apt-inst: Do not try to create a substring of an empty string in error reporting

[apt.git] / ftparchive / writer.cc

diff --git a/ftparchive/writer.cc b/ftparchive/writer.cc
index d26b160f954368b1b8b62ecde1f4404cd30cdefc..153c4fb427b4e3260966845754e294ac27214629 100644 (file)
--- a/ftparchive/writer.cc
+++ b/ftparchive/writer.cc
@@ -13,28 +13,37 @@
 // Include Files                                                       /*{{{*/
 #include <config.h>
 
-#include <apt-pkg/strutl.h>
-#include <apt-pkg/error.h>
 #include <apt-pkg/configuration.h>
-#include <apt-pkg/aptconfiguration.h>
-#include <apt-pkg/md5.h>
-#include <apt-pkg/hashes.h>
 #include <apt-pkg/deblistparser.h>
+#include <apt-pkg/error.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/gpgv.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/md5.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/debfile.h>
+#include <apt-pkg/pkgcache.h>
+#include <apt-pkg/sha1.h>
+#include <apt-pkg/sha2.h>
+#include <apt-pkg/tagfile.h>
 
+#include <ctype.h>
+#include <fnmatch.h>
+#include <ftw.h>
+#include <locale.h>
+#include <string.h>
+#include <sys/stat.h>
 #include <sys/types.h>
 #include <unistd.h>
 #include <ctime>
-#include <ftw.h>
-#include <fnmatch.h>
 #include <iostream>
 #include <sstream>
 #include <memory>
+#include <utility>
 
+#include "apt-ftparchive.h"
 #include "writer.h"
 #include "cachedb.h"
-#include "apt-ftparchive.h"
 #include "multicompress.h"
 
 #include <apti18n.h>
@@ -72,9 +81,9 @@ FTWScanner::FTWScanner(string const &Arch): Arch(Arch)
                                                                        /*}}}*/
 // FTWScanner::Scanner - FTW Scanner                                   /*{{{*/
 // ---------------------------------------------------------------------
-/* This is the FTW scanner, it processes each directory element in the 
+/* This is the FTW scanner, it processes each directory element in the
    directory tree. */
-int FTWScanner::ScannerFTW(const char *File,const struct stat *sb,int Flag)
+int FTWScanner::ScannerFTW(const char *File,const struct stat * /*sb*/,int Flag)
 {
    if (Flag == FTW_DNR)
    {
@@ -284,7 +293,8 @@ bool FTWScanner::Delink(string &FileName,const char *OriginalPath,
                  if (link(FileName.c_str(),OriginalPath) != 0)
                  {
                     // Panic! Restore the symlink
-                    symlink(OldLink,OriginalPath);
+                    if (symlink(OldLink,OriginalPath) != 0)
+                        _error->Errno("symlink", "failed to restore symlink");
                     return _error->Errno("link",_("*** Failed to link %s to %s"),
                                          FileName.c_str(),
                                          OriginalPath);
@@ -564,8 +574,9 @@ TranslationWriter::~TranslationWriter()
 // SourcesWriter::SourcesWriter - Constructor                          /*{{{*/
 // ---------------------------------------------------------------------
 /* */
-SourcesWriter::SourcesWriter(string const &BOverrides,string const &SOverrides,
-                            string const &ExtOverrides)
+SourcesWriter::SourcesWriter(string const &DB, string const &BOverrides,string const &SOverrides,
+                            string const &ExtOverrides) :
+   Db(DB), Stats(Db.Stats)
 {
    Output = stdout;
    AddPattern("*.dsc");
@@ -577,7 +588,9 @@ SourcesWriter::SourcesWriter(string const &BOverrides,string const &SOverrides,
    DoMD5 = _config->FindB("APT::FTPArchive::Sources::MD5",DoMD5);
    DoSHA1 = _config->FindB("APT::FTPArchive::Sources::SHA1",DoSHA1);
    DoSHA256 = _config->FindB("APT::FTPArchive::Sources::SHA256",DoSHA256);
+   DoSHA512 = _config->FindB("APT::FTPArchive::Sources::SHA512",DoSHA512);
    NoOverride = _config->FindB("APT::FTPArchive::NoOverrideMsg",false);
+   DoAlwaysStat = _config->FindB("APT::FTPArchive::AlwaysStat", false);
 
