#include <set>
#include <algorithm>
+// FIXME: Compressor Fds have some speed disadvantages and are a bit buggy currently,
+// so while the current implementation satisfies the testcases it is not a real option
+// to disable it for now
+#define APT_USE_ZLIB 1
+#if APT_USE_ZLIB
#include <zlib.h>
+#else
+#pragma message "Usage of zlib is DISABLED!"
+#endif
#ifdef WORDS_BIGENDIAN
#include <inttypes.h>
class FileFdPrivate {
public:
+#if APT_USE_ZLIB
gzFile gz;
- FileFdPrivate() : gz(NULL) {};
+#else
+ void* gz;
+#endif
+ int compressed_fd;
+ pid_t compressor_pid;
+ bool pipe;
+ APT::Configuration::Compressor compressor;
+ unsigned int openmode;
+ unsigned long long seekpos;
+ FileFdPrivate() : gz(NULL), compressed_fd(-1), compressor_pid(-1), pipe(false),
+ openmode(0), seekpos(0) {};
};
// RunScripts - Run a set of scripts from a configuration subtree /*{{{*/
// FileFd::Open - Open a file /*{{{*/
// ---------------------------------------------------------------------
/* The most commonly used open mode combinations are given with Mode */
-bool FileFd::Open(string FileName,OpenMode Mode,CompressMode Compress, unsigned long const Perms)
+bool FileFd::Open(string FileName,unsigned int const Mode,CompressMode Compress, unsigned long const Perms)
{
if (Mode == ReadOnlyGzip)
return Open(FileName, ReadOnly, Gzip, Perms);
- Close();
- d = new FileFdPrivate;
- Flags = AutoClose;
if (Compress == Auto && (Mode & WriteOnly) == WriteOnly)
return _error->Error("Autodetection on %s only works in ReadOnly openmode!", FileName.c_str());
- if ((Mode & WriteOnly) != WriteOnly && (Mode & (Atomic | Create | Empty | Exclusive)) != 0)
- return _error->Error("ReadOnly mode for %s doesn't accept additional flags!", FileName.c_str());
-
- int fileflags = 0;
-#define if_FLAGGED_SET(FLAG, MODE) if ((Mode & FLAG) == FLAG) fileflags |= MODE
- if_FLAGGED_SET(ReadWrite, O_RDWR);
- else if_FLAGGED_SET(ReadOnly, O_RDONLY);
- else if_FLAGGED_SET(WriteOnly, O_WRONLY);
- else return _error->Error("No openmode provided in FileFd::Open for %s", FileName.c_str());
-
- if_FLAGGED_SET(Create, O_CREAT);
- if_FLAGGED_SET(Exclusive, O_EXCL);
- else if_FLAGGED_SET(Atomic, O_EXCL);
- if_FLAGGED_SET(Empty, O_TRUNC);
-#undef if_FLAGGED_SET
// FIXME: Denote inbuilt compressors somehow - as we don't need to have the binaries for them
std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
std::vector<APT::Configuration::Compressor>::const_iterator compressor = compressors.begin();
if (Compress == Auto)
{
- Compress = None;
for (; compressor != compressors.end(); ++compressor)
{
std::string file = std::string(FileName).append(compressor->Extension);
if (FileExists(file) == false)
continue;
FileName = file;
- if (compressor->Binary == ".")
- Compress = None;
- else
- Compress = Extension;
break;
}
}
else if (Compress == Extension)
{
- Compress = None;
- std::string ext = flExtension(FileName);
- if (ext != FileName)
+ std::string::size_type const found = FileName.find_last_of('.');
+ std::string ext;
+ if (found != std::string::npos)
{
- ext = "." + ext;
- for (; compressor != compressors.end(); ++compressor)
- if (ext == compressor->Extension)
- break;
+ ext = FileName.substr(found);
+ if (ext == ".new" || ext == ".bak")
+ {
+ std::string::size_type const found2 = FileName.find_last_of('.', found - 1);
+ if (found2 != std::string::npos)
+ ext = FileName.substr(found2, found - found2);
+ else
+ ext.clear();
+ }
}
+ for (; compressor != compressors.end(); ++compressor)
+ if (ext == compressor->Extension)
+ break;
+ // no matching extension - assume uncompressed (imagine files like 'example.org_Packages')
+ if (compressor == compressors.end())
+ for (compressor = compressors.begin(); compressor != compressors.end(); ++compressor)
+ if (compressor->Name == ".")
