Re: Is a file open in another application?
Re: Is a file open in another application?
- Subject: Re: Is a file open in another application?
- From: Charles Srstka <email@hidden>
- Date: Sat, 19 Mar 2011 17:20:18 -0500
On Mar 19, 2011, at 1:40 PM, Conrad Shultz wrote:
> On 3/19/11 11:10 AM, Kyle Sluder wrote:
>> On Sat, Mar 19, 2011 at 9:13 AM, Conrad Shultz
>> <email@hidden> wrote:
>>> Note that this will only capture files that are properly opened (i.e.
>>> fopen()'d), so you won't catch every apparently open file. For example,
>>> if you open a file in vi(m), it creates a hidden scratch file in the
>>> same directory and closes the original file. You then edit the scratch
>>> file, which is only written out to the original file on save. In this
>>> way, the original file is protected from damage due to a crash, but lsof
>>> will almost never show it as being open.
>>
>> This is also how Cocoa apps work. They only keep the file open to read
>> its contents.
>>
>> I'm afraid that what Brad wants to do is not possible yet.
>
> Are you certain that is a general behavior?
Just looking at NSDocument’s default hooks for opening/saving files will show you the answer to that. The ones the user is encouraged to use in the general case read the file into an NSData object on open, and write an NSData out to the file on save.
Charles_______________________________________________
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