X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/6dd8400ca787ef832d87121f304f98ad152dc3a6..650faab01603caac04494d54cf6b10a65c00ea13:/apt-pkg/contrib/fileutl.cc diff --git a/apt-pkg/contrib/fileutl.cc b/apt-pkg/contrib/fileutl.cc index 16f7ce929..2e62846d9 100644 --- a/apt-pkg/contrib/fileutl.cc +++ b/apt-pkg/contrib/fileutl.cc @@ -11,22 +11,24 @@ Most of this source is placed in the Public Domain, do with it what you will It was originally written by Jason Gunthorpe . + FileFd gzip support added by Martin Pitt The exception is RunScripts() it is under the GPLv2 ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ +#include + #include #include #include #include #include -#include - #include #include +#include #include #include @@ -40,6 +42,12 @@ #include #include #include + +#ifdef WORDS_BIGENDIAN +#include +#endif + +#include /*}}}*/ using namespace std; @@ -60,6 +68,15 @@ bool RunScripts(const char *Cnf) // 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); @@ -116,10 +133,10 @@ bool CopyFile(FileFd &From,FileFd &To) // Buffered copy between fds SPtrArray 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; @@ -189,7 +206,7 @@ int GetLock(string File,bool Errors) /*}}}*/ // FileExists - Check if a file exists /*{{{*/ // --------------------------------------------------------------------- -/* */ +/* Beware: Directories are also files! */ bool FileExists(string File) { struct stat Buf; @@ -198,6 +215,17 @@ bool FileExists(string File) 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 /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -249,6 +277,27 @@ bool CreateDirectory(string const &Parent, string const &Path) 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 @@ -281,6 +330,14 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c } std::vector 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) { @@ -294,6 +351,20 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c 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 @@ -306,6 +377,8 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c { 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; } } @@ -313,6 +386,8 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c { 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; } } @@ -345,16 +420,6 @@ std::vector GetListOfFilesInDir(string const &Dir, std::vector c 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); @@ -651,10 +716,31 @@ bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms) case ReadOnly: iFd = open(FileName.c_str(),O_RDONLY); break; + + case ReadOnlyGzip: + iFd = open(FileName.c_str(),O_RDONLY); + if (iFd > 0) { + gz = gzdopen (iFd, "r"); + if (gz == NULL) { + close (iFd); + iFd = -1; + } + } + break; + case WriteAtomic: + { + Flags |= Replace; + char *name = strdup((FileName + ".XXXXXX").c_str()); + TemporaryFileName = string(mktemp(name)); + iFd = open(TemporaryFileName.c_str(),O_RDWR | O_CREAT | O_EXCL,Perms); + free(name); + break; + } + case WriteEmpty: { - struct stat Buf; + 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); @@ -682,6 +768,24 @@ bool FileFd::Open(string FileName,OpenMode Mode, unsigned long Perms) SetCloseExec(iFd,true); return true; } + +bool FileFd::OpenDescriptor(int Fd, OpenMode Mode, 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 /*{{{*/ // --------------------------------------------------------------------- @@ -696,7 +800,7 @@ FileFd::~FileFd() // --------------------------------------------------------------------- /* 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; @@ -705,7 +809,10 @@ bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual) 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) @@ -732,19 +839,22 @@ bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual) } 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) @@ -762,18 +872,23 @@ bool FileFd::Write(const void *From,unsigned long Size) 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; @@ -782,12 +897,17 @@ bool FileFd::Seek(unsigned long To) // 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; @@ -796,12 +916,17 @@ bool FileFd::Skip(unsigned long Over) // 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; @@ -810,25 +935,68 @@ bool FileFd::Truncate(unsigned long To) // 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 /*{{{*/ // --------------------------------------------------------------------- /* */ @@ -836,14 +1004,33 @@ bool FileFd::Close() { 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. + } + 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; } /*}}}*/