Launching an app from Carbon app (newbie question)
Launching an app from Carbon app (newbie question)
- Subject: Launching an app from Carbon app (newbie question)
- From: "apple" <email@hidden>
- Date: Sun, 16 Oct 2005 17:00:52 -0700
I am in the process of porting an application from windows to Carbon. I have most of it working, but the original app would connect to a server, check to see if an update was available, if so, it would update itself. It updated itself by copying the application to a temporary directory, running the temporary copy, quitting the original one, then download the new app, save it in place of the original, call the updated app in a new process, and quit itself. When it is doing these executions of itself, it passes information between the various instances of itself by command line parameter. The original app used the windows CreateProcess execute the various instances of itself. I am trying to duplicate this behavior now (the application has to exist on both platforms, so I am basically trying to create a copy of the windows CreateProcess call). I coded it originally using the system( ) call, passing in the command line I needed followed by the & to make system return right!
away. If I verify each of these steps individually through the debugger's command line parameters, it seems to work, and if I run the application, it seems to update itself succesfully, but then quits in the middle of doing something. My guess is that the when the original process terminates, all the subsequent calls starting different process using system are killed, and so I can't complete the update. I tried using execve, but I always get a ENOTSUP returned from that, and can't figure out why. I looked into using Carbon's LaunchApplication call, but I don't see any way I can pass in command line parameters. Does anyone here have any suggestions as to what I could do to get this working?
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