Author: ngie
Date: Wed Dec 7 00:55:36 2016
New Revision: 309661
URL: https://svnweb.freebsd.org/changeset/base/309661
Log:
MFC r306962:
r306962 (by br):
Ensure data in pipe is available to read.
Useful for latest (5th, direct mode) test only.
Modified:
stable/11/tests/sys/kern/pipe/pipe_fstat_bug_test.c
Directory Properties:
stable/11/ (props changed)
Modified: stable/11/tests/sys/kern/pipe/pipe_fstat_bug_test.c
==============================================================================
--- stable/11/tests/sys/kern/pipe/pipe_fstat_bug_test.c Tue Dec 6 23:52:56
2016 (r309660)
+++ stable/11/tests/sys/kern/pipe/pipe_fstat_bug_test.c Wed Dec 7 00:55:36
2016 (r309661)
@@ -26,6 +26,7 @@ SUCH DAMAGE.
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
+#include <sys/event.h>
#include <assert.h>
#include <err.h>
#include <errno.h>
@@ -49,10 +50,12 @@ main(void)
{
char buffer[32768], buffer2[32768], go[] = "go", go2[] = "go2";
int desc[2], ipc_coord[2];
+ struct kevent event, ke;
ssize_t error;
int successes = 0;
struct stat status;
pid_t new_pid;
+ int kq;
error = pipe(desc);
if (error == -1)
@@ -118,9 +121,24 @@ main(void)
_exit(0);
}
+ kq = kqueue();
+ if (kq == -1)
+ _exit(1);
+
+ EV_SET(&ke, desc[0], EVFILT_READ, EV_ADD, 0, 0, NULL);
+
+ /* Attach event to the kqueue. */
+ if (kevent(kq, &ke, 1, NULL, 0, NULL) != 0)
+ _exit(2);
+
while (successes < 5) {
SYNC_W(1, go);
SYNC_R(1, go2);
+
+ /* Ensure data is available to read */
+ if (kevent(kq, NULL, 0, &event, 1, NULL) != 1)
+ _exit(3);
+
fstat(desc[0], &status);
error = read(desc[0], &buffer2, sizeof(buffer2));
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