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-rw-r--r--apt-pkg/contrib/fileutl.cc162
1 files changed, 133 insertions, 29 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 1808489d7..9e3611b26 100644
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -44,14 +44,11 @@
#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!"
+#ifdef HAVE_ZLIB
+ #include <zlib.h>
+#endif
+#ifdef HAVE_BZ2
+ #include <bzlib.h>
#endif
#ifdef WORDS_BIGENDIAN
@@ -65,18 +62,24 @@ using namespace std;
class FileFdPrivate {
public:
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
gzFile gz;
#else
void* gz;
#endif
+#ifdef HAVE_BZ2
+ BZFILE* bz2;
+#else
+ void* bz2;
+#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),
+ FileFdPrivate() : gz(NULL), bz2(NULL),
+ compressed_fd(-1), compressor_pid(-1), pipe(false),
openmode(0), seekpos(0) {};
};
@@ -835,7 +838,6 @@ bool FileFd::Open(string FileName,unsigned int const Mode,CompressMode Compress,
if (Compress == Auto && (Mode & WriteOnly) == WriteOnly)
return _error->Error("Autodetection on %s only works in ReadOnly openmode!", FileName.c_str());
- // 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)
@@ -1016,7 +1018,7 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
d->compressor = compressor;
if (compressor.Name == "." || compressor.Binary.empty() == true)
return true;
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
else if (compressor.Name == "gzip")
{
if ((Mode & ReadWrite) == ReadWrite)
@@ -1024,13 +1026,29 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
else if ((Mode & WriteOnly) == WriteOnly)
d->gz = gzdopen(iFd, "w");
else
- d->gz = gzdopen (iFd, "r");
+ d->gz = gzdopen(iFd, "r");
if (d->gz == NULL)
return false;
Flags |= Compressed;
return true;
}
#endif
+#ifdef HAVE_BZ2
+ else if (compressor.Name == "bzip2")
+ {
+ if ((Mode & ReadWrite) == ReadWrite)
+ d->bz2 = BZ2_bzdopen(iFd, "r+");
+ else if ((Mode & WriteOnly) == WriteOnly)
+ d->bz2 = BZ2_bzdopen(iFd, "w");
+ else
+ d->bz2 = BZ2_bzdopen(iFd, "r");
+ if (d->bz2 == 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());
@@ -1137,9 +1155,14 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
*((char *)To) = '\0';
do
{
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d->gz != NULL)
- Res = gzread(d->gz,To,Size);
+ Res = gzread(d->gz,To,Size);
+ else
+#endif
+#ifdef HAVE_BZ2
+ if (d->bz2 != NULL)
+ Res = BZ2_bzread(d->bz2,To,Size);
else
#endif
Res = read(iFd,To,Size);
@@ -1149,7 +1172,7 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
if (errno == EINTR)
continue;
Flags |= Fail;
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d->gz != NULL)
{
int err;
@@ -1158,6 +1181,15 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
return _error->Error("gzread: %s (%d: %s)", _("Read error"), err, errmsg);
}
#endif
+#ifdef HAVE_BZ2
+ if (d->bz2 != NULL)
+ {
+ int err;
+ char const * const errmsg = BZ2_bzerror(d->bz2, &err);
+ if (err != BZ_IO_ERROR)
+ return _error->Error("BZ2_bzread: %s (%d: %s)", _("Read error"), err, errmsg);
+ }
+#endif
return _error->Errno("read",_("Read error"));
}
@@ -1190,7 +1222,7 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
char* FileFd::ReadLine(char *To, unsigned long long const Size)
{
*To = '\0';
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d->gz != NULL)
return gzgets(d->gz, To, Size);
#endif
@@ -1221,17 +1253,40 @@ bool FileFd::Write(const void *From,unsigned long long Size)
errno = 0;
do
{
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d->gz != NULL)
Res = gzwrite(d->gz,From,Size);
else
#endif
+#ifdef HAVE_BZ2
+ if (d->bz2 != NULL)
+ Res = BZ2_bzwrite(d->bz2,(void*)From,Size);
+ else
+#endif
Res = write(iFd,From,Size);
if (Res < 0 && errno == EINTR)
continue;
if (Res < 0)
{
Flags |= Fail;
+#ifdef HAVE_ZLIB
+ if (d->gz != NULL)
+ {
+ int err;
+ char const * const errmsg = gzerror(d->gz, &err);
+ if (err != Z_ERRNO)
+ return _error->Error("gzwrite: %s (%d: %s)", _("Write error"), err, errmsg);
+ }
+#endif
+#ifdef HAVE_BZ2
+ if (d->bz2 != NULL)
+ {
+ int err;
