Menu
▾
▴
Re: [Gnuplot-info] system independent access to home folder and script folder?
|
From: Alan <ala...@gm...> - 2026-02-26 19:23:36
|
I believe (?) your suggestion is equivalent to using `system`, so it is not a cross-platform solution. E.g., on Windows: gnuplot> print "`echo $HOME`" $HOME (Note that $HOME is valid in PowerShell, but sadly cmd remains the Windows default shell, and changing that remains fraught.) On Thu, Feb 26, 2026 at 1:46 PM Michael Schuh < Mic...@bo...> wrote: > How about this? > > michael@argon:~/tmp$ cat p.gnu > home = "dogrun" > print home > home = "`echo $HOME`" > print home > > > michael@argon:~/tmp$ gnuplot p.gnu > dogrun > /home/michael > > On Thu, Feb 26, 2026 at 10:06 AM Alan <ala...@gm...> wrote: > >> Thanks for helping to look for a workaround, but I do not think so. >> >> Too many different computers and people involved. >> >> Let me ask this differently. >> According to the manual (p.64), "The program then looks in the user’s HOME >> directory". >> So after launching, Gnuplot has already determined the location of the >> home >> directory. >> Is there any way to ask Gnuplot for its value (as a string)? >> If not, is there any reason for developers to avoid adding such a feature? >> >> Thanks, Alan >> >> On Thu, Feb 26, 2026 at 10:51 AM Peter Rockett <p.r...@sh... >> > >> wrote: >> >> > OK. Is the GNUPLOT_LIB environment variable what you need? Or the >> > .gnuplot & GNUPLOT.INI startup files? >> > >> > P. >> > >> > On 26/02/2026 14:12, Alan wrote: >> > > I would like to have data stored both >> > > relative to the script file and more importantly relative to the home >> > > directory, >> > > and I would like an easy way to find the data on multiple systems >> > > where the same relative relationships hold. >> > > >> > > Most important is being able to find the home directory >> > > in the gnuplot script in a system independent way. >> > > For example, I'd like my home and work computers >> > > to have an output folder that is fixed relative to the home directory, >> > > and I'd like Gnuplot to be able to find it without relying on >> `system`, >> > > which requires a different commands depending on the shell. >> > > (Powershell or cmd on Windows, vs zsh on Mac, vs bash or dash on >> Linux, >> > > etc.) >> > > >> > > Also desirable is for the script to be able to find data >> > > relative to the script's location, no matter what the >> > > current working directory from which Gnuplot is launched. >> > > As a simple example, suppose I am in folder `a` and do >> > > gnuplot ./gnuplot/myscript.gpi >> > > Then the pwd for Gnuplot becomes `a`, not the script directory. >> > > In the script, I'd like to ask Gnuplot for the script directory. >> > > >> > > Hope that's clearer, Alan >> > > >> > > On Thu, Feb 26, 2026 at 7:34 AM Peter Rockett via gnuplot-info < >> > > gnu...@li...> wrote: >> > > >> > >> Not totally clear of the objective here, but FWIW, you can specify a >> > >> path using "./abc/efg/hij" (i.e. using a forward slash) on both >> Windows >> > >> /and/ Unix/Linux, whereas Unix does not understand the '\' character >> in >> > >> this context. So the forward slash is system independent. >> > >> >> > >> P. >> > >> >> > >> On 25/02/2026 18:10, Alan wrote: >> > >>> Does Gnuplot offer a system independent way to >> > >>> create directory names relative to the home folder (especially) >> > >>> and also relative to the script folder? >> > >>> >> > >>> I am aware of `system`, but that depends on the OS shell. >> > >>> I'm not a C programmer, but I believe the tricks to retrieve this >> > >>> information in a system independent way are pretty standard. (?) >> > >>> >> > >>> Thank you. >> > >>> >> > >>> _______________________________________________ >> > >>> gnuplot-info mailing list >> > >>> gnu...@li... >> > >>> Membership management via: >> > >> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >> > >> _______________________________________________ >> > >> gnuplot-info mailing list >> > >> gnu...@li... >> > >> Membership management via: >> > >> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >> > >> >> > > _______________________________________________ >> > > gnuplot-info mailing list >> > > gnu...@li... >> > > Membership management via: >> > https://lists.sourceforge.net/lists/listinfo/gnuplot-info >> > >> >> _______________________________________________ >> gnuplot-info mailing list >> gnu...@li... >> Membership management via: >> https://lists.sourceforge.net/lists/listinfo/gnuplot-info >> > |
