View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0000128 | file | General | public | 2020-01-10 10:40 | 2020-02-15 01:02 |
| Reporter | roberto beltrami | Assigned To | christos | ||
| Priority | high | Severity | major | Reproducibility | sometimes |
| Status | resolved | Resolution | fixed | ||
| Platform | intel | OS | windows | OS Version | all |
| Product Version | 5.38 | ||||
| Fixed in Version | 5.39 | ||||
| Summary | 0000128: wrong detection of .pnx data files | ||||
| Description | .pnx are data files for our cad/cam system. I attacched 3 files, good.pnx is correctly detected as 'data' while err1 and err2 are detected as '68k Blit mpx/mux executable'. can you solve this? many thanks | ||||
| Tags | No tags attached. | ||||
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What's the CAD system name? Did you develop it internally or is it a commercial product? Where is the file format described? |
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The CAD system is NAXOS and we develop it internally. The file format is reserved. Most data is compressed and encrypted, so we don't have control over the byte sequences generated |
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no news? |
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Sorry, I've been busy. If there is no standard header in your files and they can contain any byte sequence, file(1) can't recognize them and different pnx files can will end up producing spurious matches. This cannot be fixed until the system produces files that have standard header... |
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I'm sure you understand that we cannot change our format just because your software detect as '68k Blit mpx/mux executable' a file that is something else. If it can help you, starting from offset 4 you find a 16bytes string (zero terminated) with letter P followed by the sw version that produced the file. for example, 'P19.1607.1627.0' or 'P20.1629.1631.0 '. please let me know best regards roberto |
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BTW, the numbers often change because we release new versions almost every month. so you should rely on the structure of the string Pxx.xxxx.xxxx.x and not the exact numbers |
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x are always 0-9, no letters nor special chars |
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Well, that pattern can be used as a magic number and I've already added it! The next version of the program will recognize PNX files: [8:02pm] 348>./file -m ../magic/magic.mgc *.pnx err1.pnx: NAXOS CAD System file from version P19.1629.1630.0 err2.pnx: NAXOS CAD System file from version P19.1607.1628.0 good.pnx: NAXOS CAD System file from version P19.1607.1615.0 |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2020-01-10 10:40 | roberto beltrami | New Issue | |
| 2020-01-10 10:40 | roberto beltrami | File Added: good.pnx | |
| 2020-01-10 10:40 | roberto beltrami | File Added: err2.PNX | |
| 2020-01-10 10:40 | roberto beltrami | File Added: err1.pnx | |
| 2020-01-17 17:48 | christos | Assigned To | => christos |
| 2020-01-17 17:48 | christos | Status | new => assigned |
| 2020-01-17 17:49 | christos | Status | assigned => feedback |
| 2020-01-17 17:49 | christos | Note Added: 0003345 | |
| 2020-01-20 08:54 | roberto beltrami | Note Added: 0003347 | |
| 2020-01-20 08:54 | roberto beltrami | Status | feedback => assigned |
| 2020-02-13 07:40 | roberto beltrami | Note Added: 0003355 | |
| 2020-02-13 20:39 | christos | Note Added: 0003359 | |
| 2020-02-13 20:39 | christos | Status | assigned => feedback |
| 2020-02-14 09:19 | roberto beltrami | Note Added: 0003362 | |
| 2020-02-14 09:19 | roberto beltrami | Status | feedback => assigned |
| 2020-02-14 09:22 | roberto beltrami | Note Added: 0003363 | |
| 2020-02-14 09:23 | roberto beltrami | Note Added: 0003364 | |
| 2020-02-15 01:02 | christos | Status | assigned => resolved |
| 2020-02-15 01:02 | christos | Resolution | open => fixed |
| 2020-02-15 01:02 | christos | Fixed in Version | => 5.39 |
| 2020-02-15 01:02 | christos | Note Added: 0003365 |
