hfs-user

hfs-user@lists.mars.org

183 discussions

Start a nNew thread

unsubsribe
by Emmanuel Pagnacco 28 Mar '02

28 Mar '02

1 0

Restrictions on root/index nodes ???
by Entwicklung 27 Mar '02

27 Mar '02

Hello listers, I've encountered a problem which I am not able to attribute to anything particular and would like to know if I am making any basic mistake or have overlooked something. I'm creating a catalog B-Tree with 1 root node (index) containing five ptr recs to a second level of five index nodes, each of which contains 11 pointer records to 11 leaf nodes each. The problem I'm facing is that the files referenced by the last 22 ptr recs i.e. in the last 2 lower level index nodes are not readable on my Mac although the correct Icons do appear and all my files are displayed. I think there must be some problem with the referencing (data fork locations in the leaf nodes) so I checked this but it seems to be fine (just like it is for the first 3 index nodes which work perfectly) . Since all the icons get displayed correctly I thought the problem must lie within the leaf nodes but this doesn't seem to be the case. On my Mac I get an error of the form "Schreib/Lese Fehler" or "Read/Write error"..... What could this be due to ? Checking with hfsutils under Linux gives me the error "Wrong logical location" or similar.... does anybody know what this is due to? I think it must be some basic mistake I am making (related to the HFS-Specifications perhaps ?) but I have been unable to narrow it down so far..(hlp!).. would be glad of some professional advice. Regards, Nandini Hengen

3 3

Mac Error Codes
by Entwicklung 26 Mar '02

26 Mar '02

Hi, I remember I had asked the list a long time back if anyone knew where to find a list of Mac error codes. I found them and the link is: http://www.cbcu.cam.ac.uk/gds/errorcodes.htm for anyone else who needs it too. - Nandini

1 0

Restrictions on root/index nodes ???
by Entwicklung 26 Mar '02

26 Mar '02

Hello listers, This is wrt my previous email to the list.... I just noted that if I try copying files over from my CD to my desktop (i.e. those files which I could open and read initially from my CD ) I get the error - The file 'xyz.txt' can't be read since a read/write error has occured - Do you wish to proceed ? And when I say yes it doesn't get copied anyway (as expected ). Does anyone have an inkling as to what this could be due to ? I'm probably missing out on something basic here and need to proceed... any suggestions/tips would be greatly appreciated. Regards, Nandini Hengen

1 0

Clarification needed wrt B/B*-Trees
by Entwicklung 26 Mar '02

26 Mar '02

Hello listers, The technical notes for HFS+ TN1150 refers to 'B-Trees' and the documentation for HFS in 'Inside Macintosh - Data Organisation on volumes' refers to 'B*- Trees' Going by the definitions provided by NIST (the national institute of standards) a B-Tree is defined as Definition: A balanced search tree in which every node has between t-1 and 2t-1 children, where t is an arbitrary constant. This is a good structure if much of the tree is in slow memory (disk), since the height, and hence the number of accesses, can be kept small, say one or two, by picking a large t. and a B*-Tree is defined as : Definition: A B-tree in which nodes are kept 2/3 full by redistributing keys to fill two child nodes, then splitting them into three nodes. As far as I can gather from the definitions and the documentation, HFS uses a B*-Tree and HFS+ uses a B-Tree.... does anybody know why ? Does this mean that in case of HFS I would have to perform an additional redistribution of keys to keep the nodes just 2/3 full ( which I am not considering right now ) ? The HFS-Specs as such do not mention anything about keeping the nodes just 2/3 full ...or am I wrong there ? Would be glad to hear your comments/feedback ... Regards, Nandini Hengen

3 3

Mkhybrid application and HFS image
by Biswaroop Banerjee 20 Mar '02

20 Mar '02

Hi, Can anybody tell me whether the image file created by the mkhybrid premastering application on Linux dumps the files 2 times i.e. once for the ISO and then for the HFS. or they dump the file contents only once and provide ISO view and HFS view for the same. If not?? then is it possible how to do it?? Again, can anybody give me a link to shareware programs on Windows which will create HFS image from Windows selected files. regards Biswaroop

