Provides some of the missing POSIX file syscalls

tests/syscalls/syscalls.cc

Index: tests/syscalls/syscalls.cc
diff --git a/tests/syscalls/syscalls.cc b/tests/syscalls/syscalls.cc
index 4612c90d9c6532cd722a89c5544381c73d2985e9..fedd824ecd417d761cdd77768a0607cc1ca1ff0e 100644
--- a/tests/syscalls/syscalls.cc
+++ b/tests/syscalls/syscalls.cc
@@ -103,6 +103,26 @@ bool test_unlink(const char *test_file) {
   return passed("test_unlink", "all");
 }
 
+bool test_truncate(const char *test_file) {
+  return passed("test_truncate", "all");
+}
+
+bool test_symlink_readlink(const char *test_file) {
+  return passed("test_symlink_readlink", "all");
+}
+
+bool test_chmod_access(const char *test_file) {
+  return passed("test_chmod_access", "all");
+}
+
+bool test_rename(const char *test_file) {
+  return passed("test_rename", "all");
+}
+
+bool test_utimes(const char *test_file) {
+  return passed("test_utimes", "all");
+}
+
 #else
 
 // Simple test that chdir returns zero for '.'.  chdir gets more
@@ -211,6 +231,70 @@ bool test_unlink(const char *test_file) {
   return passed("test_unlink", "all");
 }
 
+bool test_truncate(const char *test_file) {
+  char buffer[PATH_MAX];
+  struct stat stbuf;
+  int retval;
+  snprintf(buffer, PATH_MAX, "%s.tmp", test_file);
+  buffer[PATH_MAX - 1] = '\0';
+
+  int fd = open(buffer, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
+  ASSERT_MSG(fd >= 0, "open() failed");
+
+  retval = close(fd);
+  ASSERT_EQ_MSG(retval, 0, "close() failed");
+
+  retval = truncate(buffer, 4096);
+  ASSERT_EQ_MSG(retval, 0, "truncate() failed");
+
+  retval = stat(buffer, &stbuf);
+  ASSERT_EQ_MSG(retval, 0, "stat() failed");
+
+  ASSERT_EQ(stbuf.st_size, 4096);
+
+  return passed("test_truncate", "all");
+}
+
+bool test_symlink_readlink(const char *test_file) {
+  char oldpath[PATH_MAX];
+  char newpath[PATH_MAX];
+  char buffer[PATH_MAX];
+  int retval;
+
+  snprintf(oldpath, PATH_MAX, "%s.tmp", test_file);
+  buffer[PATH_MAX - 1] = '\0';
+
+  int fd = open(oldpath, O_WRONLY | O_CREAT | O_TRUNC, S_IRUSR | S_IWUSR);
+  ASSERT_MSG(fd >= 0, "open() failed");
+
+  retval = close(fd);
+  ASSERT_EQ_MSG(retval, 0, "close() failed");
+
+  snprintf(newpath, PATH_MAX, "%s_link.tmp", test_file);
+  newpath[PATH_MAX - 1] = '\0';
+
+  retval = symlink(oldpath, newpath);
+  ASSERT_EQ_MSG(retval, 0, "symlink() failed");
+
+  retval = readlink(newpath, buffer, sizeof buffer);
+  ASSERT_EQ_MSG(retval, 0, "readlink() failed");
+  ASSERT_EQ(strcmp(oldpath, buffer), 0);
+
+  return passed("test_symlink_readlink", "all");
+}
+
+bool test_chmod_access(const char *test_file) {
+  return passed("test_chmod_access", "all");
+}
+
+bool test_rename(const char *test_file) {
+  return passed("test_rename", "all");
+}
+
+bool test_utimes(const char *test_file) {
+  return passed("test_utimes", "all");
+}
+
 #endif  // !TESTS_USE_IRT
 
 // open() returns the new file descriptor, or -1 if an error occurred
@@ -536,6 +620,11 @@ bool testSuite(const char *test_file) {
   ret &= test_write(test_file);
   ret &= test_lseek(test_file);
   ret &= test_unlink(test_file);
+  ret &= test_truncate(test_file);
+  ret &= test_symlink_readlink(test_file);
+  ret &= test_chmod_access(test_file);
+  ret &= test_rename(test_file);
+  ret &= test_utimes(test_file);
   ret &= test_chdir();
   ret &= test_getcwd();
   ret &= test_mkdir_rmdir(test_file);