[Feature][ZXW-33]merge ZXW 0428 version
Change-Id: I11f167edfea428d9fab198ff00ff1364932d1b0b
diff --git a/ap/libc/glibc/glibc-2.23/io/getdirname.c b/ap/libc/glibc/glibc-2.23/io/getdirname.c
new file mode 100644
index 0000000..2152623
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/io/getdirname.c
@@ -0,0 +1,43 @@
+/* Copyright (C) 1992-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#include <unistd.h>
+#include <include/sys/stat.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Return a malloc'd string containing the current directory name.
+ If the environment variable `PWD' is set, and its value is correct,
+ that value is used. */
+
+char *
+get_current_dir_name (void)
+{
+ char *pwd;
+ struct stat64 dotstat, pwdstat;
+
+ pwd = getenv ("PWD");
+ if (pwd != NULL
+ && stat64 (".", &dotstat) == 0
+ && stat64 (pwd, &pwdstat) == 0
+ && pwdstat.st_dev == dotstat.st_dev
+ && pwdstat.st_ino == dotstat.st_ino)
+ /* The PWD value is correct. Use it. */
+ return __strdup (pwd);
+
+ return __getcwd ((char *) NULL, 0);
+}