[NaCl SDK] Enable linux host build for nacl_io and nacl_io_tests.

native_client_sdk/src/libraries/nacl_io/kernel_wrap_dummy.cc

Index: native_client_sdk/src/libraries/nacl_io/kernel_wrap_dummy.cc
diff --git a/native_client_sdk/src/libraries/nacl_io/kernel_wrap_dummy.cc b/native_client_sdk/src/libraries/nacl_io/kernel_wrap_dummy.cc
new file mode 100644
index 0000000000000000000000000000000000000000..419b634ad1e2d798fc3e80b462dfc74354cd00a4
--- /dev/null
+++ b/native_client_sdk/src/libraries/nacl_io/kernel_wrap_dummy.cc
@@ -0,0 +1,76 @@
+#if defined WIN32 || defined __linux__

[binji, 2013/11/15 17:26:23]

copyright

[binji, 2013/11/15 17:26:23]

in the other files we use defined(...)

[Sam Clegg, 2013/11/15 18:13:34]

Done.

[Sam Clegg, 2013/11/15 18:13:34]

Done.

+
+#include <errno.h>
+
+#include "nacl_io/kernel_wrap.h"
+#include "nacl_io/kernel_wrap_real.h"
+
+// "real" functions, i.e. the unwrapped original functions. On Windows we don't

[binji, 2013/11/15 17:26:23]

change comment?

[Sam Clegg, 2013/11/15 18:13:34]

Done.

+// wrap, so the real functions aren't accessible. In most cases, we just fail.
+

[binji, 2013/11/15 17:26:23]

The linux host implementation is a bit different than the windows host was.
We're not saying that it is usable (because we don't wrap -- not even with
linker tricks), but we are saying that we use it for testing. Can we document
this somewhere?

+int _real_close(int fd) {
+  return ENOSYS;
+}
+
+int _real_fstat(int fd, struct stat *buf) {
+  return 0;
+}
+
+int _real_getdents(int fd, void* nacl_buf, size_t nacl_count, size_t *nread) {
+  return ENOSYS;
+}
+
+int _real_lseek(int fd, off_t offset, int whence, off_t* new_offset) {
+  return ENOSYS;
+}
+
+int _real_mkdir(const char* pathname, mode_t mode) {
+  return ENOSYS;
+}
+
+int _real_mmap(void** addr, size_t length, int prot, int flags, int fd,
+               off_t offset) {
+  return ENOSYS;
+}
+
+int _real_munmap(void* addr, size_t length) {
+  return ENOSYS;
+}
+
+int _real_open(const char* pathname, int oflag, mode_t cmode, int* newfd) {
+  return ENOSYS;
+}
+
+int _real_open_resource(const char* file, int* fd) {
+  return ENOSYS;
+}
+
+int _real_read(int fd, void *buf, size_t count, size_t *nread) {
+  *nread = count;
+  return 0;
+}
+
+int _real_rmdir(const char* pathname) {
+  return ENOSYS;
+}
+
+int _real_write(int fd, const void *buf, size_t count, size_t *nwrote) {
+  int rtn = write(fd, buf, count);
+  if (rtn < 0)
+    return -1;
+
+  *nwrote = rtn;
+  return 0;
+}
+
+#endif
+
+#ifdef __linux__
+
+void kernel_wrap_init() {
+}
+
+void kernel_wrap_uninit() {
+}
+
+#endif