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-rw-r--r--methods/rred.cc788
1 files changed, 788 insertions, 0 deletions
diff --git a/methods/rred.cc b/methods/rred.cc
new file mode 100644
index 0000000..d4cf105
--- /dev/null
+++ b/methods/rred.cc
@@ -0,0 +1,788 @@
+// Copyright (c) 2014 Anthony Towns
+//
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+
+#include <config.h>
+
+#include "aptmethod.h"
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/hashes.h>
+#include <apt-pkg/init.h>
+#include <apt-pkg/strutl.h>
+
+#include <iostream>
+#include <list>
+#include <string>
+#include <vector>
+#include <stddef.h>
+
+#include <assert.h>
+#include <errno.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+
+#include <apti18n.h>
+
+#define BLOCK_SIZE (512*1024)
+
+class MemBlock {
+ char *start;
+ size_t size;
+ char *free;
+ MemBlock *next;
+
+ explicit MemBlock(size_t size) : size(size), next(NULL)
+ {
+ free = start = new char[size];
+ }
+
+ size_t avail(void) { return size - (free - start); }
+
+ public:
+
+ MemBlock(void) {
+ free = start = new char[BLOCK_SIZE];
+ size = BLOCK_SIZE;
+ next = NULL;
+ }
+
+ ~MemBlock() {
+ delete [] start;
+ delete next;
+ }
+
+ void clear(void) {
+ free = start;
+ if (next)
+ next->clear();
+ }
+
+ char *add_easy(char *src, size_t len, char *last)
+ {
+ if (last) {
+ for (MemBlock *k = this; k; k = k->next) {
+ if (k->free == last) {
+ if (len <= k->avail()) {
+ char *n = k->add(src, len);
+ assert(last == n);
+ if (last == n)
+ return NULL;
+ return n;
+ } else {
+ break;
+ }
+ } else if (last >= start && last < free) {
+ break;
+ }
+ }
+ }
+ return add(src, len);
+ }
+
+ char *add(char *src, size_t len) {
+ if (len > avail()) {
+ if (!next) {
+ if (len > BLOCK_SIZE) {
+ next = new MemBlock(len);
+ } else {
+ next = new MemBlock;
+ }
+ }
+ return next->add(src, len);
+ }
+ char *dst = free;
+ free += len;
+ memcpy(dst, src, len);
+ return dst;
+ }
+};
+
+struct Change {
+ /* Ordering:
+ *
+ * 1. write out <offset> lines unchanged
+ * 2. skip <del_cnt> lines from source
+ * 3. write out <add_cnt> lines (<add>/<add_len>)
+ */
+ size_t offset;
+ size_t del_cnt;
+ size_t add_cnt; /* lines */
+ size_t add_len; /* bytes */
+ char *add;
+
+ explicit Change(size_t off)
+ {
+ offset = off;
+ del_cnt = add_cnt = add_len = 0;
+ add = NULL;
+ }
+
+ /* actually, don't write <lines> lines from <add> */
+ void skip_lines(size_t lines)
+ {
+ while (lines > 0) {
+ char *s = (char*) memchr(add, '\n', add_len);
+ assert(s != NULL);
+ s++;
+ add_len -= (s - add);
+ add_cnt--;
+ lines--;
+ if (add_len == 0) {
+ add = NULL;
+ assert(add_cnt == 0);
+ assert(lines == 0);
+ } else {
+ add = s;
+ assert(add_cnt > 0);
+ }
+ }
+ }
+};
+
+class FileChanges {
+ std::list<struct Change> changes;
+ std::list<struct Change>::iterator where;
+ size_t pos; // line number is as far left of iterator as possible
+
+ bool pos_is_okay(void) const
+ {
+#ifdef POSDEBUG
+ size_t cpos = 0;
+ std::list<struct Change>::const_iterator x;
+ for (x = changes.begin(); x != where; ++x) {
+ assert(x != changes.end());
+ cpos += x->offset + x->add_cnt;
+ }
+ return cpos == pos;
+#else
+ return true;
+#endif
+ }
+
+ public:
+ FileChanges() {
+ where = changes.end();
+ pos = 0;
+ }
+
+ std::list<struct Change>::iterator begin(void) { return changes.begin(); }
