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A brief history of union mounts

A brief history of union mounts

Posted Aug 1, 2010 10:01 UTC (Sun) by neilbrown (subscriber, #359)
In reply to: A brief history of union mounts by nix
Parent article: A brief history of union mounts

It seems you are right.

http://www.opengroup.org/onlinepubs/9699919799/functions/...

appears to allow any read to be interrupted, and says in the "informative" section "The issue of which files or file types are interruptible is considered an implementation design issue. This is often affected primarily by hardware and reliability issues." which is singularly unhelpful.

I was basing my statements on "man 7 signal" which does talk about "slow" devices. Clearly this isn't normative....

As you say, POSIX by itself is enough to make one wince...


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A brief history of union mounts

Posted Aug 4, 2010 22:45 UTC (Wed) by nix (subscriber, #2304) [Link]

Quite so :/

Even 'man 7 signal' says clearly that 'The details vary across Unix systems; below, the details for Linux', and that's not terribly useful really for the vast majority of software. (I suppose you can rely on it in mdadm ;} )


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