Fossil

    return 0;
  }
}

/*
** Add all files in the sfile temp table.
**
** Automatically exclude the repository file and any other files
** with reserved names. Also exclude files that are beneath an 
** existing symlink.
*/
static int add_files_in_sfile(int vid){
  const char *zRepo;        /* Name of the repository database file */
  int nAdd = 0;             /* Number of files added */
  int i;                    /* Loop counter */
  const char *zReserved;    /* Name of a reserved file */
  Blob repoName;            /* Treename of the repository */

    zRepo = blob_str(&repoName);
  }
  if( filenames_are_case_sensitive() ){
    xCmp = fossil_strcmp;
  }else{
    xCmp = fossil_stricmp;
  }
  db_prepare(&loop, 
     "SELECT pathname FROM sfile"
     " WHERE pathname NOT IN ("
       "SELECT sfile.pathname FROM vfile, sfile"
       " WHERE vfile.islink"
       "   AND NOT vfile.deleted"
       "   AND sfile.pathname>(vfile.pathname||'/')"
       "   AND sfile.pathname<(vfile.pathname||'0'))"
     " ORDER BY pathname");
  while( db_step(&loop)==SQLITE_ROW ){
    const char *zToAdd = db_column_text(&loop, 0);
    if( fossil_strcmp(zToAdd, zRepo)==0 ) continue;
    if( strchr(zToAdd,'/') ){
      if( file_is_reserved_name(zToAdd, -1) ) continue;
    }else{
      for(i=0; (zReserved = fossil_reserved_name(i, 0))!=0; i++){
        if( xCmp(zToAdd, zReserved)==0 ) break;
      }
      if( zReserved ) continue;
    }
    nAdd += add_one_file(zToAdd, vid);
  }
  db_finalize(&loop);
  blob_reset(&repoName);
  return nAdd;
}

  } aHook[5];
  char *azDeleteOnFail[3];  /* Files to delete on a failure */
  char *azBeforeCommit[5];  /* Commands to run prior to COMMIT */
  int nBeforeCommit;        /* Number of entries in azBeforeCommit */
  int nPriorChanges;        /* sqlite3_total_changes() at transaction start */
  const char *zStartFile;   /* File in which transaction was started */
  int iStartLine;           /* Line of zStartFile where transaction started */
  int (*xAuth)(void*,int,const char*,const char*,const char*,const char*);
  void *pAuthArg;           /* Argument to the authorizer */
  const char *zAuthName;    /* Name of the authorizer */
} db = {0, 0, 0, 0, 0, 0, };

/*
** Arrange for the given file to be deleted on a failure.
*/
void db_delete_on_failure(const char *zFilename){
  assert( db.nDeleteOnFail<count(db.azDeleteOnFail) );

      db.aHook[i].xHook = xS;
    }
  }
  db.aHook[db.nCommitHook].sequence = sequence;
  db.aHook[db.nCommitHook].xHook = x;
  db.nCommitHook++;
}

/*
** Set or unset the query authorizer callback function
*/
void db_set_authorizer(
  int(*xAuth)(void*,int,const char*,const char*,const char*,const char*),
  void *pArg,
  const char *zName /* for tracing */
){
  if( db.xAuth ){
    fossil_panic("multiple active db_set_authorizer() calls");
  }
  if( g.db ) sqlite3_set_authorizer(g.db, xAuth, pArg);
  db.xAuth = xAuth;
  db.pAuthArg = pArg;
  db.zAuthName = zName;
  if( g.fSqlTrace ) fossil_trace("-- set authorizer %s\n", zName);
}
void db_clear_authorizer(void){
  if( db.zAuthName && g.fSqlTrace ){
    fossil_trace("-- discontinue authorizer %s\n", db.zAuthName);
  }
  if( g.db ) sqlite3_set_authorizer(g.db, 0, 0);
  db.xAuth = 0;
  db.pAuthArg = 0;
}

#if INTERFACE
/*
** Possible flags to db_vprepare
*/
#define DB_PREPARE_IGNORE_ERROR  0x001  /* Suppress errors */
#define DB_PREPARE_PERSISTENT    0x002  /* Stmt will stick around for a while */

