[LTP] [PATCH v2] dio_sparse: prevent race between kill and signal

[Jan Stancek <jstancek@redhat.com>]

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This is same change as in:
  commit d8f1292181b486b2073cc6fe1ec226f5cedea342
  Author: Cyril Hrubis <chrubis@suse.cz>
  Date:   Fri Mar 2 13:37:47 2012 +0100
      ltp-aiodio: aiodio_sparse fix race condition

but for dio_sparse.c, which is also prone to race
between kill() and signal().

Signed-off-by: Jan Stancek <jstancek@redhat.com>
---
 testcases/kernel/io/ltp-aiodio/dio_sparse.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)



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diff --git a/testcases/kernel/io/ltp-aiodio/dio_sparse.c b/testcases/kernel/io/ltp-aiodio/dio_sparse.c
index e93dcd9..97dbef8 100644
--- a/testcases/kernel/io/ltp-aiodio/dio_sparse.c
+++ b/testcases/kernel/io/ltp-aiodio/dio_sparse.c
@@ -149,10 +149,10 @@ int main(int argc, char **argv)
 	dirty_freeblocks(filesize);
 
 	tst_resm(TINFO, "Starting I/O tests");
+	signal(SIGTERM, SIG_DFL);
 	for (i = 0; i < num_children; i++) {
 		switch (pid[i] = fork()) {
 		case 0:
-			signal(SIGTERM, SIG_DFL);
 			read_sparse(filename, filesize);
 		break;
 		case -1:
@@ -164,6 +164,7 @@ int main(int argc, char **argv)
 			continue;
 		}
 	}
+	tst_sig(FORK, DEF_HANDLER, cleanup);
 	
 	ret = dio_sparse(filename, alignment, writesize, filesize);
 


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