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-rw-r--r--apt-pkg/pkgcachegen.cc18
1 files changed, 14 insertions, 4 deletions
diff --git a/apt-pkg/pkgcachegen.cc b/apt-pkg/pkgcachegen.cc
index 9820fde81..d0ea2e6e3 100644
--- a/apt-pkg/pkgcachegen.cc
+++ b/apt-pkg/pkgcachegen.cc
@@ -915,8 +915,11 @@ unsigned long pkgCacheGenerator::WriteUniqString(const char *S,
/* This just verifies that each file in the list of index files exists,
has matching attributes with the cache and the cache does not have
any extra files. */
-static bool CheckValidity(const string &CacheFile, FileIterator Start,
- FileIterator End,MMap **OutMap = 0)
+static bool CheckValidity(const string &CacheFile,
+ pkgSourceList &List,
+ FileIterator Start,
+ FileIterator End,
+ MMap **OutMap = 0)
{
bool const Debug = _config->FindB("Debug::pkgCacheGen", false);
// No file, certainly invalid
@@ -927,6 +930,13 @@ static bool CheckValidity(const string &CacheFile, FileIterator Start,
return false;
}
+ if (List.GetLastModifiedTime() < GetModificationTime(CacheFile))
+ {
+ if (Debug == true)
+ std::clog << "sources.list is newer than the cache" << std::endl;
+ return false;
+ }
+
// Map it
FileFd CacheF(CacheFile,FileFd::ReadOnly);
SPtr<MMap> Map = new MMap(CacheF,0);
@@ -1152,7 +1162,7 @@ bool pkgCacheGenerator::MakeStatusCache(pkgSourceList &List,OpProgress *Progress
Progress->OverallProgress(0,1,1,_("Reading package lists"));
// Cache is OK, Fin.
- if (CheckValidity(CacheFile,Files.begin(),Files.end(),OutMap) == true)
+ if (CheckValidity(CacheFile, List, Files.begin(),Files.end(),OutMap) == true)
{
if (Progress != NULL)
Progress->OverallProgress(1,1,1,_("Reading package lists"));
@@ -1189,7 +1199,7 @@ bool pkgCacheGenerator::MakeStatusCache(pkgSourceList &List,OpProgress *Progress
// Lets try the source cache.
unsigned long CurrentSize = 0;
unsigned long TotalSize = 0;
- if (CheckValidity(SrcCacheFile,Files.begin(),
+ if (CheckValidity(SrcCacheFile, List, Files.begin(),
Files.begin()+EndOfSource) == true)
{
if (Debug == true)