** database.
*/
void db_init_database(
  const char *zFileName,   /* Name of database file to create */
  const char *zSchema,     /* First part of schema */
  ...                      /* Additional SQL to run.  Terminate with NULL. */
){
  sqlite3 *xdb;
  int rc;
  const char *zSql;
  va_list ap;

  xdb = db_open(zFileName ? zFileName : ":memory:");
  sqlite3_exec(xdb, "BEGIN EXCLUSIVE", 0, 0, 0);
  if( db.xAuth ){
    sqlite3_set_authorizer(xdb, db.xAuth, db.pAuthArg);
  }
  rc = sqlite3_exec(xdb, zSchema, 0, 0, 0);
  if( rc!=SQLITE_OK ){
    db_err("%s", sqlite3_errmsg(xdb));
  }
  va_start(ap, zSchema);
  while( (zSql = va_arg(ap, const char*))!=0 ){
    rc = sqlite3_exec(xdb, zSql, 0, 0, 0);
    if( rc!=SQLITE_OK ){
      db_err("%s", sqlite3_errmsg(xdb));
    }
  }
  va_end(ap);
  sqlite3_exec(xdb, "COMMIT", 0, 0, 0);
  if( zFileName || g.db!=0 ){
    sqlite3_close(xdb);
  }else{
    g.db = xdb;
  }
}

/*
** Function to return the number of seconds since 1970.  This is
** the same as strftime('%s','now') but is more compact.
*/

**
** Check for unfinalized statements and report errors if the reportErrors
** argument is true.  Ignore unfinalized statements when false.
*/
void db_close(int reportErrors){
  sqlite3_stmt *pStmt;
  if( g.db==0 ) return;
  sqlite3_set_authorizer(g.db, 0, 0);
  if( g.fSqlStats ){
    int cur, hiwtr;
    sqlite3_db_status(g.db, SQLITE_DBSTATUS_LOOKASIDE_USED, &cur, &hiwtr, 0);
    fprintf(stderr, "-- LOOKASIDE_USED         %10d %10d\n", cur, hiwtr);
    sqlite3_db_status(g.db, SQLITE_DBSTATUS_LOOKASIDE_HIT, &cur, &hiwtr, 0);
    fprintf(stderr, "-- LOOKASIDE_HIT                     %10d\n", hiwtr);
    sqlite3_db_status(g.db, SQLITE_DBSTATUS_LOOKASIDE_MISS_SIZE, &cur,&hiwtr,0);

    sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &cur, &hiwtr, 0);
    fprintf(stderr, "-- PCACHE_OVFLOW          %10d %10d\n", cur, hiwtr);
    fprintf(stderr, "-- prepared statements    %10d\n", db.nPrepare);
  }
  while( db.pAllStmt ){
    db_finalize(db.pAllStmt);
  }
  if( db.nBegin ){
    if( reportErrors ){
      fossil_warning("Transaction started at %s:%d never commits",
                     db.zStartFile, db.iStartLine);
    }
    db_end_transaction(1);
  }
  pStmt = 0;
  sqlite3_busy_timeout(g.db, 0);
  g.dbIgnoreErrors++; /* Stop "database locked" warnings */
  sqlite3_exec(g.db, "PRAGMA optimize", 0, 0, 0);
  g.dbIgnoreErrors--;
  db_close_config();

  /* If the localdb has a lot of unused free space,
  ** then VACUUM it as we shut down.
  */

*/
void db_panic_close(void){
  if( g.db ){
    int rc;
    sqlite3_wal_checkpoint(g.db, 0);
    rc = sqlite3_close(g.db);
    if( g.fSqlTrace ) fossil_trace("-- sqlite3_close(%d)\n", rc);
    db_clear_authorizer();
  }
  g.db = 0;
  g.repositoryOpen = 0;
  g.localOpen = 0;
}

/*

** This routines RepoFILE - that zFilename is always a file under management.
**
** On Windows, always return False.
*/
int file_islink(const char *zFilename){
  return file_perm(zFilename, RepoFILE)==PERM_LNK;
}

