : 
> /usr/X11R6/bin/xli '%s'
> ../HTInit.c: 430: ProcessMailcapEntry: Found testcommand:test -n "$DISPLAY"
> ../HTInit.c: 452: ProcessMailcapEntry: Ignoring mailcap flag 'nametemplate'.
> ../HTInit.c: 853: PassesTest: Testing for XWINDOWS environment.
> ../HTInit.c: 855: PassesTest: Test passed!
> ../HTInit.c: 465: ProcessMailcapEntry Setting up conversion image/x-ms-bmp : 
> /usr/X11R6/bin/xli '%s'
> ../HTInit.c: 430: ProcessMailcapEntry: Found testcommand:test -n "$DISPLAY"
> ../HTInit.c: 452: ProcessMailcapEntry: Ignoring mailcap flag 'nametemplate'.
> ../HTInit.c: 853: PassesTest: Testing for XWINDOWS environment.
> ../HTInit.c: 855: PassesTest: Test passed!
> [...]
>
> Just two of many tests, of course.  Those are the first two
> entries that mention xli, in both files.

That looks consistent

> That seems more or less as it should be, except I don't see why
> it's being so stubborn.  Are these values compiled in, or does it
> re-read /etc/mailcap whenever it runs?  Changing it between
> launches didn't seem to have any effect.

It reads the data from mailcap - mostly.  In lynx.cfg, you can specify
your own mailcap as well as the location of the global one.

Again, userdefs.h defines a symbol:

#define XLOADIMAGE_COMMAND "xli %s &"

However, you can override this in lynx.cfg:

# Unix:
# =====
# XLOADIMAGE_COMMAND will be used as a default in src/HTInit.c for
# viewing image content types when the DISPLAY environment variable
# is set.  Make it the full path and name of the xli (also know as
# xloadimage or xview) command, or other image viewer.  It can be
# anything that will handle GIF, TIFF and other popular image formats
# (xli does).  The freeware distribution of xli is available in the
# ftp://ftp.x.org/contrib subdirectory.  The shareware, xv, also is
# suitable.  You must also have a "%s" for the filename; "&" for
# background is optional.  The default is defined in userdefs.h and can be
# overridden here, or via the global or personal mailcap files (see below).
# Make this empty (but not commented out) if you don't have such a
# viewer or don't want to disable the built-in default viewer
# mappings for image types.
# Note that open is used as the default for NeXT, instead of the
# XLOADIMAGE_COMMAND definition.
# If you use xli, you may want to add the -quiet flag.
#
#XLOADIMAGE_COMMAND:xli %s &

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net