void
execute_file_commands (struct file *file)
{
const char *p;
/* Don't go through all the preparations if
the commands are nothing but whitespace. */
for (p = file->cmds->commands; *p != '\0'; ++p)
if (!isspace ((unsigned char)*p) && *p != '-' && *p != '@')
break;
if (*p == '\0')
{
/* If there are no commands, assume everything worked. */
set_command_state (file, cs_running);
file->update_status = us_success;
notice_finished_file (file);
return;
}
/* First set the automatic variables according to this file. */
initialize_file_variables (file, 0);
set_file_variables (file);
/* If this is a loaded dynamic object, unload it before remaking.
Some systems don't support overwriting a loaded object. */
if (file->loaded)
unload_file (file->name);
/* Start the commands running. */
new_job (file);
}
void
execute_file_commands (struct file *file)
{
const char *p;
/* Don't go through all the preparations if
the commands are nothing but whitespace. */
for (p = file->cmds->commands; *p != '\0'; ++p)
if (!isspace ((unsigned char)*p) && *p != '-' && *p != '@')
break;
if (*p == '\0')
{
/* If there are no commands, assume everything worked. */
set_command_state (file, cs_running);
file->update_status = 0;
notice_finished_file (file);
return;
}
/* First set the automatic variables according to this file. */
initialize_file_variables (file, 0);
set_file_variables (file);
/* Start the commands running. */
new_job (file);
}
void MiniLoop::AddToDelayedWorkQueue(PendingJob job)
{
assert(job.delay_run_ticks > 0);
PendingJob new_job(job);
job.seq_num = next_seq_num ++;
delayed_job_.push(job);
}
static flexsched_problem_t new_flexsched_problem(FILE *input, FILE *estimates) {
flexsched_problem_t flex_prob;
int i, j;
// initialize flex_problem
if (!(flex_prob = malloc(sizeof(struct flexsched_problem_s)))) {
fprintf(stderr,
"Insufficient memory to allocate flexsched problem structure!\n");
exit(1);
}
/* Parse instance file */
fscanf(input,"%d", &flex_prob->num_resources);
fscanf(input,"%d", &flex_prob->num_nodes);
fscanf(input,"%d", &flex_prob->num_jobs);
flex_prob->nodes = calloc(flex_prob->num_nodes, sizeof(node_t));
for (i = 0; i < flex_prob->num_nodes; i++) {
flex_prob->nodes[i] = new_node(flex_prob->num_resources);
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(input,"%lf", &(flex_prob->nodes[i]->unit_capacities[j]));
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(input,"%lf", &(flex_prob->nodes[i]->total_capacities[j]));
}
flex_prob->jobs = calloc(flex_prob->num_jobs, sizeof(job_t));
for (i = 0; i < flex_prob->num_jobs; i++) {
flex_prob->jobs[i] = new_job(flex_prob->num_resources);
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(input, "%lf",
&(flex_prob->jobs[i]->unit_rigid_requirements[j]));
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(input, "%lf", &(flex_prob->jobs[i]->actual_unit_fluid_needs[j]));
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(input, "%lf",
&(flex_prob->jobs[i]->total_rigid_requirements[j]));
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(input, "%lf", &(flex_prob->jobs[i]->actual_total_fluid_needs[j]));
if (estimates) {
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(estimates, "%lf", &(flex_prob->jobs[i]->unit_fluid_needs[j]));
for (j = 0; j < flex_prob->num_resources; j++)
fscanf(estimates, "%lf", &(flex_prob->jobs[i]->total_fluid_needs[j]));
