how to send signal from one program to another?

Question

i am using message queue as an ipc between 2 programs. Now i want to send data from one program to another using message queue and then intimate it through a signal SIGINT.

I dont know how to send a signal from one program to another . Can anybody pls provide a sample code if they have the solution.

Answer 1

#include <sys/types.h>
#include <signal.h>
int kill(pid_t pid, int sig);

Answer 2

Signal in linux can be send using kill system call just check this link for documentation of kill system call and example. you can see man -2 kill also. and it's not advisable to use SIGINT use SIGUSR1 or SIGUSR2