Linux

48622 readers

1292 users here now

From Wikipedia, the free encyclopedia

Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).

Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.

Rules

Posts must be relevant to operating systems running the Linux kernel. GNU/Linux or otherwise.
No misinformation
No NSFW content
No hate speech, bigotry, etc

Related Communities

Community icon by Alpár-Etele Méder, licensed under CC BY 3.0

founded 5 years ago

MODERATORS

[email protected]

101

The perils of transition to 64-bit time_t (blogs.gentoo.org)

submitted 2 months ago by [email protected] to c/[email protected]

11 comments fedilink hide all child comments

you are viewing a single comment's thread
view the rest of the comments

[–] nyan 7 points 2 months ago

One thing people reading this should remember is that you cannot guarantee all packages on a Gentoo system will be updated simultaneously. It just can't be done. Because several of the arches affected by this are old, slow, and less-used (32-bit PowerPC, anyone?), it's also impossible to test all combinations of USE flags for all arches in advance, so sooner or later someone will have something break in mid-compile. For this change, that could result in an unbootable system, or a badly broken one that can't continue the upgrade because, for example, Python is broken and so portage can't run.

The situation really is much more complicated than it would be on a binary distro whose package updates are atomic. Not intractable, but complicated.

That being said, even a completely borked update would not make the system unrecoverable—you boot from live media, copy a known-good toolchain from the install media for that architecture over the borked install, chroot in, and try again (possibly with USE flag tweaks) until you can get at least emerge --emptytree system or similar to run to completion. It's a major, major pain in the ass, though, and I can understand why the developers want to reduce the number of systems that have to be handled in that way to as few as possible.