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Question

Can you redirect log output of Xcode console to Terminal when running iPhone Simulator?

Answer 1

+1 A:

Couldn't say how it'd work in the simulator, but redirecting stdout is not terribly difficult. Say you wanted to pipe it into your own view:

#include <unistd.h>

stderr->_write = RedirectOutputToView;
stdout->_write = RedirectOutputToView;

And use the prototype:

int RedirectOutputToView(void *inFD, const char *buffer, int size);

Azeem.Butt 2009-12-15 20:50:36

I know how to redirect stdout. I just need to know how to get an iPhone app running in debug mode in XCode to output to stdout of the Terminal.

dan 2009-12-15 21:12:51

Thanks, but there must be a simpler way to do this. For example, if there was a way (which I don't know about) to launch the iPhone app in the iPhoneSimulator directly from the Terminal, then presumably the logging output would appear in the Terminal window you launched the app from.

dan 2009-12-15 21:30:34

So redirect it to a file and run tail -f on that. If Terminal has a stdout, you don't get to write to it from outside its address space.

Azeem.Butt 2009-12-15 21:57:50

If XCode wrote its console log output to a file somewhere, it would be great to know so we could tail -f that directly.

dan 2009-12-15 22:23:04

Aha, I got it working. The solution was something like NSString *logPath = @"/path/to/log/file.log";freopen([logPath fileSystemRepresentation], "a", stderr);in the main() function

dan 2009-12-15 22:39:34

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Can you redirect log output of Xcode console to Terminal when running iPhone Simulator?

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