Fossil

/*
** Begin the process of generating a tarball.
**
** Initialize the GZIP compressor and the table of directory names.
*/
static void tar_begin(sqlite3_int64 mTime){
static void tar_begin(sqlite4_int64 mTime){
  assert( tball.aHdr==0 );
  tball.aHdr = fossil_malloc(512+512);
  memset(tball.aHdr, 0, 512+512);
  tball.zSpaces = (char*)&tball.aHdr[512];
  /* zPrevDir init */
  tball.zPrevDir = NULL;
  tball.nPrevDirAlloc = 0;

  char cType
){
  unsigned int cksum = 0;
  int i;
  memset(&tball.aHdr[148], ' ', 8);
  tball.aHdr[156] = cType;
  for(i=0; i<512; i++) cksum += tball.aHdr[i];
  sqlite3_snprintf(8, (char*)&tball.aHdr[148], "%07o", cksum);
  sqlite4_snprintf((char*)&tball.aHdr[148], 8, "%07o", cksum);
  tball.aHdr[155] = 0;
  gzip_step((char*)tball.aHdr, 512);
}


/*
** Build a header for a file or directory and write that header
** into the growing tarball.
*/
static void tar_add_header(
  const char *zName,     /* Name of the object */
  int nName,             /* Number of characters in zName */
  int iMode,             /* Mode.  0644 or 0755 */
  unsigned int mTime,    /* File modification time */
  int iSize,             /* Size of the object in bytes */
  char cType             /* Type of object:  
                            '0'==file. '2'==symlink. '5'==directory */
){
  /* set mode and modification time */
  sqlite3_snprintf(8, (char*)&tball.aHdr[100], "%07o", iMode);
  sqlite3_snprintf(12, (char*)&tball.aHdr[136], "%011o", mTime);
  sqlite4_snprintf((char*)&tball.aHdr[100], 8, "%07o", iMode);
  sqlite4_snprintf((char*)&tball.aHdr[136], 12, "%011o", mTime);

  /* see if we need to output a Pax Interchange Header */
  if( !is_iso646_name(zName, nName)
   || !tar_split_path(zName, nName, (char*)tball.aHdr, (char*)&tball.aHdr[345])
  ){
    int lastPage;
    /* add a file name for interoperability with older programs */
    approximate_split_path(zName, nName, (char*)tball.aHdr,
                           (char*)&tball.aHdr[345], 1);

    /* generate the Pax Interchange path header */
    blob_reset(&tball.pax);
    add_pax_header("path", zName, nName);

    /* set the header length, and write the header */
    sqlite3_snprintf(12, (char*)&tball.aHdr[124], "%011o",
    sqlite4_snprintf((char*)&tball.aHdr[124], 8, "%011o",
                     blob_size(&tball.pax));
    cksum_and_write_header('x');

    /* write the Pax Interchange data */
    gzip_step(blob_buffer(&tball.pax), blob_size(&tball.pax));
    lastPage = blob_size(&tball.pax) % 512;
    if( lastPage!=0 ){
      gzip_step(tball.zSpaces, 512 - lastPage);
    }

    /* generate an approximate path for the regular header */
    approximate_split_path(zName, nName, (char*)tball.aHdr,
                           (char*)&tball.aHdr[345], 0);
  }
  /* set the size */
  sqlite3_snprintf(12, (char*)&tball.aHdr[124], "%011o", iSize);
  sqlite4_snprintf((char*)&tball.aHdr[124], 12, "%011o", iSize);

  /* write the regular header */
  cksum_and_write_header(cType);
}


/*

){
  int i;
  for(i=nName-1; i>0 && zName[i]!='/'; i--){}
  if( i<=0 ) return;
  if( i < tball.nPrevDirAlloc && tball.zPrevDir[i]==0 &&
        memcmp(tball.zPrevDir, zName, i)==0 ) return;
  db_multi_exec("INSERT OR IGNORE INTO dir VALUES('%#q')", i, zName);
  if( sqlite3_changes(g.db)==0 ) return;
  if( sqlite4_changes(g.db)==0 ) return;
  tar_add_directory_of(zName, i-1, mTime);
  tar_add_header(zName, i, 0755, mTime, 0, '5');
  if( i >= tball.nPrevDirAlloc ){
    int nsize = tball.nPrevDirAlloc * 2;
    if(i+1 > nsize)
      nsize = i+1;
    tball.zPrevDir = fossil_realloc(tball.zPrevDir, nsize);

   * If we have a symlink, write its destination path (which is stored in
   * pContent) into header, and set content length to 0 to avoid storing path
   * as file content in the next step.  Since 'linkname' header is limited to
   * 100 bytes (-1 byte for terminating zero), if path is greater than that,
   * store symlink as a plain-text file. (Not sure how TAR handles long links.)
   */
  if( mPerm == PERM_LNK && n <= 100 ){
    sqlite3_snprintf(100, (char*)&tball.aHdr[157], "%s", blob_str(pContent));
    sqlite4_snprintf((char*)&tball.aHdr[157], 100, "%s", blob_str(pContent));
    cType = '2';
    n = 0;
  }

  tar_add_header(zName, nName, ( mPerm==PERM_EXE ) ? 0755 : 0644, 
                 mTime, n, cType);
  if( n ){

void test_tarball_cmd(void){
  int i;
  Blob zip;
  Blob file;
  if( g.argc<3 ){
    usage("ARCHIVE FILE....");
  }
  sqlite3_open(":memory:", &g.db);
  sqlite4_open(0, ":memory:", &g.db, SQLITE_OPEN_READWRITE);
  tar_begin(0);
  for(i=3; i<g.argc; i++){
    blob_zero(&file);
    blob_read_from_file(&file, g.argv[i]);
    tar_add_file(g.argv[i], &file,
                 file_wd_perm(g.argv[i]), file_wd_mtime(g.argv[i]));
    blob_reset(&file);