[Libvirt-cim] [PATCH] When saving out the infostore, clear any previous data

[Kaitlin Rupert]

# HG changeset patch
# User Kaitlin Rupert <karupert at us.ibm.com>
# Date 1217613773 25200
# Node ID a9e3b40692cef1635f1c377f896fc2d5be0b3c16
# Parent  d7406e2f4670208cfe61ef9c0065164292ab3942
When saving out the infostore, clear any previous data.

Signed-off-by: Kaitlin Rupert <karupert at us.ibm.com>

diff -r d7406e2f4670 -r a9e3b40692ce libxkutil/infostore.c
--- a/libxkutil/infostore.c	Tue Jul 29 12:34:38 2008 -0700
+++ b/libxkutil/infostore.c	Fri Aug 01 11:02:53 2008 -0700
@@ -24,6 +24,7 @@
 #include <unistd.h>
 #include <inttypes.h>
 #include <sys/file.h>
+#include <string.h>
 
 #include <libvirt/libvirt.h>
 #include <libxml/parser.h>
@@ -42,6 +43,7 @@
         xmlNodePtr root;
         xmlXPathContextPtr xpathctx;
         int fd;
+        char *filename;
 };
 
 static void infostore_cleanup_ctx(struct infostore_ctx *ctx)
@@ -49,6 +51,7 @@
         xmlXPathFreeContext(ctx->xpathctx);
         xmlFreeDoc(ctx->doc);
         close(ctx->fd);
+        free(ctx->filename);
 
         free(ctx);
 }
@@ -148,7 +151,12 @@
         xmlSaveCtxtPtr save = NULL;
         long size = 0;
 
-        lseek(ctx->fd, 0, SEEK_SET);
+        close(ctx->fd);
+        ctx->fd = open(ctx->filename, O_RDWR|O_TRUNC, 0600);
+        if (ctx->fd < 0) {
+                CU_DEBUG("Unable to open `%s': %m", ctx->filename);
+                goto out;
+        }
 
         save = xmlSaveToFd(ctx->fd, NULL, 0);
         if (save == NULL) {
@@ -179,6 +187,8 @@
         filename = make_filename(dom);
         if (filename == NULL)
                 goto err;
+
+        isc->filename = strdup(filename);
 
         isc->fd = open(filename, O_RDWR|O_CREAT, 0600);
         if (isc->fd < 0) {
@@ -310,6 +320,7 @@
         }
 
         xmlNodeSetContent(node, BAD_CAST val);
+
  out:
         xmlXPathFreeObject(result);