#define _POSIX_C_SOURCE 1 #include #include #include #include int main(void) { pid_t pid = getpid(); pid_t pgrp = getpgrp(); for(;;) { printf("/%d/%d/ Groupe en avant-plan : %d\n", pid, pgrp, tcgetpgrp(STDIN_FILENO)); sleep(5); } return EXIT_SUCCESS; }