in negative case:
QUICK_TEST(sched_getaffinity(getpid()+1, len, mask));
sometimes getpid()+1 will exist if there're other processes running.
This patch uses a different way to make sure the required pid doesn't
exist by forking a child and terminating it. The pid of the terminated
child will not be used for a short time and it's enough for the test to
continue.
Signed-off-by: Caspar Zhang <[email protected]>
---
.../sched_getaffinity/sched_getaffinity01.c | 18 ++++++++++++++++--
1 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/testcases/kernel/syscalls/sched_getaffinity/sched_getaffinity01.c b/testcases/kernel/syscalls/sched_getaffinity/sched_getaffinity01.c
index 97cf90f..80dea9a 100644
--- a/testcases/kernel/syscalls/sched_getaffinity/sched_getaffinity01.c
+++ b/testcases/kernel/syscalls/sched_getaffinity/sched_getaffinity01.c
@@ -94,7 +94,7 @@ int main(int ac, char **av)
static void do_test(void)
{
- int i;
+ int i, status;
cpu_set_t *mask;
int nrcpus = 1024;
pid_t pid;
@@ -153,10 +153,24 @@ realloc:
#else
CPU_ZERO(mask);
#endif
+
/* negative tests */
+
QUICK_TEST(sched_getaffinity(0, len, (cpu_set_t *)-1));
+
QUICK_TEST(sched_getaffinity(0, 0, mask));
- QUICK_TEST(sched_getaffinity(getpid() + 1, len, mask));
+
+ switch (pid = fork()) {
+ case -1:
+ tst_brkm(TBROK|TERRNO, cleanup, "fork");
+ case 0:
+ exit(0);
+ default:
+ if (waitpid(pid, &status, WUNTRACED|WCONTINUED) == -1)
+ tst_brkm(TBROK|TERRNO, cleanup, "waitpid");
+ }
+ QUICK_TEST(sched_getaffinity(pid, len, mask));
+
/*
* pid_t -> int -- the actual kernel limit is lower
* though, but this is a negative test, not a positive
------------------------------------------------------------------------------
Virtualization & Cloud Management Using Capacity Planning
Cloud computing makes use of virtualization - but cloud computing
also focuses on allowing computing to be delivered as a service.
http://www.accelacomm.com/jaw/sfnl/114/51521223/
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