    // Read the override file
    if (BOverrides.empty() == false && BOver.ReadOverride(BOverrides) == false)
@@ -727,19 +740,16 @@ bool SourcesWriter::DoPackage(string FileName)
    if (DoSHA1 == true && Tags.Exists("Checksums-Sha1"))
       ostreamSha1 << "\n " << string(DscHashes.SHA1.Result()) << " " << St.st_size << " "
                   << strippedName << "\n " << Tags.FindS("Checksums-Sha1");
-   string const ChecksumsSha1 = ostreamSha1.str();
 
    std::ostringstream ostreamSha256;
    if (DoSHA256 == true && Tags.Exists("Checksums-Sha256"))
       ostreamSha256 << "\n " << string(DscHashes.SHA256.Result()) << " " << St.st_size << " "
                   << strippedName << "\n " << Tags.FindS("Checksums-Sha256");
-   string const ChecksumsSha256 = ostreamSha256.str();
 
    std::ostringstream ostreamSha512;
-   if (Tags.Exists("Checksums-Sha512"))
+   if (DoSHA512 == true && Tags.Exists("Checksums-Sha512"))
       ostreamSha512 << "\n " << string(DscHashes.SHA512.Result()) << " " << St.st_size << " "
                   << strippedName << "\n " << Tags.FindS("Checksums-Sha512");
-   string const ChecksumsSha512 = ostreamSha512.str();
 
    // Strip the DirStrip prefix from the FileName and add the PathPrefix
    string NewFileName;
@@ -755,7 +765,7 @@ bool SourcesWriter::DoPackage(string FileName)
    string Directory = flNotFile(OriginalPath);
    string Package = Tags.FindS("Source");
 
-   // Perform the delinking operation over all of the files
+   // Perform operation over all of the files
    string ParseJnk;
    const char *C = Files.c_str();
    char *RealPath = NULL;
@@ -767,9 +777,36 @@ bool SourcesWriter::DoPackage(string FileName)
          ParseQuoteWord(C,ParseJnk) == false ||
          ParseQuoteWord(C,ParseJnk) == false)
         return _error->Error("Error parsing file record");
-      
-      char Jnk[2];
+
       string OriginalPath = Directory + ParseJnk;
+
+      // Add missing hashes to source files
+      if ((DoSHA1 == true && !Tags.Exists("Checksums-Sha1")) ||
+          (DoSHA256 == true && !Tags.Exists("Checksums-Sha256")) ||
+          (DoSHA512 == true && !Tags.Exists("Checksums-Sha512")))
+      {
+         if (Db.GetFileInfo(OriginalPath, false, false, false, DoMD5, DoSHA1, DoSHA256, DoSHA512, DoAlwaysStat)
+               == false)
+         {
+            return _error->Error("Error getting file info");
+         }
+
+         if (DoSHA1 == true && !Tags.Exists("Checksums-Sha1"))
+            ostreamSha1 << "\n " << string(Db.SHA1Res) << " "
+               << Db.GetFileSize() << " " << ParseJnk;
+
+         if (DoSHA256 == true && !Tags.Exists("Checksums-Sha256"))
+            ostreamSha256 << "\n " << string(Db.SHA256Res) << " "
+               << Db.GetFileSize() << " " << ParseJnk;
+
+         if (DoSHA512 == true && !Tags.Exists("Checksums-Sha512"))
+            ostreamSha512 << "\n " << string(Db.SHA512Res) << " "
+               << Db.GetFileSize() << " " << ParseJnk;
+      }
+
+      // Perform the delinking operation
+      char Jnk[2];
+
       if (readlink(OriginalPath.c_str(),Jnk,sizeof(Jnk)) != -1 &&
          (RealPath = realpath(OriginalPath.c_str(),NULL)) != 0)
       {
@@ -784,6 +821,10 @@ bool SourcesWriter::DoPackage(string FileName)
    if (Directory.length() > 2)
       Directory.erase(Directory.end()-1);
 
+   string const ChecksumsSha1 = ostreamSha1.str();
+   string const ChecksumsSha256 = ostreamSha256.str();
+   string const ChecksumsSha512 = ostreamSha512.str();
+
    // This lists all the changes to the fields we are going to make.
    // (5 hardcoded + checksums + maintainer + end marker)
    TFRewriteData Changes[5+2+1+SOverItem->FieldOverride.size()+1];
@@ -831,7 +872,7 @@ bool SourcesWriter::DoPackage(string FileName)
 
    Stats.Packages++;
    
-   return true;
+   return Db.Finish();
 }
                                                                        /*}}}*/
 
@@ -919,7 +960,7 @@ bool ContentsWriter::ReadFromPkgs(string const &PkgFile,string const &PkgCompres
 // ReleaseWriter::ReleaseWriter - Constructor                          /*{{{*/
 // ---------------------------------------------------------------------
 /* */
-ReleaseWriter::ReleaseWriter(string const &DB)
+ReleaseWriter::ReleaseWriter(string const &/*DB*/)
 {
    if (_config->FindB("APT::FTPArchive::Release::Default-Patterns", true) == true)
    {