Add fxstat check to glibc_syscall_wrappers test.

tests/glibc_syscall_wrappers/test_fstat.c

+/*
+ * Copyright 2010 The Native Client 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 <assert.h>
+#include <errno.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <sys/stat.h>
+
+#pragma GCC diagnostic ignored "-Wnonnull"

[khim, 2011/01/18 16:05:41]

Why do you need this option?

+
+#define KNOWN_FILE_SIZE 30

[khim, 2011/01/18 16:05:41]

This is kind of strange: some information goes to test_fstat.stdout while the
filesize is hardcoded in source. Why not print it out and add to
test_fstat.stdout ?

+
+int main(int argc, char** argv) {
+  struct stat st;
+  FILE* file;
+  int fd;
+  if (2 != argc) {
+    printf("Usage: sel_ldr test_fstat.nexe test_stat_data\n");
+    return 1;
+  }
+  st.st_size = 0;
+  printf(
+      "%d+%d %d+%d %d+%d %d+%d %d+%d %d+%d %d+%d %d+%d %d+%d %d+%d %d+%d %d\n",
+      offsetof(struct stat,st_dev),sizeof(st.st_dev),
+      offsetof(struct stat,st_ino),sizeof(st.st_ino),
+      offsetof(struct stat,st_mode),sizeof(st.st_mode),
+      offsetof(struct stat,st_nlink),sizeof(st.st_nlink),
+      offsetof(struct stat,st_uid),sizeof(st.st_uid),
+      offsetof(struct stat,st_gid),sizeof(st.st_gid),
+      offsetof(struct stat,st_rdev),sizeof(st.st_rdev),
+      offsetof(struct stat,st_size),sizeof(st.st_size),
+      offsetof(struct stat,st_blksize),sizeof(st.st_blksize),
+      offsetof(struct stat,st_blocks),sizeof(st.st_blocks),
+      offsetof(struct stat,st_atim),sizeof(st.st_atim),
+      sizeof(st));
+  file = fopen( argv[1], "r");
+  assert (NULL != file);
+  fd = fileno(file);
+  errno = 0;
+  assert (0 ==  fstat(fd, &st));
+  assert (KNOWN_FILE_SIZE == st.st_size);
+  assert (0 == errno);
+  assert (0 == fclose(file));
+  errno = 0;
+  assert (-1 == fstat(-1, &st));
+  assert (EBADF == errno);
+  return 0;
+}