On RHEL 5, with libxml2-2.6.26, the build failed with: virsh.c: In function 'vshNodeIsSuperset': virsh.c:11951: warning: implicit declaration of function 'xmlChildElementCount' (or if warnings aren't errors, a link failure later on). * src/util/xml.h (virXMLChildElementCount): New prototype. * src/util/xml.c (virXMLChildElementCount): New function. * src/libvirt_private.syms (xml.h): Export it. * tools/virsh.c (vshNodeIsSuperset): Use it. --- I haven't decided yet whether this is trivial enough to push under the build-breaker rule, but it did fix my build on RHEL 5. src/libvirt_private.syms | 1 + src/util/xml.c | 20 ++++++++++++++++++++ src/util/xml.h | 1 + tools/virsh.c | 9 +++++---- 4 files changed, 27 insertions(+), 4 deletions(-) diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 99a1099..a81c230 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1400,6 +1400,7 @@ virTimeStringThenRaw; # xml.h +virXMLChildElementCount; virXMLParseHelper; virXMLPropString; virXMLSaveFile; diff --git a/src/util/xml.c b/src/util/xml.c index 4e98b05..2909e85 100644 --- a/src/util/xml.c +++ b/src/util/xml.c @@ -833,3 +833,23 @@ virXMLSaveFile(const char *path, return virFileRewrite(path, S_IRUSR | S_IWUSR, virXMLRewriteFile, &data); } + +/* Returns the number of children of node, or -1 on error. */ +long +virXMLChildElementCount(xmlNodePtr node) +{ + long ret = 0; + xmlNodePtr cur = NULL; + + /* xmlChildElementCount returns 0 on error, which isn't helpful; + * besides, it is not available in libxml2 2.6. */ + if (!node || node->type != XML_ELEMENT_NODE) + return -1; + cur = node->children; + while (cur) { + if (cur->type == XML_ELEMENT_NODE) + ret++; + cur = cur->next; + } + return ret; +} diff --git a/src/util/xml.h b/src/util/xml.h index c492063..a3750fa 100644 --- a/src/util/xml.h +++ b/src/util/xml.h @@ -52,6 +52,7 @@ int virXPathNodeSet(const char *xpath, xmlNodePtr **list); char * virXMLPropString(xmlNodePtr node, const char *name); +long virXMLChildElementCount(xmlNodePtr node); /* Internal function; prefer the macros below. */ xmlDocPtr virXMLParseHelper(int domcode, diff --git a/tools/virsh.c b/tools/virsh.c index d02be5c..a51478f 100644 --- a/tools/virsh.c +++ b/tools/virsh.c @@ -11919,7 +11919,7 @@ vshNodeIsSuperset(xmlNodePtr n1, xmlNodePtr n2) bool found; bool visited; bool ret = false; - unsigned long n1_child_size, n2_child_size, n1_iter; + long n1_child_size, n2_child_size, n1_iter; virBitmapPtr bitmap; if (!n1 && !n2) @@ -11948,9 +11948,10 @@ vshNodeIsSuperset(xmlNodePtr n1, xmlNodePtr n2) attr = attr->next; } - n1_child_size = xmlChildElementCount(n1); - n2_child_size = xmlChildElementCount(n2); - if (n1_child_size < n2_child_size) + n1_child_size = virXMLChildElementCount(n1); + n2_child_size = virXMLChildElementCount(n2); + if (n1_child_size < 0 || n2_child_size < 0 || + n1_child_size < n2_child_size) return false; if (n1_child_size == 0 && n2_child_size == 0) -- 1.7.7.3