gdb/unittests/scoped_fd-selftests.c

   1 /* Self tests for scoped_fd for GDB, the GNU debugger.
   2
   3    Copyright (C) 2018-2019 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/filestuff.h"
  23 #include "common/scoped_fd.h"
  24 #include "config.h"
  25 #include "selftest.h"
  26
  27 namespace selftests {
  28 namespace scoped_fd {
  29
  30 /* Test that the file descriptor is closed.  */
  31 static void
  32 test_destroy ()
  33 {
  34   char filename[] = "scoped_fd-selftest-XXXXXX";
  35   int fd = gdb_mkostemp_cloexec (filename);
  36   SELF_CHECK (fd >= 0);
  37
  38   unlink (filename);
  39   errno = 0;
  40   {
  41     ::scoped_fd sfd (fd);
  42
  43     SELF_CHECK (sfd.get () == fd);
  44   }
  45
  46   SELF_CHECK (close (fd) == -1 && errno == EBADF);
  47 }
  48
  49 /* Test that the file descriptor can be released.  */
  50 static void
  51 test_release ()
  52 {
  53   char filename[] = "scoped_fd-selftest-XXXXXX";
  54   int fd = gdb_mkostemp_cloexec (filename);
  55   SELF_CHECK (fd >= 0);
  56
  57   unlink (filename);
  58   errno = 0;
  59   {
  60     ::scoped_fd sfd (fd);
  61
  62     SELF_CHECK (sfd.release () == fd);
  63   }
  64
  65   SELF_CHECK (close (fd) == 0 || errno != EBADF);
  66 }
  67
  68 /* Test that the file descriptor can be converted to a FILE *.  */
  69 static void
  70 test_to_file ()
  71 {
  72   char filename[] = "scoped_fd-selftest-XXXXXX";
  73
  74   ::scoped_fd sfd (gdb_mkostemp_cloexec (filename));
  75   SELF_CHECK (sfd.get () >= 0);
  76
  77   unlink (filename);
  78
  79   gdb_file_up file = sfd.to_file ("rw");
  80   SELF_CHECK (file != nullptr);
  81   SELF_CHECK (sfd.get () == -1);
  82 }
  83
  84 /* Run selftests.  */
  85 static void
  86 run_tests ()
  87 {
  88   test_destroy ();
  89   test_release ();
  90   test_to_file ();
  91 }
  92
  93 } /* namespace scoped_fd */
  94 } /* namespace selftests */
  95
  96 void
  97 _initialize_scoped_fd_selftests ()
  98 {
  99   selftests::register_test ("scoped_fd",
 100                             selftests::scoped_fd::run_tests);
 101 }