/*
** Check every sub-directory of zRoot along the path to zFile.
** If any sub-directory is really an ordinary file or a symbolic link,
** return an integer which is the length of the prefix of zFile which
** is the name of that object.  Return 0 if all no non-directory
** objects are found along the path.
**
** Example:  Given inputs
**
**     zRoot = /home/alice/project1
**     zFile = /home/alice/project1/main/src/js/fileA.js
**
** Look for objects in the following order:
**
**      /home/alice/project/main
**      /home/alice/project/main/src
**      /home/alice/project/main/src/js
**
** If any of those objects exist and are something other than a directory
** then return the length of the name of the first non-directory object
** seen.
*/
int file_nondir_objects_on_path(const char *zRoot, const char *zFile){
  int i = (int)strlen(zRoot);
  char *z = fossil_strdup(zFile);
  assert( fossil_strnicmp(zRoot, z, i)==0 );
  if( i && zRoot[i-1]=='/' ) i--;
  while( z[i]=='/' ){
    int j, rc;
    for(j=i+1; z[j] && z[j]!='/'; j++){}
    if( z[j]!='/' ) break;
    z[j] = 0;
    rc = file_isdir(z, SymFILE);
    if( rc!=1 ){
      if( rc==2 ){
        fossil_free(z);
        return j;
      }
      break;
    }
    z[j] = '/';
    i = j;
  }
  fossil_free(z);
  return 0;
}

/*
** Return 1 if zFilename is a directory.  Return 0 if zFilename
** does not exist.  Return 2 if zFilename exists but is something
** other than a directory.
*/
int file_isdir(const char *zFilename, int eFType){

** zFilename is a symbolic link, it is the object that zFilename points
** to that is modified.
*/
int file_setexe(const char *zFilename, int onoff){
  int rc = 0;
#if !defined(_WIN32)
  struct stat buf;
  if( fossil_stat(zFilename, &buf, RepoFILE)!=0 
   || S_ISLNK(buf.st_mode)
   || S_ISDIR(buf.st_mode)
  ){
    return 0;
  }
  if( onoff ){
    int targetMode = (buf.st_mode & 0444)>>2;
    if( (buf.st_mode & 0100)==0 ){
      chmod(zFilename, buf.st_mode | targetMode);
      rc = 1;

  if( dryRunFlag!=0 ){
    fossil_print("dry-run: would have touched %d file(s)\n",
                 changeCount);
  }else{
    fossil_print("Touched %d file(s)\n", changeCount);
  }
}

/*
** Returns non-zero if the specified file name ends with any reserved name,
** e.g.: _FOSSIL_ or .fslckout.  Specifically, it returns 1 for exact match
** or 2 for a tail match on a longer file name.
**
** For the sake of efficiency, zFilename must be a canonical name, e.g. an
** absolute path using only forward slash ('/') as a directory separator.
**
** nFilename must be the length of zFilename.  When negative, strlen() will
** be used to calculate it.
*/
int file_is_reserved_name(const char *zFilename, int nFilename){
  const char *zEnd;  /* one-after-the-end of zFilename */
  int gotSuffix = 0; /* length of suffix (-wal, -shm, -journal) */

  assert( zFilename && "API misuse" );
  if( nFilename<0 ) nFilename = (int)strlen(zFilename);
  if( nFilename<8 ) return 0; /* strlen("_FOSSIL_") */
  zEnd = zFilename + nFilename;
  if( nFilename>=12 ){ /* strlen("_FOSSIL_-(shm|wal)") */
    /* Check for (-wal, -shm, -journal) suffixes, with an eye towards
    ** runtime speed. */
    if( zEnd[-4]=='-' ){
      if( fossil_strnicmp("wal", &zEnd[-3], 3)
       && fossil_strnicmp("shm", &zEnd[-3], 3) ){
        return 0;
      }
      gotSuffix = 4;
    }else if( nFilename>=16 && zEnd[-8]=='-' ){ /*strlen(_FOSSIL_-journal) */
      if( fossil_strnicmp("journal", &zEnd[-7], 7) ) return 0;
      gotSuffix = 8;
    }
    if( gotSuffix ){
      assert( 4==gotSuffix || 8==gotSuffix );
      zEnd -= gotSuffix;
      nFilename -= gotSuffix;
      gotSuffix = 1;
    }
    assert( nFilename>=8 && "strlen(_FOSSIL_)" );
    assert( gotSuffix==0 || gotSuffix==1 );
  }
  switch( zEnd[-1] ){
    case '_':{
      if( fossil_strnicmp("_FOSSIL_", &zEnd[-8], 8) ) return 0;
      if( 8==nFilename ) return 1;
      return zEnd[-9]=='/' ? 2 : gotSuffix;
    }
    case 'T':
    case 't':{
      if( nFilename<9 || zEnd[-9]!='.'
       || fossil_strnicmp(".fslckout", &zEnd[-9], 9) ){
        return 0; 
      }
      if( 9==nFilename ) return 1;
      return zEnd[-10]=='/' ? 2 : gotSuffix;
    }
    default:{
      return 0;
    }
  }
}

