- add method to open (maybe) clearsigned files transparently

[apt.git] / methods / rred.cc

diff --git a/methods/rred.cc b/methods/rred.cc
index 6c55880ca1726c782bd1f939c50952a7f083c0ba..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>


@@ -12,7 +15,6 @@
 #include <utime.h>
 #include <stdio.h>
 #include <errno.h>
 #include <utime.h>
 #include <stdio.h>
 #include <errno.h>

-#include <zlib.h>

 #include <apti18n.h>
                                                                                /*}}}*/
 /** \brief RredMethod - ed-style incremential patch method                     {{{
 #include <apti18n.h>
                                                                                /*}}}*/
 /** \brief RredMethod - ed-style incremential patch method                     {{{


@@ -34,13 +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(gzFile &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 ignoreLineInFile(gzFile &fin, char *buffer) const;
-       void copyLinesFromFileToFile(FILE *fin, FILE *fout, unsigned int lines,
-                                   Hashes *hash, char *buffer) const;
-       void copyLinesFromFileToFile(gzFile &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;


@@ -69,10 +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(gzFile &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 (gzgets(ed_cmds, buffer, BUF_SIZE) == 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;


@@ -127,7 +126,7 @@ RredMethod::State RredMethod::applyFile(gzFile &ed_cmds, FILE *in_file, FILE *ou
        unsigned char mode = *idx;
 
        // save the current position
        unsigned char mode = *idx;
 
        // save the current position

-       unsigned const long pos = gztell(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;


@@ -161,7 +160,7 @@ RredMethod::State RredMethod::applyFile(gzFile &ed_cmds, FILE *in_file, FILE *ou
 
        // include data from ed script
        if (mode == MODE_CHANGED || mode == MODE_ADDED) {
 
        // include data from ed script
        if (mode == MODE_CHANGED || mode == MODE_ADDED) {

-               gzseek(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);
        }
 


@@ -175,44 +174,24 @@ RredMethod::State RredMethod::applyFile(gzFile &ed_cmds, FILE *in_file, FILE *ou
        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::copyLinesFromFileToFile(gzFile &fin, FILE *fout, unsigned int lines,/*{{{*/
-                                       Hashes *hash, char *buffer) const {
-       while (0 < lines--) {
-               do {
-                       gzgets(fin, buffer, BUF_SIZE);
-                       size_t const written = fwrite(buffer, 1, strlen(buffer), fout);
-                       hash->Add((unsigned char*)buffer, written);
-               } 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);
-               buffer[0] = ' ';
-       }
-}
-                                                                               /*}}}*/
-void RredMethod::ignoreLineInFile(gzFile &fin, char *buffer) const {           /*{{{*/
-       gzgets(fin, buffer, BUF_SIZE);
-       while (strlen(buffer) == (BUF_SIZE - 1) &&
-              buffer[BUF_SIZE - 2] != '\n') {
-               gzgets(fin, buffer, BUF_SIZE);
+               fin.ReadLine(buffer, BUF_SIZE);

                buffer[0] = ' ';
        }
 }
                buffer[0] = ' ';
        }
 }


@@ -220,21 +199,18 @@ void RredMethod::ignoreLineInFile(gzFile &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");
-   gzFile fPatch = Patch.gzFd();
-   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;
 }


@@ -250,28 +226,32 @@ 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 {
 #ifdef _POSIX_MAPPED_FILES
 #endif
                                                                                /*}}}*/
 RredMethod::State RredMethod::patchMMap(FileFd &Patch, FileFd &From,           /*{{{*/
                                        FileFd &out_file, Hashes *hash) const {
 #ifdef _POSIX_MAPPED_FILES

-       MMap ed_cmds(MMap::ReadOnly);
-       if (Patch.gzFd() != NULL) {
-               unsigned long mapSize = Patch.Size();
-               DynamicMMap* dyn = new DynamicMMap(0, mapSize, 0);
-               if (dyn->validData() == false) {
-                       delete dyn;
-                       return MMAP_FAILED;
-               }
-               dyn->AddSize(mapSize);
-               gzread(Patch.gzFd(), dyn->Data(), mapSize);
-               ed_cmds = *dyn;
-       } else
-               ed_cmds = MMap(Patch, MMap::ReadOnly);
-
+       MMap ed_cmds(Patch, MMap::ReadOnly);

        MMap in_file(From, 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;


@@ -280,10 +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;
 


@@ -367,7 +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;
        }


@@ -406,7 +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;
                        }
                }


@@ -431,7 +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;
                                }
                        }


@@ -446,15 +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;


@@ -470,7 +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;


@@ -486,7 +471,7 @@ 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::ReadOnlyGzip);
+   FileFd Patch(Path+".ed",FileFd::ReadOnly, FileFd::Gzip);

    FileFd To(Itm->DestFile,FileFd::WriteAtomic);   
    To.EraseOnFailure();
    if (_error->PendingError() == true)
    FileFd To(Itm->DestFile,FileFd::WriteAtomic);   
    To.EraseOnFailure();
    if (_error->PendingError() == true)


@@ -523,7 +508,7 @@ bool RredMethod::Fetch(FetchItem *Itm)                                              /*{{{*/
       and use the access time from the "old" file */
    struct stat BufBase, BufPatch;
    if (stat(Path.c_str(),&BufBase) != 0 ||
       and use the access time from the "old" file */
    struct stat BufBase, BufPatch;
    if (stat(Path.c_str(),&BufBase) != 0 ||

-       stat(string(Path+".ed").c_str(),&BufPatch) != 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;