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POSIX ACLs Are Only as Clear as the Mask

POSIX ACLs Are Only as Clear as the Mask Traditional Unix permissions answer a simple question: what can the owner, group, and everyone else do?

  • POSIX ACLs depend on applied mask, limiting effective permissions
  • Access check algorithm considers mode bits, ACLs, user/group identities, and mask
  • Default ACLs on directories influence inherited permissions, override umask

How Tracing Contours Cut My rMQR SVG Path by 67%

Whenever I needed vector artwork to survive resizing, rotation, or a trip to the print shop, I had a familiar routine. Open Illustrator, select the pieces, click Unite in Pathfinder, and get on with…

  • Tracing contours reduced rMQR SVG path length by 67%
  • Contour tracing used single path with rectangular subpaths
  • Method proved more efficient than individual square representation

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