storage_backend: Fix error reporting with regex helper

Some clients overwrite the error from the regex helper, or do half-baked
error reporting with the exitstatus.

src/storage/storage_backend.c

@@ -1401,8 +1401,7 @@ virStorageBackendRunProgRegex(virStoragePoolObjPtr pool,
                               const char **regex,
                               int *nvars,
                               virStorageBackendListVolRegexFunc func,
-                              void *data,
+                              void *data)
-                              int *outexit)
 {
     int fd = -1, err, ret = -1;
     FILE *list = NULL;
@@ -1500,7 +1499,7 @@ virStorageBackendRunProgRegex(virStoragePoolObjPtr pool,
         }
     }
 
-    ret = virCommandWait(cmd, outexit);
+    ret = virCommandWait(cmd, NULL);
 cleanup:
     if (groups) {
         for (j = 0 ; j < totgroups ; j++)
@@ -1623,10 +1622,10 @@ virStorageBackendRunProgRegex(virConnectPtr conn,
                               const char **regex ATTRIBUTE_UNUSED,
                               int *nvars ATTRIBUTE_UNUSED,
                               virStorageBackendListVolRegexFunc func ATTRIBUTE_UNUSED,
-                              void *data ATTRIBUTE_UNUSED,
+                              void *data ATTRIBUTE_UNUSED)
-                              int *outexit ATTRIBUTE_UNUSED)
 {
-    virStorageReportError(VIR_ERR_INTERNAL_ERROR, _("%s not implemented on Win32"), __FUNCTION__);
+    virStorageReportError(VIR_ERR_INTERNAL_ERROR,
+                          _("%s not implemented on Win32"), __FUNCTION__);
     return -1;
 }
 

src/storage/storage_backend.h

@@ -135,8 +135,7 @@ int virStorageBackendRunProgRegex(virStoragePoolObjPtr pool,
                                   const char **regex,
                                   int *nvars,
                                   virStorageBackendListVolRegexFunc func,
-                                  void *data,
+                                  void *data);
-                                  int *exitstatus);
 
 int virStorageBackendRunProgNul(virStoragePoolObjPtr pool,
                                 const char **prog,

src/storage/storage_backend_fs.c

@@ -233,7 +233,6 @@ virStorageBackendFileSystemNetFindPoolSources(virConnectPtr conn ATTRIBUTE_UNUSE
     };
     const char *prog[] = { SHOWMOUNT, "--no-headers", "--exports", NULL, NULL };
     virStoragePoolSourcePtr source = NULL;
-    int exitstatus;
     char *retval = NULL;
     unsigned int i;
 
@@ -246,8 +245,8 @@ virStorageBackendFileSystemNetFindPoolSources(virConnectPtr conn ATTRIBUTE_UNUSE
     prog[3] = source->host.name;
 
     if (virStorageBackendRunProgRegex(NULL, prog, 1, regexes, vars,
-                                      virStorageBackendFileSystemNetFindPoolSourcesFunc,
+                            virStorageBackendFileSystemNetFindPoolSourcesFunc,
-                                      &state, &exitstatus) < 0)
+                            &state) < 0)
         goto cleanup;
 
     retval = virStoragePoolSourceListFormat(&state.list);

src/storage/storage_backend_iscsi.c

@@ -160,8 +160,7 @@ virStorageBackendISCSISession(virStoragePoolObjPtr pool,
                                       regexes,
                                       vars,
                                       virStorageBackendISCSIExtractSession,
-                                      &session,
+                                      &session) < 0)
-                                      NULL) < 0)
         return NULL;
 
     if (session == NULL &&
@@ -503,7 +502,6 @@ virStorageBackendISCSIScanTargets(const char *portal,
     };
     struct virStorageBackendISCSITargetList list;
     int i;
-    int exitstatus;
 
     memset(&list, 0, sizeof(list));
 
