问题
I am writing a simple program in which parent and child process are alternatively printing into a file. I have managed to do this using user defined signals. Now I want to handle the SIGINT signal. Once ctrl-c is received the parent must send termination signal to child,the child should then should terminate and finally the parent should terminate.
My question is, in order to make this work properly I must catch the SIGINT signal ONLY from parent and IGNORE it from child. Is it right? If yes any hints on doing this?
回答1:
Call:
signal(SIGINT, SIG_IGN);
from the child process which will make the child process ignore the SIGINT signal. From man signal:
If the disposition is set to SIG_IGN, then the signal is ignored.
来源：https://stackoverflow.com/questions/12953350/ignore-sigint-signal-in-child-process