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util: fix the VIR_STRDUP when src is NULL

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When src is NULL, VIR_STRDUP will return 0 directly.
This patch will set dest to NULL before VIR_STRDUP return.

Example:
[root@yds-pc libvirt]# virsh
Welcome to virsh, the virtualization interactive terminal.

Type: 'help' for help with commands
'quit' to quit

virsh # connect
error: Failed to connect to the hypervisor
error: internal error Unable to parse URI �N�*

Signed-off-by: yangdongsheng <yangds.fnst@cn.fujitsu.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
yangdongsheng 2013-05-28 15:13:17 +08:00 committed by Eric Blake
parent c6f2523fb1
commit 2da3bc646e
1 changed files with 3 additions and 1 deletions
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4
src/util/virstring.c
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@ -1,5 +1,5 @@
/*
* Copyright (C) 2012 Red Hat, Inc.
* Copyright (C) 2012-2013 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
@ -540,6 +540,7 @@ virStrdup(char **dest,
const char *funcname,
size_t linenr)
{
*dest = NULL;
if (!src)
return 0;
if (!(*dest = strdup(src))) {
@ -583,6 +584,7 @@ virStrndup(char **dest,
const char *funcname,
size_t linenr)
{
*dest = NULL;
if (!src)
return 0;
if (n < 0)