// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: fileutl.cc,v 1.33 1999/12/10 23:40:29 jgg Exp $
+// $Id: fileutl.cc,v 1.42 2002/09/14 05:29:22 jgg Exp $
/* ######################################################################
File Utilities
CopyFile - Buffered copy of a single file
GetLock - dpkg compatible lock file manipulation (fcntl)
- This source is placed in the Public Domain, do with it what you will
- It was originally written by Jason Gunthorpe.
+ 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 /*{{{*/
-#ifdef __GNUG__
-#pragma implementation "apt-pkg/fileutl.h"
-#endif
#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 <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/wait.h>
+#include <dirent.h>
#include <signal.h>
#include <errno.h>
+#include <set>
+#include <algorithm>
+
+#include <config.h>
+#ifdef WORDS_BIGENDIAN
+#include <inttypes.h>
+#endif
+ /*}}}*/
+
+using namespace std;
+
+// RunScripts - Run a set of scripts from a configuration subtree /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool RunScripts(const char *Cnf)
+{
+ Configuration::Item const *Opts = _config->Tree(Cnf);
+ if (Opts == 0 || Opts->Child == 0)
+ return true;
+ Opts = Opts->Child;
+
+ // Fork for running the system calls
+ pid_t Child = ExecFork();
+
+ // 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);
+
+ unsigned int Count = 1;
+ for (; Opts != 0; Opts = Opts->Next, Count++)
+ {
+ if (Opts->Value.empty() == true)
+ continue;
+
+ if (system(Opts->Value.c_str()) != 0)
+ _exit(100+Count);
+ }
+ _exit(0);
+ }
+
+ // Wait for the child
+ int Status = 0;
+ while (waitpid(Child,&Status,0) != Child)
+ {
+ if (errno == EINTR)
+ continue;
+ return _error->Errno("waitpid","Couldn't wait for subprocess");
+ }
+
+ // Restore sig int/quit
+ signal(SIGQUIT,SIG_DFL);
+ signal(SIGINT,SIG_DFL);
+
+ // Check for an error code.
+ if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
+ {
+ unsigned int Count = WEXITSTATUS(Status);
+ if (Count > 100)
+ {
+ Count -= 100;
+ for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--);
+ _error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str());
+ }
+
+ return _error->Error("Sub-process returned an error code");
+ }
+
+ return true;
+}
/*}}}*/
// CopyFile - Buffered copy of a file /*{{{*/
return false;
// Buffered copy between fds
- unsigned char *Buf = new unsigned char[64000];
+ SPtrArray<unsigned char> Buf = new unsigned char[64000];
unsigned long Size = From.Size();
while (Size != 0)
{
if (From.Read(Buf,ToRead) == false ||
To.Write(Buf,ToRead) == false)
- {
- delete [] Buf;
return false;
- }
Size -= ToRead;
}
- delete [] Buf;
return true;
}
/*}}}*/
close at some time. */
int GetLock(string File,bool Errors)
{
- int FD = open(File.c_str(),O_RDWR | O_CREAT | O_TRUNC,0640);
+ // GetLock() is used in aptitude on directories with public-write access
+ // Use O_NOFOLLOW here to prevent symlink traversal attacks
+ int FD = open(File.c_str(),O_RDWR | O_CREAT | O_NOFOLLOW,0640);
if (FD < 0)
{
+ // Read only .. cant have locking problems there.
+ if (errno == EROFS)
+ {
+ _error->Warning(_("Not using locking for read only lock file %s"),File.c_str());
+ return dup(0); // Need something for the caller to close
+ }
+
if (Errors == true)
- _error->Errno("open","Could not open lock file %s",File.c_str());
+ _error->Errno("open",_("Could not open lock file %s"),File.c_str());
+
+ // Feh.. We do this to distinguish the lock vs open case..