+ std::list<struct Change>::iterator end(void) { return changes.end(); }
+
+ std::list<struct Change>::reverse_iterator rbegin(void) { return changes.rbegin(); }
+ std::list<struct Change>::reverse_iterator rend(void) { return changes.rend(); }
+
+ void add_change(Change c) {
+ assert(pos_is_okay());
+ go_to_change_for(c.offset);
+ assert(pos + where->offset == c.offset);
+ if (c.del_cnt > 0)
+ delete_lines(c.del_cnt);
+ assert(pos + where->offset == c.offset);
+ if (c.add_len > 0) {
+ assert(pos_is_okay());
+ if (where->add_len > 0)
+ new_change();
+ assert(where->add_len == 0 && where->add_cnt == 0);
+
+ where->add_len = c.add_len;
+ where->add_cnt = c.add_cnt;
+ where->add = c.add;
+ }
+ assert(pos_is_okay());
+ merge();
+ assert(pos_is_okay());
+ }
+
+ private:
+ void merge(void)
+ {
+ while (where->offset == 0 && where != changes.begin()) {
+ left();
+ }
+ std::list<struct Change>::iterator next = where;
+ ++next;
+
+ while (next != changes.end() && next->offset == 0) {
+ where->del_cnt += next->del_cnt;
+ next->del_cnt = 0;
+ if (next->add == NULL) {
+ next = changes.erase(next);
+ } else if (where->add == NULL) {
+ where->add = next->add;
+ where->add_len = next->add_len;
+ where->add_cnt = next->add_cnt;
+ next = changes.erase(next);
+ } else {
+ ++next;
+ }
+ }
+ }
+
+ void go_to_change_for(size_t line)
+ {
+ while(where != changes.end()) {
+ if (line < pos) {
+ left();
+ continue;
+ }
+ if (pos + where->offset + where->add_cnt <= line) {
+ right();
+ continue;
+ }
+ // line is somewhere in this slot
+ if (line < pos + where->offset) {
+ break;
+ } else if (line == pos + where->offset) {
+ return;
+ } else {
+ split(line - pos);
+ right();
+ return;
+ }
+ }
+ /* it goes before this patch */
+ insert(line-pos);
+ }
+
+ void new_change(void) { insert(where->offset); }
+
+ void insert(size_t offset)
+ {
+ assert(pos_is_okay());
+ assert(where == changes.end() || offset <= where->offset);
+ if (where != changes.end())
+ where->offset -= offset;
+ changes.insert(where, Change(offset));
+ --where;
+ assert(pos_is_okay());
+ }
+
+ void split(size_t offset)
+ {
+ assert(pos_is_okay());
+
+ assert(where->offset < offset);
+ assert(offset < where->offset + where->add_cnt);
+
+ size_t keep_lines = offset - where->offset;
+
+ Change before(*where);
+
+ where->del_cnt = 0;
+ where->offset = 0;
+ where->skip_lines(keep_lines);
+
+ before.add_cnt = keep_lines;
+ before.add_len -= where->add_len;
+
+ changes.insert(where, before);
+ --where;
+ assert(pos_is_okay());
+ }
+
+ void delete_lines(size_t cnt)
+ {
+ std::list<struct Change>::iterator x = where;
+ assert(pos_is_okay());
+ while (cnt > 0)
+ {
+ size_t del;
+ del = x->add_cnt;
+ if (del > cnt)
+ del = cnt;
+ x->skip_lines(del);
+ cnt -= del;
+
+ ++x;
+ if (x == changes.end()) {
+ del = cnt;
+ } else {
+ del = x->offset;
+ if (del > cnt)
+ del = cnt;
+ x->offset -= del;
+ }
+ where->del_cnt += del;
+ cnt -= del;
+ }
+ assert(pos_is_okay());
+ }
+
+ void left(void) {
+ assert(pos_is_okay());
+ --where;
+ pos -= where->offset + where->add_cnt;
+ assert(pos_is_okay());
+ }
+
+ void right(void) {
+ assert(pos_is_okay());
+ pos += where->offset + where->add_cnt;
+ ++where;
+ assert(pos_is_okay());
+ }
+};
+
+class Patch {
+ FileChanges filechanges;
+ MemBlock add_text;
+
