Notes

/**
* @file main.c
* @brief Description
* @date 2016-11-08
* @author Pedro Figueiredo -2140260
*/

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <assert.h>
#include <pthread.h>

#include "debug.h"
#include "memory.h"
#include "args.h"
//Socket libraries
#include <sys/socket.h>
//Address libraries
#include <arpa/inet.h>

//Error handling
#define C_ERRO_PTHREAD_CREATE 1
#define C_ERRO_PTHREAD_JOIN 2
#define C_ERRO_PARAM 3
#define ERR_ARGS 4
#define ERR_SYS_CALL 5

#define LOCK(m) (assert(pthread_mutex_lock(m) == 0))
#define UNLOCK(m) (assert(pthread_mutex_unlock(m) == 0))
#define WAIT(c,m) (assert(pthread_cond_wait(c,m) == 0))
#define SIGNAL(c) (assert(pthread_cond_signal(c) == 0))
#define BROADCAST(c) (assert(pthread_cond_broadcast(c) == 0))
//Prototypes
//prototipo
void handler(int signal,siginfo_t *siginfo,void *context);
void *task(void *arg);

volatile int stop = 0;



int main(int argc, char *argv[]){
/* Disable warnings */
(void)argc; (void)argv;

int contador1=0;
int contador2=0;




// Signal handling SIGUSR1 e SIGINT
struct sigaction sa;
sa.sa_sigaction = handler;
sa.sa_flags = 0;
sa.sa_flags |= SA_SIGINFO;
sa.sa_flags |= SA_RESTART; /*recupera chamadas bloqueantes*/
sigemptyset(&sa.sa_mask);

if (sigaction(SIGUSR1, &sa, NULL) != 0) {
ERROR(ERR_SYS_CALL, "sigaction() failed");
}
if (sigaction(SIGUSR2, &sa, NULL) != 0) {
ERROR(ERR_SYS_CALL, "sigaction() failed");
}
if (sigaction(SIGQUIT, &sa, NULL) != 0) {
ERROR(ERR_SYS_CALL, "sigaction() failed");

}


printf("[INFO] PID=%d - waiting for SIGUSR1 or SIGUSR2 or SIGQUIT (finish)n", getpid());
printf("[INFO] use: kill -s SIGUSR1 %d OR kill -s %dn", getpid(), getpid() );

while (1) {
pause(); //pause waiting for signal

if (stop == 1)
{
contador1++;

pthread_t tid;
// cria uma thread + passagem de parâmetro
if ((errno = pthread_create(&tid, NULL, task, NULL) != 0))
ERROR(10, "Erro no pthread_create()!");

// espera que a thread termine
if ((errno = pthread_join(tid, NULL)) != 0)
ERROR(11, "Erro no pthread_join()!n");

}
//stuff
if (stop == 2)
{
contador2++;

pid_t pid;
pid=fork();

if (pid==0){

printf("O meu PID é: [%d]n",getpid());

//tamanho do ficheiro
FILE *fp;
fp = fopen("prog","r");
fseek(fp, 0L, SEEK_END);
int sz = ftell(fp);

printf("%d bytesn",sz);

fclose(fp);

exit(0);

}else if (pid>0) {



}else{
ERROR(1, "Erro na execucao do fork()");
}



}
if (stop == 3)
{
printf("SIGUSR1: %d receivedn",contador1);
printf("SIGUSR2: %d receivedn",contador2);
exit(0);
}


}


return 0;
}



//signal handler function
void handler(int signal,siginfo_t *siginfo,void *context)
{
(void)context;

if (signal == SIGUSR1) {
stop = 1;
}
if (signal == SIGUSR2) {
stop = 2;
}
if (signal == SIGQUIT) {

stop = 3;


printf("Detalhes:n");
printf("tPID: %ldntUID:%ldn", (long)siginfo->si_pid,
(long)siginfo->si_uid);



}
}





void *task(void *arg)
{

(void) arg;

time_t curtime;
time(&curtime);

printf("Current time = %s", ctime(&curtime));


pthread_exit(NULL);

return NULL;
}