[libvirt] [PATCH v2 1/4] util: Add exitstatus parameter to virCommandRunRegex

[John Ferlan]

Rather than have virCommandRun just spit out the error, allow callers
to decide to pass the exitstatus so the caller can make intelligent
decisions based on the error.

Signed-off-by: John Ferlan <jferlan at redhat.com>
---
 src/storage/storage_backend_fs.c      |  2 +-
 src/storage/storage_backend_logical.c | 10 ++++++----
 src/util/vircommand.c                 |  9 ++++++---
 src/util/vircommand.h                 |  3 ++-
 src/util/viriscsi.c                   |  4 ++--
 5 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/src/storage/storage_backend_fs.c b/src/storage/storage_backend_fs.c
index 02a129e..45474cb 100644
--- a/src/storage/storage_backend_fs.c
+++ b/src/storage/storage_backend_fs.c
@@ -267,7 +267,7 @@ virStorageBackendFileSystemNetFindNFSPoolSources(virNetfsDiscoverState *state)
 
     if (virCommandRunRegex(cmd, 1, regexes, vars,
                            virStorageBackendFileSystemNetFindPoolSourcesFunc,
-                           state, NULL) < 0)
+                           state, NULL, NULL) < 0)
         goto cleanup;
 
     ret = 0;
diff --git a/src/storage/storage_backend_logical.c b/src/storage/storage_backend_logical.c
index 90a194e..ca05fe1 100644
--- a/src/storage/storage_backend_logical.c
+++ b/src/storage/storage_backend_logical.c
@@ -398,7 +398,8 @@ virStorageBackendLogicalFindLVs(virStoragePoolObjPtr pool,
                            vars,
                            virStorageBackendLogicalMakeVol,
                            &cbdata,
-                           "lvs") < 0)
+                           "lvs",
+                           NULL) < 0)
         goto cleanup;
 
     ret = 0;
@@ -511,10 +512,10 @@ virStorageBackendLogicalGetPoolSources(virStoragePoolSourceListPtr sourceList)
     cmd = virCommandNewArgList(PVS,
                                "--noheadings",
                                "-o", "pv_name,vg_name",
-                               NULL);
+                               NULL, NULL);
     if (virCommandRunRegex(cmd, 1, regexes, vars,
                            virStorageBackendLogicalFindPoolSourcesFunc,
-                           sourceList, "pvs") < 0)
+                           sourceList, "pvs", NULL) < 0)
         goto cleanup;
     ret = 0;
 
@@ -799,7 +800,8 @@ virStorageBackendLogicalRefreshPool(virConnectPtr conn ATTRIBUTE_UNUSED,
                            vars,
                            virStorageBackendLogicalRefreshPoolFunc,
                            pool,
-                           "vgs") < 0)
+                           "vgs",
+                           NULL) < 0)
         goto cleanup;
 
     ret = 0;
diff --git a/src/util/vircommand.c b/src/util/vircommand.c
index 027cb64..f5bd7af 100644
--- a/src/util/vircommand.c
+++ b/src/util/vircommand.c
@@ -2900,6 +2900,7 @@ virCommandSetDryRun(virBufferPtr buf,
  * needs to return 0 on success
  * @data: additional data that will be passed to the callback function
  * @prefix: prefix that will be skipped at the beginning of each line
+ * @exitstatus: allows the caller to handle command run exit failures
  *
  * Run an external program.
  *
@@ -2917,7 +2918,8 @@ virCommandRunRegex(virCommandPtr cmd,
                    int *nvars,
                    virCommandRunRegexFunc func,
                    void *data,
-                   const char *prefix)
+                   const char *prefix,
+                   int *exitstatus)
 {
     int err;
     regex_t *reg;
@@ -2959,7 +2961,7 @@ virCommandRunRegex(virCommandPtr cmd,
         goto cleanup;
 
     virCommandSetOutputBuffer(cmd, &outbuf);
-    if (virCommandRun(cmd, NULL) < 0)
+    if (virCommandRun(cmd, exitstatus) < 0)
         goto cleanup;
 
     if (!outbuf) {
@@ -3114,7 +3116,8 @@ virCommandRunRegex(virCommandPtr cmd ATTRIBUTE_UNUSED,
                    int *nvars ATTRIBUTE_UNUSED,
                    virCommandRunRegexFunc func ATTRIBUTE_UNUSED,
                    void *data ATTRIBUTE_UNUSED,
-                   const char *prefix ATTRIBUTE_UNUSED)
+                   const char *prefix ATTRIBUTE_UNUSED,
+                   int *exitstatus ATTRIBUTE_UNUSED)
 {
     virReportError(VIR_ERR_INTERNAL_ERROR,
                    _("%s not implemented on Win32"), __FUNCTION__);
diff --git a/src/util/vircommand.h b/src/util/vircommand.h
index 198da2f..44818ef 100644
--- a/src/util/vircommand.h
+++ b/src/util/vircommand.h
@@ -205,7 +205,8 @@ int virCommandRunRegex(virCommandPtr cmd,
                        int *nvars,
                        virCommandRunRegexFunc func,
                        void *data,
-                       const char *cmd_to_ignore);
+                       const char *cmd_to_ignore,
+                       int *exitstatus);
 
 int virCommandRunNul(virCommandPtr cmd,
                      size_t n_columns,
diff --git a/src/util/viriscsi.c b/src/util/viriscsi.c
index bd34fea..846ea68 100644
--- a/src/util/viriscsi.c
+++ b/src/util/viriscsi.c
@@ -87,7 +87,7 @@ virISCSIGetSession(const char *devpath,
                            regexes,
                            vars,
                            virISCSIExtractSession,
-                           &cbdata, NULL) < 0)
+                           &cbdata, NULL, NULL) < 0)
         goto cleanup;
 
     if (cbdata.session == NULL && !probe) {
@@ -437,7 +437,7 @@ virISCSIScanTargets(const char *portal,
                            regexes,
                            vars,
                            virISCSIGetTargets,
-                           &list, NULL) < 0)
+                           &list, NULL, NULL) < 0)
         goto cleanup;
 
     for (i = 0; i < list.ntargets; i++) {
-- 
2.5.5