python-pillow / python-pillow/Sane

Sane leaks filedescriptors

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Dominant language
C
Stars
61
Forks
22
PR merge metrics
No merged PRs in 30d

Description

the init/exit sequence is not cleaning up all resources. this short sequence shows the case:

from sane import init, get_devices, exit as deinit

for _ in range(99):
	init()
	d = get_devices()
	with open("/etc/hosts") as f:
		print(f.fileno())
	deinit()

as you can see the fd will increase (by 78 in my case).

Contributor guide

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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 running the supplied loop and tracing the init(), get_devices(), and deinit() entry points involved in SANE resource cleanup. Compare file-descriptor counts across repeated iterations; done means the count remains stable after deinit() instead of increasing.

Written by the indexing model from the issue text.

Assessment

Tech stack
c, python
Domain
backend, operating-systems
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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