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An unexpected perf feature
LWN.net Weekly Edition for May 16, 2013
A look at the PyPy 2.0 release
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LWN.net Weekly Edition for May 9, 2013
Aha. So... everybody knows it is possible to have files with odd filenames, and everybody keeps on using shells or shell constructs that cannot deal with this properly? I can see the flaw in that.
>something that can iterate over files and run one command on each when it must handle files that have those in the name?
for i in *; do cmd "$i"; done;
find . -whatever -exec cmd \;
find . -whateverelse -print0 | xargs -0 cmd;
There are so many safe ways available. I am really not responsible for people doing UUOC or thelike.
Control characters in file names
Posted Nov 25, 2010 20:31 UTC (Thu) by Spudd86 (guest, #51683)
Posted Nov 25, 2010 21:48 UTC (Thu) by jengelh (subscriber, #33263)
Posted Nov 25, 2010 22:00 UTC (Thu) by Spudd86 (guest, #51683)
see here: http://www.dwheeler.com/essays/filenames-in-shell.html and here: http://www.dwheeler.com/essays/fixing-unix-linux-filename... although for some reason I remember it being much worse than that, though being correct everywhere in your script could eventually be a pain.
Posted Dec 2, 2010 19:19 UTC (Thu) by Ross (subscriber, #4065)
Posted Nov 25, 2010 23:30 UTC (Thu) by cmccabe (guest, #60281)
The for loop should be
for i in *; do cmd "./$i"; done;
In case one of the filenames begins with a dash.
Posted Nov 26, 2010 10:28 UTC (Fri) by Yorick (subscriber, #19241)
To illustrate the last point: The only possible delimiter for files names is currently the null byte, which is not very practical in many languages and in shell scripting in particular. Linefeeds would be much more natural and are supported by many more tools.
The benefits are clear, and the costs appear to be very low. The only serious objection I have seen so far concerns existing file names using an ISO 2022-based encoding. There are several possible solutions: allowing the control character restriction to be lifted as a per-mount option (possibly only allowing ESC, SI and SO), or a mount option that recodes into UTF-8.
Posted Nov 29, 2010 16:30 UTC (Mon) by nix (subscriber, #2304)
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