gdb/unittests/scoped_fd-selftests.c

   1 /* Self tests for scoped_fd for GDB, the GNU debugger.
   2
   3    Copyright (C) 2018-2024 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
  21 #include "gdbsupport/filestuff.h"
  22 #include "gdbsupport/scoped_fd.h"
  23 #include "config.h"
  24 #include "gdbsupport/selftest.h"
  25
  26 namespace selftests {
  27 namespace scoped_fd {
  28
  29 /* Test that the file descriptor is closed.  */
  30 static void
  31 test_destroy ()
  32 {
  33   char filename[] = "scoped_fd-selftest-XXXXXX";
  34   int fd = gdb_mkostemp_cloexec (filename).release ();
  35   SELF_CHECK (fd >= 0);
  36
  37   unlink (filename);
  38   errno = 0;
  39   {
  40     ::scoped_fd sfd (fd);
  41
  42     SELF_CHECK (sfd.get () == fd);
  43   }
  44
  45   SELF_CHECK (close (fd) == -1 && errno == EBADF);
  46 }
  47
  48 /* Test that the file descriptor can be released.  */
  49 static void
  50 test_release ()
  51 {
  52   char filename[] = "scoped_fd-selftest-XXXXXX";
  53   int fd = gdb_mkostemp_cloexec (filename).release ();
  54   SELF_CHECK (fd >= 0);
  55
  56   unlink (filename);
  57   errno = 0;
  58   {
  59     ::scoped_fd sfd (fd);
  60
  61     SELF_CHECK (sfd.release () == fd);
  62   }
  63
  64   SELF_CHECK (close (fd) == 0 || errno != EBADF);
  65 }
  66
  67 /* Test that the file descriptor can be converted to a FILE *.  */
  68 static void
  69 test_to_file ()
  70 {
  71   char filename[] = "scoped_fd-selftest-XXXXXX";
  72
  73   ::scoped_fd sfd = gdb_mkostemp_cloexec (filename);
  74   SELF_CHECK (sfd.get () >= 0);
  75
  76   unlink (filename);
  77
  78   gdb_file_up file = sfd.to_file ("rw");
  79   SELF_CHECK (file != nullptr);
  80   SELF_CHECK (sfd.get () == -1);
  81 }
  82
  83 /* Run selftests.  */
  84 static void
  85 run_tests ()
  86 {
  87   test_destroy ();
  88   test_release ();
  89   test_to_file ();
  90 }
  91
  92 } /* namespace scoped_fd */
  93 } /* namespace selftests */
  94
  95 void _initialize_scoped_fd_selftests ();
  96 void
  97 _initialize_scoped_fd_selftests ()
  98 {
  99   selftests::register_test ("scoped_fd",
 100                             selftests::scoped_fd::run_tests);
 101 }