Signal handling in Linux

pradeep_zenith · 02-01-2010, 09:51 AM

Hi guys,
I know the basic concepts of signals and signal handling. Now, suppose, I register a handler for signal by using sigaction api, So who calls the signal handler? is it Kernel? If it is so, then does the signal handler execute in kernel context? And if I make any blocking call (say read) in handler, does it means that the kernel will be blocked?

Thanks,
Pradeep

carbonfiber · 02-01-2010, 10:01 AM

(simplified) The process that has registered the signal handler will execute it when it (the process) receives the respective signal.