further refactor, extract GetReleaseForSourceRecord() out of FindSrc(), write out...

[apt.git] / methods / rred.cc

diff --git a/methods/rred.cc b/methods/rred.cc
index 262c78cabdfa99a2425767199ae6ff7ff7fbc00f..7c65f8f9223a30d15d552d27d7dfb4ebdc90a852 100644 (file)
--- a/methods/rred.cc
+++ b/methods/rred.cc
@@ -1,10 +1,13 @@
 // Includes                                                                    /*{{{*/
 // Includes                                                                    /*{{{*/

+#include <config.h>
+

 #include <apt-pkg/fileutl.h>
 #include <apt-pkg/mmap.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/fileutl.h>
 #include <apt-pkg/mmap.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 <sys/stat.h>
 #include <sys/uio.h>
 
 #include <sys/stat.h>
 #include <sys/uio.h>


@@ -33,10 +36,10 @@ class RredMethod : public pkgAcqMethod {
        // return values
        enum State {ED_OK, ED_ORDERING, ED_PARSER, ED_FAILURE, MMAP_FAILED};
 
        // 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;
                     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;
                                    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:
        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                  {{{
 };
                                                                                /*}}}*/
 /** \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
  */
  *  \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
                        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;
                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 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;
 
        // 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) {
 
        // 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);
        }
 
                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;
 }
                                                                                /*}}}*/
        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 {
                                        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');
        }
 }
                                                                                /*}}}*/
                } 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') {
        while (strlen(buffer) == (BUF_SIZE - 1) &&
               buffer[BUF_SIZE - 2] != '\n') {

-               fgets(buffer, BUF_SIZE, fin);
+               fin.ReadLine(buffer, BUF_SIZE);

                buffer[0] = ' ';
        }
 }
                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];
 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
 
    /* 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) {
    
    /* 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;
 }
                                                                                /*}}}*/
    }
    return result;
 }
                                                                                /*}}}*/

-struct EdCommand {                                                             /*{{{*/
+/* struct EdCommand                                                            {{{*/
+#ifdef _POSIX_MAPPED_FILES
+struct EdCommand {

   size_t data_start;
   size_t data_end;
   size_t data_lines;
   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 */
   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 {
                                                                                /*}}}*/
 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);
 
        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;
                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* 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 = (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;
 
 
        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;
                }
                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;
        }
                }
                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) {
                        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;
                        }
                }
                                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) {
                                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;
                                }
                        }
                                        iov_size = 0;
                                }
                        }


@@ -405,15 +431,15 @@ RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From,              /*{{{*/
        }
 
        if(iov_size) {
        }
 
        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)
                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
                else

-                       writev(out_file.Fd(), iov + i, IOV_COUNT);
+                       retry_writev(out_file.Fd(), iov + i, IOV_COUNT);

        }
 
        delete [] iov;
        }
 
        delete [] iov;


@@ -429,7 +455,7 @@ bool RredMethod::Fetch(FetchItem *Itm)                                              /*{{{*/
 {
    Debug = _config->FindB("Debug::pkgAcquire::RRed", false);
    URI Get = Itm->Uri;
 {
    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;
 
    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);
    // 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;
    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
    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) {
       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();
 
    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;
       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 (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
       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);
 
    Res.TakeHashes(Hash);
    URIDone(Res);