+ static bool retry_fwrite(char *b, size_t l, FileFd &f, Hashes * const start_hash, Hashes * const end_hash = nullptr) APT_NONNULL(1)
+ {
+ 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(FileFd &o, FileFd &i,
+ Hashes * const start_hash, Hashes * const end_hash)
+ {
+ char buffer[BLOCK_SIZE];
+ 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(FileFd &o, FileFd &i, size_t n,
+ Hashes * const start_hash, Hashes * const end_hash)
+ {
+ char buffer[BLOCK_SIZE];
+ while (n > 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, start_hash, end_hash);
+ }
+ }
+
+ static void skip_lines(FileFd &i, int n, Hashes * const start_hash)
+ {
+ char buffer[BLOCK_SIZE];
+ while (n > 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(FileFd &o, char *p, size_t s, Hashes *hash) APT_NONNULL(2) {
+ retry_fwrite(p, s, o, nullptr, hash);
+ }
+
+ public:
+
+ bool read_diff(FileFd &f, Hashes * const h)
+ {
+ char buffer[BLOCK_SIZE];
+ bool cmdwanted = true;
+
+ Change ch(std::numeric_limits<size_t>::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;
+ errno = 0;
+ s = strtoul(buffer, &m, 10);
+ if (unlikely(m == buffer || s == std::numeric_limits<unsigned long>::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<unsigned long>::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;
+ ch.add = NULL;
+ ch.add_cnt = 0;
+ ch.add_len = 0;
+ ch.offset = s;
+ 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;
+ ch.add_len = 0;
+ ch.offset = s - 1;
+ 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;
+ ch.add_cnt = 0;
+ 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 (strcmp(buffer, ".\n") == 0) {
+ cmdwanted = true;
+ filechanges.add_change(ch);
+ } else {
+ char *last = NULL;
+ char *add;
+ size_t l;
+ if (ch.add)
+ last = ch.add + ch.add_len;
+ l = strlen(buffer);
+ add = add_text.add_easy(buffer, l, last);
+ if (!add) {
+ ch.add_len += l;
+ ch.add_cnt++;
+ } else {
+ if (ch.add) {
+ filechanges.add_change(ch);
+ ch.del_cnt = 0;
+ }
+ ch.offset += ch.add_cnt;
+ ch.add = add;
+ ch.add_len = l;
+ ch.add_cnt = 1;
+ }
+ }
+ }
+ } while(f.ReadLine(buffer, sizeof(buffer)));
+ return true;
+ }
+
+ void write_diff(FileFd &f)
+ {
+ unsigned long long line = 0;
+ std::list<struct Change>::reverse_iterator ch;
+ for (ch = filechanges.rbegin(); ch != filechanges.rend(); ++ch) {
+ line += ch->offset + ch->del_cnt;
+ }
+
+ for (ch = filechanges.rbegin(); ch != filechanges.rend(); ++ch) {
+ std::list<struct Change>::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) {
+ strprintf(buf, "%llua\n", line);
+ } else if (ch->del_cnt == 1) {
+ strprintf(buf, "%lluc\n", line+1);
+ } else {
+ 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);
+
+ buf = ".\n";
+ f.Write(buf.c_str(), buf.length());
+ } else if (ch->del_cnt == 1) {
+ strprintf(buf, "%llud\n", line+1);
+ f.Write(buf.c_str(), buf.length());
+ } else if (ch->del_cnt > 1) {
+ 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(FileFd &out, FileFd &in,
+ Hashes * const start_hash = nullptr, Hashes * const end_hash = nullptr)
+ {
+ std::list<struct Change>::iterator ch;
+ for (ch = filechanges.begin(); ch != filechanges.end(); ++ch) {
+ 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, start_hash, end_hash);
+ out.Flush();
+ }
+};
+
+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 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
