[os] sleep emulated via alarm + pause - makefile

[xgiovio]

main

/*
 *
 *
 *  Sample Function
 *
 */

#include <st***.h>
#include "main_header.h"

int main ( void ) {
    
    for(;-1;){
        
        fprintf(stdout,"Dormo per 2 sec ...\n");
        xsleep(2);
        fprintf(stdout,"Eccomi. Dormo per altri 2 sec ...\n");
        
    }
    
    return 0;
} 

main_header

void xsleep ( int n); 

xsleep

#include <unistd.h>
#include <st***.h>
#include <signal.h>


void xsleep_action ( int signal ){}


void xsleep ( int n ) {
    
    
    struct sigaction sigalrm_action;
        sigalrm_action.sa_handler = xsleep_action;
        sigalrm_action.sa_flags= 0;
    
    sigaction(SIGALRM,&sigalrm_action,NULL);
    
    alarm(n);
    pause();
    
} 

makefile

all:main.o xsleep.o
    gcc -o exec main.o xsleep.o
main.o:main.c main_header.h
    gcc -c -o main.o main.c
xsleep.o:xsleep.c
    gcc -c -o xsleep.o xsleep.c