+ char const * const errmsg = BZ2_bzerror(d->bz2, &err);
+ if (err != BZ_IO_ERROR)
+ return _error->Error("BZ2_bzwrite: %s (%d: %s)", _("Write error"), err, errmsg);
+ }
+#endif
return _error->Errno("write",_("Write error"));
}
@@ -1247,13 +1302,39 @@ bool FileFd::Write(const void *From,unsigned long long Size)
Flags |= Fail;
return _error->Error(_("write, still have %llu to write but couldn't"), Size);
}
+bool FileFd::Write(int Fd, const void *From, unsigned long long Size)
+{
+ int Res;
+ errno = 0;
+ do
+ {
+ Res = write(Fd,From,Size);
+ if (Res < 0 && errno == EINTR)
+ continue;
+ if (Res < 0)
+ return _error->Errno("write",_("Write error"));
+
+ From = (char *)From + Res;
+ Size -= Res;
+ }
+ while (Res > 0 && Size > 0);
+
+ if (Size == 0)
+ return true;
+
+ return _error->Error(_("write, still have %llu to write but couldn't"), Size);
+}
/*}}}*/
// FileFd::Seek - Seek in the file /*{{{*/
// ---------------------------------------------------------------------
/* */
bool FileFd::Seek(unsigned long long To)
{
- if (d->pipe == true)
+ if (d->pipe == true
+#ifdef HAVE_BZ2
+ || d->bz2 != NULL
+#endif
+ )
{
// Our poor man seeking in pipes is costly, so try to avoid it
unsigned long long seekpos = Tell();
@@ -1264,6 +1345,10 @@ bool FileFd::Seek(unsigned long long To)
if ((d->openmode & ReadOnly) != ReadOnly)
return _error->Error("Reopen is only implemented for read-only files!");
+#ifdef HAVE_BZ2
+ if (d->bz2 != NULL)
+ BZ2_bzclose(d->bz2);
+#endif
close(iFd);
iFd = 0;
if (TemporaryFileName.empty() == false)
@@ -1289,7 +1374,7 @@ bool FileFd::Seek(unsigned long long To)
return true;
}
int res;
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d->gz)
res = gzseek(d->gz,To,SEEK_SET);
else
@@ -1310,7 +1395,11 @@ bool FileFd::Seek(unsigned long long To)
/* */
bool FileFd::Skip(unsigned long long Over)
{
- if (d->pipe == true)
+ if (d->pipe == true
+#ifdef HAVE_BZ2
+ || d->bz2 != NULL
+#endif
+ )
{
d->seekpos += Over;
char buffer[1024];
@@ -1325,7 +1414,7 @@ bool FileFd::Skip(unsigned long long Over)
}
int res;
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d->gz != NULL)
res = gzseek(d->gz,Over,SEEK_CUR);
else
@@ -1346,11 +1435,13 @@ bool FileFd::Skip(unsigned long long Over)
/* */
bool FileFd::Truncate(unsigned long long To)
{
- if (d->gz != NULL)
+#if defined HAVE_ZLIB || defined HAVE_BZ2
+ if (d->gz != NULL || d->bz2 != NULL)
{
Flags |= Fail;
- return _error->Error("Truncating gzipped files is not implemented (%s)", FileName.c_str());
+ return _error->Error("Truncating compressed files is not implemented (%s)", FileName.c_str());
}
+#endif
if (ftruncate(iFd,To) != 0)
{
Flags |= Fail;
@@ -1369,11 +1460,15 @@ unsigned long long FileFd::Tell()
// 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)
+ if (d->pipe == true
+#ifdef HAVE_BZ2
+ || d->bz2 != NULL
+#endif
+ )
return d->seekpos;
off_t Res;
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d->gz != NULL)
Res = gztell(d->gz);
else
@@ -1416,7 +1511,11 @@ unsigned long long FileFd::Size()
// 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)
+ if (d->pipe == true
+#ifdef HAVE_BZ2
+ || (d->bz2 && size > 0)
+#endif
+ )
{
unsigned long long const oldSeek = Tell();
char ignore[1000];
@@ -1427,7 +1526,7 @@ unsigned long long FileFd::Size()
size = Tell();
Seek(oldSeek);
}
-#if APT_USE_ZLIB
+#ifdef HAVE_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
@@ -1500,7 +1599,7 @@ bool FileFd::Close()
bool Res = true;
if ((Flags & AutoClose) == AutoClose)
{
-#if APT_USE_ZLIB
+#ifdef HAVE_ZLIB
if (d != NULL && d->gz != NULL) {
int const e = gzclose(d->gz);
// gzdclose() on empty files always fails with "buffer error" here, ignore that
@@ -1508,6 +1607,11 @@ bool FileFd::Close()
Res &= _error->Errno("close",_("Problem closing the gzip file %s"), FileName.c_str());
} else
#endif
+#ifdef HAVE_BZ2
+ if (d != NULL && d->bz2 != NULL)
+ BZ2_bzclose(d->bz2);
+ else
+#endif
if (iFd > 0 && close(iFd) != 0)
Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str());
}
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