+ break;
}
- else if (Compress != None)
+ else
{
std::string name;
switch (Compress)
{
+ case None: name = "."; break;
case Gzip: name = "gzip"; break;
case Bzip2: name = "bzip2"; break;
case Lzma: name = "lzma"; break;
case Xz: name = "xz"; break;
- default: return _error->Error("Can't find a match for specified compressor mode for file %s", FileName.c_str());
+ case Auto:
+ case Extension:
+ // Unreachable
+ return _error->Error("Opening File %s in None, Auto or Extension should be already handled?!?", FileName.c_str());
}
for (; compressor != compressors.end(); ++compressor)
if (compressor->Name == name)
break;
- if (compressor == compressors.end() && name != "gzip")
+ if (compressor == compressors.end())
return _error->Error("Can't find a configured compressor %s for file %s", name.c_str(), FileName.c_str());
}
- // if we have them, use inbuilt compressors instead of forking
- if (compressor != compressors.end())
- {
- if (compressor->Name == "gzip")
- {
- Compress = Gzip;
- compressor = compressors.end();
- }
- else if (compressor->Name == "." || Compress == None)
- {
- Compress = None;
- compressor = compressors.end();
- }
- }
+ if (compressor == compressors.end())
+ return _error->Error("Can't find a match for specified compressor mode for file %s", FileName.c_str());
+ return Open(FileName, Mode, *compressor, Perms);
+}
+bool FileFd::Open(string FileName,unsigned int const Mode,APT::Configuration::Compressor const &compressor, unsigned long const Perms)
+{
+ Close();
+ d = new FileFdPrivate;
+ d->openmode = Mode;
+ Flags = AutoClose;
+
+ if ((Mode & WriteOnly) != WriteOnly && (Mode & (Atomic | Create | Empty | Exclusive)) != 0)
+ return _error->Error("ReadOnly mode for %s doesn't accept additional flags!", FileName.c_str());
+ if ((Mode & ReadWrite) == 0)
+ return _error->Error("No openmode provided in FileFd::Open for %s", FileName.c_str());
if ((Mode & Atomic) == Atomic)
{
unlink(FileName.c_str());
}
- if (compressor != compressors.end())
- {
- if ((Mode & ReadWrite) == ReadWrite)
- _error->Error("External compressors like %s do not support readwrite mode for file %s", compressor->Name.c_str(), FileName.c_str());
+ int fileflags = 0;
+ #define if_FLAGGED_SET(FLAG, MODE) if ((Mode & FLAG) == FLAG) fileflags |= MODE
+ if_FLAGGED_SET(ReadWrite, O_RDWR);
+ else if_FLAGGED_SET(ReadOnly, O_RDONLY);
+ else if_FLAGGED_SET(WriteOnly, O_WRONLY);
- _error->Error("Forking external compressor %s is not implemented for %s", compressor->Name.c_str(), FileName.c_str());
- }
+ if_FLAGGED_SET(Create, O_CREAT);
+ if_FLAGGED_SET(Empty, O_TRUNC);
+ if_FLAGGED_SET(Exclusive, O_EXCL);
+ else if_FLAGGED_SET(Atomic, O_EXCL);
+ #undef if_FLAGGED_SET
+
+ if (TemporaryFileName.empty() == false)
+ iFd = open(TemporaryFileName.c_str(), fileflags, Perms);
else
- {
- if (TemporaryFileName.empty() == false)
- iFd = open(TemporaryFileName.c_str(), fileflags, Perms);
- else
- iFd = open(FileName.c_str(), fileflags, Perms);
+ iFd = open(FileName.c_str(), fileflags, Perms);
+ if (iFd == -1 || OpenInternDescriptor(Mode, compressor) == false)
+ {
if (iFd != -1)
{
- if (OpenInternDescriptor(Mode, Compress) == false)
- {
- close (iFd);
- iFd = -1;