} else {
for (j = 0; j < flex_prob->num_resources; j++) {
flex_prob->jobs[i]->unit_fluid_needs[j] =
flex_prob->jobs[i]->actual_unit_fluid_needs[j];
flex_prob->jobs[i]->total_fluid_needs[j] =
flex_prob->jobs[i]->actual_total_fluid_needs[j];
}
}
}
return flex_prob;
}
void
enqueue_job (command *ptr, unsigned int stopped)
{
job *tmp = new_job (ptr);
tmp->content->job = generate_job_number ();
tmp->content->stopped = stopped;
list_append ((sdlist **)&list, (sddata *)tmp);
if (stopped)
{
fprintf (stdout, "[%d] %d (%s) suspended\n",
tmp->content->job, ptr->pid, ptr->cmd);
}
else
fprintf (stdout, "[%d] %d (%s)\n",
tmp->content->job, ptr->pid, ptr->cmd);
}
static void dag_compile_par(struct dag * slf){
int use_semaphore = 0;
int size_semaphore = 0;
size_semaphore = atoi(global_get_str("-jobs"));
if( size_semaphore > 0 ){
use_semaphore = 1;
pkg_sem_init(size_semaphore);
}
if(slf->sorted){
int i, max = 0;
for(i = 0; slf->sorted[i]; i++){ max++; }
struct job ** jobs = calloc(max+1, sizeof(struct job *));
for(i = 0; i < max; i++){
jobs[i] = new_job();
if( use_semaphore ){
jobs[i]->fn = &pkg_compile_par_sem;
}else{
jobs[i]->fn = &pkg_compile_par;
}
jobs[i]->arg = (void *) slf->sorted[i];
}
jobs[max] = NULL;
int fail = spawn_jobs(i, jobs);
if(fail){
panic("parallel compile failed", __FILE__, __LINE__);
}
for(i = 0; jobs[i]; i++){
free(jobs[i]);
}
free(jobs);
}
if(use_semaphore){
pkg_sem_destroy();
}
};
int try_execute(String command, StringList arguments){
int c_pid;
//handlers dos controladores
struct sigaction sigchld;
struct sigaction ctrlc;
struct sigaction ctrlz;
sigchld.sa_flags = SA_SIGINFO;
sigchld.sa_sigaction = sigchld_hand;
ctrlc.sa_flags = SA_SIGINFO;
ctrlc.sa_sigaction = ctrlc_hand;
ctrlz.sa_flags = SA_SIGINFO;
ctrlz.sa_sigaction = ctrlz_hand;
c_pid = fork();
if (c_pid == 0) {
//processo filho
setpgid(0, 0);
execv(command, to_array(arguments));
} else {
/*processo pai
//tem controle sobre o sinal SIGCHLD, enviado pelo processo filho apos terminar sua execucao
controle dos sinais:
*/
sigaction(SIGCHLD, &sigchld, 0);
sigaction(SIGINT, &ctrlc, 0);
sigaction(SIGTSTP, &ctrlz, 0);
//adiciona na lista de jobs
job_list_push(job_list, new_job(copy_string(int_to_string(c_pid)), parse_proc_name(command)));
if(background == 1){
return 1;
}else{
wait(NULL);
}
}
return 1;
}
/* execute tree in child subprocess */
int
exchild(struct op *t, int flags, volatile int *xerrok,
int close_fd) /* used if XPCLOSE or XCCLOSE */
{
static Proc *last_proc; /* for pipelines */
int i;
sigset_t omask;
Proc *p;
Job *j;
int rv = 0;
int forksleep;
int ischild;
if (flags & XEXEC)
/* Clear XFORK|XPCLOSE|XCCLOSE|XCOPROC|XPIPEO|XPIPEI|XXCOM|XBGND
* (also done in another execute() below)
*/
return execute(t, flags & (XEXEC | XERROK), xerrok);
/* no SIGCHLD's while messing with job and process lists */
sigprocmask(SIG_BLOCK, &sm_sigchld, &omask);
p = new_proc();
p->next = (Proc *) 0;
p->state = PRUNNING;
p->status = 0;
p->pid = 0;
/* link process into jobs list */
if (flags&XPIPEI) { /* continuing with a pipe */
if (!last_job)
internal_errorf(1,
"exchild: XPIPEI and no last_job - pid %d",
(int) procpid);
j = last_job;
last_proc->next = p;
last_proc = p;
} else {
j = new_job(); /* fills in j->job */
/* we don't consider XXCOM's foreground since they don't get
* tty process group and we don't save or restore tty modes.
