Re: [Plplot-devel] -h command-line issue on Cygwin

[Arjen M. <Arj...@de...>]

Hi Alan,



> -----Original Message-----
> From: Alan W. Irwin [mailto:ir...@be...]
>
> Hi Arjen:
>
> Since both x01c and x01f have special command-line parsing, I suggest the first
> thing you should do is try other C and Fortran examples (e.g., x00c or x00f) to see
> if the -h option works in those less special cases. My guess is it won't work, i.e., the
> problem you discovered with the -h option on Cygwin is a general one for our
> standard C and Fortran examples rather than specific to just x01f.
>
Same behaviour ;).

> I looked up the popen man page on Linux which states it "opens a process by
> creating a pipe, forking, and invoking the shell". So I assume what the above code
> fragment does is redirect the normal output of the -h option from stdout to whatever
> you have specified as the PAGER environment variable or the "more" pager as a
> fallback if you have not specified PAGER.
>
> So I suspect what has happened on your Cygwin platform is you don't have any
> pager installed.  You should be able to fix that by installing "more" via the "util-linux"
> package and/or "less" via the "less" package (while setting your PAGER
> environment variable to "less").
>
> Let me know whether one or the other of those two measures fixes the above -h
> issue.

No, there is a "more" installed in /usr/bin/more and that works fine when invoked through the command line. For some reason the plplarse routine seems to try and start a bare-Windows command: "c:\program" in the error message is just the start of the directory name under which commands and programs can be found. A workaround would be not to use this feature on any Windows platform.

>
> By the way, I highly recommend "less" as a much better pager than "more".  So the
> developers of "less" used some self-deprecating humor when they picked the name
> of their pager.  :-)
>

Why exactly? They have similar functionality, don't they?

Regards,

Arjen

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