- }
+ close (iFd);
+ iFd = -1;
}
+ return _error->Errno("open",_("Could not open file %s"), FileName.c_str());
}
- if (iFd == -1)
- return _error->Errno("open",_("Could not open file %s"),FileName.c_str());
-
this->FileName = FileName;
SetCloseExec(iFd,true);
return true;
// FileFd::OpenDescriptor - Open a filedescriptor /*{{{*/
// ---------------------------------------------------------------------
/* */
-bool FileFd::OpenDescriptor(int Fd, OpenMode Mode, CompressMode Compress, bool AutoClose)
+bool FileFd::OpenDescriptor(int Fd, unsigned int const Mode, CompressMode Compress, bool AutoClose)
+{
+ std::vector<APT::Configuration::Compressor> const compressors = APT::Configuration::getCompressors();
+ std::vector<APT::Configuration::Compressor>::const_iterator compressor = compressors.begin();
+ std::string name;
+ switch (Compress)
+ {
+ case None: name = "."; break;
+ case Gzip: name = "gzip"; break;
+ case Bzip2: name = "bzip2"; break;
+ case Lzma: name = "lzma"; break;
+ case Xz: name = "xz"; break;
+ case Auto:
+ case Extension:
+ return _error->Error("Opening Fd %d in Auto or Extension compression mode is not supported", Fd);
+ }
+ for (; compressor != compressors.end(); ++compressor)
+ if (compressor->Name == name)
+ break;
+ if (compressor == compressors.end())
+ return _error->Error("Can't find a configured compressor %s for file %s", name.c_str(), FileName.c_str());
+
+ return OpenDescriptor(Fd, Mode, *compressor, AutoClose);
+}
+bool FileFd::OpenDescriptor(int Fd, unsigned int const Mode, APT::Configuration::Compressor const &compressor, bool AutoClose)
{
Close();
d = new FileFdPrivate;
+ d->openmode = Mode;
Flags = (AutoClose) ? FileFd::AutoClose : 0;
iFd = Fd;
- if (OpenInternDescriptor(Mode, Compress) == false)
+ if (OpenInternDescriptor(Mode, compressor) == false)
{
if (AutoClose)
close (iFd);
this->FileName = "";
return true;
}
-bool FileFd::OpenInternDescriptor(OpenMode Mode, CompressMode Compress)
+bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::Compressor const &compressor)
{
- if (Compress == None)
+ d->compressor = compressor;
+ if (compressor.Name == "." || compressor.Binary.empty() == true)
return true;
- else if (Compress == Gzip)
+#if APT_USE_ZLIB
+ else if (compressor.Name == "gzip")
{
if ((Mode & ReadWrite) == ReadWrite)
d->gz = gzdopen(iFd, "r+");
if (d->gz == NULL)
return false;
Flags |= Compressed;
+ return true;
+ }
+#endif
+
+ if ((Mode & ReadWrite) == ReadWrite)
+ return _error->Error("ReadWrite mode is not supported for file %s", FileName.c_str());
+
+ bool const Comp = (Mode & WriteOnly) == WriteOnly;
+ // Handle 'decompression' of empty files
+ if (Comp == false)
+ {
+ struct stat Buf;
+ fstat(iFd, &Buf);
+ if (Buf.st_size == 0 && S_ISFIFO(Buf.st_mode) == false)
+ return true;
+
+ // We don't need the file open - instead let the compressor open it
+ // as he properly knows better how to efficiently read from 'his' file
+ if (FileName.empty() == false)
+ close(iFd);
}
+
+ // 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);
+
+ d->compressed_fd = iFd;
+ d->pipe = true;
+
+ if (Comp == true)
+ iFd = Pipe[1];
else
- return false;
+ iFd = Pipe[0];
+
+ // The child..
