To find if a binary is being used/running
Hi, I need to know if a binary is executing or not. I just have the path to the binary e.g. /Applications/MyApp.app/Contents/MacOS/MyApp There's NSRunningApplication method runningApplicationsWithBundleIdentifier: , but I have other binaries which are embedded in this app which don't have a bundle id. And I want to know if they are running or not. Cocoa doesn't seem have any such specific API for this purpose. NSFileHandle provides a valid handle (for writing) even if the binary is executing. Is there any method like open() or something which would fail if binary is executing. Tried open() with flags O_EXLOCK but no luck yet. Is this even possible? Best, Nick ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: To find if a binary is being used/running
On Oct 4, 2013, at 12:08 AM, Nick Rogers roger...@mac.com wrote: Hi, I need to know if a binary is executing or not. I just have the path to the binary e.g. /Applications/MyApp.app/Contents/MacOS/MyApp From the OS’s point of view, your question is ill-formed. The user can create a hardlink to the same inode at /tmp/someapp and execute that. Is this even possible? I can think of a couple strategies: 1. Have the target app create a resource that goes away when the app terminates. Maybe a pipe? Something that the system will destroy when the helper app terminates. 2. Move your helper apps to XPC services. (Almost certainly Apple’s preferred approach.) --Kyle Sluder ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
Re: To find if a binary is being used/running
On Oct 4, 2013, at 12:08 AM, Nick Rogers roger...@mac.com wrote: Is this even possible? Basically no. In Unix there is no connection from an executable file to a process running that file (or from _any_ file to a process that has that file open, really.) The most exhaustive solution is what the `lsof` and `ps` tools do, basically iterating over the kernel’s list of open files and running processes and looking for a match, which is expensive. Unix tools often seem to use a strategy of creating a ‘pid’ file at some known location, which contains the process ID of the running instance of the tool. The tool has to write the file when it starts up, and be careful to delete it whenever it exits (including if it crashes or is killed.) But I agree with Kyle, you should be using XPC or something similar to manage helper tasks. —Jens ___ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
