APLawrence.com -  Resources for Unix and Linux Systems, Bloggers and the self-employed

Renaming files (answer)


This is the answer to Detective: Renaming files

First, I did have a little hint here: I knew this customer had been thinking about buying a Mac. But the reason his files were being clobbered has to do with Mac's HFS+ file system: "Apple" and "apple" are NOT two different files. If he had begun his script with "set -o noclobber", Bash would have refused to overwrite, but as written, the "> $j" cleared out each file before the "sed" even ran.

Apple does have an optional HFSX file system which can be case sensitive. It isn't necessarily: Apple Tech Note TN1150 says:

An HFSX volume may be either case-sensitive or case-insensitive. Case sensitivity (or lack thereof) is global to the volume; the setting applies to all file and directory names on the volume. To determine whether an HFSX volume is case-sensitive, use the keyCompareType field of the B-tree header of the catalog file. A value of kHFSBinaryCompare means the volume is case-sensitive. A value of kHFSCaseFolding means the volume is case-insensitive.

Note: Do not assume that an HFSX volume is case-sensitive. Always use the keyCompareType to determine case-sensitivity or case-insensitivity.

Got something to add? Send me email.

(OLDER)    <- More Stuff -> (NEWER)    (NEWEST)   

Printer Friendly Version

-> -> Renaming files (answer)

Increase ad revenue 50-250% with Ezoic

More Articles by

Find me on Google+

© Anthony Lawrence

Kerio Samepage

Have you tried Searching this site?

Support Rates

This is a Unix/Linux resource website. It contains technical articles about Unix, Linux and general computing related subjects, opinion, news, help files, how-to's, tutorials and more.

Contact us