*/
j->flags = (flags & XXCOM) ? JF_XXCOM :
((flags & XBGND) ? 0 : (JF_FG|JF_USETTYMODE));
timerclear(&j->usrtime);
timerclear(&j->systime);
j->state = PRUNNING;
j->pgrp = 0;
j->ppid = procpid;
j->age = ++njobs;
j->proc_list = p;
j->coproc_id = 0;
last_job = j;
last_proc = p;
put_job(j, PJ_PAST_STOPPED);
}
snptreef(p->command, sizeof(p->command), "%T", t);
/* create child process */
forksleep = 1;
while ((i = fork()) < 0 && errno == EAGAIN && forksleep < 32) {
if (intrsig) /* allow user to ^C out... */
break;
sleep(forksleep);
forksleep <<= 1;
}
if (i < 0) {
kill_job(j, SIGKILL);
remove_job(j, "fork failed");
sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
errorf("cannot fork - try again");
}
ischild = i == 0;
if (ischild)
p->pid = procpid = getpid();
else
p->pid = i;
#ifdef JOBS
/* job control set up */
if (Flag(FMONITOR) && !(flags&XXCOM)) {
int dotty = 0;
if (j->pgrp == 0) { /* First process */
j->pgrp = p->pid;
dotty = 1;
}
/* set pgrp in both parent and child to deal with race
* condition
*/
setpgid(p->pid, j->pgrp);
/* YYY: should this be
if (ttypgrp_ok && ischild && !(flags&XBGND))
tcsetpgrp(tty_fd, j->pgrp);
instead? (see also YYY below)
*/
if (ttypgrp_ok && dotty && !(flags & XBGND))
tcsetpgrp(tty_fd, j->pgrp);
}
#endif /* JOBS */
/* used to close pipe input fd */
if (close_fd >= 0 && (((flags & XPCLOSE) && !ischild) ||
((flags & XCCLOSE) && ischild)))
close(close_fd);
if (ischild) { /* child */
/* Do this before restoring signal */
if (flags & XCOPROC)
coproc_cleanup(false);
sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
cleanup_parents_env();
#ifdef JOBS
/* If FMONITOR or FTALKING is set, these signals are ignored,
* if neither FMONITOR nor FTALKING are set, the signals have
* their inherited values.
*/
if (Flag(FMONITOR) && !(flags & XXCOM)) {
for (i = NELEM(tt_sigs); --i >= 0; )
setsig(&sigtraps[tt_sigs[i]], SIG_DFL,
SS_RESTORE_DFL|SS_FORCE);
}
#endif /* JOBS */
if (Flag(FBGNICE) && (flags & XBGND))
nice(4);
if ((flags & XBGND) && !Flag(FMONITOR)) {
setsig(&sigtraps[SIGINT], SIG_IGN,
SS_RESTORE_IGN|SS_FORCE);
setsig(&sigtraps[SIGQUIT], SIG_IGN,
SS_RESTORE_IGN|SS_FORCE);
if (!(flags & (XPIPEI | XCOPROC))) {
int fd = open("/dev/null", 0);
if (fd != 0) {
(void) ksh_dup2(fd, 0, true);
close(fd);
}
}
}
remove_job(j, "child"); /* in case of `jobs` command */
nzombie = 0;
#ifdef JOBS
ttypgrp_ok = 0;
Flag(FMONITOR) = 0;
#endif /* JOBS */
Flag(FTALKING) = 0;
tty_close();
cleartraps();
execute(t, (flags & XERROK) | XEXEC, NULL); /* no return */
internal_errorf(0, "exchild: execute() returned");
unwind(LLEAVE);
/* NOTREACHED */
}
/* shell (parent) stuff */
/* Ensure next child gets a (slightly) different $RANDOM sequence */
change_random();
if (!(flags & XPIPEO)) { /* last process in a job */
#ifdef JOBS
/* YYY: Is this needed? (see also YYY above)
if (Flag(FMONITOR) && !(flags&(XXCOM|XBGND)))
tcsetpgrp(tty_fd, j->pgrp);
*/
#endif /* JOBS */
j_startjob(j);
if (flags & XCOPROC) {
j->coproc_id = coproc.id;
coproc.njobs++; /* n jobs using co-process output */
coproc.job = (void *) j; /* j using co-process input */
