From: Gerrit Renker <grenker@cscs.ch>
Date: Thu, 25 Feb 2010 16:05:45 +0000 (+0100)
Subject: 09_fix-errno-usage.diff
X-Git-Tag: v0.4.2~36
X-Git-Url: http://git.tuebingen.mpg.de/?p=paraslash.git;a=commitdiff_plain;h=818d1a3aa98121ec2d5339d11dece7bc2f5aa6af

09_fix-errno-usage.diff

This fixes a bug in the use of errno which corresponds to the 'common mistake'
in the use of errno(3): to not save it before making new system calls. Thanks.
---

diff --git a/net.c b/net.c
index d9b3a9de..aeeca20e 100644
--- a/net.c
+++ b/net.c
@@ -457,10 +457,11 @@ get_next_src:
 	flowopt_cleanup(fo);
 
 	if (src == NULL && dst == NULL) {
+		rc = errno;
 		PARA_ERROR_LOG("can not create %s socket %s#%s.\n",
 			layer4_name(l4type), host? host : (passive?
 			"[loopback]" : "[localhost]"), port);
-		return -ERRNO_TO_PARA_ERROR(errno);
+		return -ERRNO_TO_PARA_ERROR(rc);
 	}
 	return sockfd;
 }
@@ -491,8 +492,9 @@ int para_listen(unsigned l4type, uint16_t port, struct flowopts *fo)
 	if (fd > 0) {
 		ret = listen(fd, BACKLOG);
 		if (ret < 0) {
+			ret = errno;
 			close(fd);
-			return -ERRNO_TO_PARA_ERROR(errno);
+			return -ERRNO_TO_PARA_ERROR(ret);
 		}
 		PARA_INFO_LOG("listening on %s port %u, fd %d\n",
 			layer4_name(l4type), port, fd);