Implement getcwd.

2 files changed, 58 insertions, 0 deletions

diff --git a/sysdeps/nacl/getcwd.c b/sysdeps/nacl/getcwd.c
new file mode 100644
index 0000000000..ba7e49a036
--- /dev/null
+++ b/sysdeps/nacl/getcwd.c
@@ -0,0 +1,56 @@
+/* Get current working directory.  NaCl version.
+   Copyright (C) 2015 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 <limits.h>
+#include <stdlib.h>
+#include <nacl-interfaces.h>
+
+/* Get the pathname of the current working directory,
+   and put it in SIZE bytes of BUF.  Returns NULL if the
+   directory couldn't be determined or SIZE was too small.
+   If successful, returns BUF.  In GNU, if BUF is NULL,
+   an array is allocated with `malloc'; the array is SIZE
+   bytes long, unless SIZE <= 0, in which case it is as
+   big as necessary.  */
+char *
+__getcwd (char *buf, size_t size)
+{
+  char *use_buf = buf;
+
+  if (buf == NULL)
+    {
+      if (size == 0)
+        size = PATH_MAX;
+      use_buf = malloc (size);
+      if (__glibc_unlikely (use_buf == NULL))
+        return NULL;
+    }
+
+  int error = __nacl_irt_dev_filename.getcwd (use_buf, size);
+  if (__glibc_unlikely (error))
+    {
+      if (use_buf != buf)
+        free (use_buf);
+      errno = error;
+      return NULL;
+    }
+
+  return use_buf;
+}
+weak_alias (__getcwd, getcwd)
diff --git a/sysdeps/nacl/nacl-interface-list.h b/sysdeps/nacl/nacl-interface-list.h
index a13bb20aac..2ead2a6725 100644
--- a/sysdeps/nacl/nacl-interface-list.h
+++ b/sysdeps/nacl/nacl-interface-list.h
@@ -23,3 +23,5 @@ NACL_OPTIONAL_INTERFACE (rtld,
                          NACL_IRT_DYNCODE_v0_1, nacl_irt_dyncode)
 NACL_OPTIONAL_INTERFACE (rtld,
                          NACL_IRT_DEV_GETPID_v0_1, nacl_irt_dev_getpid)
+NACL_OPTIONAL_INTERFACE (rtld,
+                         NACL_IRT_DEV_FILENAME_v0_3, nacl_irt_dev_filename)