}
if (flags & XBGND) {
j_set_async(j);
if (Flag(FTALKING)) {
shf_fprintf(shl_out, "[%d]", j->job);
for (p = j->proc_list; p; p = p->next)
shf_fprintf(shl_out, " %d", p->pid);
shf_putchar('\n', shl_out);
shf_flush(shl_out);
}
} else
rv = j_waitj(j, JW_NONE, "jw:last proc");
}
sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
return rv;
}
/*
int read_command_line(sh_string *command_line){
if(command_line == NULL)
return -1;
else if(command_line->buffer == NULL)
return -1;
else{
fgets(command_line->buffer, STRING_SIZE, stdin);
return 0;
}
}
*/
job* to_parse(char* in)
{
int isBackground = 0;
int flagIn = 0;
int flagOut = 0;
int i;
char* hasIn;
char* hasOut;
char* nameIn = NULL;
char* nameOut = NULL;
char** com;
char deli = '|';
char aux[2];
if(in[strlen(in) - 2] == '&')
{
isBackground = 1;
in[strlen(in) - 2] = '\0';
}
hasIn = strchr(in, '<');
hasOut = strchr(in, '>');
if(hasIn != NULL)
{
flagIn = 1;
}
if(hasOut != NULL)
{
flagOut = 1;
}
if(flagIn == 1)
{
nameIn = (char*) malloc (32 * sizeof(char));
if(flagOut == 1)
{
nameOut = (char*) malloc (32 * sizeof(char));
if(hasIn-in+1 > hasOut-in+1)
{
for(i = hasOut-in+2; i < hasIn-in; ++i)
{
if(in[i] != ' ')
{
aux[0] = in[i];
aux[1] = '\0';
strcat(nameOut, aux);
}
}
for(i = hasIn-in+2; i < strlen(in)-1; ++i)
{
if(in[i] != ' ')
{
aux[0] = in[i];
aux[1] = '\0';
strcat(nameIn, aux);
}
}
hasOut = strchr(in, '>');
in[hasOut-in-1] = '\0';
}
else
{
for(i = hasIn-in+2; i < hasOut-in; ++i)
{
if(in[i] != ' ')
{
aux[0] = in[i];
aux[1] = '\0';
strcat(nameIn, aux);
}
}
for(i = hasOut-in+2; i < strlen(in)-1; ++i)
{
if(in[i] != ' ')
{
aux[0] = in[i];
aux[1] = '\0';
strcat(nameOut, aux);
}
}
hasIn = strchr(in, '<');
in[hasIn-in-1] = '\0';
}
}
else
{
for(i = hasIn-in+2; i < strlen(in)-1; ++i)
{
if(in[i] != ' ')
{
aux[0] = in[i];
aux[1] = '\0';
strcat(nameIn, aux);
}
}
hasIn = strchr(in, '<');
in[hasIn-in-1] = '\0';
}
}
else
{
if(flagOut == 1)
{
nameOut = (char*) malloc (32 * sizeof(char));
for(i = hasOut-in+2; i < strlen(in)-1; ++i)
{
if(in[i] != ' ')
{
aux[0] = in[i];
aux[1] = '\0';
strcat(nameOut, aux);
}
}
hasOut = strchr(in, '>');
in[hasOut-in-1] = '\0';
}
}
com = VectorChar(in, &deli);
return (new_job(com, isBackground, nameIn, nameOut));
}
int
exchild(struct op *t, int flags,
int close_fd) /* used if XPCLOSE or XCCLOSE */
{
static Proc *last_proc; /* for pipelines */
int i;
sigset_t omask;
Proc *p;
Job *j;
int rv = 0;
int forksleep;
int ischild;
if (flags & XEXEC)
/* Clear XFORK|XPCLOSE|XCCLOSE|XCOPROC|XPIPEO|XPIPEI|XXCOM|XBGND
* (also done in another execute() below)
*/
return execute(t, flags & (XEXEC | XERROK));
p = new_proc();
p->next = (Proc *) 0;
p->state = PRUNNING;
p->status = 0;
p->pid = 0;
/* link process into jobs list */
if (flags&XPIPEI) { /* continuing with a pipe */
if (!last_job)
internal_errorf(1,
"exchild: XPIPEI and no last_job - pid %d",
(int) procpid);
j = last_job;
last_proc->next = p;
last_proc = p;
} else {
j = new_job(); /* fills in j->job */
/* we don't consider XXCOM's foreground since they don't get
* tty process group and we don't save or restore tty modes.
