Signal queuing in C

Question

I have a simple program under Linux which sends SIGUSR1 signal to its child process in a cycle. But when I send e.g. 10 signals, sometimes happens, that the child received o

Answer 1

Your problem is probably that SIGUSR2 is a signal that is delivered right away, while other signals are blocked or queued (in status pending).

Here's how you can check for pending signals: http://www.gnu.org/s/libc/manual/html_node/Checking-for-Pending-Signals.html