[libvirt] [PATCH] (absolutePathFromBaseFile): fix up preceding commit

[Jim Meyering]

To my chagrin, I saw that my most recent commit introduced
compilation errors.  Sorry about that.
Here's how I propose to fix it.

>From 2d948a373ecebec6c06274f61b31d1ae9c40ae41 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering at redhat.com>
Date: Fri, 5 Feb 2010 14:57:35 +0100
Subject: [PATCH] (absolutePathFromBaseFile): fix up preceding commit

* src/util/storage_file.c: Include <assert.h>.
(absolutePathFromBaseFile): Assert that converting size_t to int is valid.
Reverse length/string args to match "%.*s".
Explicitly ignore the return value of virAsprintf.
---
 src/util/storage_file.c |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/src/util/storage_file.c b/src/util/storage_file.c
index 2c79fa9..135acec 100644
--- a/src/util/storage_file.c
+++ b/src/util/storage_file.c
@@ -26,7 +26,9 @@

 #include <unistd.h>
 #include <fcntl.h>
+#include <assert.h>
 #include "dirname.h"
+#include "ignore-value.h"
 #include "memory.h"
 #include "virterror_internal.h"

@@ -255,7 +257,10 @@ absolutePathFromBaseFile(const char *base_file, const char *path)
     if (*path == '/' || d_len == 0)
         return strdup(path);

-    virAsprintf(&res, "%.*s/%s", base_file, d_len, path);
+    /* Ensure that the following cast-to-int is valid.  */
+    assert (d_len <= INT_MAX);
+
+    ignore_value(virAsprintf(&res, "%.*s/%s", (int) d_len, base_file, path));
     return res;
 }

--
1.7.0.rc1.204.gb96e