*/
j->flags = (flags & XXCOM) ? JF_XXCOM :
((flags & XBGND) ? 0 : (JF_FG|JF_USETTYMODE));
j->usrtime = j->systime = 0;
j->state = PRUNNING;
j->pgrp = 0;
j->ppid = procpid;
j->age = ++njobs;
j->proc_list = p;
j->coproc_id = 0;
last_job = j;
last_proc = p;
put_job(j, PJ_PAST_STOPPED);
}
snptreef(p->command, sizeof(p->command), "%T", t);
/* create child process */
forksleep = 1;
while ((i = fork()) < 0 && errno == EAGAIN && forksleep < 32) {
if (intrsig) /* allow user to ^C out... */
break;
sleep(forksleep);
forksleep <<= 1;
}
if (i < 0) {
kill_job(j, SIGKILL);
remove_job(j, "fork failed");
sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
errorf("cannot fork - try again");
}
ischild = i == 0;
if (ischild)
p->pid = procpid = getpid();
else
p->pid = i;
/* used to close pipe input fd */
if (close_fd >= 0 && (((flags & XPCLOSE) && !ischild) ||
((flags & XCCLOSE) && ischild)))
close(close_fd);
if (ischild) { /* child */
/* Do this before restoring signal */
if (flags & XCOPROC)
coproc_cleanup(false);
sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
cleanup_parents_env();
if ((flags & XBGND)) {
setsig(&sigtraps[SIGINT], SIG_IGN,
SS_RESTORE_IGN|SS_FORCE);
setsig(&sigtraps[SIGQUIT], SIG_IGN,
SS_RESTORE_IGN|SS_FORCE);
if (!(flags & (XPIPEI | XCOPROC))) {
int fd = open("/dev/null", 0);
if (fd != 0) {
(void) ksh_dup2(fd, 0, true);
close(fd);
}
}
}
remove_job(j, "child"); /* in case of `jobs` command */
nzombie = 0;
Flag(FTALKING) = 0;
tty_close();
cleartraps();
execute(t, (flags & XERROK) | XEXEC); /* no return */
internal_errorf(0, "exchild: execute() returned");
unwind(LLEAVE);
/* NOTREACHED */
}
/* shell (parent) stuff */
/* Ensure next child gets a (slightly) different $RANDOM sequence */
change_random();
if (!(flags & XPIPEO)) { /* last process in a job */
j_startjob(j);
if (flags & XCOPROC) {
j->coproc_id = coproc.id;
coproc.njobs++; /* n jobs using co-process output */
coproc.job = (void *) j; /* j using co-process input */
}
if (flags & XBGND) {
j_set_async(j);
if (Flag(FTALKING)) {
shf_fprintf(shl_out, "[%d]", j->job);
for (p = j->proc_list; p; p = p->next)
shf_fprintf(shl_out, " %d", p->pid);
shf_putchar('\n', shl_out);
shf_flush(shl_out);
}
} else
rv = j_waitj(j, JW_NONE, "jw:last proc");
}
sigprocmask(SIG_SETMASK, &omask, (sigset_t *) 0);
return rv;
}
int main(void) {
char inputBuffer[MAX_LINE]; /** buffer to hold the command entered **/
int background; /** equals 1 if a command is followed by '&' **/
int respawnable; /** igual a 1 si al comando le sigue '#' **/
char *args[MAX_LINE / 2]; /** command line (of 256) has max of 128 arguments **/
// probably useful variables:
int pid_fork, pid_wait; /** pid for created and waited process **/
int status; /** status returned by wait **/
enum status status_res; /** status processed by analyze_status() **/
int info; /** info processed by analyze_status() **/
ignore_terminal_signals(); /** Ignora las señales del terminal **/
/** Asociamos el manejador a la señal SIGCHLD y creamos la lista de trabajos **/
signal(SIGCHLD, manejador);
lista_trabajos = new_list("Lista trabajos");
/** Program terminates normally inside get_command() after ^D is typed **/
while(1) {
printf("\nCOMMAND->");
fflush(stdout);
/** get next command **/
get_command(inputBuffer, MAX_LINE, args, &background, &respawnable);
// if empty command
if(args[0] == NULL) {
continue;
}
/** Comando interno CD **/
if(strcmp(args[0], "cd") == 0 && args[1] != NULL) {
chdir(args[1]);
continue;
}
/** Comando interno historial **/
if(strcmp(args[0], "historial") == 0) {
continue;
}
/** Comando interno JOBS (HECHO) **/
