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-rw-r--r--apt-pkg/contrib/fileutl.cc280
1 files changed, 202 insertions, 78 deletions
diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc
index 9e3611b26..960616f33 100644
--- a/apt-pkg/contrib/fileutl.cc
+++ b/apt-pkg/contrib/fileutl.cc
@@ -81,6 +81,31 @@ class FileFdPrivate {
FileFdPrivate() : gz(NULL), bz2(NULL),
compressed_fd(-1), compressor_pid(-1), pipe(false),
openmode(0), seekpos(0) {};
+ bool CloseDown(std::string const &FileName)
+ {
+ bool Res = true;
+#ifdef HAVE_ZLIB
+ if (gz != NULL) {
+ int const e = gzclose(gz);
+ gz = NULL;
+ // gzdclose() 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());
+ }
+#endif
+#ifdef HAVE_BZ2
+ if (bz2 != NULL) {
+ BZ2_bzclose(bz2);
+ bz2 = NULL;
+ }
+#endif
+ if (compressor_pid > 0)
+ ExecWait(compressor_pid, "FileFdCompressor", true);
+ compressor_pid = -1;
+
+ return Res;
+ }
+ ~FileFdPrivate() { CloseDown(""); }
};
// RunScripts - Run a set of scripts from a configuration subtree /*{{{*/
@@ -827,6 +852,26 @@ bool ExecWait(pid_t Pid,const char *Name,bool Reap)
}
/*}}}*/
+// StartsWithGPGClearTextSignature - Check if a file is Pgp/GPG clearsigned /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool StartsWithGPGClearTextSignature(string const &FileName)
+{
+ static const char* SIGMSG = "-----BEGIN PGP SIGNED MESSAGE-----\n";
+ char buffer[strlen(SIGMSG)+1];
+ FILE* gpg = fopen(FileName.c_str(), "r");
+ if (gpg == NULL)
+ return false;
+
+ char const * const test = fgets(buffer, sizeof(buffer), gpg);
+ fclose(gpg);
+ if (test == NULL || strcmp(buffer, SIGMSG) != 0)
+ return false;
+
+ return true;
+}
+
+
// FileFd::Open - Open a file /*{{{*/
// ---------------------------------------------------------------------
/* The most commonly used open mode combinations are given with Mode */
@@ -905,8 +950,6 @@ bool FileFd::Open(string FileName,unsigned int const Mode,CompressMode Compress,
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)
@@ -1000,10 +1043,21 @@ bool FileFd::OpenDescriptor(int Fd, unsigned int const Mode, CompressMode Compre
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 (AutoClose == false && (
+#ifdef HAVE_ZLIB
+ compressor.Name == "gzip" ||
+#endif
+#ifdef HAVE_BZ2
+ compressor.Name == "bzip2" ||
+#endif
+ false))
+ {
+ // Need to duplicate fd here or gzclose for cleanup will close the fd as well
+ iFd = dup(Fd);
+ }
+ else
+ iFd = Fd;
this->FileName = "";
if (OpenInternDescriptor(Mode, compressor) == false)
{
@@ -1015,12 +1069,24 @@ bool FileFd::OpenDescriptor(int Fd, unsigned int const Mode, APT::Configuration:
}
bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::Compressor const &compressor)
{
- d->compressor = compressor;
if (compressor.Name == "." || compressor.Binary.empty() == true)
return true;
+
+ if (d == NULL)
+ {
+ d = new FileFdPrivate();
+ d->openmode = Mode;
+ d->compressor = compressor;
+ }
+
#ifdef HAVE_ZLIB
- else if (compressor.Name == "gzip")
+ if (compressor.Name == "gzip")
{
+ if (d->gz != NULL)
+ {
+ gzclose(d->gz);
+ d->gz = NULL;
+ }
if ((Mode & ReadWrite) == ReadWrite)
d->gz = gzdopen(iFd, "r+");
else if ((Mode & WriteOnly) == WriteOnly)
@@ -1034,8 +1100,13 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
}
#endif
#ifdef HAVE_BZ2
- else if (compressor.Name == "bzip2")
+ if (compressor.Name == "bzip2")
{
+ if (d->bz2 != NULL)
+ {
+ BZ2_bzclose(d->bz2);
+ d->bz2 = NULL;
+ }
if ((Mode & ReadWrite) == ReadWrite)
d->bz2 = BZ2_bzdopen(iFd, "r+");
else if ((Mode & WriteOnly) == WriteOnly)
@@ -1049,14 +1120,20 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
}
#endif
+ // collect zombies here in case we reopen
+ if (d->compressor_pid > 0)
+ ExecWait(d->compressor_pid, "FileFdCompressor", true);
