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Re: [OT] How to extract a BOM archive correctly?
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Re: [OT] How to extract a BOM archive correctly?


  • Subject: Re: [OT] How to extract a BOM archive correctly?
  • From: Eduard de Jong <email@hidden>
  • Date: Sat, 6 Oct 2007 22:49:49 +0100

You are right, the man pages are very thin on actual data on the format of the file.

The way to make a bom file, which they suggest is to create a directory structure with all names, owner id, group id and acsess bits set and then feed that into mkbom. As i understand it, none of these files need to be present with actual data to make a bom.

One aproach could be to use a shell script to parse the output of lsbom to reconstruct the file system is specifies with empty files, apply your modifications to the result and then get a modified bom with mkbom.


At 01:54 +0100 06-10-2007, Finlay Dobbie wrote:
On 05/10/2007, Karan, Cem (Civ, ARL/CISD) <email@hidden> wrote:
 I've read the man pages before, but they aren't specifications; that is,
 if I write a tool that is designed to parse a BOM file, I need to know
 what the different bytes are that it sees.  I can reverse engineer this,
 but that can lead to errors that I would prefer to avoid.  The man pages
 for bom, lsbom, and mkbom (at least on my machine, a fairly stock
 10.4.10 machine) don't give enough information on this for me to write a
 tool.  Basically, I'm looking for a spec like you'd find if you were
 trying to create a new jpeg library; you need more than what help files
 for your favorite jpeg viewer provide.  In the same way, I need more
 than what the man/info pages provide.

There is no such specification, it is a private file format. You could always just parse the output of lsbom, which will give you what you need.

-- Finlay


--
Eduard
 	"E por se movo"
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  • Follow-Ups:
    • RE: [OT] How to extract a BOM archive correctly?
      • From: "Karan, Cem (Civ, ARL/CISD)" <email@hidden>
References: 
 >Re: [OT] How to extract a BOM archive correctly? (From: "Karan, Cem (Civ, ARL/CISD)" <email@hidden>)
 >Re: [OT] How to extract a BOM archive correctly? (From: Fritz Anderson <email@hidden>)
 >RE: [OT] How to extract a BOM archive correctly? (From: "Karan, Cem (Civ, ARL/CISD)" <email@hidden>)
 >RE: [OT] How to extract a BOM archive correctly? (From: "Karan, Cem (Civ, ARL/CISD)" <email@hidden>)
 >Re: [OT] How to extract a BOM archive correctly? (From: "Finlay Dobbie" <email@hidden>)

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