if(strcmp(args[0], "jobs") == 0) {
if(empty_list(lista_trabajos)) {
printf("La lista de tareas está vacía\n");
} else {
print_job_list(lista_trabajos);
}
continue;
}
/** Comando interno BG (HECHO) **/
if(strcmp(args[0], "bg") == 0) {
if(args[1] == NULL) {
printf("No le has pasado ningún argumento al comando \n");
} else {
int index = atoi(args[1]); // Convertimos el indice pasado a un entero
bgCommand(index); // Invocamos al comando FG
}
continue;
}
/** Comando interno FG (HECHO) **/
if(strcmp(args[0], "fg") == 0) {
int index = 1; // Por defecto a la primera tarea de la lista
if(args[1] != NULL) {
index = atoi(args[1]); // Si no es nulo, lo aplicaremos al correspondiente
}
fgCommand(index); // Invocamos al comando FG
continue;
}
// the steps are:
// (1) fork a child process using fork()
pid_fork = fork();
if(pid_fork < 0) { // Caso de error
printf("Error. The system wasn able to spawn a new process. Exiting...\n");
exit(-1);
} else if(pid_fork == 0) { // Proceso hijo
/** Nuevo identificador de grupo de procesos para el hijo, asociacion del terminal y señales a default **/
pid_t mypid = getpid();
new_process_group(mypid); // Metemos al hijo en un nuevo grupo
if(!background && !respawnable) {
// Le asignamos el terminal
set_terminal(mypid);
}
// Restauramos las señales que reciben del terminal
restore_terminal_signals();
// (2) the child process will invoke execvp()
execvp(args[0], args);
// Solo llegará aquí si no se ha producido el cambio de imagen
printf("Error. Command not found: %s\n", args[0]);
exit(-1);
// Padre
} else {
/** Nuevo identificador de grupo de procesos para el hijo **/
new_process_group(pid_fork); // El padre se va a un nuevo grupo de trabajo
/** Si el programa está en background o es respawnable **/
if(background || respawnable) {
/** BLoqueamos la señal SIGCHLD, añadimos el trabajo a la lista(background) y desbloqueamos la señal **/
block_SIGCHLD();
job *aux;
// Creamos un nuevo nodo para agregarlo a la lista
if(background) {
aux = new_job(pid_fork, args[0], args, BACKGROUND);
} else if(respawnable) {
aux = new_job(pid_fork, args[0], args, RESPAWNABLE);
}
// Añadimos ese nodo a la lista creada anteriormente
add_job(lista_trabajos, aux);
unblock_SIGCHLD();
printf("Background job running... pid: %d, command: %s. \n", pid_fork, args[0]);
/** Si no, es por que está en foreground **/
} else {
/**
* Wait con detección de suspension y recuperación del terminal
* Con el WUNTRACED se comprueba también si el hijo se suspende
**/
set_terminal(pid_fork); // Redundante
pid_t wait_pid = waitpid(pid_fork, &status, WUNTRACED);
set_terminal(getpid());
/**
* pid_fork = waitpid(pid_fork, &status, 0);
* esta instruccion ya no es necesaria porque hacemos el wait_pid
**/
int info;
// Le pasamos la variable "status" que nos acaba de pasar el wait
enum status st = analyze_status(status, &info);
/**
* Si sale del bloqueo debido a la suspensión del estado
* lo metemos en la lista de tareas para poder llevar un
* seguimiento de los procesos suspendidos
**/
if(st == SUSPENDED) {
/** BLoqueamos la señal SIGCHLD, añadimos el trabajo a la lista (suspendido) y desbloqueamos la señal **/
block_SIGCHLD();
// Creamos un nuevo nodo para agregarlo a la lista
job *aux = new_job(pid_fork, args[0], args, STOPPED);
// Añadimos ese nodo a la lista creada anteriormente
add_job(lista_trabajos, aux);
unblock_SIGCHLD();
}
// (4) Shell shows a status message for processed command
printf("Foreground pid: %d, command: %s, status: %s, info: %d. \n", wait_pid, args[0], status_strings[st], info);
}
}
// (5) loop returns to get_commnad() function
} // end while
}