X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/3aa695e3e07925d89bae59e0890f1f3b55b9e15a..4652a9eee39df1cefa49ab177c0cfc50b9aad567:/methods/rred.cc diff --git a/methods/rred.cc b/methods/rred.cc index 262c78cab..7c65f8f92 100644 --- a/methods/rred.cc +++ b/methods/rred.cc @@ -1,10 +1,13 @@ // Includes /*{{{*/ +#include + #include #include #include #include #include #include +#include #include #include @@ -33,10 +36,10 @@ class RredMethod : public pkgAcqMethod { // return values enum State {ED_OK, ED_ORDERING, ED_PARSER, ED_FAILURE, MMAP_FAILED}; - State applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_file, + State applyFile(FileFd &ed_cmds, FileFd &in_file, FileFd &out_file, unsigned long &line, char *buffer, Hashes *hash) const; - void ignoreLineInFile(FILE *fin, char *buffer) const; - void copyLinesFromFileToFile(FILE *fin, FILE *fout, unsigned int lines, + void ignoreLineInFile(FileFd &fin, char *buffer) const; + void copyLinesFromFileToFile(FileFd &fin, FileFd &fout, unsigned int lines, Hashes *hash, char *buffer) const; State patchFile(FileFd &Patch, FileFd &From, FileFd &out_file, Hashes *hash) const; @@ -47,7 +50,7 @@ protected: virtual bool Fetch(FetchItem *Itm); public: - RredMethod() : pkgAcqMethod("1.1",SingleInstance | SendConfig) {}; + RredMethod() : pkgAcqMethod("1.1",SingleInstance | SendConfig), Debug(false) {}; }; /*}}}*/ /** \brief applyFile - in reverse order with a tail recursion {{{ @@ -65,10 +68,10 @@ public: * \param hash the created file for correctness * \return the success State of the ed command executor */ -RredMethod::State RredMethod::applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_file, +RredMethod::State RredMethod::applyFile(FileFd &ed_cmds, FileFd &in_file, FileFd &out_file, unsigned long &line, char *buffer, Hashes *hash) const { // get the current command and parse it - if (fgets(buffer, BUF_SIZE, ed_cmds) == NULL) { + if (ed_cmds.ReadLine(buffer, BUF_SIZE) == NULL) { if (Debug == true) std::clog << "rred: encounter end of file - we can start patching now." << std::endl; line = 0; @@ -123,7 +126,7 @@ RredMethod::State RredMethod::applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_ unsigned char mode = *idx; // save the current position - unsigned const long pos = ftell(ed_cmds); + unsigned const long long pos = ed_cmds.Tell(); // if this is add or change then go to the next full stop unsigned int data_length = 0; @@ -157,7 +160,7 @@ RredMethod::State RredMethod::applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_ // include data from ed script if (mode == MODE_CHANGED || mode == MODE_ADDED) { - fseek(ed_cmds, pos, SEEK_SET); + ed_cmds.Seek(pos); copyLinesFromFileToFile(ed_cmds, out_file, data_length, hash, buffer); } @@ -171,23 +174,24 @@ RredMethod::State RredMethod::applyFile(FILE *ed_cmds, FILE *in_file, FILE *out_ return ED_OK; } /*}}}*/ -void RredMethod::copyLinesFromFileToFile(FILE *fin, FILE *fout, unsigned int lines,/*{{{*/ +void RredMethod::copyLinesFromFileToFile(FileFd &fin, FileFd &fout, unsigned int lines,/*{{{*/ Hashes *hash, char *buffer) const { while (0 < lines--) { do { - fgets(buffer, BUF_SIZE, fin); - size_t const written = fwrite(buffer, 1, strlen(buffer), fout); - hash->Add((unsigned char*)buffer, written); + fin.ReadLine(buffer, BUF_SIZE); + unsigned long long const towrite = strlen(buffer); + fout.Write(buffer, towrite); + hash->Add((unsigned char*)buffer, towrite); } while (strlen(buffer) == (BUF_SIZE - 1) && buffer[BUF_SIZE - 2] != '\n'); } } /*}}}*/ -void RredMethod::ignoreLineInFile(FILE *fin, char *buffer) const { /*{{{*/ - fgets(buffer, BUF_SIZE, fin); +void RredMethod::ignoreLineInFile(FileFd &fin, char *buffer) const { /*{{{*/ + fin.ReadLine(buffer, BUF_SIZE); while (strlen(buffer) == (BUF_SIZE - 1) && buffer[BUF_SIZE - 2] != '\n') { - fgets(buffer, BUF_SIZE, fin); + fin.ReadLine(buffer, BUF_SIZE); buffer[0] = ' '; } } @@ -195,26 +199,25 @@ void RredMethod::ignoreLineInFile(FILE *fin, char *buffer) const { /*{{{*/ RredMethod::State RredMethod::patchFile(FileFd &Patch, FileFd &From, /*{{{*/ FileFd &out_file, Hashes *hash) const { char buffer[BUF_SIZE]; - FILE* fFrom = fdopen(From.Fd(), "r"); - FILE* fPatch = fdopen(Patch.Fd(), "r"); - FILE* fTo = fdopen(out_file.Fd(), "w"); /* we do a tail recursion to read the commands in the right order */ unsigned long line = -1; // assign highest possible value - State const result = applyFile(fPatch, fFrom, fTo, line, buffer, hash); + State const result = applyFile(Patch, From, out_file, line, buffer, hash); /* read the rest from infile */ if (result == ED_OK) { - while (fgets(buffer, BUF_SIZE, fFrom) != NULL) { - size_t const written = fwrite(buffer, 1, strlen(buffer), fTo); - hash->Add((unsigned char*)buffer, written); + while (From.ReadLine(buffer, BUF_SIZE) != NULL) { + unsigned long long const towrite = strlen(buffer); + out_file.Write(buffer, towrite); + hash->Add((unsigned char*)buffer, towrite); } - fflush(fTo); } return result; } /*}}}*/ -struct EdCommand { /*{{{*/ +/* struct EdCommand {{{*/ +#ifdef _POSIX_MAPPED_FILES +struct EdCommand { size_t data_start; size_t data_end; size_t data_lines; @@ -223,6 +226,22 @@ struct EdCommand { /*{{{*/ char type; }; #define IOV_COUNT 1024 /* Don't really want IOV_MAX since it can be arbitrarily large */ +static ssize_t retry_writev(int fd, const struct iovec *iov, int iovcnt) { + ssize_t Res; + errno = 0; + ssize_t i = 0; + do { + Res = writev(fd, iov + i, iovcnt); + if (Res < 0 && errno == EINTR) + continue; + if (Res < 0) + return _error->Errno("writev",_("Write error")); + iovcnt -= Res; + i += Res; + } while (Res > 0 && iovcnt > 0); + return i; +} +#endif /*}}}*/ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From, /*{{{*/ FileFd &out_file, Hashes *hash) const { @@ -230,7 +249,9 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From, /*{{{*/ MMap ed_cmds(Patch, MMap::ReadOnly); MMap in_file(From, MMap::ReadOnly); - if (ed_cmds.Size() == 0 || in_file.Size() == 0) + unsigned long long const ed_size = ed_cmds.Size(); + unsigned long long const in_size = in_file.Size(); + if (ed_size == 0 || in_size == 0) return MMAP_FAILED; EdCommand* commands = 0; @@ -239,10 +260,10 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From, /*{{{*/ const char* begin = (char*) ed_cmds.Data(); const char* end = begin; - const char* ed_end = (char*) ed_cmds.Data() + ed_cmds.Size(); + const char* ed_end = (char*) ed_cmds.Data() + ed_size; const char* input = (char*) in_file.Data(); - const char* input_end = (char*) in_file.Data() + in_file.Size(); + const char* input_end = (char*) in_file.Data() + in_size; size_t i; @@ -326,7 +347,12 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From, /*{{{*/ } if(command_count == command_alloc) { command_alloc = (command_alloc + 64) * 3 / 2; - commands = (EdCommand*) realloc(commands, command_alloc * sizeof(EdCommand)); + EdCommand* newCommands = (EdCommand*) realloc(commands, command_alloc * sizeof(EdCommand)); + if (newCommands == NULL) { + free(commands); + return