[NaCl SDK] nacl_io: remove getcwd() implemenation (rely on glibc/newlib versions)

native_client_sdk/src/libraries/nacl_io/kernel_intercept.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "nacl_io/kernel_intercept.h"
 
 #include <assert.h>
 #include <errno.h>
 #include <string.h>
 
@@ skipping 131 matching lines @@
 }
 
 void ki_exit(int status) {
   if (ki_is_initialized())
     s_state.kp->exit(status);
 
   _real_exit(status);
 }
 
 char* ki_getcwd(char* buf, size_t size) {
-  // gtest uses getcwd in a static initializer and expects it to always
-  // succeed.  If we haven't initialized kernel-intercept yet, then try
-  // the IRT's getcwd, and fall back to just returning ".".
-  if (!ki_is_initialized()) {
-    int rtn = _real_getcwd(buf, size);
-    if (rtn != 0) {
-      if (rtn == ENOSYS) {
-        buf[0] = '.';
-        buf[1] = 0;
-      } else {
-        errno = rtn;
-        return NULL;
-      }
-    }
-    return buf;
-  }
+  ON_NOSYS_RETURN(NULL);
   return s_state.kp->getcwd(buf, size);
 }
 
 char* ki_getwd(char* buf) {
   ON_NOSYS_RETURN(NULL);
   return s_state.kp->getwd(buf);
 }
 
 int ki_dup(int oldfd) {
   ON_NOSYS_RETURN(-1);
@@ skipping 456 matching lines @@
 int ki_socket(int domain, int type, int protocol) {
   ON_NOSYS_RETURN(-1);
   return s_state.kp->socket(domain, type, protocol);
 }
 
 int ki_socketpair(int domain, int type, int protocol, int* sv) {
   ON_NOSYS_RETURN(-1);
   return s_state.kp->socketpair(domain, type, protocol, sv);
 }
 #endif  // PROVIDES_SOCKET_API