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-rw-r--r--REORG.TODO/io/getdirname.c43
1 files changed, 43 insertions, 0 deletions
diff --git a/REORG.TODO/io/getdirname.c b/REORG.TODO/io/getdirname.c
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+++ b/REORG.TODO/io/getdirname.c
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+/* Copyright (C) 1992-2017 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);
+}