Is there a software, may be some very old versions, that can read a certain kind of corrupt PDF files?

Specifically, I'm collecting relic Unix specifications, and I want to read the System V Interface Definition from SCO.com. The downloadable PDFs are corrupt and have rendering bugs.

Paid proprietary softwares are fine. I'm fine with macOS, Windows10, and GNU/Linux.

  • The first 3 (API) on that page all download and view find for me in Chrome - it is important to note that the spurious looking margin right margin annotations G, M, X, etc., actually denote which revision of the Unix specification, etc., that a change to that line was made. Some people are also not used to seeing the crop marks on the corners of each page. Sep 13, 2020 at 15:33
  • @SteveBarnes I've spent some time reading it now, and I'm sure the content is incomplete. I downloaded the ones I have with Chrome and the reader didn't warn of corrupt data.
    – DannyNiu
    Oct 1, 2020 at 9:16
  • Particularly, the pages for the poll function is missing much of texts for possible pollable IO events.
    – DannyNiu
    Oct 1, 2020 at 9:28
  • Danny it is entirely possible that the files uploaded to the site are incomplete or even that the entire documentation is incomplete. If the downloaded files don't complain about corruption then they are probably the same as the files on the site. Did you note that some of the specifications, e.g. AMD64 only include the differences from the Intel386. I would suggest contacting SCO for checksums on the files. Oct 1, 2020 at 17:40


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