if ((Mode & ReadWrite) == ReadWrite)
+ {
+ Flags |= Fail;
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)
{
+ // Handle 'decompression' of empty files
struct stat Buf;
fstat(iFd, &Buf);
if (Buf.st_size == 0 && S_ISFIFO(Buf.st_mode) == false)
@@ -1065,13 +1142,19 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
// 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);
+ iFd = -1;
+ }
}
// Create a data pipe
int Pipe[2] = {-1,-1};
if (pipe(Pipe) != 0)
+ {
+ Flags |= Fail;
return _error->Errno("pipe",_("Failed to create subprocess IPC"));
+ }
for (int J = 0; J != 2; J++)
SetCloseExec(Pipe[J],true);
@@ -1098,6 +1181,12 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
dup2(d->compressed_fd,STDIN_FILENO);
dup2(Pipe[1],STDOUT_FILENO);
}
+ int const nullfd = open("/dev/null", O_WRONLY);
+ if (nullfd != -1)
+ {
+ dup2(nullfd,STDERR_FILENO);
+ close(nullfd);
+ }
SetCloseExec(STDOUT_FILENO,false);
SetCloseExec(STDIN_FILENO,false);
@@ -1127,8 +1216,6 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
close(Pipe[0]);
else
close(Pipe[1]);
- if (Comp == true || FileName.empty() == true)
- close(d->compressed_fd);
return true;
}
@@ -1140,6 +1227,12 @@ bool FileFd::OpenInternDescriptor(unsigned int const Mode, APT::Configuration::C
FileFd::~FileFd()
{
Close();
+ if (d != NULL)
+ {
+ d->CloseDown(FileName);
+ delete d;
+ d = NULL;
+ }
}
/*}}}*/
// FileFd::Read - Read a bit of the file /*{{{*/
@@ -1156,12 +1249,12 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
do
{
#ifdef HAVE_ZLIB
- if (d->gz != NULL)
+ if (d != NULL && d->gz != NULL)
Res = gzread(d->gz,To,Size);
else
#endif
#ifdef HAVE_BZ2
- if (d->bz2 != NULL)
+ if (d != NULL && d->bz2 != NULL)
Res = BZ2_bzread(d->bz2,To,Size);
else
#endif
@@ -1173,7 +1266,7 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
continue;
Flags |= Fail;
#ifdef HAVE_ZLIB
- if (d->gz != NULL)
+ if (d != NULL && d->gz != NULL)
{
int err;
char const * const errmsg = gzerror(d->gz, &err);
@@ -1182,7 +1275,7 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
}
#endif
#ifdef HAVE_BZ2
- if (d->bz2 != NULL)
+ if (d != NULL && d->bz2 != NULL)
{
int err;
char const * const errmsg = BZ2_bzerror(d->bz2, &err);
@@ -1195,7 +1288,8 @@ bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
To = (char *)To + Res;
Size -= Res;
- d->seekpos += Res;
+ if (d != NULL)
+ d->seekpos += Res;
if (Actual != 0)
*Actual += Res;
}
@@ -1223,7 +1317,7 @@ char* FileFd::ReadLine(char *To, unsigned long long const Size)
{
*To = '\0';
#ifdef HAVE_ZLIB
- if (d->gz != NULL)
+ if (d != NULL && d->gz != NULL)
return gzgets(d->gz, To, Size);
#endif
@@ -1254,12 +1348,12 @@ bool FileFd::Write(const void *From,unsigned long long Size)
do
{
#ifdef HAVE_ZLIB
- if (d->gz != NULL)
+ if (d != NULL && d->gz != NULL)
Res = gzwrite(d->gz,From,Size);
else
#endif
#ifdef HAVE_BZ2
- if (d->bz2 != NULL)
+ if (d != NULL && d->bz2 != NULL)
Res = BZ2_bzwrite(d->bz2,(void*)From,Size);
else
#endif
@@ -1270,7 +1364,7 @@ bool FileFd::Write(const void *From,unsigned long long Size)
{
Flags |= Fail;
#ifdef HAVE_ZLIB
- if (d->gz != NULL)
+ if (d != NULL && d->gz != NULL)
{
int err;
char const * const errmsg = gzerror(d->gz, &err);
@@ -1279,7 +1373,7 @@ bool FileFd::Write(const void *From,unsigned long long Size)
}
#endif
#ifdef HAVE_BZ2
- if (d->bz2 != NULL)
+ if (d != NULL && d->bz2 != NULL)
{
int err;
char const * const errmsg = BZ2_bzerror(d->bz2, &err);
@@ -1292,7 +1386,8 @@ bool FileFd::Write(const void *From,unsigned long long Size)
From = (char *)From + Res;
Size -= Res;
- d->seekpos += Res;
+ if (d != NULL)
+ d->seekpos += Res;
}
while (Res > 0 && Size > 0);
@@ -1330,11 +1425,11 @@ bool FileFd::Write(int Fd, const void *From, unsigned long long Size)
