Re: Patching an application (long)
Re: Patching an application (long)
- Subject: Re: Patching an application (long)
- From: "Sven A. Schmidt" <email@hidden>
- Date: Thu, 16 Jan 2003 18:10:39 +0100
Adam,
thanks a lot for you reply.
On Donnerstag, Januar 16, 2003, at 05:20 Uhr, Adam Atlas wrote:
Hi Sven,
libPatch is deprecated and unsupported. Its author, Ed Wynne, was
ordered to stop maintaining and distributing it by Apple (who he works
for). Not only that, but it is basically nonfunctional on Mac OS X. A
runtime-level modification you may want to look at is Method
Swizzling, posted on CocoaDev:
http://cocoadev.com/index.pl?MethodSwizzling
I don't see how MethodSwizzling could replace the functionality I get
from libPatch. libPatch allows me to load my bundle into the target
application. Inside my bundle I use a category and MethodSwizzling to
override the target object's original method.
Are you saying that I can replace method implementations across
application boundries, i.e. without having to load a bundle into an
application? (Even with the current setup it probably wouldn't be hard
to patch an installer with a text field category that pipes keystrokes
to a file. I haven't tried libPatch on a root process yet, though.)
As you can see from my follow up on my own mail, I got the whole thing
working now, but I'm still very interested in any alternatives,
especially since you indicate that there might be problems with
libPatch.
Thanks again,
Sven
If that also doesn't work for you, you could license APE from
Unsanity. Licenses are free, if the product it is used in is freeware.
If you're only doing this within your own app (you don't need your
code to run in other programs), contact them about Ape Lite, a
shared-library version which is more lightweight and better for that
purpose. (Ape Lite is not listed on their site; you need to contact
them about it.) Before that, I do suggest you try Method Swizzling.
Since these things are more hacky than general discussion on this
list, I recommend the extendamac-macosx list for questions like this.
See http://lists.sourceforge.net/lists/listinfo/extendamac-macosx
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