using filedescriptors in SIGINT signal handler

[Bram Stolk]

Hello,

I catch SIGINT signals with a handler.
In the handler, I use fd's to write some data to a child process.

Is this valid?
Because the data never arrives, and I wonder what I'm doing wrong.

Can filedescriptors still be used when you're in the signal
handling of SIGINT?

Thanks,

   Bram