[libvirt] [PATCH] lib: Don't use virReportSystemError() if virCommandRun() fails

[Michal Privoznik]

Firstly, virCommandRun() does report an error on failure (which
in most cases is more accurate than what we overwrite it with).
Secondly, usually errno is not set (or gets overwritten in the
cleanup code) which makes virReportSystemError() report useless
error messages. Drop all virReportSystemError() calls in cases
like this (I've found three occurrences).

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---

I was under impression that I've sent this one earlier. Well, maybe I
did not.

 src/storage/storage_backend_fs.c |  7 +------
 src/util/virdnsmasq.c            | 10 ++--------
 2 files changed, 3 insertions(+), 14 deletions(-)

diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index 97148acebe..ae4e9a03a3 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -425,13 +425,8 @@ virStorageBackendExecuteMKFS(const char *device,
 
     virCommandAddArg(cmd, device);
 
-    if (virCommandRun(cmd, NULL) < 0) {
-        virReportSystemError(errno,
-                             _("Failed to make filesystem of "
-                               "type '%s' on device '%s'"),
-                             format, device);
+    if (virCommandRun(cmd, NULL) < 0)
         return -1;
-    }
 
     return 0;
 }
diff --git a/src/util/virdnsmasq.c b/src/util/virdnsmasq.c
index 550f3179ae..42f62682c4 100644
--- a/src/util/virdnsmasq.c
+++ b/src/util/virdnsmasq.c
@@ -751,22 +751,16 @@ dnsmasqCapsRefreshInternal(dnsmasqCapsPtr caps, bool force)
     virCommandSetOutputBuffer(cmd, &version);
     virCommandAddEnvPassCommon(cmd);
     virCommandClearCaps(cmd);
-    if (virCommandRun(cmd, NULL) < 0) {
-        virReportSystemError(errno, _("failed to run '%s --version': %s"),
-                             caps->binaryPath, version);
+    if (virCommandRun(cmd, NULL) < 0)
         goto cleanup;
-    }
     virCommandFree(cmd);
 
     cmd = virCommandNewArgList(caps->binaryPath, "--help", NULL);
     virCommandSetOutputBuffer(cmd, &help);
     virCommandAddEnvPassCommon(cmd);
     virCommandClearCaps(cmd);
-    if (virCommandRun(cmd, NULL) < 0) {
-        virReportSystemError(errno, _("failed to run '%s --help': %s"),
-                             caps->binaryPath, help);
+    if (virCommandRun(cmd, NULL) < 0)
         goto cleanup;
-    }
 
     if (virAsprintf(&complete, "%s\n%s", version, help) < 0)
         goto cleanup;
-- 
2.21.0