src: get rid of printf

This patch introduces nft_print()/nft_gmp_print() functions which have
to be used instead of printf to output information that were previously
send to stdout. These functions print to a FILE pointer defined in
struct output_ctx. It is set by calling:

| old_fp = nft_ctx_set_output(ctx, new_fp);

Having an application-defined FILE pointer is actually quite flexible:
Using fmemopen() or even fopencookie(), an application gains full
control over what is printed and where it should go to.

Signed-off-by: Eric Leblond <eric@regit.org>
Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 5 insertions, 5 deletions

diff --git a/src/hash.c b/src/hash.c
index 1a4bfb30..9cd3c8cf 100644
--- a/src/hash.c
+++ b/src/hash.c
@@ -19,19 +19,19 @@ static void hash_expr_print(const struct expr *expr, struct output_ctx *octx)
 {
 	switch (expr->hash.type) {
 	case NFT_HASH_SYM:
-		printf("symhash");
+		nft_print(octx, "symhash");
 	break;
 	case NFT_HASH_JENKINS:
 	default:
-		printf("jhash ");
+		nft_print(octx, "jhash ");
 		expr_print(expr->hash.expr, octx);
 	}
 
-	printf(" mod %u", expr->hash.mod);
+	nft_print(octx, " mod %u", expr->hash.mod);
 	if (expr->hash.seed_set)
-		printf(" seed 0x%x", expr->hash.seed);
+		nft_print(octx, " seed 0x%x", expr->hash.seed);
 	if (expr->hash.offset)
-		printf(" offset %u", expr->hash.offset);
+		nft_print(octx, " offset %u", expr->hash.offset);
 }
 
 static bool hash_expr_cmp(const struct expr *e1, const struct expr *e2)