Open source system call tests.

PiperOrigin-RevId: 224886231
Change-Id: I0fccb4d994601739d8b16b1d4e6b31f40297fb22

1 files changed, 42 insertions, 0 deletions

diff --git a/test/syscalls/linux/priority_execve.cc b/test/syscalls/linux/priority_execve.cc
new file mode 100644
index 000000000..5604bd3d0
--- /dev/null
+++ b/test/syscalls/linux/priority_execve.cc
@@ -0,0 +1,42 @@
+// Copyright 2018 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/resource.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+int main(int argc, char** argv, char** envp) {
+  errno = 0;
+  int prio = getpriority(PRIO_PROCESS, getpid());
+
+  // NOTE: getpriority() can legitimately return negative values
+  // in the range [-20, 0). If errno is set, exit with a value that
+  // could not be reached by a valid priority. Valid exit values
+  // for the test are in the range [1, 40], so we'll use 0.
+  if (errno != 0) {
+    printf("getpriority() failed with errno = %d\n", errno);
+    exit(0);
+  }
+
+  // Used by test to verify priority is being maintained through
+  // calls to execve(). Since prio should always be in the range
+  // [-20, 19], we offset by 20 so as not to have negative exit codes.
+  exit(20 - prio);
+
+  return 0;
+}