X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/21248c0f00ee71412dbadc6ebf84011cf974346d..5832913a49d4f7c75527264a935cc0ce00627f1d:/methods/rred.cc diff --git a/methods/rred.cc b/methods/rred.cc index 554ac99b4..958933a07 100644 --- a/methods/rred.cc +++ b/methods/rred.cc @@ -7,12 +7,13 @@ #include +#include #include #include -#include #include #include #include +#include "aptmethod.h" #include #include @@ -21,6 +22,7 @@ #include #include +#include #include #include #include @@ -35,9 +37,9 @@ class MemBlock { char *start; size_t size; char *free; - struct MemBlock *next; + MemBlock *next; - MemBlock(size_t size) : size(size), next(NULL) + explicit MemBlock(size_t size) : size(size), next(NULL) { free = start = new char[size]; } @@ -116,7 +118,7 @@ struct Change { size_t add_len; /* bytes */ char *add; - Change(int off) + explicit Change(size_t off) { offset = off; del_cnt = add_cnt = add_len = 0; @@ -333,83 +335,93 @@ class Patch { FileChanges filechanges; MemBlock add_text; - static bool retry_fwrite(char *b, size_t l, FILE *f, Hashes *hash) + static bool retry_fwrite(char *b, size_t l, FileFd &f, Hashes * const start_hash, Hashes * const end_hash = nullptr) APT_NONNULL(1) { - size_t r = 1; - while (r > 0 && l > 0) - { - r = fwrite(b, 1, l, f); - if (hash) - hash->Add((unsigned char*)b, r); - l -= r; - b += r; - } - return l == 0; + if (f.Write(b, l) == false) + return false; + if (start_hash) + start_hash->Add((unsigned char*)b, l); + if (end_hash) + end_hash->Add((unsigned char*)b, l); + return true; } - static void dump_rest(FILE *o, FILE *i, Hashes *hash) + static void dump_rest(FileFd &o, FileFd &i, + Hashes * const start_hash, Hashes * const end_hash) { char buffer[BLOCK_SIZE]; - size_t l; - while (0 < (l = fread(buffer, 1, sizeof(buffer), i))) { - if (!retry_fwrite(buffer, l, o, hash)) + unsigned long long l = 0; + while (i.Read(buffer, sizeof(buffer), &l)) { + if (l ==0 || !retry_fwrite(buffer, l, o, start_hash, end_hash)) break; } } - static void dump_lines(FILE *o, FILE *i, size_t n, Hashes *hash) + static void dump_lines(FileFd &o, FileFd &i, size_t n, + Hashes * const start_hash, Hashes * const end_hash) { char buffer[BLOCK_SIZE]; while (n > 0) { - if (fgets(buffer, sizeof(buffer), i) == 0) + if (i.ReadLine(buffer, sizeof(buffer)) == NULL) buffer[0] = '\0'; size_t const l = strlen(buffer); if (l == 0 || buffer[l-1] == '\n') n--; - retry_fwrite(buffer, l, o, hash); + retry_fwrite(buffer, l, o, start_hash, end_hash); } } - static void skip_lines(FILE *i, int n) + static void skip_lines(FileFd &i, int n, Hashes * const start_hash) { char buffer[BLOCK_SIZE]; while (n > 0) { - if (fgets(buffer, sizeof(buffer), i) == 0) + if (i.ReadLine(buffer, sizeof(buffer)) == NULL) buffer[0] = '\0'; size_t const l = strlen(buffer); if (l == 0 || buffer[l-1] == '\n') n--; + if (start_hash) + start_hash->Add((unsigned char*)buffer, l); } } - static void dump_mem(FILE *o, char *p, size_t s, Hashes *hash) { - retry_fwrite(p, s, o, hash); + static void dump_mem(FileFd &o, char *p, size_t s, Hashes *hash) APT_NONNULL(2) { + retry_fwrite(p, s, o, nullptr, hash); } public: - void read_diff(FileFd &f) + bool read_diff(FileFd &f, Hashes * const h) { char buffer[BLOCK_SIZE]; bool cmdwanted = true; - Change ch(0); - while(f.ReadLine(buffer, sizeof(buffer))) - { + Change ch(std::numeric_limits::max()); + if (f.ReadLine(buffer, sizeof(buffer)) == NULL) + return _error->Error("Reading first line of patchfile %s failed", f.Name().c_str()); + do { + if (h != NULL) + h->Add(buffer); if (cmdwanted) { char *m, *c; size_t s, e; - s = strtol(buffer, &m, 10); - if (m == buffer) { - s = e = ch.offset + ch.add_cnt; - c = buffer; - } else if (*m == ',') { - m++; + errno = 0; + s = strtoul(buffer, &m, 10); + if (unlikely(m == buffer || s == std::numeric_limits::max() || errno != 0)) + return _error->Error("Parsing patchfile %s failed: Expected an effected line start", f.Name().c_str()); + else if (*m == ',') { + ++m; e = strtol(m, &c, 10); + if (unlikely(m == c || e == std::numeric_limits::max() || errno != 0)) + return _error->Error("Parsing patchfile %s failed: Expected an effected line end", f.Name().c_str()); + if (unlikely(e < s)) + return _error->Error("Parsing patchfile %s failed: Effected lines end %lu is before start %lu", f.Name().c_str(), e, s); } else { e = s; c = m; } + if (s > ch.offset) + return _error->Error("Parsing patchfile %s failed: Effected line is after previous effected line", f.Name().c_str()); switch(*c) { case 'a': cmdwanted = false; @@ -420,6 +432,8 @@ class Patch { ch.del_cnt = 0; break; case 'c': + if (unlikely(s == 0)) + return _error->Error("Parsing patchfile %s failed: Change command can't effect line zero", f.Name().c_str()); cmdwanted = false; ch.add = NULL; ch.add_cnt = 0; @@ -428,6 +442,8 @@ class Patch { ch.del_cnt = e - s + 1; break; case 'd': + if (unlikely(s == 0)) + return _error->Error("Parsing patchfile %s failed: Delete command can't effect line zero", f.Name().c_str()); ch.offset = s - 1; ch.del_cnt = e - s + 1; ch.add = NULL; @@ -435,9 +451,11 @@ class Patch { ch.add_len = 0; filechanges.add_change(ch); break; + default: + return _error->Error("Parsing patchfile %s failed: Unknown command", f.Name().c_str()); } } else { /* !cmdwanted */ - if (buffer[0] == '.' && buffer[1] == '\n') { + if (strcmp(buffer, ".\n") == 0) { cmdwanted = true; filechanges.add_change(ch); } else { @@ -463,10 +481,11 @@ class Patch { } } } - } + } while(f.ReadLine(buffer, sizeof(buffer))); + return true; } - void write_diff(FILE *f) + void write_diff(FileFd &f) { unsigned long long line = 0; std::list::reverse_iterator ch; @@ -477,51 +496,84 @@ class Patch { for (ch = filechanges.rbegin(); ch != filechanges.rend(); ++ch) { std::list::reverse_iterator mg_i, mg_e = ch; while (ch->del_cnt == 0 && ch->offset == 0) + { ++ch; + if (unlikely(ch == filechanges.rend())) + return; + } line -= ch->del_cnt; + std::string buf; if (ch->add_cnt > 0) { if (ch->del_cnt == 0) { - fprintf(f, "%llua\n", line); + strprintf(buf, "%llua\n", line); } else if (ch->del_cnt == 1) { - fprintf(f, "%lluc\n", line+1); + strprintf(buf, "%lluc\n", line+1); } else { - fprintf(f, "%llu,%lluc\n", line+1, line+ch->del_cnt); + strprintf(buf, "%llu,%lluc\n", line+1, line+ch->del_cnt); } + f.Write(buf.c_str(), buf.length()); mg_i = ch; do { dump_mem(f, mg_i->add, mg_i->add_len, NULL); } while (mg_i-- != mg_e); - fprintf(f, ".\n"); + buf = ".\n"; + f.Write(buf.c_str(), buf.length()); } else if (ch->del_cnt == 1) { - fprintf(f, "%llud\n", line+1); + strprintf(buf, "%llud\n", line+1); + f.Write(buf.c_str(), buf.length()); } else if (ch->del_cnt > 1) { - fprintf(f, "%llu,%llud\n", line+1, line+ch->del_cnt); + strprintf(buf, "%llu,%llud\n", line+1, line+ch->del_cnt); + f.Write(buf.c_str(), buf.length()); } line -= ch->offset; } } - void apply_against_file(FILE *out, FILE *in, Hashes *hash = NULL) + void apply_against_file(FileFd &out, FileFd &in, + Hashes * const start_hash = nullptr, Hashes * const end_hash = nullptr) { std::list::iterator ch; for (ch = filechanges.begin(); ch != filechanges.end(); ++ch) { - dump_lines(out, in, ch->offset, hash); - skip_lines(in, ch->del_cnt); - dump_mem(out, ch->add, ch->add_len, hash); + dump_lines(out, in, ch->offset, start_hash, end_hash); + skip_lines(in, ch->del_cnt, start_hash); + if (ch->add_len != 0) + dump_mem(out, ch->add, ch->add_len, end_hash); } - dump_rest(out, in, hash); + dump_rest(out, in, start_hash, end_hash); + out.Flush(); } }; -class RredMethod : public pkgAcqMethod { +class RredMethod : public aptMethod { private: bool Debug; + struct PDiffFile { + std::string