do threads in the process share the signal handler？

Hi
I am studying the Advanced Programming in the Unix Environment these days. When I come to the chapter of Threads and signals, I find it difficult for me to understand the statement that the signal disposition is shared by all threads in the process.

Dose it mean that threads in the same process share the signal handler or just the attributes that set by sigaction ?



I will appreciate your helping me.

Signals is multithreaded program are generally complicated. And yes, they're shared. And you don't know in which one it will be handled. What you can do is to block signals from being handled in some (or all except one) of your threads.