@@ -513,17 +511,7 @@ virStorageBackendISCSIScanTargets(const char *portal,
                                       regexes,
                                       vars,
                                       virStorageBackendISCSIGetTargets,
-                                      &list,
+                                      &list) < 0) {
-                                      &exitstatus) < 0) {
-        virStorageReportError(VIR_ERR_INTERNAL_ERROR,
-                              "%s", _("iscsiadm command failed"));
-                              return -1;
-    }
-
-    if (exitstatus != 0) {
-        virStorageReportError(VIR_ERR_INTERNAL_ERROR,
-                              _("iscsiadm sendtargets command failed with exitstatus %d"),
-                              exitstatus);
         return -1;
     }
 

src/storage/storage_backend_logical.c

@@ -205,25 +205,13 @@ virStorageBackendLogicalFindLVs(virStoragePoolObjPtr pool,
         pool->def->source.name, NULL
     };
 
-    int exitstatus;
-
     if (virStorageBackendRunProgRegex(pool,
                                       prog,
                                       1,
                                       regexes,
                                       vars,
                                       virStorageBackendLogicalMakeVol,
-                                      vol,
+                                      vol) < 0) {
-                                      &exitstatus) < 0) {
-        virStorageReportError(VIR_ERR_INTERNAL_ERROR,
-                              "%s", _("lvs command failed"));
-                              return -1;
-    }
-
-    if (exitstatus != 0) {
-        virStorageReportError(VIR_ERR_INTERNAL_ERROR,
-                              _("lvs command failed with exitstatus %d"),
-                              exitstatus);
         return -1;
     }
 
@@ -321,7 +309,6 @@ virStorageBackendLogicalFindPoolSources(virConnectPtr conn ATTRIBUTE_UNUSED,
     };
     const char *const prog[] = { PVS, "--noheadings", "-o", "pv_name,vg_name", NULL };
     const char *const scanprog[] = { VGSCAN, NULL };
-    int exitstatus;
     char *retval = NULL;
     virStoragePoolSourceList sourceList;
     int i;
@@ -331,7 +318,7 @@ virStorageBackendLogicalFindPoolSources(virConnectPtr conn ATTRIBUTE_UNUSED,
      * that might be hanging around, so if this fails for some reason, the
      * worst that happens is that scanning doesn't pick everything up
      */
-    if (virRun(scanprog, &exitstatus) < 0) {
+    if (virRun(scanprog, NULL) < 0) {
         VIR_WARN("Failure when running vgscan to refresh physical volumes");
     }
 
@@ -339,8 +326,8 @@ virStorageBackendLogicalFindPoolSources(virConnectPtr conn ATTRIBUTE_UNUSED,
     sourceList.type = VIR_STORAGE_POOL_LOGICAL;
 
     if (virStorageBackendRunProgRegex(NULL, prog, 1, regexes, vars,
-                                      virStorageBackendLogicalFindPoolSourcesFunc,
+                                virStorageBackendLogicalFindPoolSourcesFunc,
-                                      &sourceList, &exitstatus) < 0)
+                                &sourceList) < 0)
         return NULL;
 
     retval = virStoragePoolSourceListFormat(&sourceList);
@@ -489,7 +476,6 @@ virStorageBackendLogicalRefreshPool(virConnectPtr conn ATTRIBUTE_UNUSED,
         "--nosuffix", "--options", "vg_size,vg_free",
         pool->def->source.name, NULL
     };
-    int exitstatus;
 
     virFileWaitForDevices();
 
@@ -506,13 +492,7 @@ virStorageBackendLogicalRefreshPool(virConnectPtr conn ATTRIBUTE_UNUSED,
                                       regexes,
                                       vars,
                                       virStorageBackendLogicalRefreshPoolFunc,
-                                      NULL,
+                                      NULL) < 0) {
-                                      &exitstatus) < 0) {
-        virStoragePoolObjClearVols(pool);
-        return -1;
-    }
-
-    if (exitstatus != 0) {
         virStoragePoolObjClearVols(pool);
         return -1;
     }