Re: Query about Zip command
Re: Query about Zip command
- Subject: Re: Query about Zip command
- From: "parag vibhute" <email@hidden>
- Date: Fri, 23 May 2008 14:31:01 +0530
I was looking for this answer only. Thanks a lot.
Palav
On Fri, May 23, 2008 at 2:23 PM, Andrew Farmer <email@hidden> wrote:
> On 23 May 08, at 01:26, parag vibhute wrote:
>
>> I am developing cocoa application & using NSApplescript class to do shell
>> scripting which involves zip command. I am using zip command for zipping
>> the
>> files because there is no framework api available for it. Even though libz
>> is available, it is not easy to use. (I can't use NSData because I am
>> using
>> output zip file for distribution as an alternate to pkg). My query is "Is
>> it
>> possible that any Mac system will not have zip command?" because if there
>> is
>> then my code will fail. I went through docs & came to know that Finder
>> uses
>> its own code for archiving the files.
>>
>
> Two answers:
>
> 1. The zip binary is a required component on 10.4 and above. It was
> optional but installed by default on 10.3, and was not installed by default
> on 10.2 and earlier. Statistics from Adium and the Omni Group both suggest
> that anything before 10.3 is basically nonexistent in the wild, so you're
> safe assuming it's there.
>
> 2. While libz may get you part of the way to reading PKZip archives, it
> only implements the deflate compression algorithm - it won't read the
> directory components of the archive for you. So don't expect it to do all
> the work for you.
>
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