Most of this source is placed in the Public Domain, do with it what
you will
It was originally written by Jason Gunthorpe <jgg@debian.org>.
+ FileFd gzip support added by Martin Pitt <martin.pitt@canonical.com>
The exception is RunScripts() it is under the GPLv2
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
+#include <config.h>
+
#include <apt-pkg/fileutl.h>
+#include <apt-pkg/strutl.h>
#include <apt-pkg/error.h>
#include <apt-pkg/sptr.h>
#include <apt-pkg/configuration.h>
-#include <apti18n.h>
-
#include <cstdlib>
#include <cstring>
+#include <cstdio>
#include <iostream>
#include <unistd.h>
#include <errno.h>
#include <set>
#include <algorithm>
+
+#ifdef WORDS_BIGENDIAN
+#include <inttypes.h>
+#endif
+
+#include <apti18n.h>
/*}}}*/
using namespace std;
// This is the child
if (Child == 0)
{
+ if (_config->FindDir("DPkg::Chroot-Directory","/") != "/")
+ {
+ std::cerr << "Chrooting into "
+ << _config->FindDir("DPkg::Chroot-Directory")
+ << std::endl;
+ if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0)
+ _exit(100);
+ }
+
if (chdir("/tmp/") != 0)
_exit(100);
// Buffered copy between fds
SPtrArray<unsigned char> Buf = new unsigned char[64000];
- unsigned long Size = From.Size();
+ unsigned long long Size = From.Size();
while (Size != 0)
{
- unsigned long ToRead = Size;
+ unsigned long long ToRead = Size;
if (Size > 64000)
ToRead = 64000;
/*}}}*/
// FileExists - Check if a file exists /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* Beware: Directories are also files! */
bool FileExists(string File)
{
struct stat Buf;
return true;
}
/*}}}*/
+// RealFileExists - Check if a file exists and if it is really a file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool RealFileExists(string File)
+{
+ struct stat Buf;
+ if (stat(File.c_str(),&Buf) != 0)
+ return false;
+ return ((Buf.st_mode & S_IFREG) != 0);
+}
+ /*}}}*/
+// DirectoryExists - Check if a directory exists and is really one /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool DirectoryExists(string const &Path)
+{
+ struct stat Buf;
+ if (stat(Path.c_str(),&Buf) != 0)
+ return false;
+ return ((Buf.st_mode & S_IFDIR) != 0);
+}
+ /*}}}*/
+// CreateDirectory - poor man's mkdir -p guarded by a parent directory /*{{{*/
+// ---------------------------------------------------------------------
+/* This method will create all directories needed for path in good old
+ mkdir -p style but refuses to do this if Parent is not a prefix of
+ this Path. Example: /var/cache/ and /var/cache/apt/archives are given,
+ so it will create apt/archives if /var/cache exists - on the other
+ hand if the parent is /var/lib the creation will fail as this path
+ is not a parent of the path to be generated. */
+bool CreateDirectory(string const &Parent, string const &Path)
+{
+ if (Parent.empty() == true || Path.empty() == true)
+ return false;
+
+ if (DirectoryExists(Path) == true)
+ return true;
+
+ if (DirectoryExists(Parent) == false)
+ return false;
+
+ // we are not going to create directories "into the blue"
+ if (Path.find(Parent, 0) != 0)
+ return false;
+
+ vector<string> const dirs = VectorizeString(Path.substr(Parent.size()), '/');
+ string progress = Parent;
+ for (vector<string>::const_iterator d = dirs.begin(); d != dirs.end(); ++d)
+ {
+ if (d->empty() == true)
+ continue;
+
+ progress.append("/").append(*d);
+ if (DirectoryExists(progress) == true)
+ continue;
+
+ if (mkdir(progress.c_str(), 0755) != 0)
+ return false;
+ }
+ return true;
+}
+ /*}}}*/
+// CreateAPTDirectoryIfNeeded - ensure that the given directory exists /*{{{*/
+// ---------------------------------------------------------------------
+/* a small wrapper around CreateDirectory to check if it exists and to
+ remove the trailing "/apt/" from the parent directory if needed */
+bool CreateAPTDirectoryIfNeeded(string const &Parent, string const &Path)
+{
+ if (DirectoryExists(Path) == true)
+ return true;
+
+ size_t const len = Parent.size();
+ if (len > 5 && Parent.find("/apt/", len - 6, 5) == len - 5)
+ {
+ if (CreateDirectory(Parent.substr(0,len-5), Path) == true)
+ return true;
+ }
+ else if (CreateDirectory(Parent, Path) == true)
+ return true;
+
+ return false;
+}
+ /*}}}*/
// GetListOfFilesInDir - returns a vector of files in the given dir /*{{{*/
// ---------------------------------------------------------------------
/* If an extension is given only files with this extension are included
}
std::vector<string> List;
+
+ if (DirectoryExists(Dir.c_str()) == false)
+ {
+ _error->Error(_("List of files can't be created as '%s' is not a directory"), Dir.c_str());
+ return List;
+ }
+
+ Configuration::MatchAgainstConfig SilentIgnore("Dir::Ignore-Files-Silently");
DIR *D = opendir(Dir.c_str());
if (D == 0)
{
if (Ent->d_name[0] == '.')
