Re: Clean up some signal usage mainly related to Windows

On Wed, Dec 06, 2023 at 10:23:52AM +0100, Peter Eisentraut wrote:
> Ok, I have committed your 0001 patch.

My compiler is unhappy about this one:

../postgresql/src/bin/pg_test_fsync/pg_test_fsync.c:605:2: error: ignoring return value of ‘write’, declared with attribute warn_unused_result [-Werror=unused-result]
  605 |  write(STDOUT_FILENO, "\n", 1);
      |  ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

I think we need to do something like the following, which is similar to
what was done in aa90e148ca7, 27314d32a88, and 6c72a28e5ce.

diff --git a/src/bin/pg_test_fsync/pg_test_fsync.c b/src/bin/pg_test_fsync/pg_test_fsync.c
index f109aa5717..0684f4bc54 100644
--- a/src/bin/pg_test_fsync/pg_test_fsync.c
+++ b/src/bin/pg_test_fsync/pg_test_fsync.c
@@ -598,11 +598,14 @@ test_non_sync(void)
 static void
 signal_cleanup(SIGNAL_ARGS)
 {
+    int         rc;
+
     /* Delete the file if it exists. Ignore errors */
     if (needs_unlink)
         unlink(filename);
     /* Finish incomplete line on stdout */
-    write(STDOUT_FILENO, "\n", 1);
+    rc = write(STDOUT_FILENO, "\n", 1);
+    (void) rc;
     _exit(1);
 }

-- 
Nathan Bossart
Amazon Web Services: https://aws.amazon.com