From b0bdcd94d922a2bdbe6288b1f68efe15ed70d563 Mon Sep 17 00:00:00 2001
From: Rusty Russell <rusty@rustcorp.com.au>
Date: Fri, 21 Jan 2011 14:11:16 +1030
Subject: [PATCH] lca2011: simpler testing by not having oserver_setup exit.

Note the use of close_noerr here to preserve the errno.
---
 ccan/oserver/_info     |  3 +++
 ccan/oserver/oserver.c | 15 ++++++++++-----
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/ccan/oserver/_info b/ccan/oserver/_info
index b906502..a9c74fc 100644
--- a/ccan/oserver/_info
+++ b/ccan/oserver/_info
@@ -20,6 +20,8 @@
  *		int fd, sockfd;
  *
  *		sockfd = oserver_setup();
+ *		if (sockfd < 0)
+ *			err(1, "Failed to set up server socket");
  *
  *		fd = accept(sockfd, NULL, NULL);
  *		if (fd < 0)
@@ -40,6 +42,7 @@ int main(int argc, char *argv[])
 		printf("ccan/read_write_all\n");
 		printf("ccan/str\n");
 		printf("ccan/foreach\n");
+		printf("ccan/noerr\n");
 		return 0;
 	}
 
diff --git a/ccan/oserver/oserver.c b/ccan/oserver/oserver.c
index 5f120cb..b7495f3 100644
--- a/ccan/oserver/oserver.c
+++ b/ccan/oserver/oserver.c
@@ -1,5 +1,6 @@
 #include <ccan/oserver/oserver.h>
 #include <ccan/read_write_all/read_write_all.h>
+#include <ccan/noerr/noerr.h>
 #include <sys/types.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
@@ -47,7 +48,7 @@ int oserver_setup(void)
 
 	sockfd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
 	if (sockfd < 0)
-		err(1, "Creating TCP socket");
+		return -1;
 
 	if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)))
 		warn("Setting socket reuse");
@@ -55,10 +56,14 @@ int oserver_setup(void)
 	u.in.sin_family = AF_INET;
 	u.in.sin_port = htons(OSERVER_PORT);
 	u.in.sin_addr.s_addr = INADDR_ANY;
-	if (bind(sockfd, &u.addr, sizeof(u.in)) == -1)
-		err(1, "Binding TCP socket");
+	if (bind(sockfd, &u.addr, sizeof(u.in)) == -1) {
+		close_noerr(sockfd);
+		return -1;
+	}
 
-	if (listen(sockfd, 0) != 0)
-		err(1, "Listening on TCP socket");
+	if (listen(sockfd, 0) != 0) {
+		close_noerr(sockfd);
+		return -1;
+	}
 	return sockfd;
 }
-- 
2.39.2