+ errno = EPERM;
return -1;
}
-
+ SetCloseExec(FD,true);
+
// Aquire a write lock
struct flock fl;
fl.l_type = F_WRLCK;
{
if (errno == ENOLCK)
{
- _error->Warning("Not using locking for nfs mounted lock file %s",File.c_str());
- return true;
+ _error->Warning(_("Not using locking for nfs mounted lock file %s"),File.c_str());
+ return dup(0); // Need something for the caller to close
}
if (Errors == true)
- _error->Errno("open","Could not get lock %s",File.c_str());
+ _error->Errno("open",_("Could not get lock %s"),File.c_str());
+
+ int Tmp = errno;
close(FD);
+ errno = Tmp;
return -1;
}
/*}}}*/
// 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
+ in the returned vector, otherwise every "normal" file is included. */
+std::vector<string> GetListOfFilesInDir(string const &Dir, string const &Ext,
+ bool const &SortList, bool const &AllowNoExt)
+{
+ std::vector<string> ext;
+ ext.reserve(2);
+ if (Ext.empty() == false)
+ ext.push_back(Ext);
+ if (AllowNoExt == true && ext.empty() == false)
+ ext.push_back("");
+ return GetListOfFilesInDir(Dir, ext, SortList);
+}
+std::vector<string> GetListOfFilesInDir(string const &Dir, std::vector<string> const &Ext,
+ bool const &SortList)
+{
+ // Attention debuggers: need to be set with the environment config file!
+ bool const Debug = _config->FindB("Debug::GetListOfFilesInDir", false);
+ if (Debug == true)
+ {
+ std::clog << "Accept in " << Dir << " only files with the following " << Ext.size() << " extensions:" << std::endl;
+ if (Ext.empty() == true)
+ std::clog << "\tNO extension" << std::endl;
+ else
+ for (std::vector<string>::const_iterator e = Ext.begin();
+ e != Ext.end(); ++e)
+ std::clog << '\t' << (e->empty() == true ? "NO" : *e) << " extension" << std::endl;
+ }
+
+ 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)
+ {
+ _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
+ return List;
+ }
+
+ for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D))
+ {
+ // skip "hidden" files
+ 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 (Ext.empty() == false)
+ {
+ string d_ext = flExtension(Ent->d_name);
+ if (d_ext == Ent->d_name) // no extension
+ {
+ if (std::find(Ext.begin(), Ext.end(), "") == Ext.end())
+ {
+ 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;
+ }
+ }
+ else if (std::find(Ext.begin(), Ext.end(), d_ext) == Ext.end())
+ {
+ 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;
+ }
+ }
+
+ // Skip bad filenames ala run-parts
+ const char *C = Ent->d_name;
+ for (; *C != 0; ++C)
+ if (isalpha(*C) == 0 && isdigit(*C) == 0
+ && *C != '_' && *C != '-') {
+ // no required extension -> dot is a bad character
+ if (*C == '.' && Ext.empty() == false)
+ continue;
+ break;
+ }
+
+ // we don't reach the end of the name -> bad character included
+ if (*C != 0)
+ {
+ if (Debug == true)
+ std::clog << "Bad file: " << Ent->d_name << " → bad character »"
+ << *C << "« in filename (period allowed: " << (Ext.empty() ? "no" : "yes") << ")" << std::endl;
+ continue;
+ }
+
+ // skip filenames which end with a period. These are never valid
+ if (*(C - 1) == '.')
