if reading of autobit state failed, let write fail

[apt.git] / methods / rred.cc

diff --git a/methods/rred.cc b/methods/rred.cc
index 7c2ccd98ea57948f3cd2719bc98855bcfbfa2036..51af3755784567aa84d47428b1f713d7ac384a81 100644 (file)
--- a/methods/rred.cc
+++ b/methods/rred.cc
@@ -7,12 +7,13 @@
 
 #include <config.h>
 
+#include <apt-pkg/init.h>
 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/error.h>
-#include <apt-pkg/acquire-method.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/hashes.h>
 #include <apt-pkg/configuration.h>
+#include "aptmethod.h"
 
 #include <stddef.h>
 #include <iostream>
@@ -38,7 +39,7 @@ class MemBlock {
    char *free;
    MemBlock *next;
 
-   MemBlock(size_t size) : size(size), next(NULL)
+   explicit MemBlock(size_t size) : size(size), next(NULL)
    {
       free = start = new char[size];
    }
@@ -117,7 +118,7 @@ struct Change {
    size_t add_len; /* bytes */
    char *add;
 
-   Change(size_t off)
+   explicit Change(size_t off)
    {
       offset = off;
       del_cnt = add_cnt = add_len = 0;
@@ -489,7 +490,11 @@ class Patch {
       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) {
@@ -529,10 +534,11 @@ class Patch {
         dump_mem(out, ch->add, ch->add_len, hash);
       }
       dump_rest(out, in, hash);
+      out.Flush();
    }
 };
 
-class RredMethod : public pkgAcqMethod {
+class RredMethod : public aptMethod {
    private:
       bool Debug;
 
@@ -621,7 +627,7 @@ class RredMethod : public pkgAcqMethod {
            if (p.Open(patch_name, FileFd::ReadOnly, FileFd::Gzip) == false ||
                  patch.read_diff(p, &patch_hash) == false)
            {
-              _error->DumpErrors(std::cerr);
+              _error->DumpErrors(std::cerr, GlobalError::DEBUG, false);
               return false;
            }
            p.Close();
@@ -641,7 +647,7 @@ class RredMethod : public pkgAcqMethod {
            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::Extension) == false)
+        if (out.Open(Itm->DestFile, FileFd::WriteOnly | FileFd::Create | 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());
@@ -653,6 +659,11 @@ class RredMethod : public pkgAcqMethod {
         out.Close();
         inp.Close();
 
+        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;
         }
@@ -660,7 +671,7 @@ 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;
@@ -670,7 +681,7 @@ 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;
@@ -680,32 +691,29 @@ class RredMethod : public pkgAcqMethod {
         return true;
       }
 
-      bool Configuration(std::string Message) APT_OVERRIDE
-      {
-        if (pkgAcqMethod::Configuration(Message) == false)
-           return false;
-
-        DropPrivsOrDie();
-
-        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 {
@@ -725,15 +733,24 @@ int main(int argc, char **argv)
       }
    }
 
-   if (just_diff) {
+   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::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);
+      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;
 }