+
+ FetchResult Res;
+ Res.Filename = Itm->DestFile;
+ if (Itm->Uri.empty())
+ {
+ Path = Itm->DestFile;
+ Itm->DestFile.append(".result");
+ } else
+ URIStart(Res);
+
+ std::vector<PDiffFile> 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)
+ {
+ 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();
+ std::vector<std::string> patches = GetListOfFilesInDir(flNotFile(Path), "gz", true, false);
+ _error->RevertToStack();
+
+ std::string const baseName = Path + ".ed.";
+ unsigned int seen_patches = 0;
+ for (std::vector<std::string>::const_iterator p = patches.begin();
+ p != patches.end(); ++p)
+ {
+ if (p->compare(0, baseName.length(), baseName) == 0)
+ {
+ 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<PDiffFile>::iterator I = patchfiles.begin();
+ I != patchfiles.end();
+ ++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 ||
+ patch.read_diff(p, &patch_hash) == false)
+ {
+ _error->DumpErrors(std::cerr, GlobalError::DEBUG, false);
+ return false;
+ }
+ 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)
+ std::clog << "Applying patches against " << Path
+ << " and writing results to " << Itm->DestFile
+ << std::endl;
+
+ FileFd inp, out;
+ if (inp.Open(Path, FileFd::ReadOnly, FileFd::Extension) == false)
+ {
+ if (Debug == true)
+ std::clog << "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)
+ {
+ if (Debug == true)
+ std::clog << "FAILED to open out " << Itm->DestFile << std::endl;
+ return _error->Error("Failed to open out %s", Itm->DestFile.c_str());
+ }
+
+ 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);
+
+ out.Close();
+ inp.Close();
+
+ if (_error->PendingError() == true) {
+ if (Debug == true)
+ std::clog << "FAILED to read or write files" << std::endl;
+ return false;
+ }
+
+ if (Debug == true) {
+ std::clog << "rred: finished file patching of " << Path << "." << std::endl;
+ }
+
+ 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 %s"), Path.c_str());
+
+ struct timeval times[2];
+ times[0].tv_sec = bufbase.st_atime;
+ times[1].tv_sec = bufpatch.st_mtime;
+ times[0].tv_usec = times[1].tv_usec = 0;
+ if (utimes(Itm->DestFile.c_str(), times) != 0)
+ return _error->Errno("utimes",_("Failed to set modification time"));
+
+ if (stat(Itm->DestFile.c_str(), &bufbase) != 0)
+ return _error->Errno("stat", _("Failed to stat %s"), Itm->DestFile.c_str());
+
+ Res.LastModified = bufbase.st_mtime;
+ Res.Size = bufbase.st_size;
+ Res.TakeHashes(end_hash);
+ URIDone(Res);
+
+ return true;
+ }
+
+ public:
+ RredMethod() : aptMethod("rred", "2.0", SendConfig), Debug(false)
+ {
+ SeccompFlags = aptMethod::BASE | aptMethod::DIRECTORY;
+ }
+};
+
+int main(int argc, char **argv)
+{
+ int i;
+ bool just_diff = true;
+ bool test = false;
+ Patch patch;
+
+ if (argc <= 1) {
+ return RredMethod().Run();
+ }
+
+ // 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 {
+ i = 1;
+ }
+
+ for (; i < argc; i++) {
+ FileFd p;
+ if (p.Open(argv[i], FileFd::ReadOnly) == false) {
+ _error->DumpErrors(std::cerr);
+ exit(1);
+ }
+ if (patch.read_diff(p, NULL) == false)
+ {
+ _error->DumpErrors(std::cerr);
+ exit(2);
+ }
+ }
+
+ 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 {
+ 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;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-24 22:54:43 +0000