[Octave-bug-tracker] [bug #64473] octave does not allow saving figures to stdout

[Janez Žemva]

URL:
  <https://savannah.gnu.org/bugs/?64473>

                 Summary: octave does not allow saving figures to stdout
                   Group: GNU Octave
               Submitter: janezz55
               Submitted: Wed 26 Jul 2023 07:56:17 AM UTC
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Unexpected Error or Warning
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
                 Release: 8.2.0 8.X Series Bug Fix Release 
         Discussion Lock: Any
        Operating System: Any
           Fixed Release: None
         Planned Release: None


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Follow-up Comments:


-------------------------------------------------------
Date: Wed 26 Jul 2023 07:56:17 AM UTC By: Janez Žemva <janezz55>
I need to stave figures in svg and png formats to stdout, unfortunately this
does not work:

saveas(gcf, "/dev/stdout", "svg");

error: print: cannot open file /dev/stdout.svg for writing
error: called from
    print at line 447 column 7
    saveas at line 150 column 5

I have traced the issue to the file __print_parse_opts__.m, line 358:

  if (dot == 0 && ! isempty (arg_st.name) && ! isempty (default_suffix))
    arg_st.name = [arg_st.name "." default_suffix];
  endif

I propose either a new print option (e.g. -noextappend) is added, or a special
filename (e.g. -) is designated as stdout (what to do with stderr?).

The issue on SO:
https://stackoverflow.com/questions/76746221/save-octave-figure-to-stdout







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