[PATCH v2 3/8] ptsematest.c: Check return values of write() and ftruncate()

[Cheng-Yang Chou <yphbchou0911@gmail.com>]

Add error handling for write() to tracefs and ftruncate() on shared memory
to avoid ignoring errors.

Signed-off-by: Cheng-Yang Chou <yphbchou0911@gmail.com>
---
 src/ptsematest/ptsematest.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/ptsematest/ptsematest.c b/src/ptsematest/ptsematest.c
index d211669..787909c 100644
--- a/src/ptsematest/ptsematest.c
+++ b/src/ptsematest/ptsematest.c
@@ -62,6 +62,7 @@ void *semathread(void *param)
 	cpu_set_t mask;
 	int policy = SCHED_FIFO;
 	struct sched_param schedp;
+	int ret;
 
 	memset(&schedp, 0, sizeof(schedp));
 	schedp.sched_priority = par->priority;
@@ -112,7 +113,10 @@ void *semathread(void *param)
 				int tracing_enabled =
 				    open(tracing_enabled_file, O_WRONLY);
 				if (tracing_enabled >= 0) {
-					write(tracing_enabled, "0", 1);
+					ret = write(tracing_enabled, "0", 1);
+					if (ret < 0)
+						fatal("Could not write to %s: %s\n",
+						      tracing_enabled_file, strerror(errno));
 					close(tracing_enabled);
 				} else
 					fatal("Could not access %s\n",
-- 
2.48.1