/* */
bool FileFd::Seek(unsigned long long To)
{
- if (d->pipe == true
+ if (d != NULL && (d->pipe == true
#ifdef HAVE_BZ2
- || d->bz2 != NULL
+ || d->bz2 != NULL
#endif
- )
+ ))
{
// Our poor man seeking in pipes is costly, so try to avoid it
unsigned long long seekpos = Tell();
@@ -1344,13 +1439,17 @@ bool FileFd::Seek(unsigned long long To)
return Skip(To - seekpos);
if ((d->openmode & ReadOnly) != ReadOnly)
+ {
+ Flags |= Fail;
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 (iFd != -1)
+ close(iFd);
+ iFd = -1;
if (TemporaryFileName.empty() == false)
iFd = open(TemporaryFileName.c_str(), O_RDONLY);
else if (FileName.empty() == false)
@@ -1360,12 +1459,18 @@ bool FileFd::Seek(unsigned long long To)
if (d->compressed_fd > 0)
if (lseek(d->compressed_fd, 0, SEEK_SET) != 0)
iFd = d->compressed_fd;
- if (iFd <= 0)
+ if (iFd < 0)
+ {
+ Flags |= Fail;
return _error->Error("Reopen is not implemented for pipes opened with FileFd::OpenDescriptor()!");
+ }
}
if (OpenInternDescriptor(d->openmode, d->compressor) == false)
+ {
+ Flags |= Fail;
return _error->Error("Seek on file %s because it couldn't be reopened", FileName.c_str());
+ }
if (To != 0)
return Skip(To);
@@ -1375,7 +1480,7 @@ bool FileFd::Seek(unsigned long long To)
}
int res;
#ifdef HAVE_ZLIB
- if (d->gz)
+ if (d != NULL && d->gz)
res = gzseek(d->gz,To,SEEK_SET);
else
#endif
@@ -1386,7 +1491,8 @@ bool FileFd::Seek(unsigned long long To)
return _error->Error("Unable to seek to %llu", To);
}
- d->seekpos = To;
+ if (d != NULL)
+ d->seekpos = To;
return true;
}
/*}}}*/
@@ -1395,11 +1501,11 @@ bool FileFd::Seek(unsigned long long To)
/* */
bool FileFd::Skip(unsigned long long Over)
{
- if (d->pipe == true
+ if (d != NULL && (d->pipe == true
#ifdef HAVE_BZ2
- || d->bz2 != NULL
+ || d->bz2 != NULL
#endif
- )
+ ))
{
d->seekpos += Over;
char buffer[1024];
@@ -1407,7 +1513,10 @@ bool FileFd::Skip(unsigned long long Over)
{
unsigned long long toread = std::min((unsigned long long) sizeof(buffer), Over);
if (Read(buffer, toread) == false)
+ {
+ Flags |= Fail;
return _error->Error("Unable to seek ahead %llu",Over);
+ }
Over -= toread;
}
return true;
@@ -1415,7 +1524,7 @@ bool FileFd::Skip(unsigned long long Over)
int res;
#ifdef HAVE_ZLIB
- if (d->gz != NULL)
+ if (d != NULL && d->gz != NULL)
res = gzseek(d->gz,Over,SEEK_CUR);
else
#endif
@@ -1425,7 +1534,8 @@ bool FileFd::Skip(unsigned long long Over)
Flags |= Fail;
return _error->Error("Unable to seek ahead %llu",Over);
}
- d->seekpos = res;
+ if (d != NULL)
+ d->seekpos = res;
return true;
}
@@ -1436,7 +1546,7 @@ bool FileFd::Skip(unsigned long long Over)
bool FileFd::Truncate(unsigned long long To)
{
#if defined HAVE_ZLIB || defined HAVE_BZ2
- if (d->gz != NULL || d->bz2 != NULL)
+ if (d != NULL && (d->gz != NULL || d->bz2 != NULL))
{
Flags |= Fail;
return _error->Error("Truncating compressed files is not implemented (%s)", FileName.c_str());
@@ -1460,23 +1570,27 @@ 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 != NULL && (d->pipe == true
#ifdef HAVE_BZ2
- || d->bz2 != NULL
+ || d->bz2 != NULL
#endif
- )
+ ))
return d->seekpos;
off_t Res;
#ifdef HAVE_ZLIB
- if (d->gz != NULL)
+ if (d != NULL && d->gz != NULL)
Res = gztell(d->gz);
else
#endif
Res = lseek(iFd,0,SEEK_CUR);
if (Res == (off_t)-1)
+ {
+ Flags |= Fail;
_error->Errno("lseek","Failed to determine the current file position");
- d->seekpos = Res;
+ }
+ if (d != NULL)
+ d->seekpos = Res;
return Res;
}
/*}}}*/
@@ -1486,17 +1600,24 @@ unsigned long long FileFd::Tell()
unsigned long long FileFd::FileSize()
{
struct stat Buf;
- if (d->pipe == false && fstat(iFd,&Buf) != 0)
+ if ((d == NULL || d->pipe == false) && fstat(iFd,&Buf) != 0)
+ {
+ Flags |= Fail;
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))
