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authorMichael Vogt <michael.vogt@ubuntu.com>2009-07-30 17:34:48 +0200
committerMichael Vogt <michael.vogt@ubuntu.com>2009-07-30 17:34:48 +0200
commit55fb35e87a1ff550cbb3010c5a03064f0a2b10be (patch)
tree6ecb92eb145eefbb0c4a6dc6a869d9e21ba10b55 /apt-pkg/policy.cc
parentadbce12126ccc58016af69d541bafad5c8bde631 (diff)
parentd5752e18bed18c706c93f5c43c61016c72132ede (diff)
merged from debian
Diffstat (limited to 'apt-pkg/policy.cc')
-rw-r--r--apt-pkg/policy.cc84
1 files changed, 82 insertions, 2 deletions
diff --git a/apt-pkg/policy.cc b/apt-pkg/policy.cc
index 8b083fd44..81fdb0431 100644
--- a/apt-pkg/policy.cc
+++ b/apt-pkg/policy.cc
@@ -32,6 +32,9 @@
#include <apti18n.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <algorithm>
#include <iostream>
#include <sstream>
/*}}}*/
@@ -120,6 +123,14 @@ pkgCache::VerIterator pkgPolicy::GetCandidateVer(pkgCache::PkgIterator Pkg)
signed Max = GetPriority(Pkg);
pkgCache::VerIterator Pref = GetMatch(Pkg);
+ // no package = no candidate version
+ if (Pkg.end() == true)
+ return Pref;
+
+ // packages with a pin lower than 0 have no newer candidate than the current version
+ if (Max < 0)
+ return Pkg.CurrentVer();
+
/* Falling through to the default version.. Setting Max to zero
effectively excludes everything <= 0 which are the non-automatic
priorities.. The status file is given a prio of 100 which will exclude
@@ -239,7 +250,76 @@ signed short pkgPolicy::GetPriority(pkgCache::PkgIterator const &Pkg)
return 0;
}
/*}}}*/
+// PreferenceSection class - Overriding the default TrimRecord method /*{{{*/
+// ---------------------------------------------------------------------
+/* The preference file is a user generated file so the parser should
+ therefore be a bit more friendly by allowing comments and new lines
+ all over the place rather than forcing a special format */
+class PreferenceSection : public pkgTagSection
+{
+ void TrimRecord(bool BeforeRecord, const char* &End)
+ {
+ for (; Stop < End && (Stop[0] == '\n' || Stop[0] == '\r' || Stop[0] == '#'); Stop++)
+ if (Stop[0] == '#')
+ Stop = (const char*) memchr(Stop,'\n',End-Stop);
+ }
+};
+ /*}}}*/
+// ReadPinDir - Load the pin files from this dir into a Policy /*{{{*/
+// ---------------------------------------------------------------------
+/* This will load each pin file in the given dir into a Policy. If the
+ given dir is empty the dir set in Dir::Etc::PreferencesParts is used.
+ Note also that this method will issue a warning if the dir does not
+ exists but it will return true in this case! */
+bool ReadPinDir(pkgPolicy &Plcy,string Dir)
+{
+ if (Dir.empty() == true)
+ Dir = _config->FindDir("Dir::Etc::PreferencesParts");
+
+ if (FileExists(Dir) == false)
+ {
+ _error->WarningE("FileExists",_("Unable to read %s"),Dir.c_str());
+ return true;
+ }
+
+ DIR *D = opendir(Dir.c_str());
+ if (D == 0)
+ return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
+
+ vector<string> List;
+ for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D))
+ {
+ if (Ent->d_name[0] == '.')
+ continue;
+
+ // Skip bad file names ala run-parts
+ const char *C = Ent->d_name;
+ for (; *C != 0; C++)
+ if (isalpha(*C) == 0 && isdigit(*C) == 0 && *C != '_' && *C != '-')
+ break;
+ if (*C != 0)
+ continue;
+
+ // Make sure it is a file and not something else
+ string File = flCombine(Dir,Ent->d_name);
+ struct stat St;
+ if (stat(File.c_str(),&St) != 0 || S_ISREG(St.st_mode) == 0)
+ continue;
+
+ List.push_back(File);
+ }
+ closedir(D);
+
+ sort(List.begin(),List.end());
+
+ // Read the files
+ for (vector<string>::const_iterator I = List.begin(); I != List.end(); I++)
+ if (ReadPinFile(Plcy, *I) == false)
+ return false;
+ return true;
+}
+ /*}}}*/
// ReadPinFile - Load the pin file into a Policy /*{{{*/
// ---------------------------------------------------------------------
/* I'd like to see the preferences file store more than just pin information
@@ -259,12 +339,12 @@ bool ReadPinFile(pkgPolicy &Plcy,string File)
if (_error->PendingError() == true)
return false;
- pkgTagSection Tags;
+ PreferenceSection Tags;
while (TF.Step(Tags) == true)
{
string Name = Tags.FindS("Package");
if (Name.empty() == true)
- return _error->Error(_("Invalid record in the preferences file, no Package header"));
+ return _error->Error(_("Invalid record in the preferences file %s, no Package header"), File.c_str());
if (Name == "*")
Name = string();