continue;
+ // Make sure it is a file and not something else
+ string const File = flCombine(Dir,Ent->d_name);
+#ifdef _DIRENT_HAVE_D_TYPE
+ if (Ent->d_type != DT_REG)
+#endif
+ {
+ if (RealFileExists(File.c_str()) == false)
+ {
+ if (SilentIgnore.Match(Ent->d_name) == false)
+ _error->Notice(_("Ignoring '%s' in directory '%s' as it is not a regular file"), Ent->d_name, Dir.c_str());
+ continue;
+ }
+ }
+
// check for accepted extension:
// no extension given -> periods are bad as hell!
// extensions given -> "" extension allows no extension
{
if (Debug == true)
std::clog << "Bad file: " << Ent->d_name << " → no extension" << std::endl;
+ if (SilentIgnore.Match(Ent->d_name) == false)
+ _error->Notice(_("Ignoring file '%s' in directory '%s' as it has no filename extension"), Ent->d_name, Dir.c_str());
continue;
}
}
{
if (Debug == true)
std::clog << "Bad file: " << Ent->d_name << " → bad extension »" << flExtension(Ent->d_name) << "«" << std::endl;
+ if (SilentIgnore.Match(Ent->d_name) == false)
+ _error->Notice(_("Ignoring file '%s' in directory '%s' as it has an invalid filename extension"), Ent->d_name, Dir.c_str());
continue;
}
}
continue;
}
- // Make sure it is a file and not something else
- string const File = flCombine(Dir,Ent->d_name);
- struct stat St;
- if (stat(File.c_str(),&St) != 0 || S_ISREG(St.st_mode) == 0)
- {
- if (Debug == true)
- std::clog << "Bad file: " << Ent->d_name << " → stat says not a good file" << std::endl;
- continue;
- }
-
if (Debug == true)
std::clog << "Accept file: " << Ent->d_name << " in " << Dir << std::endl;
List.push_back(File);
return S;
}
/*}}}*/
+// GetModificationTime - Get the mtime of the given file or -1 on error /*{{{*/
+// ---------------------------------------------------------------------
+/* We return / on failure. */
+time_t GetModificationTime(string const &Path)
+{
+ struct stat St;
+ if (stat(Path.c_str(), &St) < 0)
+ return -1;
+ return St.st_mtime;
+}
+ /*}}}*/
// flNotDir - Strip the directory from the filename /*{{{*/
// ---------------------------------------------------------------------
/* */
// FileFd::Open - Open a file /*{{{*/
// ---------------------------------------------------------------------
/* The most commonly used open mode combinations are given with Mode */
-bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms)
+bool FileFd::Open(string FileName,OpenMode Mode,CompressMode Compress, unsigned long Perms)
{
+ if (Mode == ReadOnlyGzip)
+ return Open(FileName, ReadOnly, Gzip, Perms);
Close();
Flags = AutoClose;
- switch (Mode)
- {
- case ReadOnly:
- iFd = open(FileName.c_str(),O_RDONLY);
- break;
-
- case WriteEmpty:
- {
- struct stat Buf;
- if (lstat(FileName.c_str(),&Buf) == 0 && S_ISLNK(Buf.st_mode))
- unlink(FileName.c_str());
- iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_TRUNC,Perms);
- break;
- }
-
- case WriteExists:
- iFd = open(FileName.c_str(),O_RDWR);
- break;
- case WriteAny:
- iFd = open(FileName.c_str(),O_RDWR | O_CREAT,Perms);
- break;
+ 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());
- case WriteTemp:
+ 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
+
+ if ((Mode & Atomic) == Atomic)
+ {
+ Flags |= Replace;
+ char *name = strdup((FileName + ".XXXXXX").c_str());
+ TemporaryFileName = string(mktemp(name));
+ free(name);
+ }
+ else if ((Mode & (Exclusive | Create)) == (Exclusive | Create))
+ {
+ // for atomic, this will be done by rename in Close()
