// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: multicompress.cc,v 1.2 2001/02/20 07:03:18 jgg Exp $
+// $Id: multicompress.cc,v 1.4 2003/02/10 07:34:41 doogie Exp $
/* ######################################################################
MultiCompressor
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "multicompress.h"
-#endif
+#include <config.h>
-#include "multicompress.h"
-
+#include <apt-pkg/fileutl.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/error.h>
#include <apt-pkg/md5.h>
-
+
#include <sys/types.h>
#include <sys/stat.h>
#include <utime.h>
#include <unistd.h>
+#include <iostream>
+
+#include "multicompress.h"
+#include <apti18n.h>
/*}}}*/
-const MultiCompress::CompType MultiCompress::Compressors[] =
- {{".","",0,0,0,1},
- {"gzip",".gz","gzip","-9n","-d",2},
- {"bzip2",".bz2","bzip2","-9","-d",3},
- {}};
+using namespace std;
+
// MultiCompress::MultiCompress - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* Setup the file outputs, compression modes and fork the writer child */
-MultiCompress::MultiCompress(string Output,string Compress,
- mode_t Permissions,bool Write)
+MultiCompress::MultiCompress(string const &Output,string const &Compress,
+ mode_t const &Permissions,bool const &Write) :
+ Permissions(Permissions)
{
Outputs = 0;
Outputter = -1;
Input = 0;
UpdateMTime = 0;
- this->Permissions = Permissions;
-
+
/* Parse the compression string, a space separated lists of compresison
types */
string::const_iterator I = Compress.begin();
for (; I != Compress.end();)
{
- for (; I != Compress.end() && isspace(*I); I++);
+ for (; I != Compress.end() && isspace(*I); ++I);
// Grab a word
string::const_iterator Start = I;
- for (; I != Compress.end() && !isspace(*I); I++);
+ for (; I != Compress.end() && !isspace(*I); ++I);
// Find the matching compressor
- const CompType *Comp = Compressors;
- for (; Comp->Name != 0; Comp++)
- if (stringcmp(Start,I,Comp->Name) == 0)
+ std::vector<APT::Configuration::Compressor> Compressors = APT::Configuration::getCompressors();
+ std::vector<APT::Configuration::Compressor>::const_iterator Comp = Compressors.begin();
+ for (; Comp != Compressors.end(); ++Comp)
+ if (stringcmp(Start,I,Comp->Name.c_str()) == 0)
break;
// Hmm.. unknown.
- if (Comp->Name == 0)
+ if (Comp == Compressors.end())
{
- _error->Warning("Unknown Compresison Algorithm '%s'",string(Start,I).c_str());
+ _error->Warning(_("Unknown compression algorithm '%s'"),string(Start,I).c_str());
continue;
}
Files *NewOut = new Files;
NewOut->Next = Outputs;
Outputs = NewOut;
- NewOut->CompressProg = Comp;
+ NewOut->CompressProg = *Comp;
NewOut->Output = Output+Comp->Extension;
struct stat St;
/* Open all the temp files now so we can report any errors. File is
made unreable to prevent people from touching it during creating. */
for (Files *I = Outputs; I != 0; I = I->Next)
- I->TmpFile.Open(I->Output + ".new",FileFd::WriteEmpty,0600);
+ I->TmpFile.Open(I->Output + ".new", FileFd::WriteOnly | FileFd::Create | FileFd::Empty, FileFd::Extension, 0600);
if (_error->PendingError() == true)
return;
if (Outputs == 0)
{
- _error->Error("Compressed output %s needs a compression set",Output.c_str());
+ _error->Error(_("Compressed output %s needs a compression set"),Output.c_str());
return;
}
/* This checks each compressed file to make sure it exists and returns
stat information for a random file from the collection. False means
one or more of the files is missing. */
-bool MultiCompress::GetStat(string Output,string Compress,struct stat &St)
+bool MultiCompress::GetStat(string const &Output,string const &Compress,struct stat &St)
{
/* Parse the compression string, a space separated lists of compresison
types */
bool DidStat = false;
for (; I != Compress.end();)
{
- for (; I != Compress.end() && isspace(*I); I++);
+ for (; I != Compress.end() && isspace(*I); ++I);
// Grab a word
string::const_iterator Start = I;
- for (; I != Compress.end() && !isspace(*I); I++);
+ for (; I != Compress.end() && !isspace(*I); ++I);
// Find the matching compressor
- const CompType *Comp = Compressors;
- for (; Comp->Name != 0; Comp++)
- if (stringcmp(Start,I,Comp->Name) == 0)
+ std::vector<APT::Configuration::Compressor> Compressors = APT::Configuration::getCompressors();
+ std::vector<APT::Configuration::Compressor>::const_iterator Comp = Compressors.begin();
+ for (; Comp != Compressors.end(); ++Comp)
+ if (stringcmp(Start,I,Comp->Name.c_str()) == 0)
break;
// Hmm.. unknown.
