Move mkdir_recursive to common/filestuff.c

This moves mkdir_recursive from dwarf-index-cache.c to
common/filestuff.c, and also changes it to return a boolean that says
whether or not it worked.

gdb/ChangeLog
2018-10-27  Tom Tromey  <tom@tromey.com>

	* unittests/mkdir-recursive-selftests.c: New file.
	* Makefile.in (SUBDIR_UNITTESTS_SRCS): Add
	unittests/mkdir-recursive-selftests.c.
	* dwarf-index-cache.c (mkdir_recursive): Move to
	common/filestuff.c.
	(index_cache::store): Check return value of mkdir_recursive.
	(create_dir_and_check, test_mkdir_recursive): Move to new file.
	(_initialize_index_cache): Don't register test.
	* common/filestuff.h (mkdir_recursive): Declare.
	* common/filestuff.c (mkdir_recursive): Move from
	dwarf-index-cache.c.  Return bool.

1 files changed, 89 insertions, 0 deletions

diff --git a/gdb/unittests/mkdir-recursive-selftests.c b/gdb/unittests/mkdir-recursive-selftests.c
new file mode 100644
index 0000000..d501f8e
--- /dev/null
+++ b/gdb/unittests/mkdir-recursive-selftests.c
@@ -0,0 +1,89 @@
+/* Self tests for scoped_fd for GDB, the GNU debugger.
+
+   Copyright (C) 2018 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+
+#include "common/filestuff.h"
+#include "selftest.h"
+
+namespace selftests {
+namespace mkdir_recursive {
+
+/* Try to create DIR using mkdir_recursive and make sure it exists.  */
+
+static bool
+create_dir_and_check (const char *dir)
+{
+  ::mkdir_recursive (dir);
+
+  struct stat st;
+  if (stat (dir, &st) != 0)
+    perror_with_name (("stat"));
+
+  return (st.st_mode & S_IFDIR) != 0;
+}
+
+/* Test mkdir_recursive.  */
+
+static void
+test ()
+{
+  char base[] = "/tmp/gdb-selftests-XXXXXX";
+
+  if (mkdtemp (base) == NULL)
+    perror_with_name (("mkdtemp"));
+
+  /* Try not to leave leftover directories.  */
+  struct cleanup_dirs {
+    cleanup_dirs (const char *base)
+      : m_base (base)
+    {}
+
+    ~cleanup_dirs () {
+      rmdir (string_printf ("%s/a/b/c/d/e", m_base).c_str ());
+      rmdir (string_printf ("%s/a/b/c/d", m_base).c_str ());
+      rmdir (string_printf ("%s/a/b/c", m_base).c_str ());
+      rmdir (string_printf ("%s/a/b", m_base).c_str ());
+      rmdir (string_printf ("%s/a", m_base).c_str ());
+      rmdir (m_base);
+    }
+
+  private:
+    const char *m_base;
+  } cleanup_dirs (base);
+
+  std::string dir = string_printf ("%s/a/b", base);
+  SELF_CHECK (create_dir_and_check (dir.c_str ()));
+
+  dir = string_printf ("%s/a/b/c//d/e/", base);
+  SELF_CHECK (create_dir_and_check (dir.c_str ()));
+}
+
+}
+}
+
+void
+_initialize_mkdir_recursive_selftests ()
+{
+#if defined (HAVE_MKDTEMP)
+  selftests::register_test ("mkdir_recursive",
+			    selftests::mkdir_recursive::test);
+#endif
+}
+