5 4

Re: [hfs-user] Mapping of filename-extensions
by Entwicklung 20 Mar '02

20 Mar '02

Thanks a ton ! That's exactly what I needed. Regards, Nandini Hengen ----- Original Message ----- From: "Chris Harwell" <charwell(a)digitalpulp.com> To: "Entwicklung" <entwicklung(a)whengenibk.de> Sent: Wednesday, March 20, 2002 4:23 PM Subject: Re: [hfs-user] Mapping of filename-extensions > On Wed, 20 Mar 2002, Entwicklung wrote: > > > Hello everybody, > > I'm looking for some kind of exhaustive list which maps filename extensions onto creator and filetype for MacOS ...say files with extension ".pdf" could be mapped on to a default filetype "PDF " and default creator "CARO" (4-byte values). > > > > I could get hold of these mappings using a freeware tool and a bit of reverse-engineering but I'd rather stick to a standard mapping if anything like that is available. Somebody had told me I could retrieve this info from a Sytem-file on my iMac but I was unable to open this file and view its contents. > > Would be grateful to anyone who knows something about this and can help me out. > > > > Regards, > > Nandini Hengen > hello, > > this list is from the netatalk distribution - seems similar to what your > looking for. i got it from http://sourceforge.net/projects/netatalk/ > > -- > chris > charwell(a)digitalpulp.com >

1 0

Mapping of filename-extensions
by Entwicklung 20 Mar '02

20 Mar '02

Hello everybody, I'm looking for some kind of exhaustive list which maps filename extensions onto creator and filetype for MacOS ...say files with extension ".pdf" could be mapped on to a default filetype "PDF " and default creator "CARO" (4-byte values). I could get hold of these mappings using a freeware tool and a bit of reverse-engineering but I'd rather stick to a standard mapping if anything like that is available. Somebody had told me I could retrieve this info from a Sytem-file on my iMac but I was unable to open this file and view its contents. Would be grateful to anyone who knows something about this and can help me out. Regards, Nandini Hengen

2 1

Fw: Fw: desktop database
by Entwicklung 18 Mar '02

18 Mar '02

----- Original Message ----- From: "Entwicklung" <Entwicklung(a)WHengenIBK.de> To: "Matthew Jarjoura" <mjarjo1(a)gl.umbc.edu> Sent: Monday, March 18, 2002 7:53 AM Subject: Re: Fw: desktop database > Hello, > Thanks for replying. > > > What exactly are you hoping to accomplish by reading the Desktop DB file? > > I doubt Apple wants someone writing code that messes with that file > > anyway. Besides Desktop DB is part of Mac OS 9 code. Mac OS X uses .rc > > files per directory that I believe you can open with "Property List > > Editor." > > > > If you want to save the state of a directory in Mac OS 9, all meta data is > > stored when using .SIT and .HQX compression. Using Toast to burn a CD > > also saves that meta data. > > I'm trying to create an external HFS image from another platform - i.e. I > want to write the desktop DB file into my image which is then written onto > an external volume which I want to be readable under Mac OS 9 > and earlier. I've gathered that this is not absolutely necessary to ensure > readability but that it would improve user-experience for Mac users to an > extent ( when files present on my external volume were created using > applications not installed on the Mac for instance ). I'm not considering > recording a CD under Mac OS or saving the state of any directories already > present on the Mac. And I'm not considering Mac OS X at all. > > Regards, > Nandini Hengen >

1 0

Fw: desktop database
by Entwicklung 17 Mar '02

17 Mar '02

Hello, I had sent the following email a couple of weeks back to some Apple employees who respond frequently to the hfs-user mailing list. But I didn't get any response from them. This is a general request to anyone on the list who cares to respond. In case it is not at all possible to get the data I need I would be grateful if someone from Apple could tell me that explicitly so that I could look for alternatives / continue with implementing other aspects. My previous email follows - Hi, I had written to the list a few days back asking for info. regarding the desktop DB since I was unable to find any specific links on the web and had heard that Apple doesn't want it openly documented for some reason. One person had written that Apple wouldn't provide users with the related info for proprietary reasons. But one other person wrote to me saying I could probably request Apple for any technical info. needed. Is this possible at all ? I remember that after one of our earlier discussions I had come to the conclusion that a DTDB would be necessary to improve the user-experience. But the question is .. where do I get info. as to the structure of these 'hidden' files in an HFS-image ? I'm beginning to think there's no light at the end of the tunnel..... :( Would be grateful for any info / links. Regards, Nandini Hengen

1 0

← Newer
1
...
4
5
6
7
8
9
10
...
19
Older →

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

1996

1995

hfs-user