[libvirt] [PATCH 1/2] Report errors in virNodeCountThreadSiblings

[Ján Tomko]

Use virFileReadAll which reports an error when the file is larger
than the specified maximum.

https://bugzilla.redhat.com/show_bug.cgi?id=1207849
---
 src/nodeinfo.c | 22 ++++------------------
 1 file changed, 4 insertions(+), 18 deletions(-)

diff --git a/src/nodeinfo.c b/src/nodeinfo.c
index 29f1aa7..9db3233 100644
--- a/src/nodeinfo.c
+++ b/src/nodeinfo.c
@@ -344,7 +344,6 @@ virNodeCountThreadSiblings(const char *dir, unsigned int cpu)
 {
     unsigned long ret = 0;
     char *path;
-    FILE *pathfp;
     char *str = NULL;
     size_t i;
 
@@ -352,27 +351,16 @@ virNodeCountThreadSiblings(const char *dir, unsigned int cpu)
                     dir, cpu) < 0)
         return 0;
 
-    pathfp = fopen(path, "r");
-    if (pathfp == NULL) {
+    if (!virFileExists(path)) {
         /* If file doesn't exist, then pretend our only
          * sibling is ourself */
-        if (errno == ENOENT) {
-            VIR_FREE(path);
-            return 1;
-        }
-        virReportSystemError(errno, _("cannot open %s"), path);
-        VIR_FREE(path);
-        return 0;
+        ret = 1;
+        goto cleanup;
     }
 
-    if (VIR_ALLOC_N(str, SYSFS_THREAD_SIBLINGS_LIST_LENGTH_MAX) < 0)
+    if (virFileReadAll(path, SYSFS_THREAD_SIBLINGS_LIST_LENGTH_MAX, &str) < 0)
         goto cleanup;
 
-    if (fgets(str, SYSFS_THREAD_SIBLINGS_LIST_LENGTH_MAX, pathfp) == NULL) {
-        virReportSystemError(errno, _("cannot read from %s"), path);
-        goto cleanup;
-    }
-
     i = 0;
     while (str[i] != '\0') {
         if (c_isdigit(str[i]))
@@ -386,9 +374,7 @@ virNodeCountThreadSiblings(const char *dir, unsigned int cpu)
 
  cleanup:
     VIR_FREE(str);
-    VIR_FORCE_FCLOSE(pathfp);
     VIR_FREE(path);
-
     return ret;
 }
 
-- 
2.3.6