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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)
{
SeccompFlags = aptMethod::BASE;
}
};
// FileMethod::Fetch - Fetch a file /*{{{*/
// ---------------------------------------------------------------------
/* */
bool FileMethod::Fetch(FetchItem *Itm)
{
URI Get = Itm->Uri;
std::string File = 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)
{
HashStringList const hsl = Itm->ExpectedHashes;
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();
}
|