unlink(FileName.c_str());
- iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_EXCL,Perms);
- break;
- }
+ }
+ if ((Mode & Empty) == Empty)
+ {
+ struct stat Buf;
+ if (lstat(FileName.c_str(),&Buf) == 0 && S_ISLNK(Buf.st_mode))
+ unlink(FileName.c_str());
+ }
- if (iFd < 0)
+ if (TemporaryFileName.empty() == false)
+ iFd = open(TemporaryFileName.c_str(), fileflags, Perms);
+ else
+ iFd = open(FileName.c_str(), fileflags, Perms);
+
+ if (iFd != -1 && Compress == Gzip)
+ {
+ gz = gzdopen (iFd, "r");
+ if (gz == NULL)
+ {
+ close (iFd);
+ iFd = -1;
+ }
+ }
+
+ 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)
+{
+ Close();
+ Flags = (AutoClose) ? FileFd::AutoClose : 0;
+ iFd = Fd;
+ if (Mode == ReadOnlyGzip) {
+ gz = gzdopen (iFd, "r");
+ if (gz == NULL) {
+ if (AutoClose)
+ close (iFd);
+ return _error->Errno("gzdopen",_("Could not open file descriptor %d"),
+ Fd);
+ }
+ }
+ this->FileName = "";
+ return true;
+}
+ /*}}}*/
// FileFd::~File - Closes the file /*{{{*/
// ---------------------------------------------------------------------
/* If the proper modes are selected then we close the Fd and possibly
// ---------------------------------------------------------------------
/* We are carefull to handle interruption by a signal while reading
gracefully. */
-bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual)
+bool FileFd::Read(void *To,unsigned long long Size,unsigned long long *Actual)
{
int Res;
errno = 0;
do
{
- Res = read(iFd,To,Size);
+ if (gz != NULL)
+ Res = gzread(gz,To,Size);
+ else
+ Res = read(iFd,To,Size);
if (Res < 0 && errno == EINTR)
continue;
if (Res < 0)
}
Flags |= Fail;
- return _error->Error(_("read, still have %lu to read but none left"),Size);
+ return _error->Error(_("read, still have %llu to read but none left"), Size);
}
/*}}}*/
// FileFd::Write - Write to the file /*{{{*/
// ---------------------------------------------------------------------
/* */
-bool FileFd::Write(const void *From,unsigned long Size)
+bool FileFd::Write(const void *From,unsigned long long Size)
{
int Res;
errno = 0;
do
{
- Res = write(iFd,From,Size);
+ if (gz != NULL)
+ Res = gzwrite(gz,From,Size);
+ else
+ Res = write(iFd,From,Size);
if (Res < 0 && errno == EINTR)
continue;
if (Res < 0)
return true;
Flags |= Fail;
- return _error->Error(_("write, still have %lu to write but couldn't"),Size);
+ return _error->Error(_("write, still have %llu to write but couldn't"), Size);
}
/*}}}*/
// FileFd::Seek - Seek in the file /*{{{*/
// ---------------------------------------------------------------------
/* */
-bool FileFd::Seek(unsigned long To)
+bool FileFd::Seek(unsigned long long To)
{
- if (lseek(iFd,To,SEEK_SET) != (signed)To)
+ int res;
+ if (gz)
+ res = gzseek(gz,To,SEEK_SET);
+ else
+ res = lseek(iFd,To,SEEK_SET);
+ if (res != (signed)To)
{
Flags |= Fail;
- return _error->Error("Unable to seek to %lu",To);
+ return _error->Error("Unable to seek to %llu", To);
}
return true;
// FileFd::Skip - Seek in the file /*{{{*/
// ---------------------------------------------------------------------
/* */
-bool FileFd::Skip(unsigned long Over)
+bool FileFd::Skip(unsigned long long Over)
{
- if (lseek(iFd,Over,SEEK_CUR) < 0)
+ int res;
+ if (gz)
+ res = gzseek(gz,Over,SEEK_CUR);
+ else
+ res = lseek(iFd,Over,SEEK_CUR);
+ if (res < 0)
{
Flags |= Fail;
- return _error->Error("Unable to seek ahead %lu",Over);
+ return _error->Error("Unable to seek ahead %llu",Over);