+ if ((d != NULL && 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 (d != NULL)
+ d->pipe = true;
if (stat(FileName.c_str(), &Buf) != 0)
+ {
+ Flags |= Fail;
return _error->Errno("stat","Unable to determine the file size");
+ }
}
return Buf.st_size;
@@ -1511,11 +1632,11 @@ 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 != NULL && (d->pipe == true
#ifdef HAVE_BZ2
- || (d->bz2 && size > 0)
+ || (d->bz2 && size > 0)
#endif
- )
+ ))
{
unsigned long long const oldSeek = Tell();
char ignore[1000];
@@ -1530,7 +1651,7 @@ unsigned long long FileFd::Size()
// 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
- else if (d->gz && !gzdirect(d->gz) && size > 0)
+ else if (d != NULL && d->gz && !gzdirect(d->gz) && size > 0)
{
off_t const oldPos = lseek(iFd,0,SEEK_CUR);
/* unfortunately zlib.h doesn't provide a gzsize(), so we have to do
@@ -1538,10 +1659,16 @@ unsigned long long FileFd::Size()
* bits of the file */
// FIXME: Size for gz-files is limited by 32bit… no largefile support
if (lseek(iFd, -4, SEEK_END) < 0)
- return _error->Errno("lseek","Unable to seek to end of gzipped file");
+ {
+ Flags |= Fail;
+ return _error->Errno("lseek","Unable to seek to end of gzipped file");
+ }
size = 0L;
if (read(iFd, &size, 4) != 4)
- return _error->Errno("read","Unable to read original size of gzipped file");
+ {
+ Flags |= Fail;
+ return _error->Errno("read","Unable to read original size of gzipped file");
+ }
#ifdef WORDS_BIGENDIAN
uint32_t tmp_size = size;
@@ -1551,7 +1678,10 @@ unsigned long long FileFd::Size()
#endif
if (lseek(iFd, oldPos, SEEK_SET) < 0)
- return _error->Errno("lseek","Unable to seek in gzipped file");
+ {
+ Flags |= Fail;
+ return _error->Errno("lseek","Unable to seek in gzipped file");
+ }
return size;
}
@@ -1566,20 +1696,23 @@ unsigned long long FileFd::Size()
time_t FileFd::ModificationTime()
{
struct stat Buf;
- if (d->pipe == false && fstat(iFd,&Buf) != 0)
+ if ((d == NULL || d->pipe == false) && fstat(iFd,&Buf) != 0)
{
+ Flags |= Fail;
_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))
+ if ((d != NULL && 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 (d != NULL)
+ d->pipe = true;
if (stat(FileName.c_str(), &Buf) != 0)
{
+ Flags |= Fail;
_error->Errno("fstat","Unable to determine the modification time of file %s", FileName.c_str());
return 0;
}
@@ -1599,24 +1732,18 @@ bool FileFd::Close()
bool Res = true;
if ((Flags & AutoClose) == AutoClose)
{
-#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
- if (e != 0 && e != Z_BUF_ERROR)
- 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());
+ if ((Flags & Compressed) != Compressed && iFd > 0 && close(iFd) != 0)
+ Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str());
+
+ if (d != NULL)
+ {
+ Res &= d->CloseDown(FileName);
+ delete d;
+ d = NULL;
+ }
}
- if ((Flags & Replace) == Replace && iFd >= 0) {
+ if ((Flags & Replace) == Replace) {
if (rename(TemporaryFileName.c_str(), FileName.c_str()) != 0)
Res &= _error->Errno("rename",_("Problem renaming the file %s to %s"), TemporaryFileName.c_str(), FileName.c_str());
@@ -1631,14 +1758,8 @@ bool FileFd::Close()
if (unlink(FileName.c_str()) != 0)
Res &= _error->WarningE("unlnk",_("Problem unlinking the file %s"), FileName.c_str());
- if (d != NULL)
- {
- if (d->compressor_pid > 0)
- ExecWait(d->compressor_pid, "FileFdCompressor", true);
- delete d;
- d = NULL;
- }
-
+ if (Res == false)
+ Flags |= Fail;
return Res;
}
/*}}}*/
@@ -1649,7 +1770,10 @@ bool FileFd::Sync()
{
#ifdef _POSIX_SYNCHRONIZED_IO
if (fsync(iFd) != 0)
+ {
+ Flags |= Fail;
return _error->Errno("sync",_("Problem syncing the file"));
+ }
#endif
return true;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-12 12:57:58 +0000