+ {
+ if (Debug == true)
+ std::clog << "Bad file: " << Ent->d_name << " → Period as last character" << std::endl;
+ continue;
+ }
+
+ if (Debug == true)
+ std::clog << "Accept file: " << Ent->d_name << " in " << Dir << std::endl;
+ List.push_back(File);
+ }
+ closedir(D);
+
+ if (SortList == true)
+ std::sort(List.begin(),List.end());
+ return List;
+}
+ /*}}}*/
// SafeGetCWD - This is a safer getcwd that returns a dynamic string /*{{{*/
// ---------------------------------------------------------------------
/* We return / on failure. */
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 /*{{{*/
// ---------------------------------------------------------------------
/* */
/*}}}*/
// flNotFile - Strip the file from the directory name /*{{{*/
// ---------------------------------------------------------------------
-/* */
+/* Result ends in a / */
string flNotFile(string File)
{
string::size_type Res = File.rfind('/');
if (Res == string::npos)
- return File;
+ return "./";
Res++;
return string(File,0,Res);
}
/*}}}*/
+// flExtension - Return the extension for the file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+string flExtension(string File)
+{
+ string::size_type Res = File.rfind('.');
+ if (Res == string::npos)
+ return File;
+ Res++;
+ return string(File,Res,Res - File.length());
+}
+ /*}}}*/
// flNoLink - If file is a symlink then deref it /*{{{*/
// ---------------------------------------------------------------------
/* If the name is not a link then the returned path is the input. */
}
}
/*}}}*/
+// flCombine - Combine a file and a directory /*{{{*/
+// ---------------------------------------------------------------------
+/* If the file is an absolute path then it is just returned, otherwise
+ the directory is pre-pended to it. */
+string flCombine(string Dir,string File)
+{
+ if (File.empty() == true)
+ return string();
+
+ if (File[0] == '/' || Dir.empty() == true)
+ return File;
+ if (File.length() >= 2 && File[0] == '.' && File[1] == '/')
+ return File;
+ if (Dir[Dir.length()-1] == '/')
+ return Dir + File;
+ return Dir + '/' + File;
+}
+ /*}}}*/
// SetCloseExec - Set the close on exec flag /*{{{*/
// ---------------------------------------------------------------------
/* */
/*}}}*/
// WaitFd - Wait for a FD to become readable /*{{{*/
// ---------------------------------------------------------------------
-/* This waits for a FD to become readable using select. It is usefull for
+/* This waits for a FD to become readable using select. It is useful for
applications making use of non-blocking sockets. The timeout is
in seconds. */
bool WaitFd(int Fd,bool write,unsigned long timeout)
/* This is used if you want to cleanse the environment for the forked
child, it fixes up the important signals and nukes all of the fds,
otherwise acts like normal fork. */
-int ExecFork()
+pid_t ExecFork()
{
// Fork off the process
pid_t Process = fork();
signal(SIGWINCH,SIG_DFL);
signal(SIGCONT,SIG_DFL);
signal(SIGTSTP,SIG_DFL);
-
+
+ set<int> KeepFDs;
+ Configuration::Item const *Opts = _config->Tree("APT::Keep-Fds");
+ if (Opts != 0 && Opts->Child != 0)
+ {
+ Opts = Opts->Child;
+ for (; Opts != 0; Opts = Opts->Next)
+ {
+ if (Opts->Value.empty() == true)
+ continue;
+ int fd = atoi(Opts->Value.c_str());
+ KeepFDs.insert(fd);
+ }
+ }
+
// Close all of our FDs - just in case
for (int K = 3; K != 40; K++)
- fcntl(K,F_SETFD,FD_CLOEXEC);
+ {
+ if(KeepFDs.find(K) == KeepFDs.end())
+ fcntl(K,F_SETFD,FD_CLOEXEC);
+ }
}
return Process;
/*}}}*/
// ExecWait - Fancy waitpid /*{{{*/
// ---------------------------------------------------------------------
-/* Waits for the given sub process. If Reap is set the no errors are
+/* Waits for the given sub process. If Reap is set then no errors are
generated. Otherwise a failed subprocess will generate a proper descriptive
message */
-bool ExecWait(int Pid,const char *Name,bool Reap)
+bool ExecWait(pid_t Pid,const char *Name,bool Reap)
{
if (Pid <= 1)
return true;
if (Reap == true)
return false;
- return _error->Error("Waited, for %s but it wasn't there",Name);
+ return _error->Error(_("Waited for %s but it wasn't there"),Name);
}
{
if (Reap == true)
return false;
