Merge pull request #1746 from rubenk/swrite-check-for-open-fd

swrite: return error if fd is negative

diff --git a/src/apcups.c b/src/apcups.c
index 2d1c16b..9f7476b 100644 (file)
--- a/src/apcups.c
+++ b/src/apcups.c
@@ -89,7 +89,7 @@ static int net_shutdown (int *fd)
        if ((fd == NULL) || (*fd < 0))
                return (EINVAL);
 
-       swrite (*fd, (void *) &packet_size, sizeof (packet_size));
+       (void)swrite (*fd, (void *) &packet_size, sizeof (packet_size));
        close (*fd);
        *fd = -1;