allow pdiff bootstrap from all supported compressors

[apt.git] / apt-pkg / clean.cc

diff --git a/apt-pkg/clean.cc b/apt-pkg/clean.cc
index 2e5fd675a0044f90da9d06db5ad0adbe0a8fe904..fe57c26a2287da6015394321a857242b753e27c6 100644 (file)
--- a/apt-pkg/clean.cc
+++ b/apt-pkg/clean.cc
@@ -15,7 +15,12 @@
 #include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
 #include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
 
+#include <string>
+#include <string.h>
 #include <dirent.h>
 #include <sys/stat.h>
 #include <unistd.h>
@@ -26,15 +31,23 @@
 // ---------------------------------------------------------------------
 /* Scan the directory for files to erase, we check the version information
    against our database to see if it is interesting */
-bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
+bool pkgArchiveCleaner::Go(std::string Dir,pkgCache &Cache)
 {
    bool CleanInstalled = _config->FindB("APT::Clean-Installed",true);
-      
+
+   if(Dir == "/")
+      return _error->Error(_("Clean of %s is not supported"), Dir.c_str());
+
+   // non-existing directories are always clean
+   // we do not check for a directory explicitly to support symlinks
+   if (FileExists(Dir) == false)
+      return true;
+
    DIR *D = opendir(Dir.c_str());
    if (D == 0)
       return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
 
-   string StartDir = SafeGetCWD();
+   std::string StartDir = SafeGetCWD();
    if (chdir(Dir.c_str()) != 0)
    {
       closedir(D);
@@ -46,6 +59,7 @@ bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
       // Skip some files..
       if (strcmp(Dir->d_name,"lock") == 0 ||
          strcmp(Dir->d_name,"partial") == 0 ||
+         strcmp(Dir->d_name,"lost+found") == 0 ||
          strcmp(Dir->d_name,".") == 0 ||
          strcmp(Dir->d_name,"..") == 0)
         continue;
@@ -53,9 +67,11 @@ bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
       struct stat St;
       if (stat(Dir->d_name,&St) != 0)
       {
-        chdir(StartDir.c_str());
+        _error->Errno("stat",_("Unable to stat %s."),Dir->d_name);
         closedir(D);
-        return _error->Errno("stat",_("Unable to stat %s."),Dir->d_name);
+        if (chdir(StartDir.c_str()) != 0)
+           return _error->Errno("chdir", _("Unable to change to %s"), StartDir.c_str());
+        return false;
       }
       
       // Grab the package name
@@ -63,45 +79,46 @@ bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
       for (; *I != 0 && *I != '_';I++);
       if (*I != '_')
         continue;
-      string Pkg = DeQuoteString(string(Dir->d_name,I-Dir->d_name));
+      std::string Pkg = DeQuoteString(std::string(Dir->d_name,I-Dir->d_name));
 
       // Grab the version
       const char *Start = I + 1;
       for (I = Start; *I != 0 && *I != '_';I++);
       if (*I != '_')
         continue;
-      string Ver = DeQuoteString(string(Start,I-Start));
+      std::string Ver = DeQuoteString(std::string(Start,I-Start));
   
       // Grab the arch
       Start = I + 1;
       for (I = Start; *I != 0 && *I != '.' ;I++);
       if (*I != '.')
         continue;
-      string const Arch = DeQuoteString(string(Start,I-Start));
-      
+      std::string const Arch = DeQuoteString(std::string(Start,I-Start));
+
+      // ignore packages of unconfigured architectures
       if (APT::Configuration::checkArchitecture(Arch) == false)
         continue;
       
       // Lookup the package
-      pkgCache::PkgIterator P = Cache.FindPkg(Pkg);
+      pkgCache::PkgIterator P = Cache.FindPkg(Pkg, Arch);
       if (P.end() != true)
       {
         pkgCache::VerIterator V = P.VersionList();
-        for (; V.end() == false; V++)
+        for (; V.end() == false; ++V)
         {
            // See if we can fetch this version at all
            bool IsFetchable = false;
            for (pkgCache::VerFileIterator J = V.FileList(); 
-                J.end() == false; J++)
+                J.end() == false; ++J)
            {
               if (CleanInstalled == true &&
-                  (J.File()->Flags & pkgCache::Flag::NotSource) != 0)
+                  J.File().Flagged(pkgCache::Flag::NotSource))
                  continue;
               IsFetchable = true;
               break;
            }
            
-           // See if this verison matches the file
+           // See if this version matches the file
            if (IsFetchable == true && Ver == V.VerStr())
               break;
         }
@@ -114,8 +131,12 @@ bool pkgArchiveCleaner::Go(string Dir,pkgCache &Cache)
       Erase(Dir->d_name,Pkg,Ver,St);
    };
    
-   chdir(StartDir.c_str());
    closedir(D);
-   return true;   
+   if (chdir(StartDir.c_str()) != 0)
+      return _error->Errno("chdir", _("Unable to change to %s"), StartDir.c_str());
+   return true;
 }
                                                                        /*}}}*/
+
+pkgArchiveCleaner::pkgArchiveCleaner() : d(NULL) {}
+APT_CONST pkgArchiveCleaner::~pkgArchiveCleaner() {}