C语言 忽略子进程中的 SIGINT 信号
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Ignore SIGINT signal in child process
提问by SpyrosR
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 SIGINTsignal. Once ctrl-cis received the parent must send termination signal to child,the child should then should terminate and finally the parent should terminate.
我正在编写一个简单的程序，其中父进程和子进程交替打印到文件中。我已经设法使用用户定义的信号来做到这一点。现在我想处理SIGINT信号。一旦ctrl-c收到，父级必须向子级发送终止信号，子级应该终止，最后父级终止。
My question is, in order to make this work properly I must catch the SIGINTsignal ONLY from parent and IGNORE it from child. Is it right? If yes any hints on doing this?
我的问题是，为了使这项工作正常进行，我必须SIGINT仅从父母那里捕捉信号，而从孩子那里忽略它。这样对吗？如果是的话，有什么关于这样做的提示吗？
回答by hmjd
Call:
称呼：
signal(SIGINT, SIG_IGN);
from the child process which will make the child process ignore the SIGINTsignal. From man signal:
来自子进程这将使子进程忽略SIGINT信号。从人信号：
If the disposition is set to SIG_IGN, then the signal is ignored.
如果处置设置为 SIG_IGN，则忽略该信号。
