/* ____ SOSTIUIRE QUESTO PROGRAMMA __ */
int main(int argc, char* argv[])
{
pid_t pid;
int fd;
get_info("CALLING PROCESS", 0);
fd = open("/dev/tty", O_RDWR);
printf("PGID leader: %ld\n", (long)tcgetpgrp(fd));
printf("PGID foreground: %ld\n", (long)tcgetsid(0));
switch (pid = fork()) {
case -1:
fprintf(stderr, "Err.(%s) fork() failed\n", strerror(errno));
exit(EXIT_FAILURE);
case 0:
/* Il processo figlio crea una nuova sessione, pertanto PGID e
SID sono settati al PID del figlio medesimo */
setsid();
get_info("CHILD PROCESS", pid);
exit(EXIT_SUCCESS);
default:
waitpid(pid, NULL, 0);
}
return (EXIT_SUCCESS);
}
int
tcsetpgrp(int fd, pid_t pgrp)
{
if (tcgetsid(fd) < 0)
return (-1);
return (ioctl(fd, TIOCSPGRP, &pgrp));
}
void testValues() {
f = 2;
int result;
result = tcgetsid(anyint());
//@ assert f == 2;
//@ assert vacuous: \false;
}
int
main ()
{
int master;
int slave;
/* Open a pseudo-terminal, as a master-slave pair. */
{
int res = openpty (&master, &slave, NULL, NULL, NULL);
if (res != 0)
{
fprintf (stderr, "openpty returned %d\n", res);
return 1;
}
}
/* Create a new session and make it the controlling tty of this session. */
{
int res = login_tty (slave);
if (res < 0)
{
fprintf (stderr, "login_tty failed\n");
return 1;
}
}
/* From here on, we cannot use stderr for error messages any more.
If a test fails, just abort. */
/* Check that fd = 0, 1, 2 are now open to the controlling terminal for the
current process and that it is a session of its own. */
{
int fd;
for (fd = 0; fd < 3; fd++)
if (!(tcgetpgrp (fd) == getpid ()))
abort ();
for (fd = 0; fd < 3; fd++)
{
int sid = tcgetsid (fd);
if (!(sid == -1 ? errno == ENOSYS : sid == getpid ()))
abort ();
}
}
return 0;
}
int main() {
char cmdline[MAXLINE];
forepid = 0;
printf("tcgetsid: %d getsid=%d tcgetpgrp=%d myshell pgrp=%d\n",
tcgetsid(STDIN_FILENO), getsid(getpid()), tcgetpgrp(STDIN_FILENO), getpgrp());
signal(SIGINT, sigint_handler);
signal(SIGTSTP, sigtstp_handler);
signal(SIGCHLD, sigchld_handler);
signal(SIGALRM, sigalarm_handler);
initjobs();
sigsetjmp(env, 1);
while (1) {
printf("myshell> ");
Fgets(cmdline, MAXLINE, stdin);
if (feof(stdin))
exit(0);
eval(cmdline);
}
}
int main() {
char cmdline[MAXLINE];
control_block();
shellpid = getpgrp();
forepid = 0;
printf("tcgetsid: %d\ngetsid=%d\ntcgetpgrp=%d\nmyshell pgrp=%d\n",
tcgetsid(STDIN_FILENO), getsid(getpid()), tcgetpgrp(STDIN_FILENO), getpgrp());
if (signal(SIGCHLD, SIG_IGN) == SIG_ERR) {
printf("signal error\n");
exit(-1);
}
initjobs();
while (1) {
printf("myshell> ");
Fgets(cmdline, MAXLINE, stdin);
if (feof(stdin))
exit(0);
eval(cmdline);
}
}
r = open(tty_path, O_RDWR | O_NONBLOCK);
SOL_INT_CHECK_GOTO(r, < 0, end);
if (r != 0) {
r = dup2(r, 0);
SOL_INT_CHECK_GOTO(r, < 0, end);
}
r = dup2(STDIN_FILENO, 1);
SOL_INT_CHECK_GOTO(r, < 0, end);
r = dup2(STDIN_FILENO, 2);
SOL_INT_CHECK_GOTO(r, < 0, end);
fchown(STDIN_FILENO, 0, 0);
fchmod(STDIN_FILENO, 0620);
tsid = tcgetsid(STDIN_FILENO);
if (tsid < 0) {
r = ioctl(STDIN_FILENO, TIOCSCTTY, 1L);
SOL_INT_CHECK_GOTO(r, < 0, end);
}
r = tcsetpgrp(STDIN_FILENO, pid);
SOL_INT_CHECK_GOTO(r, < 0, end);
end:
ioctl(STDIN_FILENO, TIOCSCTTY, 0);
chdir("/");
execle(shell, shell, NULL, envp);
}
static void
on_fork(void *data)
void runSuccess() {
tcgetsid(anyint());
}
int main(void) {
printf("We are pid %d\n", getpid());
printf("The session ID for this terminal %d\n", tcgetsid(0));
printf("The process group for this terminal %d\n", tcgetpgrp(0));
exit(EXIT_SUCCESS);
}