/*
** COMMAND: test-is-reserved-name
**
** Usage: %fossil test-is-ckout-db FILENAMES...
**
** Passes each given name to file_is_reserved_name() and outputs one
** line per file: the result value of that function followed by the
** name.
*/
void test_is_reserved_name_cmd(void){
  int i;

  if(g.argc<3){
    usage("FILENAME_1 [...FILENAME_N]");
  }
  for( i = 2; i < g.argc; ++i ){
    const int check = file_is_reserved_name(g.argv[i], -1);
    fossil_print("%d %s\n", check, g.argv[i]);
  }
}

      j = strlen(zLine) - 1;
      while( j>4 && fossil_strcmp(&zLine[j-4],"/xfer")==0 ){
         j -= 4;
         zLine[j] = 0;
      }
      if( (mHttpFlags & HTTP_QUIET)==0 ){
        fossil_print("redirect with status %d to %s\n", rc, &zLine[i]);
      }
      if( g.url.isFile || g.url.isSsh ){
        fossil_warning("cannot redirect from %s to %s", g.url.canonical,
                       &zLine[i]);
        goto write_err;
      }
      wasHttps = g.url.isHttps;
      url_parse(&zLine[i], 0);
      if( wasHttps && !g.url.isHttps ){
        fossil_warning("cannot redirect from HTTPS to HTTP");
        goto write_err;
      }
      if( g.url.isSsh || g.url.isFile ){
        fossil_warning("cannot redirect to %s", &zLine[i]);
        goto write_err;
      }
      transport_close(&g.url);
      transport_global_shutdown(&g.url);
      fSeenHttpAuth = 0;
      if( g.zHttpAuth ) free(g.zHttpAuth);
      g.zHttpAuth = get_httpauth();
      if( rc==301 || rc==308 ) url_remember();
      return http_exchange(pSend, pReply, mHttpFlags,

  if( n<10 || z[0]<'A' || z[0]>'Z' || z[1]!=' ' ){
    blob_reset(pContent);
    blob_appendf(pErr, "line 1 not recognized");
    return 0;
  }
  /* Then verify the Z-card.
  */
#if 1
  /* Disable this ***ONLY*** (ONLY!) when testing hand-written inputs
     for card-related syntax errors. */
  if( verify_z_card(z, n, pErr)==2 ){
    blob_reset(pContent);
    return 0;
  }
#else
#warning ACHTUNG - z-card check is disabled for testing purposes.
  if(0 && verify_z_card(NULL, 0, NULL)){
    /*avoid unused static func error*/
  }
#endif

  /* Allocate a Manifest object to hold the parsed control artifact.
  */
  p = fossil_malloc( sizeof(*p) );
  memset(p, 0, sizeof(*p));
  memcpy(&p->content, pContent, sizeof(p->content));
  p->rid = rid;

      ** is when the specific event is said to occur.
      */
      case 'E': {
        if( p->rEventDate>0.0 ) SYNTAX("more than one E-card");
        p->rEventDate = db_double(0.0,"SELECT julianday(%Q)", next_token(&x,0));
        if( p->rEventDate<=0.0 ) SYNTAX("malformed date on E-card");
        p->zEventId = next_token(&x, &sz);
        if( p->zEventId==0 ) SYNTAX("missing hash on E-card");
        if( !hname_validate(p->zEventId, sz) ){
          SYNTAX("malformed hash on E-card");
        }
        p->type = CFTYPE_EVENT;
        break;
      }

