[LTP] [PATCH] waitpid/waitpid03: break test if fork failed

[Han Pingtian]

On Tue, Apr 12, 2016 at 05:52:41PM +0200, Cyril Hrubis wrote:
> Hi!
> > -				tst_resm(TFAIL, "cannot open fork #%d", ikids);
> > +				tst_brkm(TBROK|TERRNO, cleanup,
> > +					 "cannot open fork #%d", ikids);
> 
> I guess that we should kill any of the allready sleeping children at this point.
> 
> If we move the pid[] array to be global we can create a kill_children()
> function to send a signal to all pids in pid[] that are > 0 and call it
> if fork fails with SIGKILL as well as from the main loop with the
> SIGTERM as well.
> 
Thanks. How about this one? I think it is simple and enough for the
purpose.


>From 5ec101da361dae875fc3f9293cf4ec65be8bbb93 Mon Sep 17 00:00:00 2001
From: Han Pingtian <hanpt@linux.vnet.ibm.com>
Date: Tue, 12 Apr 2016 11:12:28 +0800
Subject: [PATCH] waitpid/waitpid03: break test if fork failed

If continue after the fork failure, a lot of processes may be killed by
the kill() on line 125.

Signed-off-by: Han Pingtian <hanpt@linux.vnet.ibm.com>
---
 testcases/kernel/syscalls/waitpid/waitpid03.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/testcases/kernel/syscalls/waitpid/waitpid03.c b/testcases/kernel/syscalls/waitpid/waitpid03.c
index 2599a92..ba4be50 100644
--- a/testcases/kernel/syscalls/waitpid/waitpid03.c
+++ b/testcases/kernel/syscalls/waitpid/waitpid03.c
@@ -106,7 +106,13 @@ int main(int argc, char **argv)
 				if (DEBUG)
 					tst_resm(TINFO, "child # %d", ikids);
 			} else if (pid[ikids] == -1) {
-				tst_resm(TFAIL, "cannot open fork #%d", ikids);
+				int i;
+
+				for (i = 1; i < ikids; i++)
+					kill(pid[i], 9);
+
+				tst_brkm(TBROK|TERRNO, cleanup,
+					 "cannot open fork #%d", ikids);
 			} else {
 #ifdef UCLINUX
 				if (self_exec(argv[0], "d", ikids) < 0) {
-- 
1.9.3