Adding upstream version 5.2.37.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

lib/tilde/shell.c

@@ -0,0 +1,79 @@
+/* shell.c -- tilde utility functions that are normally provided by
+	      bash when readline is linked as part of the shell. */
+
+/* Copyright (C) 1998-2017 Free Software Foundation, Inc.
+
+   This file is part of the GNU Tilde Library.
+
+   The GNU Tilde Library 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.
+
+   The GNU Tilde Library 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 the GNU Tilde Library.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#if defined (HAVE_CONFIG_H)
+#  include <config.h>
+#endif
+
+#if defined (HAVE_UNISTD_H)
+#  ifdef _MINIX
+#    include <sys/types.h>
+#  endif
+#  include <unistd.h>
+#endif /* HAVE_UNISTD_H */
+
+#if defined (HAVE_STDLIB_H)
+#  include <stdlib.h>
+#else
+#  include "ansi_stdlib.h"
+#endif /* HAVE_STDLIB_H */
+
+#if defined (HAVE_STRING_H)
+#  include <string.h>
+#else
+#  include <strings.h>
+#endif /* !HAVE_STRING_H */
+
+#include <pwd.h>
+
+#if !defined (HAVE_GETPW_DECLS)
+extern struct passwd *getpwuid ();
+#endif /* !HAVE_GETPW_DECLS */
+
+char *
+get_env_value (char *varname)
+{
+  return ((char *)getenv (varname));
+}
+
+/* If we're not using $HOME, assume that the passwd file information won't
+   change while this shell instance is running. */
+char *
+get_home_dir (void)
+{
+  static char *home_dir = (char *)NULL;
+  struct passwd *entry;
+
+  if (home_dir)
+    return (home_dir);
+
+#if defined (HAVE_GETPWUID)
+  entry = getpwuid (getuid ());
+  if (entry)
+    home_dir = savestring (entry->pw_dir);
+#endif
+
+#if defined (HAVE_GETPWENT)
+  endpwent ();		/* some systems need this */
+#endif
+
+  return (home_dir);
+}