APLawrence - Information and Resources for Unix and Linux Systems, Bloggers and the self-employed
RSS Feeds Get APLawrence.com by RSS

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.


Comments are closed for this page. You can comment at the "Answer" page.

Have you tried Searching this site?

Unix/Linux/Mac OS X support by phone, email or on-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. We appreciate comments and article submissions.

Publishing your articles here

Jump to Comments

Many of the products and books I review are things I purchased for my own use. Some were given to me specifically for the purpose of reviewing them. I resell or can earn commissions from the sale of some of these items. Links within these pages may be affiliate links that pay me for referring you to them. That's mostly insignificant amounts of money; whenever it is not I have made my relationship plain. I also may own stock in companies mentioned here. If you have any question, please do feel free to contact me.

Specific links that take you to pages that allow you to purchase the item I reviewed are very likely to pay me a commission. Many of the books I review were given to me by the publishers specifically for the purpose of writing a review. These gifts and referral fees do not affect my opinions; I often give bad reviews anyway.

We use Google third-party advertising companies to serve ads when you visit our website. These companies may use information (not including your name, address, email address, or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. If you would like more information about this practice and to know your choices about not having this information used by these companies, click here.

My Troubleshooting E-Book will show you how to solve tough problems on Linux and Unix systems!

book graphic unix and linux troubleshooting guide

 I sell and support
 Kerio Mail server


This post tagged:

Unix/Linux Consultants

Skills Tests

Guest Post Here