uutils / uutils/coreutils

bug(uniq): when using `/dev/mem` it stopped before the end of the file

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U - uniq
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Description

Hi, uutils mainteners

i confirmed in my side, the uu uniq truncated some reachable text, which the gnu one fully outputted

the uutils output look like that note it is truncated, because the device large

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uniq: read error: Permission denied

while the gnu uniq

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8(-
gnuuniq: error reading '/dev/mem': Operation not permitted

look the 8(- missing on the uu output whiches fully reachable

NOTE: that was just an example, for reproduce it in your /dev/mem, compare the output of uu and gnu uniq both and see is anything missing, /dev/mem is different across machine

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by comparing uutils uniq with GNU uniq on /dev/mem, using the reported missing 8(- bytes as the symptom. Trace how each command handles the device read and its permission error; done means uutils does not omit reachable output before reporting the read failure, with behavior verified on a reproducible test input.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
cli, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
42/100

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