        if( zName==0 ) SYNTAX("missing filename on F-card");
        defossilize(zName);
        if( !file_is_simple_pathname_nonstrict(zName) ){
          SYNTAX("F-card filename is not a simple path");
        }
        zUuid = next_token(&x, &sz);
        if( p->zBaseline==0 || zUuid!=0 ){
          if( zUuid==0 ) SYNTAX("missing hash on F-card");
          if( !hname_validate(zUuid,sz) ){
            SYNTAX("F-card hash invalid");
          }
        }
        zPerm = next_token(&x,0);
        zPriorName = next_token(&x,0);
        if( zPriorName ){
          defossilize(zPriorName);
          if( !file_is_simple_pathname_nonstrict(zPriorName) ){
            SYNTAX("F-card old filename is not a simple path");
          }
        }
        if( p->nFile>=p->nFileAlloc ){
          p->nFileAlloc = p->nFileAlloc*2 + 10;
          p->aFile = fossil_realloc(p->aFile,
                                    p->nFileAlloc*sizeof(p->aFile[0]) );
        }
        i = p->nFile++;
        if( i>0 && fossil_strcmp(p->aFile[i-1].zName, zName)>=0 ){
          SYNTAX("incorrect F-card sort order");
        }
        if( file_is_reserved_name(zName,-1) ){
          /* If reserved names leaked into historical manifests due to
          ** slack oversight by older versions of Fossil, simply ignore
          ** those files */
          p->nFile--;
          break;
        }
        p->aFile[i].zName = zName;
        p->aFile[i].zUuid = zUuid;
        p->aFile[i].zPerm = zPerm;
        p->aFile[i].zPrior = zPriorName;



        p->type = CFTYPE_MANIFEST;
        break;
      }

      /*
      **    G <hash>
      **

  return rc;
}

/*
** Activate the query authorizer
*/
void report_restrict_sql(char **pzErr){
  db_set_authorizer(report_query_authorizer,(void*)pzErr,"Ticket-Report");
  sqlite3_limit(g.db, SQLITE_LIMIT_VDBE_OP, 10000);
}
void report_unrestrict_sql(void){
  db_clear_authorizer();
}


/*
** Check the given SQL to see if is a valid query that does not
** attempt to do anything dangerous.  Return 0 on success and a
** pointer to an error message string (obtained from malloc) if

  /* Do initialization
  */
  if( pState->nCount==0 ){
    /* Turn off the authorizer.  It is no longer doing anything since the
    ** query has already been prepared.
    */
    db_clear_authorizer();

    /* Figure out the number of columns, the column that determines background
    ** color, and whether or not this row of data is represented by multiple
    ** rows in the table.
    */
    pState->nCol = 0;
    pState->isMultirow = 0;

int ticket_change(const char *zUuid){
  const char *zConfig;
  Th_FossilInit(TH_INIT_DEFAULT);
  Th_Store("uuid", zUuid);
  zConfig = ticket_change_code();
  return Th_Eval(g.interp, 0, zConfig, -1);
}

/*
** An authorizer function for the SQL used to initialize the
** schema for the ticketing system.  Only allow CREATE TABLE and
** CREATE INDEX for tables whose names begin with "ticket" and
** changes to tables whose names begin with "ticket".
*/
static int ticket_schema_auth(
  void *pNErr,
  int eCode,
  const char *z0,
  const char *z1,
  const char *z2,
  const char *z3
){
  switch( eCode ){
    case SQLITE_CREATE_TABLE: {
      if( sqlite3_stricmp(z2,"main")!=0
       && sqlite3_stricmp(z2,"repository")!=0
      ){
        goto ticket_schema_error;
      }
      if( sqlite3_strnicmp(z0,"ticket",6)!=0 ){
        goto ticket_schema_error;
      }
      break;
    }
    case SQLITE_CREATE_INDEX: {
      if( sqlite3_stricmp(z2,"main")!=0
       && sqlite3_stricmp(z2,"repository")!=0
      ){
        goto ticket_schema_error;
      }
      if( sqlite3_strnicmp(z1,"ticket",6)!=0 ){
        goto ticket_schema_error;
      }
      break;
    }
    case SQLITE_INSERT:
    case SQLITE_UPDATE:
    case SQLITE_DELETE: {
      if( sqlite3_stricmp(z2,"main")!=0
       && sqlite3_stricmp(z2,"repository")!=0
      ){
        goto ticket_schema_error;
      }
      if( sqlite3_strnicmp(z0,"ticket",6)!=0
       && sqlite3_strnicmp(z0,"sqlite_",7)!=0
      ){
        goto ticket_schema_error;
      }
      break;
    }
    case SQLITE_REINDEX:
    case SQLITE_TRANSACTION:
    case SQLITE_READ: {
      break;
    }
    default: {
      goto ticket_schema_error;
    }
  }
  return SQLITE_OK;

