[GRASS5] Arrow keys and default pager

[Robert Lagacé]

Markus Neteler wrote:
> 
> Hi Reinhard,
> 
> On Wed, Apr 04, 2001 at 02:47:12PM +0200, Reinhard Brunzema wrote:
> > "Eric G. Miller" schrieb:
> > >
> > > On Wed, Apr 04, 2001 at 10:43:26AM +0200, Reinhard Brunzema wrote:
> > > >
> > > > > Second issue: I see that the default pager for GRASS man pager is
> > > > > "more",
> > > > > but under linux the default pager is usually "less", much more powerful
> > > > > and easier to use. I'm getting tired of typing "export PAGER=less" every
> > > > > time I login in GRASS... couldn't it be a default option if "less" is
> > > > > available on the machine (at least under Linux)?
> > > >
> > > > Hallo,
> > > > I had the same thoughts a couple of days before. A possible solution
> > > > would be:
> > > >
> > > > Replacing the lines
> > > > ---
> > > >       # Set some environment variables if they are not set
> > > >       if [ ! "$PAGER" ] ; then
> > > >               PAGER=more
> > > >               export PAGER
> > > >       fi
> > > > ---
> > > > with
> > > > ---
> > > >       # Set some environment variables if they are not set
> > > >       if [ ! "$PAGER" ] ; then
> > > >               lesspath=`which less 2> /dev/null`
> > > >               if [ -x "$lesspath" ] ; then
> > > >                       PAGER=less
> > > >               else
> > > >                       PAGER=more
> > > >               fi
> > > >               export PAGER
> > > >       fi
> > >
> > > The "which" command is not Bourne Shell (unfortunately).  I've seen
> > > hacks to emulate it...
> >
> > Something like:
> > ---
> >               # Search for a wish program
> >               WISH=
> >
> >               for i in `echo $PATH | sed 's/^:/.:/
> >                                           s/::/:.:/g
> >                                           s/:$/:./
> >                                           s/:/ /g'`
> >               do
> >               if [ -f $i/$GRASS_WISH ] ; then
> >                       WISH=$GRASS_WISH
> >                       break
> >               fi
> >               done
> > ---
> > (taken from Init.sh)
> > I don't understand, why assuming "sed" is available is better than
> > assuming "which" is available. Init.sh already uses several non-sh
> > commands (sed, awk, grep, whoami). Why not "which"?
> 
> here some explanations:
> Unfortunately especially "which" doesn't appear on various platforms.
> And also "type -p" even doesn't work everywhere. The others (sed, awk, grep,
> whoami) are more common. That's the standardized un*x world :-(
> 
> o Linux: $> alias which
>   alias which='type -p'
> 
>   $> type -p grass5
>   /usr/local/bin/grass5
> 
> Solaris: $> alias which
>   alias: 'which' not found
> 
>   $> type -p grass5
>   /usr/local/bin/grass5
> 
> CRAY: $> alias which
>   which: alias not found
> 
>   $> type -p grass5
>   /usr/local/bin/grass5
> 
> We have found platforms (was it SGI) where "type -p" is not present. Urgs