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+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+/* ######################################################################
+
+ File URI method for APT
+
+ This simply checks that the file specified exists, if so the relevant
+ information is returned. If a .gz filename is specified then the file
+ name with .gz removed will also be checked and information about it
+ will be returned in Alt-*
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <config.h>
+
+#include "aptmethod.h"
+#include <apt-pkg/aptconfiguration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/strutl.h>
+
+#include <string>
+#include <sys/stat.h>
+
+#include <apti18n.h>
+ /*}}}*/
+
+class FileMethod : public aptMethod
+{
+ virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE;
+
+ public:
+ FileMethod() : aptMethod("file", "1.0", SingleInstance | SendConfig | LocalOnly | SendURIEncoded)
+ {
+ SeccompFlags = aptMethod::BASE;
+ }
+};
+
+// FileMethod::Fetch - Fetch a file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool FileMethod::Fetch(FetchItem *Itm)
+{
+ URI Get(Itm->Uri);
+ std::string const File = DecodeSendURI(Get.Path);
+ FetchResult Res;
+ if (Get.Host.empty() == false)
+ return _error->Error(_("Invalid URI, local URIS must not start with //"));
+
+ struct stat Buf;
+ // deal with destination files which might linger around
+ if (lstat(Itm->DestFile.c_str(), &Buf) == 0)
+ {
+ if ((Buf.st_mode & S_IFREG) != 0)
+ {
+ if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
+ {
+ if (Itm->ExpectedHashes.VerifyFile(File))
+ {
+ Res.Filename = Itm->DestFile;
+ Res.IMSHit = true;
+ }
+ }
+ }
+ }
+ if (Res.IMSHit != true)
+ RemoveFile("file", Itm->DestFile);
+
+ int olderrno = 0;
+ // See if the file exists
+ if (stat(File.c_str(),&Buf) == 0)
+ {
+ Res.Size = Buf.st_size;
+ Res.Filename = File;
+ Res.LastModified = Buf.st_mtime;
+ Res.IMSHit = false;
+ if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
+ {
+ unsigned long long const filesize = Itm->ExpectedHashes.FileSize();
+ if (filesize != 0 && filesize == Res.Size)
+ Res.IMSHit = true;
+ }
+
+ CalculateHashes(Itm, Res);
+ }
+ else
+ olderrno = errno;
+ if (Res.IMSHit == false)
+ URIStart(Res);
+
+ // See if the uncompressed file exists and reuse it
+ FetchResult AltRes;
+ AltRes.Filename.clear();
+ std::vector<std::string> extensions = APT::Configuration::getCompressorExtensions();
+ for (std::vector<std::string>::const_iterator ext = extensions.begin(); ext != extensions.end(); ++ext)
+ {
+ if (APT::String::Endswith(File, *ext) == true)
+ {
+ std::string const unfile = File.substr(0, File.length() - ext->length());
+ if (stat(unfile.c_str(),&Buf) == 0)
+ {
+ AltRes.Size = Buf.st_size;
+ AltRes.Filename = unfile;
+ AltRes.LastModified = Buf.st_mtime;
+ AltRes.IMSHit = false;
+ if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0)
+ AltRes.IMSHit = true;
+ break;
+ }
+ // no break here as we could have situations similar to '.gz' vs '.tar.gz' here
+ }
+ }
+
+ if (AltRes.Filename.empty() == false)
+ URIDone(Res,&AltRes);
+ else if (Res.Filename.empty() == false)
+ URIDone(Res);
+ else
+ {
+ errno = olderrno;
+ return _error->Errno(File.c_str(), _("File not found"));
+ }
+
+ return true;
+}
+ /*}}}*/
+
+int main()
+{
+ return FileMethod().Run();
+}