- if (Comp->Name == 0)
+ if (Comp == Compressors.end())
continue;
string Name = Output+Comp->Extension;
// Create a data pipe
int Pipe[2] = {-1,-1};
if (pipe(Pipe) != 0)
- return _error->Errno("pipe","Failed to create IPC pipe to subprocess");
+ return _error->Errno("pipe",_("Failed to create IPC pipe to subprocess"));
for (int I = 0; I != 2; I++)
SetCloseExec(Pipe[I],true);
_exit(0);
};
- /* Tidy up the temp files, we open them in the constructor so as to
- get proper error reporting. Close them now. */
- for (Files *I = Outputs; I != 0; I = I->Next)
- I->TmpFile.Close();
-
close(Pipe[0]);
Input = fdopen(Pipe[1],"w");
if (Input == 0)
- return _error->Errno("fdopen","Failed to create FILE*");
+ return _error->Errno("fdopen",_("Failed to create FILE*"));
if (Outputter == -1)
- return _error->Errno("fork","Failed to fork");
+ return _error->Errno("fork",_("Failed to fork"));
return true;
}
/*}}}*/
fclose(Input);
Input = 0;
- bool Res = ExecWait(Outputter,"Compress Child",false);
+ bool Res = ExecWait(Outputter,_("Compress child"),false);
Outputter = -1;
return Res;
}
// MultiCompress::Finalize - Finish up writing /*{{{*/
// ---------------------------------------------------------------------
/* This is only necessary for statistics reporting. */
-bool MultiCompress::Finalize(unsigned long &OutSize)
+bool MultiCompress::Finalize(unsigned long long &OutSize)
{
OutSize = 0;
if (Input == 0 || Die() == false)
{
struct stat St;
if (stat(I->Output.c_str(),&St) != 0)
- return _error->Error("Internal Error, Failed to create %s",
+ return _error->Error(_("Internal error, failed to create %s"),
I->Output.c_str());
if (I->OldMTime != St.st_mtime)
return true;
}
/*}}}*/
-// MultiCompress::OpenCompress - Open the compressor /*{{{*/
-// ---------------------------------------------------------------------
-/* This opens the compressor, either in compress mode or decompress
- mode. FileFd is always the compressor input/output file,
- OutFd is the created pipe, Input for Compress, Output for Decompress. */
-bool MultiCompress::OpenCompress(const CompType *Prog,int &Pid,int FileFd,
- int &OutFd,bool Comp)
-{
- Pid = -1;
-
- // No compression
- if (Prog->Binary == 0)
- {
- OutFd = dup(FileFd);
- return true;
- }
-
- // Create a data pipe
- int Pipe[2] = {-1,-1};
- if (pipe(Pipe) != 0)
- return _error->Errno("pipe","Failed to create subprocess IPC");
- for (int J = 0; J != 2; J++)
- SetCloseExec(Pipe[J],true);
-
- if (Comp == true)
- OutFd = Pipe[1];
- else
- OutFd = Pipe[0];
-
- // The child..