MMAP_FAILED; + } + commands = newCommands; } commands[command_count++] = cmd; } @@ -365,7 +391,7 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From, /*{{{*/ hash->Add((const unsigned char*) begin, input - begin); if(++iov_size == IOV_COUNT) { - writev(out_file.Fd(), iov, IOV_COUNT); + retry_writev(out_file.Fd(), iov, IOV_COUNT); iov_size = 0; } } @@ -390,7 +416,7 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From, /*{{{*/ iov[iov_size].iov_len); if(++iov_size == IOV_COUNT) { - writev(out_file.Fd(), iov, IOV_COUNT); + retry_writev(out_file.Fd(), iov, IOV_COUNT); iov_size = 0; } } @@ -405,15 +431,15 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From, /*{{{*/ } if(iov_size) { - writev(out_file.Fd(), iov, iov_size); + retry_writev(out_file.Fd(), iov, iov_size); iov_size = 0; } for(i = 0; i < iov_size; i += IOV_COUNT) { if(iov_size - i < IOV_COUNT) - writev(out_file.Fd(), iov + i, iov_size - i); + retry_writev(out_file.Fd(), iov + i, iov_size - i); else - writev(out_file.Fd(), iov + i, IOV_COUNT); + retry_writev(out_file.Fd(), iov + i, IOV_COUNT); } delete [] iov; @@ -429,7 +455,7 @@ bool RredMethod::Fetch(FetchItem *Itm) /*{{{*/ { Debug = _config->FindB("Debug::pkgAcquire::RRed", false); URI Get = Itm->Uri; - string Path = Get.Host + Get.Path; // To account for relative paths + std::string Path = Get.Host + Get.Path; // To account for relative paths FetchResult Res; Res.Filename = Itm->DestFile; @@ -445,8 +471,8 @@ bool RredMethod::Fetch(FetchItem *Itm) /*{{{*/ // Open the source and destination files (the d'tor of FileFd will do // the cleanup/closing of the fds) FileFd From(Path,FileFd::ReadOnly); - FileFd Patch(Path+".ed",FileFd::ReadOnly); - FileFd To(Itm->DestFile,FileFd::WriteEmpty); + FileFd Patch(Path+".ed",FileFd::ReadOnly, FileFd::Gzip); + FileFd To(Itm->DestFile,FileFd::WriteAtomic); To.EraseOnFailure(); if (_error->PendingError() == true) return false; @@ -456,9 +482,9 @@ bool RredMethod::Fetch(FetchItem *Itm) /*{{{*/ State const result = patchMMap(Patch, From, To, &Hash); if (result == MMAP_FAILED) { // retry with patchFile - lseek(Patch.Fd(), 0, SEEK_SET); - lseek(From.Fd(), 0, SEEK_SET); - To.Open(Itm->DestFile,FileFd::WriteEmpty); + Patch.Seek(0); + From.Seek(0); + To.Open(Itm->DestFile,FileFd::WriteAtomic); if (_error->PendingError() == true) return false; if (patchFile(Patch, From, To, &Hash) != ED_OK) { @@ -477,23 +503,26 @@ bool RredMethod::Fetch(FetchItem *Itm) /*{{{*/ Patch.Close(); To.Close(); - // Transfer the modification times - struct stat Buf; - if (stat(Path.c_str(),&Buf) != 0) + /* Transfer the modification times from the patch file + to be able to see in which state the file should be + and use the access time from the "old" file */ + struct stat BufBase, BufPatch; + if (stat(Path.c_str(),&BufBase) != 0 || + stat(std::string(Path+".ed").c_str(),&BufPatch) != 0) return _error->Errno("stat",_("Failed to stat")); struct utimbuf TimeBuf; - TimeBuf.actime = Buf.st_atime; - TimeBuf.modtime = Buf.st_mtime; + TimeBuf.actime = BufBase.st_atime; + TimeBuf.modtime = BufPatch.st_mtime; if (utime(Itm->DestFile.c_str(),&TimeBuf) != 0) return _error->Errno("utime",_("Failed to set modification time")); - if (stat(Itm->DestFile.c_str(),&Buf) != 0) + if (stat(Itm->DestFile.c_str(),&BufBase) != 0) return _error->Errno("stat",_("Failed to stat")); // return done - Res.LastModified = Buf.st_mtime; - Res.Size = Buf.st_size; + Res.LastModified = BufBase.st_mtime; + Res.Size = BufBase.st_size; Res.TakeHashes(Hash); URIDone(Res);