always unlink temporary file before creating new one

diff --git a/udev_node.c b/udev_node.c
index 9e09e58ba8d574df0d9fd8ac1cfb1454ea4979dc..fcd52d0e45d5d9b861a353267bfbf5c56d64f64c 100644 (file)
--- a/udev_node.c
+++ b/udev_node.c
@@ -63,6 +63,7 @@ int udev_node_mknod(struct udevice *udev, const char *file, dev_t devt, mode_t m
        info("atomically replace '%s'", file);
        strlcpy(file_tmp, file, sizeof(file_tmp));
        strlcat(file_tmp, TMP_FILE_EXT, sizeof(file_tmp));
        info("atomically replace '%s'", file);
        strlcpy(file_tmp, file, sizeof(file_tmp));
        strlcat(file_tmp, TMP_FILE_EXT, sizeof(file_tmp));

+       unlink(file_tmp);

        selinux_setfscreatecon(file_tmp, udev->dev->kernel, mode);
        retval = mknod(file_tmp, mode, devt);
        selinux_resetfscreatecon();
        selinux_setfscreatecon(file_tmp, udev->dev->kernel, mode);
        retval = mknod(file_tmp, mode, devt);
        selinux_resetfscreatecon();


@@ -162,6 +163,7 @@ static int node_symlink(const char *node, const char *slink)
        info("atomically replace '%s'", slink);
        strlcpy(slink_tmp, slink, sizeof(slink_tmp));
        strlcat(slink_tmp, TMP_FILE_EXT, sizeof(slink_tmp));
        info("atomically replace '%s'", slink);
        strlcpy(slink_tmp, slink, sizeof(slink_tmp));
        strlcat(slink_tmp, TMP_FILE_EXT, sizeof(slink_tmp));

+       unlink(slink_tmp);

        selinux_setfscreatecon(slink_tmp, NULL, S_IFLNK);
        retval = symlink(target, slink_tmp);
        selinux_resetfscreatecon();
        selinux_setfscreatecon(slink_tmp, NULL, S_IFLNK);
        retval = symlink(target, slink_tmp);
        selinux_resetfscreatecon();