NSTask setStandardInput screws up notifications
NSTask setStandardInput screws up notifications
- Subject: NSTask setStandardInput screws up notifications
- From: Ron Wagner <email@hidden>
- Date: Wed, 2 Jul 2003 14:32:25 -0400
Hello list,
I am using NSTask in a Cocoa app and calling setStandardInput and
setStandardOutput to send data back and forth to the tool that I am
launching. The tool works fine when invoked from Terminal, but from the
Cocoa app my NSFileHandleReadCompletionNotification method stops
working when I call setStandardOutput. In other words, if I comment out
the call to setStandardOutput the notification works when the tool
sends data to stdout. As soon as I uncomment it out, no more
notification.
Here is the NSTask setup code. Any ideas would be appreciated.
Thanks,
Ron Wagner
[_spoolerTask setStandardOutput: [NSPipe pipe]];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(taskDataAvailable:)
name: NSFileHandleReadCompletionNotification
object: [[_spoolerTask standardOutput] fileHandleForReading]];
[[[_spoolerTask standardOutput] fileHandleForReading]
readInBackgroundAndNotify];
[_spoolerTask setStandardError: [NSPipe pipe]];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(errorDataAvailable:)
name: NSFileHandleReadCompletionNotification
object: [[_spoolerTask standardError] fileHandleForReading]];
[[[_spoolerTask standardError] fileHandleForReading]
readInBackgroundAndNotify];
_inputPipe = [NSPipe pipe];
_taskInput = [_inputPipe fileHandleForWriting];
// following line uncommented stops read notification
// [_spoolerTask setStandardInput: _inputPipe];
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