+ d->compressor_pid = ExecFork();
+ if (d->compressor_pid == 0)
+ {
+ if (Comp == true)
+ {
+ dup2(d->compressed_fd,STDOUT_FILENO);
+ dup2(Pipe[0],STDIN_FILENO);
+ }
+ else
+ {
+ if (FileName.empty() == true)
+ dup2(d->compressed_fd,STDIN_FILENO);
+ dup2(Pipe[1],STDOUT_FILENO);
+ }
+
+ SetCloseExec(STDOUT_FILENO,false);
+ SetCloseExec(STDIN_FILENO,false);
+
+ std::vector<char const*> Args;
+ Args.push_back(compressor.Binary.c_str());
+ std::vector<std::string> const * const addArgs =
+ (Comp == true) ? &(compressor.CompressArgs) : &(compressor.UncompressArgs);
+ for (std::vector<std::string>::const_iterator a = addArgs->begin();
+ a != addArgs->end(); ++a)
+ Args.push_back(a->c_str());
+ if (Comp == false && FileName.empty() == false)
+ {
+ Args.push_back("--stdout");
+ if (TemporaryFileName.empty() == false)
+ Args.push_back(TemporaryFileName.c_str());
+ else
+ Args.push_back(FileName.c_str());
+ }
+ Args.push_back(NULL);
+
+ execvp(Args[0],(char **)&Args[0]);
+ cerr << _("Failed to exec compressor ") << Args[0] << endl;
+ _exit(100);
+ }
+ if (Comp == true)
+ close(Pipe[0]);
+ else
+ close(Pipe[1]);
+ if (Comp == true || FileName.empty() == true)
+ close(d->compressed_fd);
+
return true;
}
/*}}}*/
errno = 0;
if (Actual != 0)
*Actual = 0;
-
+ *((char *)To) = '\0';
do
{
+#if APT_USE_ZLIB
if (d->gz != NULL)
Res = gzread(d->gz,To,Size);
else
+#endif
Res = read(iFd,To,Size);
if (Res < 0 && errno == EINTR)
continue;
To = (char *)To + Res;
Size -= Res;
+ d->seekpos += Res;
if (Actual != 0)
*Actual += Res;
}
files because of the naive implementation! */
char* FileFd::ReadLine(char *To, unsigned long long const Size)
{
+ *To = '\0';
+#if APT_USE_ZLIB
if (d->gz != NULL)
return gzgets(d->gz, To, Size);
+#endif
unsigned long long read = 0;
if (Read(To, Size, &read) == false)
errno = 0;
do
{
+#if APT_USE_ZLIB
if (d->gz != NULL)
Res = gzwrite(d->gz,From,Size);
else
+#endif
Res = write(iFd,From,Size);
if (Res < 0 && errno == EINTR)
continue;
From = (char *)From + Res;
Size -= Res;
+ d->seekpos += Res;
}
while (Res > 0 && Size > 0);
/* */
bool FileFd::Seek(unsigned long long To)
{
+ if (d->pipe == true)
+ {
+ // Our poor man seeking in pipes is costly, so try to avoid it
+ unsigned long long seekpos = Tell();
+ if (seekpos == To)
+ return true;
+ else if (seekpos < To)
+ return Skip(To - seekpos);
+
+ if ((d->openmode & ReadOnly) != ReadOnly)
+ return _error->Error("Reopen is only implemented for read-only files!");
+ close(iFd);
+ iFd = 0;
+ if (TemporaryFileName.empty() == false)
+ iFd = open(TemporaryFileName.c_str(), O_RDONLY);
+ else if (FileName.empty() == false)
+ iFd = open(FileName.c_str(), O_RDONLY);
+ else
+ {
+ if (d->compressed_fd > 0)
+ if (lseek(d->compressed_fd, 0, SEEK_SET) != 0)
+ iFd = d->compressed_fd;
+ if (iFd <= 0)
+ return _error->Error("Reopen is not implemented for pipes opened with FileFd::OpenDescriptor()!");
+ }
+
+ if (OpenInternDescriptor(d->openmode, d->compressor) == false)
+ return _error->Error("Seek on file %s because it couldn't be reopened", FileName.c_str());
+
+ if (To != 0)
+ return Skip(To);
+
+ d->seekpos = To;
+ return true;
+ }
int res;
+#if APT_USE_ZLIB
if (d->gz)
res = gzseek(d->gz,To,SEEK_SET);
else
+#endif
res = lseek(iFd,To,SEEK_SET);
if (res != (signed)To)
{
Flags |= Fail;
return _error->Error("Unable to seek to %llu", To);
}
-
+
+ d->seekpos = To;
return true;
}
/*}}}*/
bool FileFd::Skip(unsigned long long Over)
{
int res;
+#if APT_USE_ZLIB
if (d->gz != NULL)
res = gzseek(d->gz,Over,SEEK_CUR);
else
+#endif
res = lseek(iFd,Over,SEEK_CUR);
if (res < 0)
{
Flags |= Fail;
return _error->Error("Unable to seek ahead %llu",Over);
}
-
+ d->seekpos = res;
+
return true;
}
/*}}}*/
/* */
unsigned long long FileFd::Tell()
{
+ // In theory, we could just return seekpos here always instead of