FileName; + HashStringList ExpectedHashes; + PDiffFile(std::string const &FileName, HashStringList const &ExpectedHashes) : + FileName(FileName), ExpectedHashes(ExpectedHashes) {} + }; + + HashStringList ReadExpectedHashesForPatch(unsigned int const patch, std::string const &Message) + { + HashStringList ExpectedHashes; + for (char const * const * type = HashString::SupportedHashes(); *type != NULL; ++type) + { + std::string tagname; + strprintf(tagname, "Patch-%d-%s-Hash", patch, *type); + std::string const hashsum = LookupTag(Message, tagname.c_str()); + if (hashsum.empty() == false) + ExpectedHashes.push_back(HashString(*type, hashsum)); + } + return ExpectedHashes; + } + protected: - virtual bool Fetch(FetchItem *Itm) { - Debug = _config->FindB("Debug::pkgAcquire::RRed", false); + virtual bool URIAcquire(std::string const &Message, FetchItem *Itm) APT_OVERRIDE { + Debug = DebugEnabled(); URI Get = Itm->Uri; std::string Path = Get.Host + Get.Path; // rred:/path - no host @@ -534,11 +586,27 @@ class RredMethod : public pkgAcqMethod { } else URIStart(Res); - std::vector patchpaths; + std::vector patchfiles; Patch patch; + HashStringList StartHashes; + for (char const * const * type = HashString::SupportedHashes(); *type != nullptr; ++type) + { + std::string tagname; + strprintf(tagname, "Start-%s-Hash", *type); + std::string const hashsum = LookupTag(Message, tagname.c_str()); + if (hashsum.empty() == false) + StartHashes.push_back(HashString(*type, hashsum)); + } + if (FileExists(Path + ".ed") == true) - patchpaths.push_back(Path + ".ed"); + { + HashStringList const ExpectedHashes = ReadExpectedHashesForPatch(0, Message); + std::string const FileName = Path + ".ed"; + if (ExpectedHashes.usable() == false) + return _error->Error("No hashes found for uncompressed patch: %s", FileName.c_str()); + patchfiles.push_back(PDiffFile(FileName, ExpectedHashes)); + } else { _error->PushToStack(); @@ -546,31 +614,44 @@ class RredMethod : public pkgAcqMethod { _error->RevertToStack(); std::string const baseName = Path + ".ed."; + unsigned int seen_patches = 0; for (std::vector::const_iterator p = patches.begin(); p != patches.end(); ++p) + { if (p->compare(0, baseName.length(), baseName) == 0) - patchpaths.push_back(*p); + { + HashStringList const ExpectedHashes = ReadExpectedHashesForPatch(seen_patches, Message); + if (ExpectedHashes.usable() == false) + return _error->Error("No hashes found for uncompressed patch %d: %s", seen_patches, p->c_str()); + patchfiles.push_back(PDiffFile(*p, ExpectedHashes)); + ++seen_patches; + } + } } std::string patch_name; - for (std::vector::iterator I = patchpaths.begin(); - I != patchpaths.end(); + for (std::vector::iterator I = patchfiles.begin(); + I != patchfiles.end(); ++I) { - patch_name = *I; + patch_name = I->FileName; if (Debug == true) std::clog << "Patching " << Path << " with " << patch_name << std::endl; FileFd p; + Hashes patch_hash(I->ExpectedHashes); // all patches are compressed, even if the name doesn't reflect it - if (p.Open(patch_name, FileFd::ReadOnly, FileFd::Gzip) == false) { - std::cerr << "Could not open patch file " << patch_name << std::endl; - _error->DumpErrors(std::cerr); - abort(); + if (p.Open(patch_name, FileFd::ReadOnly, FileFd::Gzip) == false || + patch.read_diff(p, &patch_hash) == false) + { + _error->DumpErrors(std::cerr, GlobalError::DEBUG, false); + return false; } - patch.read_diff(p); p.Close(); + HashStringList const hsl = patch_hash.GetHashStringList(); + if (hsl != I->ExpectedHashes) + return _error->Error("Hash Sum mismatch for uncompressed patch %s", patch_name.c_str()); } if (Debug == true) @@ -578,15 +659,36 @@ class RredMethod : public pkgAcqMethod { << " and writing results to " << Itm->DestFile << std::endl; - FILE *inp = fopen(Path.c_str(), "r"); - FILE *out = fopen(Itm->DestFile.c_str(), "w"); + FileFd inp, out; + if (inp.Open(Path, FileFd::ReadOnly, FileFd::Extension) == false) + { + std::cerr << "FAILED to open inp " << Path << std::endl; + return _error->Error("Failed to open inp %s", Path.c_str()); + } + if (out.Open(Itm->DestFile, FileFd::WriteOnly | FileFd::Create | FileFd::Empty | FileFd::BufferedWrite, FileFd::Extension) == false) + { + std::cerr << "FAILED to open out " << Itm->DestFile << std::endl; + return _error->Error("Failed to open out %s", Itm->DestFile.c_str()); + } - Hashes hash(Itm->ExpectedHashes); + Hashes end_hash(Itm->ExpectedHashes); + if (StartHashes.usable()) + { + Hashes start_hash(StartHashes); + patch.apply_against_file(out, inp, &start_hash, &end_hash); + if (start_hash.GetHashStringList() != StartHashes) + _error->Error("The input file hadn't the expected hash!"); + } + else + patch.apply_against_file(out, inp, nullptr, &end_hash); - patch.apply_against_file(out, inp, &hash); + out.Close(); + inp.Close(); - fclose(out); - fclose(inp); + if (_error->PendingError() == true) { + std::cerr << "FAILED to read or write files" << std::endl; + return false; + } if (Debug == true) { std::clog << "rred: finished file patching of " << Path << "." << std::endl; @@ -595,7 +697,7 @@ class RredMethod : public pkgAcqMethod { struct stat bufbase, bufpatch; if (stat(Path.c_str(), &bufbase) != 0 || stat(patch_name.c_str(), &bufpatch) != 0) - return _error->Errno("stat", _("Failed to stat")); + return _error->Errno("stat", _("Failed to stat %s"), Path.c_str()); struct timeval times[2]; times[0].tv_sec = bufbase.st_atime; @@ -605,32 +707,39 @@ class RredMethod : public pkgAcqMethod { return _error->Errno("utimes",_("Failed to set modification time")); if (stat(Itm->DestFile.c_str(), &bufbase) != 0) - return _error->Errno("stat", _("Failed to stat")); + return _error->Errno("stat", _("Failed to stat %s"), Itm->DestFile.c_str()); Res.LastModified = bufbase.st_mtime; Res.Size = bufbase.st_size; - Res.TakeHashes(hash); + Res.TakeHashes(end_hash); URIDone(Res); return true; } public: - RredMethod() : pkgAcqMethod("2.0",SingleInstance | SendConfig), Debug(false) {} + RredMethod() : aptMethod("rred", "2.0", SendConfig), Debug(false) {} }; int main(int argc, char **argv) { int i; bool just_diff = true; + bool test = false; Patch patch; if (argc <= 1) { - RredMethod Mth; - return Mth.Run(); + return RredMethod().Run(); } - if (argc > 1 && strcmp(argv[1], "-f") == 0) { + // Usage: rred -t input output diff ... + if (argc > 1 && strcmp(argv[1], "-t") == 0) { + // Read config files so we see compressors. + pkgInitConfig(*_config); + just_diff = false; + test = true; + i = 4; + } else if (argc > 1 && strcmp(argv[1], "-f") == 0) { just_diff = false; i = 2; } else { @@ -643,17 +752,31 @@ int main(int argc, char **argv) _error->DumpErrors(std::cerr); exit(1); } - patch.read_diff(p); + if (patch.read_diff(p, NULL) == false) + { + _error->DumpErrors(std::cerr); + exit(2); + } } - if (just_diff) { - patch.write_diff(stdout); + if (test) { + FileFd out, inp; + std::cerr << "Patching " << argv[2] << " into " << argv[3] << "\n"; + inp.Open(argv[2], FileFd::ReadOnly,FileFd::Extension); + out.Open(argv[3], FileFd::WriteOnly | FileFd::Create | FileFd::Empty | FileFd::BufferedWrite, FileFd::Extension); + patch.apply_against_file(out, inp); + out.Close(); + } else if (just_diff) { + FileFd out; + out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly | FileFd::Create); + patch.write_diff(out); + out.Close(); } else { - FILE *out, *inp; - out = stdout; - inp = stdin; - + FileFd out, inp; + out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly | FileFd::Create | FileFd::BufferedWrite); + inp.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly); patch.apply_against_file(out, inp); + out.Close(); } return 0; }