ule/signal-handler.h

#ifndef SIGNAL_HANDLER_H
#define SIGNAL_HANDLER_H

#include <signal.h> // for signal() and the SIG macros

#include "types.h"
#include "print.h"


// the running process can receive and respond to a variety of platform-dependent 'signals' during runtime from the OS.
// freebsd has something like 30 signals, windows has a subset, just 6. we'll just deal with 6.
static inline void defaultHandler(s32 signal) {
    TYPES_H_FTAG; 
    switch (signal) {
        case SIGSEGV:
        case SIGABRT:
            print("%serror%s: %d\n", ANSI_RED, ANSI_RESET, signal);
            trace();

        case SIGINT:
            die("Bye! (SIGINT)\n");

        case SIGTERM:
            die(" We were asked to stop (SIGTERM).\n");

        case SIGFPE:
            die(" (SIGFPE).\n");

        case SIGILL:
            die(" (SIGILL).\n");

        default:
            die(" unknown/non-standard signal raised: %d\n", signal);
            break;
    }
}

static void setSignalHandlers(void(*handler)(s32 signal) = defaultHandler) {
    TYPES_H_FTAG; 
    if (signal(SIGSEGV, handler) == SIG_ERR) die("failed to set SIGSEGV handler... zzz...\n");
    if (signal(SIGABRT, handler) == SIG_ERR) die("failed to set SIGABRT handler... zzz...\n");
    if (signal(SIGFPE,  handler) == SIG_ERR) die("failed to set SIGFPE handler... zzz...\n");
    if (signal(SIGILL,  handler) == SIG_ERR) die("failed to set SIGILL handler... zzz...\n"); // does this fire on using sprintf (on Catalina)?
    if (signal(SIGINT,  handler) == SIG_ERR) die("failed to set SIGINT handler... zzz...\n");
    if (signal(SIGTERM, handler) == SIG_ERR) die("failed to set SIGTERM handler... zzz...\n");
}

#endif