On Mar 28, 2010, at 12:06 PM, John Pannell wrote: > Hi James- > > Depending on your use case, you might be able to shut the buffering off by > something like this... > > setvbuf(stdout, NULL, _IONBF, 0);
That would go in the command line tool, not in the client app, right? As I mentioned, I don't have source code for the tool. > On Mar 28, 2010, at 12:56 PM, James W. Walker wrote: > >> I've been running NSTask and reading the output using -[NSFileHandle >> readInBackgroundAndNotify], but in certain situations there was a problem: >> Due to the block buffering of standard output, I wasn't getting notified as >> soon as some output had been produced. I don't have control over the code >> being run by NSTask. Some googling led me to believe that I need to use a >> pseudo tty instead of NSPipe to communicate with the NSTask. So, I called >> openpty, wrapped the file descriptors in NSFileHandles, set the slave handle >> as standard output of the NSTask, and called [masterHandle >> readInBackgroundAndNotify]. This almost worked. The problem is that I >> can't tell when the output is done. When I was using NSPipe, my >> NSFileHandleReadCompletionNotification observer method would get an NSData >> of length 0, which told me that there was no more data. Now, that doesn't >> happen. I tried observing NSTaskDidTerminateNotification, but that >> notification arrives before I've received all the data. Attempting to read >> more data with -[NSFileHandle availableData] just hangs. >> >> Can anyone lead me out of this mire? >> >> _______________________________________________ >> >> 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: >> http://lists.apple.com/mailman/options/cocoa-dev/john%40positivespinmedia.com >> >> This email sent to j...@positivespinmedia.com > _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
