libxt_u32: enclose argument in quotes

Otherwise ip6tables-save piped to ip6tables-restore can cause a parse
error when the expression list is empty.

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

diff --git a/extensions/libxt_u32.c b/extensions/libxt_u32.c
index 054a5b240e01428a523f3f1bdd40bfa397ed7a06..378de0c96b731fb756fd6e0796e6b444933b762c 100644 (file)
--- a/extensions/libxt_u32.c
+++ b/extensions/libxt_u32.c
@@ -45,6 +45,7 @@ static void u32_dump(const struct xt_u32 *data)
        const struct xt_u32_test *ct;
        unsigned int testind, i;
 
+       putchar('\"');
        for (testind = 0; testind < data->ntests; ++testind) {
                ct = &data->tests[testind];
 
@@ -81,7 +82,7 @@ static void u32_dump(const struct xt_u32 *data)
                                       ct->value[i].max);
                }
        }
-       printf(" ");
+       printf("\" ");
 }
 
 /* string_to_number() is not quite what we need here ... */