gdb/unittests/scoped_fd-selftests.c

   1 /* Self tests for scoped_fd for GDB, the GNU debugger.
   2
   3    Copyright (C) 2018 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "defs.h"
  21
  22 #include "common/scoped_fd.h"
  23 #include "config.h"
  24
  25 #ifdef HAVE_UNISTD_H
  26
  27 #include "selftest.h"
  28
  29 namespace selftests {
  30 namespace scoped_fd {
  31
  32 /* Test that the file descriptor is closed.  */
  33 static void
  34 test_destroy ()
  35 {
  36   char filename[] = "scoped_fd-selftest-XXXXXX";
  37   int fd = mkstemp (filename);
  38   SELF_CHECK (fd >= 0);
  39
  40   unlink (filename);
  41   errno = 0;
  42   {
  43     ::scoped_fd sfd (fd);
  44
  45     SELF_CHECK (sfd.get () == fd);
  46   }
  47
  48   SELF_CHECK (close (fd) == -1 && errno == EBADF);
  49 }
  50
  51 /* Test that the file descriptor can be released.  */
  52 static void
  53 test_release ()
  54 {
  55   char filename[] = "scoped_fd-selftest-XXXXXX";
  56   int fd = mkstemp (filename);
  57   SELF_CHECK (fd >= 0);
  58
  59   unlink (filename);
  60   errno = 0;
  61   {
  62     ::scoped_fd sfd (fd);
  63
  64     SELF_CHECK (sfd.release () == fd);
  65   }
  66
  67   SELF_CHECK (close (fd) == 0 || errno != EBADF);
  68 }
  69
  70 /* Run selftests.  */
  71 static void
  72 run_tests ()
  73 {
  74   test_destroy ();
  75   test_release ();
  76 }
  77
  78 } /* namespace scoped_fd */
  79 } /* namespace selftests */
  80
  81 #endif /* HAVE_UNISTD_H */
  82
  83 void
  84 _initialize_scoped_fd_selftests ()
  85 {
  86 #ifdef HAVE_UNISTD_H
  87   selftests::register_test ("scoped_fd",
  88                             selftests::scoped_fd::run_tests);
  89 #endif
  90 }