[nu2c]

Hi All,
I am reading Linux programming interface. Now I am stuck with understanding the definition of signal function. Book says

"void ( *signal(int sig, void (*handler)(int)) ) (int);
Returns previous signal disposition on success, or SIG_ERR on error"
Usage :-
oldHandler = signal(SIGINT, newHandler);

with my understanding on function pointer, I am not able to understand how this function works...
Assuming, i remove the part of "(int sig, void (*handler)(int), my function will look like

void (*signal)(int)

which is a function pointer using one int argument and returns none. But what would function definition like this would mean

void (*signal())(int)

How it returns something?

Please help.

[nu2c]

I couldn't find any explanation for the query I raised before anywhere on the internet. Finally I looked in man pages and found that signal is defined as

typedef void (*sighandler_t)(int);
sighandler_t signal(int signum, sighandler_t handler);

This makes clear that singal function takes 2 arguments, and returns to a pointer a function which takes one argument and returns void.

thank you.