1/* This testcase is part of GDB, the GNU debugger.
2
3   Copyright 2017-2020 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#include <stdlib.h>
19#include <unistd.h>
20
21/* GDB reads this to figure out the child's PID.  */
22pid_t child_pid;
23
24void
25marker (void)
26{
27}
28
29int
30main ()
31{
32  /* Don't let the test case run forever.  */
33  alarm (60);
34
35  child_pid = fork ();
36
37  switch (child_pid)
38    {
39    case -1:
40      return 1;
41
42    case 0:
43      break;
44
45    default:
46      /* In parent process.  */
47      while (1)
48	{
49	  marker ();
50	  usleep (1000);
51	}
52    }
53
54  /* In child process.  */
55
56  /* Alarms are not inherited by child processes. Set the alarm again to stop
57     the test case running forever.  */
58  alarm (60);
59
60  /* Detach from controlling terminal.  */
61  if (setsid () == (pid_t) -1)
62    return 1;
63
64  while (1)
65    usleep (1000);
66
67  return 0;
68}
69