sched_setscheduler/17-5.c: Add the missing scheduling policies.

On linux, I found the scheduling policies are defined as follow:

in /usr/include/bits/sched.h

/* Scheduling algorithms. */

#define SCHED_OTHER             0
#define SCHED_FIFO              1
#define SCHED_RR                2
#ifdef __USE_GNU
# define SCHED_BATCH            3
# define SCHED_IDLE             5

# define SCHED_RESET_ON_FORK    0x40000000
#endif

So besides SCHED_OTHER, SCHED_FIFO and SCHED_RR, there are another two policies, SCHED_BATCH and SCHED_IDLE. And 3 is a valid value for the scheduling policy, which causes the test returns UNSOLVED on linux system.

Here is the patch, please comment!
Thanks.:)

Signed-off-by Tang Chen <[email protected]>

---
 .../interfaces/sched_setscheduler/17-5.c           |   11 ++++++++++-
 1 files changed, 10 insertions(+), 1 deletions(-)

testcases/open_posix_testsuite/conformance/interfaces/sched_setscheduler/17-5.c +9 -0

index b4f90b3..652db27 100644
@@ -17,6 +17,11 @@
  *   2. Call sched_setscheduler with invalid args.
  *   3. Check that the policy and priority have not changed.
  */
+
+#ifdef __linux__
+#define _GNU_SOURCE
+#endif
+
 #include <sched.h>
 #include <stdio.h>
 #include <errno.h>

@@ -31,6 +36,10 @@ int main() {
 	invalid_policy = 0;
 	/* Linux does not treat minus value as invalid for policy */
 	while (invalid_policy == SCHED_OTHER ||
+#ifdef _GNU_SOURCE
+		invalid_policy == SCHED_BATCH ||
+		invalid_policy == SCHED_IDLE ||
+#endif
 		invalid_policy == SCHED_FIFO ||
 		invalid_policy == SCHED_RR)
 	invalid_policy++;