- if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV)
- return _error->Error("Sub-process %s recieved a segmentation fault.",Name);
+ if (WIFSIGNALED(Status) != 0)
+ {
+ if( WTERMSIG(Status) == SIGSEGV)
+ return _error->Error(_("Sub-process %s received a segmentation fault."),Name);
+ else
+ return _error->Error(_("Sub-process %s received signal %u."),Name, WTERMSIG(Status));
+ }
if (WIFEXITED(Status) != 0)
- return _error->Error("Sub-process %s returned an error code (%u)",Name,WEXITSTATUS(Status));
+ return _error->Error(_("Sub-process %s returned an error code (%u)"),Name,WEXITSTATUS(Status));
- return _error->Error("Sub-process %s exited unexpectedly",Name);
+ return _error->Error(_("Sub-process %s exited unexpectedly"),Name);
}
return true;
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;
- if (stat(FileName.c_str(),&Buf) == 0 && S_ISLNK(Buf.st_mode))
+ 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 WriteAny:
iFd = open(FileName.c_str(),O_RDWR | O_CREAT,Perms);
break;
+
+ case WriteTemp:
+ unlink(FileName.c_str());
+ iFd = open(FileName.c_str(),O_RDWR | O_CREAT | O_EXCL,Perms);
+ break;
}
if (iFd < 0)
- return _error->Errno("open","Could not open file %s",FileName.c_str());
+ return _error->Errno("open",_("Could not open file %s"),FileName.c_str());
this->FileName = FileName;
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 /*{{{*/
// ---------------------------------------------------------------------
// ---------------------------------------------------------------------
/* We are carefull to handle interruption by a signal while reading
gracefully. */
-bool FileFd::Read(void *To,unsigned long Size,bool AllowEof)
+bool FileFd::Read(void *To,unsigned long Size,unsigned long *Actual)
{
int Res;
errno = 0;
+ if (Actual != 0)
+ *Actual = 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->Errno("read","Read error");
+ return _error->Errno("read",_("Read error"));
}
To = (char *)To + Res;
Size -= Res;
+ if (Actual != 0)
+ *Actual += Res;
}
while (Res > 0 && Size > 0);
return true;
// Eof handling
- if (AllowEof == true)
+ if (Actual != 0)
{
Flags |= HitEof;
return true;
}
Flags |= Fail;
- return _error->Error("read, still have %u to read but none left",Size);
+ return _error->Error(_("read, still have %lu to read but none left"),Size);
}
/*}}}*/
// FileFd::Write - Write to the file /*{{{*/
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)
{
Flags |= Fail;
- return _error->Errno("write","Write error");
+ return _error->Errno("write",_("Write error"));
}
From = (char *)From + Res;
return true;
Flags |= Fail;
- return _error->Error("write, still have %u to write but couldn't",Size);
+ return _error->Error(_("write, still have %lu to write but couldn't"),Size);
}
/*}}}*/
// FileFd::Seek - Seek in the file /*{{{*/
/* */
bool FileFd::Seek(unsigned 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 %u",To);
+ return _error->Error("Unable to seek to %lu",To);
}
return true;
/* */
bool FileFd::Skip(unsigned 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 %u",Over);
+ return _error->Error("Unable to seek ahead %lu",Over);
}
return true;
/* */
bool FileFd::Truncate(unsigned 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 %u",To);
+ return _error->Error("Unable to truncate to %lu",To);
}
return true;
/* */
unsigned 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 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 FileFd::Size()
+{
+ unsigned 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 */
+ 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.
+ }
+
iFd = -1;
-
+ gz = NULL;
+
if ((Flags & Fail) == Fail && (Flags & DelOnFail) == DelOnFail &&
FileName.empty() == false)
if (unlink(FileName.c_str()) != 0)
- Res &= _error->Warning("unlnk","Problem unlinking the file");
+ Res &= _error->WarningE("unlnk",_("Problem unlinking the file %s"), FileName.c_str());
+
+
return Res;
}
/*}}}*/
+// FileFd::Sync - Sync the file /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool FileFd::Sync()
+{
+#ifdef _POSIX_SYNCHRONIZED_IO
+ if (fsync(iFd) != 0)
+ return _error->Errno("sync",_("Problem syncing the file"));
+#endif
+ return true;
+}
+ /*}}}*/
projects / apt.git / blobdiff