+ // seeking around, but not all users of FileFd use always Seek() and co
+ // so d->seekpos isn't always true and we can just use it as a hint if
+ // we have nothing else, but not always as an authority…
+ if (d->pipe == true)
+ return d->seekpos;
+
off_t Res;
+#if APT_USE_ZLIB
if (d->gz != NULL)
Res = gztell(d->gz);
else
+#endif
Res = lseek(iFd,0,SEEK_CUR);
if (Res == (off_t)-1)
_error->Errno("lseek","Failed to determine the current file position");
+ d->seekpos = Res;
return Res;
}
/*}}}*/
unsigned long long FileFd::FileSize()
{
struct stat Buf;
-
- if (fstat(iFd,&Buf) != 0)
+ if (d->pipe == false && fstat(iFd,&Buf) != 0)
return _error->Errno("fstat","Unable to determine the file size");
+
+ // for compressor pipes st_size is undefined and at 'best' zero
+ if (d->pipe == true || S_ISFIFO(Buf.st_mode))
+ {
+ // we set it here, too, as we get the info here for free
+ // in theory the Open-methods should take care of it already
+ d->pipe = true;
+ if (stat(FileName.c_str(), &Buf) != 0)
+ return _error->Errno("stat","Unable to determine the file size");
+ }
+
return Buf.st_size;
}
/*}}}*/
{
unsigned long long size = FileSize();
+ // for compressor pipes st_size is undefined and at 'best' zero,
+ // so we 'read' the content and 'seek' back - see there
+ if (d->pipe == true)
+ {
+ unsigned long long const oldSeek = Tell();
+ char ignore[1000];
+ unsigned long long read = 0;
+ do {
+ Read(ignore, sizeof(ignore), &read);
+ } while(read != 0);
+ size = Tell();
+ Seek(oldSeek);
+ }
+#if APT_USE_ZLIB
// only check gzsize if we are actually a gzip file, just checking for
// "gz" is not sufficient as uncompressed files could be opened with
// gzopen in "direct" mode as well
- if (d->gz && !gzdirect(d->gz) && size > 0)
+ else if (d->gz && !gzdirect(d->gz) && size > 0)
{
/* unfortunately zlib.h doesn't provide a gzsize(), so we have to do
* this ourselves; the original (uncompressed) file size is the last 32
* bits of the file */
// FIXME: Size for gz-files is limited by 32bit… no largefile support
- off_t orig_pos = lseek(iFd, 0, SEEK_CUR);
if (lseek(iFd, -4, SEEK_END) < 0)
return _error->Errno("lseek","Unable to seek to end of gzipped file");
size = 0L;
size = tmp_size;
#endif
- if (lseek(iFd, orig_pos, SEEK_SET) < 0)
+ if (lseek(iFd, d->seekpos, SEEK_SET) < 0)
return _error->Errno("lseek","Unable to seek in gzipped file");
return size;
}
+#endif
return size;
}
time_t FileFd::ModificationTime()
{
struct stat Buf;
- if (fstat(iFd,&Buf) != 0)
+ if (d->pipe == false && fstat(iFd,&Buf) != 0)
{
_error->Errno("fstat","Unable to determine the modification time of file %s", FileName.c_str());
return 0;
}
+
+ // for compressor pipes st_size is undefined and at 'best' zero
+ if (d->pipe == true || S_ISFIFO(Buf.st_mode))
+ {
+ // we set it here, too, as we get the info here for free
+ // in theory the Open-methods should take care of it already
+ d->pipe = true;
+ if (stat(FileName.c_str(), &Buf) != 0)
+ {
+ _error->Errno("fstat","Unable to determine the modification time of file %s", FileName.c_str());
+ return 0;
+ }
+ }
+
return Buf.st_mtime;
}
/*}}}*/
bool Res = true;
if ((Flags & AutoClose) == AutoClose)
{
+#if APT_USE_ZLIB
if (d != NULL && d->gz != NULL) {
int const e = gzclose(d->gz);
// gzdopen() on empty files always fails with "buffer error" here, ignore that
if (e != 0 && e != Z_BUF_ERROR)
Res &= _error->Errno("close",_("Problem closing the gzip file %s"), FileName.c_str());
} else
+#endif
if (iFd > 0 && close(iFd) != 0)
Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str());
}
if (d != NULL)
{
+ if (d->compressor_pid > 0)
+ ExecWait(d->compressor_pid, "FileFdCompressor", true);
delete d;
d = NULL;
}
return true;
}
/*}}}*/
-gzFile FileFd::gzFd() {return d->gz;};
+
+gzFile FileFd::gzFd() { return (gzFile) d->gz; }
projects / apt.git / blobdiff