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[libvirt] [PATCH 3/4] storage: cast -1 for uid_t|gid_t



uid_t and gid_t are opaque types, ranging from s32 to u32 to u64.

Explicitly cast the magic -1 to the appropriate type.

Signed-off-by: Philipp Hahn <hahn univention de>
---
 src/conf/storage_conf.c       |    8 ++++----
 src/storage/storage_backend.c |   16 ++++++++--------
 src/util/virutil.c            |    2 +-
 3 files changed, 13 insertions(+), 13 deletions(-)

diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
index 7a39998..9134a22 100644
--- a/src/conf/storage_conf.c
+++ b/src/conf/storage_conf.c
@@ -674,8 +674,8 @@ virStorageDefParsePerms(xmlXPathContextPtr ctxt,
     if (node == NULL) {
         /* Set default values if there is not <permissions> element */
         perms->mode = defaultmode;
-        perms->uid = -1;
-        perms->gid = -1;
+        perms->uid = (uid_t) -1;
+        perms->gid = (gid_t) -1;
         perms->label = NULL;
         return 0;
     }
@@ -700,7 +700,7 @@ virStorageDefParsePerms(xmlXPathContextPtr ctxt,
     }
 
     if (virXPathNode("./owner", ctxt) == NULL) {
-        perms->uid = -1;
+        perms->uid = (uid_t) -1;
     } else {
         if (virXPathLong("number(./owner)", ctxt, &v) < 0) {
             virReportError(VIR_ERR_XML_ERROR,
@@ -711,7 +711,7 @@ virStorageDefParsePerms(xmlXPathContextPtr ctxt,
     }
 
     if (virXPathNode("./group", ctxt) == NULL) {
-        perms->gid = -1;
+        perms->gid = (gid_t) -1;
     } else {
         if (virXPathLong("number(./group)", ctxt, &v) < 0) {
             virReportError(VIR_ERR_XML_ERROR,
diff --git a/src/storage/storage_backend.c b/src/storage/storage_backend.c
index 964ce29..ec2fa53 100644
--- a/src/storage/storage_backend.c
+++ b/src/storage/storage_backend.c
@@ -277,9 +277,9 @@ virStorageBackendCreateBlockFrom(virConnectPtr conn ATTRIBUTE_UNUSED,
                              vol->target.path);
         goto cleanup;
     }
-    uid = (vol->target.perms.uid != st.st_uid) ? vol->target.perms.uid : -1;
-    gid = (vol->target.perms.gid != st.st_gid) ? vol->target.perms.gid : -1;
-    if (((uid != -1) || (gid != -1))
+    uid = (vol->target.perms.uid != st.st_uid) ? vol->target.perms.uid : (uid_t) -1;
+    gid = (vol->target.perms.gid != st.st_gid) ? vol->target.perms.gid : (gid_t) -1;
+    if (((uid != (uid_t) -1) || (gid != (gid_t) -1))
         && (fchown(fd, uid, gid) < 0)) {
         virReportSystemError(errno,
                              _("cannot chown '%s' to (%u, %u)"),
@@ -542,9 +542,9 @@ static int virStorageBackendCreateExecCommand(virStoragePoolObjPtr pool,
 
     if ((pool->def->type == VIR_STORAGE_POOL_NETFS)
         && (((getuid() == 0)
-             && (vol->target.perms.uid != -1)
+             && (vol->target.perms.uid != (uid_t) -1)
              && (vol->target.perms.uid != 0))
-            || ((vol->target.perms.gid != -1)
+            || ((vol->target.perms.gid != (gid_t) -1)
                 && (vol->target.perms.gid != getgid())))) {
 
         virCommandSetUID(cmd, vol->target.perms.uid);
@@ -572,9 +572,9 @@ static int virStorageBackendCreateExecCommand(virStoragePoolObjPtr pool,
         }
     }
 
-    uid = (vol->target.perms.uid != st.st_uid) ? vol->target.perms.uid : -1;
-    gid = (vol->target.perms.gid != st.st_gid) ? vol->target.perms.gid : -1;
-    if (((uid != -1) || (gid != -1))
+    uid = (vol->target.perms.uid != st.st_uid) ? vol->target.perms.uid : (uid_t) -1;
+    gid = (vol->target.perms.gid != st.st_gid) ? vol->target.perms.gid : (gid_t) -1;
+    if (((uid != (uid_t) -1) || (gid != (gid_t) -1))
         && (chown(vol->target.path, uid, gid) < 0)) {
         virReportSystemError(errno,
                              _("cannot chown %s to (%u, %u)"),
diff --git a/src/util/virutil.c b/src/util/virutil.c
index 563f684..4af2599 100644
--- a/src/util/virutil.c
+++ b/src/util/virutil.c
@@ -1206,7 +1206,7 @@ parenterror:
                              _("stat of '%s' failed"), path);
         goto childerror;
     }
-    if ((st.st_gid != gid) && (chown(path, -1, gid) < 0)) {
+    if ((st.st_gid != gid) && (chown(path, (uid_t) -1, gid) < 0)) {
         ret = -errno;
         virReportSystemError(errno,
                              _("cannot chown '%s' to group %u"),
-- 
1.7.10.4


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