Union mounts (a.k.a., writable overlays) Union mounts allows you to mount exactly one read-write file system over exactly one read-only file system. The top layer file system must support whiteouts and fallthrus, which are special kinds of directory entries. Currently, ext2, jffs2, and tmpfs have fallthru and whiteout support (in the union mount git repository below). Get the code Union mounts req

This is a list of existing client and server implementations of the various variants of the 9P protocol. Name Version Client Server Lang Operating System(s) License Comments

seekdir のバグ は 25歳だったらしいが、もっと古い奴が他にも隠れているかもしれない。実際、最近発見された yacc のバグ は 33歳と言われている。 今回の虫発見のきっかけが新実装の malloc のテストで、再現環境は sparc64 のみ、というのが興味深い。発見者の otto 氏は最終的に 6th edition まで遡って調べている。そういう根性はとっても大事だと思う。そうやって調べたから虫の推定年齢がわかったわけだし。 コード検査の手法や技術は充分成熟していると思っていたが、まだ発展の余地があるのだろう。

What is Plan 9? A distributed operating system, developed as the research successor to Unix. Plan 9 is most notable for representing all system interfaces, including those required for networking and the user-interface, through the filesystem rather than specialized interfaces. What is Linux? An operating system kernel used by a family of Unix-like operating systems. In the early days, Linux rapid