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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
/* ######################################################################
Copy URI - This method takes a uri like a file: uri and copies it
to the destination file.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <config.h>
#include "aptmethod.h"
#include <apt-pkg/configuration.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 <sys/time.h>
#include <apti18n.h>
/*}}}*/
class CopyMethod final : public aptMethod
{
bool URIAcquire(std::string const &Message, FetchItem *Itm) override;
public:
CopyMethod() : aptMethod("copy", "1.0", SingleInstance | SendConfig | SendURIEncoded)
{
SeccompFlags = aptMethod::BASE;
}
};
// CopyMethod::Fetch - Fetch a file /*{{{*/
bool CopyMethod::URIAcquire(std::string const &Message, FetchItem *Itm)
{
struct FileCopyType {
std::string name;
struct stat stat{};
explicit FileCopyType(std::string &&file) noexcept : name{std::move(file)} {}
};
std::vector<FileCopyType> files;
// this ensures that relative paths work
files.emplace_back(DecodeSendURI(Itm->Uri.substr(Itm->Uri.find(':')+1)));
for (auto const &AltPath : VectorizeString(LookupTag(Message, "Alternate-Paths"), '\n'))
files.emplace_back(CombineWithAlternatePath(flNotFile(files[0].name), DecodeSendURI(AltPath)));
files.erase(std::remove_if(files.begin(), files.end(), [](auto &file)
{ return stat(file.name.c_str(), &file.stat) != 0; }),
files.end());
if (files.empty())
return _error->Errno("copy-stat", _("Failed to stat"));
// Forumulate a result and send a start message
FetchResult Res;
Res.Filename = Itm->DestFile;
Res.IMSHit = false;
for (auto const &File : files)
{
Res.Size = File.stat.st_size;
Res.LastModified = File.stat.st_mtime;
// just calc the hashes if the source and destination are identical
if (Itm->DestFile == "/dev/null" || File.name == Itm->DestFile)
{
URIStart(Res);
CalculateHashes(Itm, Res);
URIDone(Res);
return true;
}
FileFd From(File.name, FileFd::ReadOnly);
FileFd To(Itm->DestFile, FileFd::WriteAtomic);
To.EraseOnFailure();
if (not From.IsOpen() || not To.IsOpen())
continue;
// Copy the file
URIStart(Res);
if (not CopyFile(From, To))
{
To.OpFail();
continue;
}
From.Close();
To.Close();
CalculateHashes(Itm, Res);
if (not Itm->ExpectedHashes.empty() && Itm->ExpectedHashes != Res.Hashes)
continue;
if (not TransferModificationTimes(File.name.c_str(), Res.Filename.c_str(), Res.LastModified))
continue;
URIDone(Res);
return true;
}
return false;
}
/*}}}*/
int main()
{
return CopyMethod().Run();
}
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