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Top Forums UNIX for Dummies Questions & Answers Cp problems, file exists but error message Post 302766545 by Don Cragun on Tuesday 5th of February 2013 01:56:03 AM
Old 02-05-2013
Quote:
Originally Posted by bakunin
Actually the problem is some PEBKAC:

... ... ...

"[FO3*]" will expand to a list of all files which names start with "[FO3", end with "]" and have any number of characters of any sort (including none at all) in between these two parts. For example: "[F03]", "[F03x]", "[F03foobar]", etc..

... ... ...

bakunin
No. As radoulov said earlier, the file matching pattern [F03*] will only match the four files with names F, 0, 3, and *. (The asterisk isn't special in a file matching pattern inside square brackets.)

Even scarier is that the command:
Code:
cp [F03*] [SMER_2.03.13.spu]

could succeed if a file named F, 0, 3, or * or any combination of them exist as regular files AND at least one of E, M, R, S, _, p, s, or u exists as a file and the last such file in this list (assuming you are using a locale with a code set based on ASCII) exists and is a directory. If all of those conditions are true, the regular files matched by both patterns would be copied to the directory named by the last file matching the second pattern.

If none of the single character names matched by the second pattern existed and exactly one of the names matched by the first pattern existed as a regular file, it would be copied to a new regular file named [SMER_2.03.13.spu], but that can't happen because . always exists.
 

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