Retry ruleset dump when kernel returns EAGAIN.

Bugzilla #104

1 files changed, 4 insertions, 1 deletions

diff --git a/libiptc/libiptc.c b/libiptc/libiptc.c
index b7bf785c..277ca0f2 100644
--- a/libiptc/libiptc.c
+++ b/libiptc/libiptc.c
@@ -1219,21 +1219,21 @@ TC_INIT(const char *tablename)
 		errno = EINVAL;
 		return NULL;
 	}
 	
 	if (sockfd_use == 0) {
 		sockfd = socket(TC_AF, SOCK_RAW, IPPROTO_RAW);
 		if (sockfd < 0)
 			return NULL;
 	}
 	sockfd_use++;
-
+retry:
 	s = sizeof(info);
 
 	strcpy(info.name, tablename);
 	if (getsockopt(sockfd, TC_IPPROTO, SO_GET_INFO, &info, &s) < 0) {
 		if (--sockfd_use == 0) {
 			close(sockfd);
 			sockfd = -1;
 		}
 		return NULL;
 	}
@@ -1272,20 +1272,23 @@ TC_INIT(const char *tablename)
 	}
 #endif
 
 	if (parse_table(h) < 0)
 		goto error;
 
 	CHECK(h);
 	return h;
 error:
 	TC_FREE(&h);
+	/* A different process changed the ruleset size, retry */
+	if (errno == EAGAIN)
+		goto retry;
 	return NULL;
 }
 
 void
 TC_FREE(TC_HANDLE_T *h)
 {
 	struct chain_head *c, *tmp;
 
 	iptc_fn = TC_FREE;
 	if (--sockfd_use == 0) {