swaplabel: check writing to a file descriptor was successful

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

diff --git a/disk-utils/swaplabel.c b/disk-utils/swaplabel.c
index 3e3e78b16eaa72d00e617a9d24d621a39c463574..a5ccb7ec389caaedbf7e2ce794fc7b05653aae3c 100644 (file)
--- a/disk-utils/swaplabel.c
+++ b/disk-utils/swaplabel.c
@@ -145,7 +145,10 @@ static int change_info(const char *devname, const char *label, const char *uuid)
                }
        }
 
-       close(fd);
+       if (close_fd(fd) != 0) {
+               warn(_("write failed: %s"), devname);
+               return -1;
+       }
        return 0;
 err:
        if (fd >= 0)