}
return true;
// FileFd::Truncate - Truncate the file /*{{{*/
// ---------------------------------------------------------------------
/* */
-bool FileFd::Truncate(unsigned long To)
+bool FileFd::Truncate(unsigned long long To)
{
+ if (gz)
+ {
+ Flags |= Fail;
+ return _error->Error("Truncating gzipped files is not implemented (%s)", FileName.c_str());
+ }
if (ftruncate(iFd,To) != 0)
{
Flags |= Fail;
- return _error->Error("Unable to truncate to %lu",To);
+ return _error->Error("Unable to truncate to %llu",To);
}
return true;
// FileFd::Tell - Current seek position /*{{{*/
// ---------------------------------------------------------------------
/* */
-unsigned long FileFd::Tell()
+unsigned long long FileFd::Tell()
{
- off_t Res = lseek(iFd,0,SEEK_CUR);
+ off_t Res;
+ if (gz)
+ Res = gztell(gz);
+ else
+ Res = lseek(iFd,0,SEEK_CUR);
if (Res == (off_t)-1)
_error->Errno("lseek","Failed to determine the current file position");
return Res;
}
/*}}}*/
-// FileFd::Size - Return the size of the file /*{{{*/
+// FileFd::FileSize - Return the size of the file /*{{{*/
// ---------------------------------------------------------------------
/* */
-unsigned long FileFd::Size()
+unsigned long long FileFd::FileSize()
{
struct stat Buf;
+
if (fstat(iFd,&Buf) != 0)
return _error->Errno("fstat","Unable to determine the file size");
return Buf.st_size;
}
/*}}}*/
+// FileFd::Size - Return the size of the content in the file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+unsigned long long FileFd::Size()
+{
+ unsigned long long size = FileSize();
+
+ // only check gzsize if we are actually a gzip file, just checking for
+ // "gz" is not sufficient as uncompressed files will be opened with
+ // gzopen in "direct" mode as well
+ if (gz && !gzdirect(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;
+ if (read(iFd, &size, 4) != 4)
+ return _error->Errno("read","Unable to read original size of gzipped file");
+
+#ifdef WORDS_BIGENDIAN
+ uint32_t tmp_size = size;
+ uint8_t const * const p = (uint8_t const * const) &tmp_size;
+ tmp_size = (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0];
+ size = tmp_size;
+#endif
+
+ if (lseek(iFd, orig_pos, SEEK_SET) < 0)
+ return _error->Errno("lseek","Unable to seek in gzipped file");
+ return size;
+ }
+
+ return size;
+}
+ /*}}}*/
// FileFd::Close - Close the file if the close flag is set /*{{{*/
// ---------------------------------------------------------------------
/* */
{
bool Res = true;
if ((Flags & AutoClose) == AutoClose)
- if (iFd >= 0 && close(iFd) != 0)
- Res &= _error->Errno("close",_("Problem closing the file"));
+ {
+ if (gz != NULL) {
+ int const e = gzclose(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
+ if (iFd > 0 && close(iFd) != 0)
+ Res &= _error->Errno("close",_("Problem closing the file %s"), FileName.c_str());
+ }
+
+ if ((Flags & Replace) == Replace && iFd >= 0) {
+ 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());
+
+ FileName = TemporaryFileName; // for the unlink() below.
+ TemporaryFileName.clear();
+ }
+
iFd = -1;
-
+ gz = NULL;
+
if ((Flags & Fail) == Fail && (Flags & DelOnFail) == DelOnFail &&
FileName.empty() == false)
if (unlink(FileName.c_str()) != 0)
- Res &= _error->WarningE("unlnk",_("Problem unlinking the file"));
+ Res &= _error->WarningE("unlnk",_("Problem unlinking the file %s"), FileName.c_str());
+
+
return Res;
}
/*}}}*/
projects / apt.git / blobdiff