1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2017-2019 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 /* This program is intended to be started outside of gdb, and then 19 attached to by gdb. It loops for a while, but not forever. */ 20 21 #include <unistd.h> 22 #include <stdio.h> 23 #include <sys/types.h> 24 #include <termios.h> 25 #include <unistd.h> 26 #include <signal.h> 27 28 int 29 main () 30 { 31 /* In case we inherit SIG_IGN. */ 32 signal (SIGTTOU, SIG_DFL); 33 34 alarm (30); 35 36 int count = 0; 37 while (1) 38 { 39 struct termios termios; 40 41 printf ("pid=%ld, count=%d\n", (long) getpid (), count++); 42 43 /* This generates a SIGTTOU if our progress group is not in the 44 foreground. */ 45 tcgetattr (0, &termios); 46 tcsetattr (0, TCSANOW, &termios); 47 48 usleep (100000); 49 } 50 51 return 0; 52 } 53