[Octave-bug-tracker] [bug #54064] Behavior of open with unknown or non-existing files

[Pantxo Diribarne]

Follow-up Comment #3, bug #54064 (project octave):

I attached a very simple wrapper around libmagic, that I tested as follows:


im = rand (10,10,3);
fname = "toto.titi";

## Images
fmts = {"png", "tiff", "gif", "jpeg"};
for ii = 1:numel (fmts)
  fmt = fmts{ii}
  imwrite (im, fname, fmt);
  disp (fileinfo (fname))
  disp ("")
endfor

## Octave generated data
fmts = {"-v7", "-binary", "-text", "-zip", "-hdf5"};
for ii = 1:numel (fmts)
  fmt = fmts{ii}
  save (fmt, fname, "im");
  disp (fileinfo (fname))
  disp ("")
endfor


and here is the result


fmt = png
PNG image data, 10 x 10, 8-bit/color RGB, non-interlaced

fmt = tiff
TIFF image data, little-endian

fmt = gif
GIF image data, version 89a, 10 x 10

fmt = jpeg
JPEG image data, JFIF standard 1.01

fmt = -v7
Matlab v5 mat-file (little endian) version 0x0100

fmt = -binary
Octave binary data (little endian)

fmt = -text
ASCII text

fmt = -zip
gzip compressed data, from Unix

fmt = -hdf5
Hierarchical Data Format (version 5) data



If you want to test, you need to install the developper version of libmagic
and compile fileinfo.cc as follows


mkoctfile -lmagic ./fileinfo.cc




(file #44307)
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Additional Item Attachment:

File name: fileinfo.cc                    Size:1 KB


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