1 files changed, 95 insertions, 0 deletions
diff --git a/gdbsupport/gdb_tilde_expand.c b/gdbsupport/gdb_tilde_expand.c
new file mode 100644
index 00000000000..6671629a17e
--- /dev/null
+++ b/gdbsupport/gdb_tilde_expand.c
@@ -0,0 +1,95 @@
+/* Perform tilde expansion on paths for GDB and gdbserver.
+
+   Copyright (C) 2017-2020 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 "common-defs.h"
+#include "gdb_tilde_expand.h"
+#include <glob.h>
+
+/* RAII-style class wrapping "glob".  */
+
+class gdb_glob
+{
+public:
+  /* Construct a "gdb_glob" object by calling "glob" with the provided
+     parameters.  This function can throw if "glob" fails.  */
+  gdb_glob (const char *pattern, int flags,
+	    int (*errfunc) (const char *epath, int eerrno))
+  {
+    int ret = glob (pattern, flags, errfunc, &m_glob);
+
+    if (ret != 0)
+      {
+	if (ret == GLOB_NOMATCH)
+	  error (_("Could not find a match for '%s'."), pattern);
+	else
+	  error (_("glob could not process pattern '%s'."),
+		 pattern);
+      }
+  }
+
+  /* Destroy the object and free M_GLOB.  */
+  ~gdb_glob ()
+  {
+    globfree (&m_glob);
+  }
+
+  /* Return the GL_PATHC component of M_GLOB.  */
+  int pathc () const
+  {
+    return m_glob.gl_pathc;
+  }
+
+  /* Return the GL_PATHV component of M_GLOB.  */
+  char **pathv () const
+  {
+    return m_glob.gl_pathv;
+  }
+
+private:
+  /* The actual glob object we're dealing with.  */
+  glob_t m_glob;
+};
+
+/* See gdbsupport/gdb_tilde_expand.h.  */
+
+std::string
+gdb_tilde_expand (const char *dir)
+{
+  gdb_glob glob (dir, GLOB_TILDE_CHECK, NULL);
+
+  gdb_assert (glob.pathc () > 0);
+  /* "glob" may return more than one match to the path provided by the
+     user, but we are only interested in the first match.  */
+  std::string expanded_dir = glob.pathv ()[0];
+
+  return expanded_dir;
+}
+
+/* See gdbsupport/gdb_tilde_expand.h.  */
+
+gdb::unique_xmalloc_ptr<char>
+gdb_tilde_expand_up (const char *dir)
+{
+  gdb_glob glob (dir, GLOB_TILDE_CHECK, NULL);
+
+  gdb_assert (glob.pathc () > 0);
+  /* "glob" may return more than one match to the path provided by the
+     user, but we are only interested in the first match.  */
+  return make_unique_xstrdup (glob.pathv ()[0]);
+}