swapon: check writing to a file descriptor was successful

Signed-off-by: Sami Kerola <kerolasa@iki.fi>

diff --git a/sys-utils/swapon.c b/sys-utils/swapon.c
index d5b7e378964d03fc9d30175c5a3c334307733ca7..f1e2433755a10a884470059b3a89aec7a8e6cfe2 100644 (file)
--- a/sys-utils/swapon.c
+++ b/sys-utils/swapon.c
@@ -323,7 +323,10 @@ static int swap_rewrite_signature(const char *devname, unsigned int pagesize)
 
        rc  = 0;
 err:
-       close(fd);
+       if (close_fd(fd) != 0) {
+               warn(_("write failed: %s"), devname);
+               rc = -1;
+       }
        return rc;
 }