I have a c++ program that handles several signals to perform different actions, using signal:    signal(SIGHUP, signal_handler);I wanted to extend this signal handling to allow me to send different action requests to my program, and found that using sigaction I would be able to receive extra information along with the signal:    sigaction(SIGUSR1, &act, 0);For what I could find, I am able to send this type of signals from other programs, setting extra information on the sigval object, so that I know, on the receiving end, what the program was requested to do.What I wanted to know is how can I send this type of signal information through a shell script on bash. Is it possible? I can send signals to my program using kill -S SIGHUP [PID] but I do not find a way to send that extra parameter using kill, so I was wondering if bash has any command that emulates the sigaction / sigqueue behaviour, allowing me to send signals to my app without having to develop another application to do the job.
Sending sigaction / sigqueue through shell
shell;signals
Your information seems to be outdated. From my sigaction man page:Undocumented.        Before the introduction of SA_SIGINFO it was also possible to get  some        additional  information, namely by using a sa_handler with second argu-        ment of type struct sigcontext. This use is obsolete now.