Require getrandom(2).

It's almost 2018, Linux 3.17 -- the first kernel with getrandom(2) --
was released in October 2014, and being able to assume getrandom lets
us simplify and improve some security-related code in libc, and revert a
hack to getentropy that's been necessary in the meantime. Only the fugu
kernel doesn't have getrandom(2) at this point, and that's EOL.

Bug: http://b/67014255
Test: ran tests
Change-Id: I1736f4dd33d50fe99e7a524851180989f4c85a33

1 files changed, 0 insertions, 15 deletions

diff --git a/tests/sys_random_test.cpp b/tests/sys_random_test.cpp
index a25490c67..78cbf4a71 100644
--- a/tests/sys_random_test.cpp
+++ b/tests/sys_random_test.cpp
@@ -72,11 +72,6 @@ TEST(sys_random, getentropy_EIO) {
 
 TEST(sys_random, getrandom) {
 #if defined(HAVE_SYS_RANDOM)
-  if (getrandom(nullptr, 0, 0) == -1 && errno == ENOSYS) {
-    GTEST_LOG_(INFO) << "This test requires a >= 3.17 kernel with getrandom(2).\n";
-    return;
-  }
-
   char buf1[64];
   char buf2[64];
 
@@ -90,11 +85,6 @@ TEST(sys_random, getrandom) {
 
 TEST(sys_random, getrandom_EFAULT) {
 #if defined(HAVE_SYS_RANDOM)
-  if (getrandom(nullptr, 0, 0) == -1 && errno == ENOSYS) {
-    GTEST_LOG_(INFO) << "This test requires a >= 3.17 kernel with getrandom(2).\n";
-    return;
-  }
-
   errno = 0;
   ASSERT_EQ(-1, getrandom(nullptr, 256, 0));
   ASSERT_EQ(EFAULT, errno);
@@ -105,11 +95,6 @@ TEST(sys_random, getrandom_EFAULT) {
 
 TEST(sys_random, getrandom_EINVAL) {
 #if defined(HAVE_SYS_RANDOM)
-  if (getrandom(nullptr, 0, 0) == -1 && errno == ENOSYS) {
-    GTEST_LOG_(INFO) << "This test requires a >= 3.17 kernel with getrandom(2).\n";
-    return;
-  }
-
   errno = 0;
   char buf[64];
   ASSERT_EQ(-1, getrandom(buf, sizeof(buf), ~0));