[NaCl SDK] Remove syscalls wrappers for chmod and unlink.

native_client_sdk/src/libraries/nacl_io/kernel_wrap_glibc.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 <sys/types.h>  // Include something that will define __GLIBC__.
 
 // The entire file is wrapped in this #if. We do this so this .cc file can be
 // compiled, even on a non-glibc build.
 #if defined(__native_client__) && defined(__GLIBC__)
 
@@ skipping 141 matching lines @@
   OP(recv);                              \
   OP(recvmsg);                           \
   OP(recvfrom);                          \
   OP(getpeername);                       \
   OP(getsockname);                       \
   OP(getsockopt);                        \
   OP(setsockopt);                        \
   OP(socketpair);                        \
   OP(shutdown);                          \
                                          \
+  OP(chmod);                             \
   OP(access);                            \
   OP(unlink);                            \
   OP(fchdir);                            \
   OP(fchmod);                            \
   OP(fsync);                             \
   OP(fdatasync);                         \
   OP(lstat);                             \
+  OP(link);                              \
   OP(readlink);                          \
   OP(utimes);
 
 // TODO(bradnelson): Add these as well.
 // OP(epoll_create);
 // OP(epoll_create1);
 // OP(epoll_ctl);
 // OP(epoll_pwait);
 // OP(ppoll);
 // OP(pselect);
@@ skipping 149 matching lines @@
 
 int WRAP(lstat)(const char* pathname, struct nacl_abi_stat* nacl_buf) {
   struct stat buf;
   memset(&buf, 0, sizeof(struct stat));
   int res = ki_lstat(pathname, &buf);
   RTN_ERRNO_IF(res < 0);
   stat_to_nacl_stat(&buf, nacl_buf);
   return 0;
 }
 
+int WRAP(link)(const char* pathname, const char* newpath) {
+  ERRNO_RTN(ki_link(pathname, newpath));
+}
+
 int WRAP(readlink)(const char* pathname,
                    char* buf,
                    size_t count,
                    size_t* nread) {
   int rtn = ki_readlink(pathname, buf, count);
   RTN_ERRNO_IF(rtn < 0);
   *nread = rtn;
   return 0;
 }
 
 int WRAP(utimes)(const char *filename, const struct timeval *times) {
   ERRNO_RTN(ki_utimes(filename, times));
 }
 
+int WRAP(chmod)(const char* pathname, mode_t mode) {
+  ERRNO_RTN(ki_chmod(pathname, mode));
+}
+
 int WRAP(access)(const char* pathname, int amode) {
   ERRNO_RTN(ki_access(pathname, amode));
 }
 
 int WRAP(unlink)(const char* pathname) {
   ERRNO_RTN(ki_unlink(pathname));
 }
 
 int WRAP(fchdir)(int fd) {
   ERRNO_RTN(ki_fchdir(fd));
@@ skipping 142 matching lines @@
   if (!assigned) {
     EXPAND_SYMBOL_LIST_OPERATION(ASSIGN_REAL_PTR)
     assigned = true;
   }
 }
 
 #define CHECK_REAL(func) \
   if (!REAL(func))       \
     assign_real_pointers();
 
+#define CHECK_REAL_NOSYS(func)  \
+  CHECK_REAL(func)              \
+  if (!REAL(func))              \
+    return ENOSYS;
+
 // "real" functions, i.e. the unwrapped original functions.
 
 int _real_close(int fd) {
   CHECK_REAL(close);
   return REAL(close)(fd);
 }
 
 void _real_exit(int status) {
   CHECK_REAL(exit);
   REAL(exit)(status);
@@ skipping 85 matching lines @@
 int _real_rmdir(const char* pathname) {
   CHECK_REAL(rmdir);
   return REAL(rmdir)(pathname);
 }
 
 int _real_write(int fd, const void* buf, size_t count, size_t* nwrote) {
   CHECK_REAL(write);
   return REAL(write)(fd, buf, count, nwrote);
 }
 
+int _real_getcwd(char* pathname, size_t len) {
+  CHECK_REAL_NOSYS(getcwd);
+  return REAL(getcwd)(pathname, len);
+}
+
 static bool s_wrapped = false;
 void kernel_wrap_init() {
   if (!s_wrapped) {
     LOG_TRACE("kernel_wrap_init");
     assign_real_pointers();
     EXPAND_SYMBOL_LIST_OPERATION(USE_WRAP)
     s_wrapped = true;
   }
 }
 
 void kernel_wrap_uninit() {
   if (s_wrapped) {
     LOG_TRACE("kernel_wrap_uninit");
     EXPAND_SYMBOL_LIST_OPERATION(USE_REAL)
     s_wrapped = false;
   }
 }
 
 EXTERN_C_END
 
 #endif  // defined(__native_client__) && defined(__GLIBC__)