- Pid = ExecFork();
- if (Pid == 0)
- {
- if (Comp == true)
- {
- dup2(FileFd,STDOUT_FILENO);
- dup2(Pipe[0],STDIN_FILENO);
- }
- else
- {
- dup2(FileFd,STDIN_FILENO);
- dup2(Pipe[1],STDOUT_FILENO);
- }
-
- SetCloseExec(STDOUT_FILENO,false);
- SetCloseExec(STDIN_FILENO,false);
-
- const char *Args[3];
- Args[0] = Prog->Binary;
- if (Comp == true)
- Args[1] = Prog->CompArgs;
- else
- Args[1] = Prog->UnCompArgs;
- Args[2] = 0;
- execvp(Args[0],(char **)Args);
- cerr << "Failed to exec compressor " << Args[0] << endl;
- _exit(100);
- };
- if (Comp == true)
- close(Pipe[0]);
- else
- close(Pipe[1]);
- return true;
-}
- /*}}}*/
// MultiCompress::OpenOld - Open an old file /*{{{*/
// ---------------------------------------------------------------------
/* This opens one of the original output files, possibly decompressing it. */
-bool MultiCompress::OpenOld(int &Fd,int &Proc)
+bool MultiCompress::OpenOld(FileFd &Fd)
{
Files *Best = Outputs;
for (Files *I = Outputs; I != 0; I = I->Next)
- if (Best->CompressProg->Cost > I->CompressProg->Cost)
+ if (Best->CompressProg.Cost > I->CompressProg.Cost)
Best = I;
// Open the file
- FileFd F(Best->Output,FileFd::ReadOnly);
- if (_error->PendingError() == true)
- return false;
-
- // Decompress the file so we can read it
- if (OpenCompress(Best->CompressProg,Proc,F.Fd(),Fd,false) == false)
- return false;
-
- return true;
+ return Fd.Open(Best->Output, FileFd::ReadOnly, FileFd::Extension);
}
/*}}}*/
-// MultiCompress::CloseOld - Close the old file /*{{{*/
-// ---------------------------------------------------------------------
-/* */
-bool MultiCompress::CloseOld(int Fd,int Proc)
-{
- close(Fd);
- if (Proc != -1)
- if (ExecWait(Proc,"decompressor",false) == false)
- return false;
- return true;
-}
- /*}}}*/
// MultiCompress::Child - The writer child /*{{{*/
// ---------------------------------------------------------------------
/* The child process forks a bunch of compression children and takes
- input on FD and passes it to all the compressor childer. On the way it
+ input on FD and passes it to all the compressor child. On the way it
computes the MD5 of the raw data. After this the raw data in the
original files is compared to see if this data is new. If the data
is new then the temp files are renamed, otherwise they are erased. */
-bool MultiCompress::Child(int FD)
+bool MultiCompress::Child(int const &FD)
{
- // Start the compression children.
- for (Files *I = Outputs; I != 0; I = I->Next)
- {
- if (OpenCompress(I->CompressProg,I->CompressProc,I->TmpFile.Fd(),
- I->Fd,true) == false)
- return false;
- }
-
/* Okay, now we just feed data from FD to all the other FDs. Also
stash a hash of the data to use later. */
SetNonBlock(FD,false);
unsigned char Buffer[32*1024];
- unsigned long FileSize = 0;
+ unsigned long long FileSize = 0;
MD5Summation MD5;
while (1)
{
FileSize += Res;
for (Files *I = Outputs; I != 0; I = I->Next)
{
- if (write(I->Fd,Buffer,Res) != Res)
+ if (I->TmpFile.Write(Buffer, Res) == false)
{
- _error->Errno("write","IO to subprocess/file failed");
+ _error->Errno("write",_("IO to subprocess/file failed"));
break;
}
}
}
-
- // Close all the writers
- for (Files *I = Outputs; I != 0; I = I->Next)
- close(I->Fd);
-
- // Wait for the compressors to exit
- for (Files *I = Outputs; I != 0; I = I->Next)
- {
- if (I->CompressProc != -1)
- ExecWait(I->CompressProc,I->CompressProg->Binary,false);
- }
-
+
if (_error->PendingError() == true)
return false;
// Check the MD5 of the lowest cost entity.
while (Missing == false)
{
- int CompFd = -1;
- int Proc = -1;
- if (OpenOld(CompFd,Proc) == false)
+ FileFd CompFd;
+ if (OpenOld(CompFd) == false)
{
_error->Discard();
break;
}
-
+
// Compute the hash
MD5Summation OldMD5;
- unsigned long NewFileSize = 0;
+ unsigned long long NewFileSize = 0;
while (1)
{
- int Res = read(CompFd,Buffer,sizeof(Buffer));
+ unsigned long long Res = 0;
+ if (CompFd.Read(Buffer,sizeof(Buffer), &Res) == false)
+ return _error->Errno("read",_("Failed to read while computing MD5"));
if (Res == 0)
break;
- if (Res < 0)
- return _error->Errno("read","Failed to read while computing MD5");
NewFileSize += Res;
OldMD5.Add(Buffer,Res);
}
-
- // Tidy the compressor
- if (CloseOld(CompFd,Proc) == false)
- return false;
+ CompFd.Close();
// Check the hash
if (OldMD5.Result() == MD5.Result() &&
{
I->TmpFile.Close();
if (unlink(I->TmpFile.Name().c_str()) != 0)
- _error->Errno("unlink","Problem unlinking %s",
+ _error->Errno("unlink",_("Problem unlinking %s"),
I->TmpFile.Name().c_str());
}
return !_error->PendingError();
fchmod(I->TmpFile.Fd(),Permissions);
if (rename(I->TmpFile.Name().c_str(),I->Output.c_str()) != 0)
- _error->Errno("rename","Failed to rename %s to %s",
+ _error->Errno("rename",_("Failed to rename %s to %s"),
I->TmpFile.Name().c_str(),I->Output.c_str());
I->TmpFile.Close();
}
projects / apt.git / blobdiff