#
# SCons Reliable signals test
#
# Version 1.0
# 24-Aug-2009
#

def checkReliableSignals(conf):
    """Returns true if signal handlers reinstalls themself"""
    conf.Message("Checking for reliable signals... ")
    rc,result = conf.TryRun('''
#include <stdio.h>    
#include <signal.h>
#include <unistd.h>
#include <stdlib.h>    
volatile int test;
void sig_handler(int sg)
{ 
    test=1;
}
int main()
{
    signal(SIGUSR1,sig_handler);
    test=0;
    kill(getpid(),SIGUSR1);
    sleep(1);
    if(test==0) {
        printf("Signals ARE BROKEN!\\n");
        kill(0,SIGQUIT);
    }
    test=0;
    kill(getpid(),SIGUSR1);
    if(test==1)
        exit(0);
    else
        exit(1);
}
''','.c')
    conf.Result(rc)
    return rc