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[libvirt] [PATCH 12/12] storage_conf: Use uid_t/gid_t instead of int to cast the value



And error out if the casted value is not same with the original
one, which prevents the bug on platform(s) where uid_t/gid_t
has different size with long.
---
 src/conf/storage_conf.c | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
index a62629e..a648c6d 100644
--- a/src/conf/storage_conf.c
+++ b/src/conf/storage_conf.c
@@ -747,7 +747,7 @@ virStorageDefParsePerms(xmlXPathContextPtr ctxt,
                         int defaultmode)
 {
     char *mode;
-    long v;
+    long val;
     int ret = -1;
     xmlNodePtr relnode;
     xmlNodePtr node;
@@ -784,23 +784,26 @@ virStorageDefParsePerms(xmlXPathContextPtr ctxt,
     if (virXPathNode("./owner", ctxt) == NULL) {
         perms->uid = (uid_t) -1;
     } else {
-        if (virXPathLong("number(./owner)", ctxt, &v) < 0) {
+        if (virXPathLong("number(./owner)", ctxt, &val) < 0 ||
+            (uid_t)val != val) {
             virReportError(VIR_ERR_XML_ERROR, "%s",
                            _("malformed owner element"));
             goto error;
         }
-        perms->uid = (int)v;
+
+        perms->uid = (uid_t)val;
     }
 
     if (virXPathNode("./group", ctxt) == NULL) {
         perms->gid = (gid_t) -1;
     } else {
-        if (virXPathLong("number(./group)", ctxt, &v) < 0) {
+        if (virXPathLong("number(./group)", ctxt, &val) < 0 ||
+            (gid_t)val != val) {
             virReportError(VIR_ERR_XML_ERROR, "%s",
                            _("malformed group element"));
             goto error;
         }
-        perms->gid = (int)v;
+        perms->gid = (gid_t)val;
     }
 
     /* NB, we're ignoring missing labels here - they'll simply inherit */
-- 
1.8.1.4


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