gdb/testsuite/gdb.base/attach-twice.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2011-2016 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 <stdio.h>
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <sys/ptrace.h>
  22 #include <errno.h>
  23
  24 int
  25 main (void)
  26 {
  27   long l;
  28
  29   switch (fork ())
  30   {
  31     case -1:
  32       perror ("fork");
  33       exit (1);
  34     case 0:
  35       errno = 0;
  36       ptrace (PTRACE_ATTACH, getppid (), NULL, NULL);
  37       if (errno != 0)
  38         perror ("PTRACE_ATTACH");
  39       break;
  40   }
  41   sleep (600);
  42   return 0;
  43 }