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Re: emacs changed file's own user and file permission


From: Xah Lee
Subject: Re: emacs changed file's own user and file permission
Date: Tue, 11 Dec 2007 21:00:57 -0800 (PST)
User-agent: G2/1.0

Dear Eli Zaretskii moron,

Eli wrote:
《What do you think is the limit of a file-name length on your
system? 》

Xah wrote:
《
Huh?? What do i think is the limit? Are you trying to say, by a
rhetorical question, that what i think so is probably not right?

If the average file name char length is n, and your file that emacs
going to do the backup is in m levels of dir nesting. Then, the backup
file char length is n*m+n.

m*n+n is a order of magnitude of n. If n is the max length allowed,
you can easily see how the emacs scheme easily go beyond it.  In real
world, probably 99.99% of people will never use more than 10% of the
max length in file names, and probably will never have subdirs that
are nested more than, say, 10 levels deep. So this means that 99% of
those who uses this emacs backup scheme will prob not encounter the
problem of it reaching file name legth limit. It will be a problem for
sizable number of programers however (maybe hundreds or thousands,
worldwide), since there are a software implementations (say, those
uses file system as database) easily will make fully use the file name
length and dir nesting limit.
 》

Eli replies, the whole of the content in his post:
《Yes.  Most modern file systems either have no practical limit at all,
or have such a large limit that you will in practice never reach it. 》

Note: this post contains unicode chars U+300A and U+300B as quotation
brackets. Google groups may bave botched it.

  Xah
  address@hidden
\xAD\xF4 http://xahlee.org/



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