[PATCH] selftests/proc: fix unused result warning during test compilation
From: Abhinav Jain
Date: Tue Jun 25 2024 - 11:26:08 EST
Check the return value from write function to get rid of the warning
during test compilation, shared below.
Tested by compiling after the change, the warning disappears.
proc-empty-vm.c:385:17: warning: ignoring return value of ‘write’
declared with attribute ‘warn_unused_result’ [-Wunused-result]
385 | write(1, buf, rv);
Signed-off-by: Abhinav Jain <jain.abhinav177@xxxxxxxxx>
---
tools/testing/selftests/proc/proc-empty-vm.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/proc/proc-empty-vm.c b/tools/testing/selftests/proc/proc-empty-vm.c
index 56198d4ca2bf..510ab4a5330a 100644
--- a/tools/testing/selftests/proc/proc-empty-vm.c
+++ b/tools/testing/selftests/proc/proc-empty-vm.c
@@ -382,7 +382,12 @@ static int test_proc_pid_statm(pid_t pid)
assert(rv >= 0);
assert(rv <= sizeof(buf));
if (0) {
- write(1, buf, rv);
+ ssize_t bytes_written = write(1, buf, rv);
+
+ if (bytes_written != rv) {
+ perror("write");
+ return EXIT_FAILURE;
+ }
}
const char *p = buf;
--
2.34.1