ticket_schema_error:
  if( pNErr ) *(int*)pNErr  = 1;
  return SQLITE_DENY;
}


/*
** Recreate the TICKET and TICKETCHNG tables.
*/
void ticket_create_table(int separateConnection){
  char *zSql;

  db_multi_exec(
    "DROP TABLE IF EXISTS ticket;"
    "DROP TABLE IF EXISTS ticketchng;"
  );
  zSql = ticket_table_schema();
  if( separateConnection ){
    if( db_transaction_nesting_depth() ) db_end_transaction(0);
    db_set_authorizer(ticket_schema_auth,0,"Ticket-Schema");
    db_init_database(g.zRepositoryName, zSql, 0);
  }else{
    db_set_authorizer(ticket_schema_auth,0,"Ticket-Schema");
    db_multi_exec("%s", zSql/*safe-for-%s*/);
  }
  db_clear_authorizer();
  fossil_free(zSql);
}

/*
** Repopulate the TICKET and TICKETCHNG tables from scratch using all
** available ticket artifacts.
*/

struct UrlData {
  int isFile;      /* True if a "file:" url */
  int isHttps;     /* True if a "https:" url */
  int isSsh;       /* True if an "ssh:" url */
  int isAlias;     /* Input URL was an alias */
  char *name;      /* Hostname for http: or filename for file: */
  char *hostname;  /* The HOST: parameter on http headers */
  const char *protocol; /* "http" or "https" or "ssh" or "file" */
  int port;        /* TCP port number for http: or https: */
  int dfltPort;    /* The default port for the given protocol */
  char *path;      /* Pathname for http: */
  char *user;      /* User id for http: */
  char *passwd;    /* Password for http: */
  char *canonical; /* Canonical representation of the URL */
  char *proxyAuth; /* Proxy-Authorizer: string */

** last-sync-url setting using last-sync-pw as the password.  Store
** the parser results in the pUrlData object.  Populate members of pUrlData
** as follows:
**
**      isFile      True if FILE:
**      isHttps     True if HTTPS:
**      isSsh       True if SSH:
**      protocol    "http" or "https" or "file" or "ssh"
**      name        Hostname for HTTP:, HTTPS:, SSH:.  Filename for FILE:
**      port        TCP port number for HTTP or HTTPS.
**      dfltPort    Default TCP port number (80 or 443).
**      path        Path name for HTTP or HTTPS.
**      user        Userid.
**      passwd      Password.
**      hostname    HOST:PORT or just HOST if port is the default.

** in the global "g.url" structure as shown below.  If zUrl is NULL, then
** parse the URL given in the last-sync-url setting, taking the password
** form last-sync-pw.
**
**      g.url.isFile      True if FILE:
**      g.url.isHttps     True if HTTPS:
**      g.url.isSsh       True if SSH:
**      g.url.protocol    "http" or "https" or "file" or "ssh"
**      g.url.name        Hostname for HTTP:, HTTPS:, SSH:.  Filename for FILE:
**      g.url.port        TCP port number for HTTP or HTTPS.
**      g.url.dfltPort    Default TCP port number (80 or 443).
**      g.url.path        Path name for HTTP or HTTPS.
**      g.url.user        Userid.
**      g.url.passwd      Password.
**      g.url.hostname    HOST:PORT or just HOST if port is the default.

                   "  FROM vfile"
                   " WHERE id=%d AND mrid>0",
                   g.zLocalRoot, id);
  }
  while( db_step(&q)==SQLITE_ROW ){
    int id, rid, isExe, isLink;
    const char *zName;
    int n;

    id = db_column_int(&q, 0);
    zName = db_column_text(&q, 1);
    rid = db_column_int(&q, 2);
    isExe = db_column_int(&q, 3);
    isLink = db_column_int(&q, 4);
    content_get(rid, &content);

        promptFlag = 0;
      } else if( cReply!='y' && cReply!='Y' ){
        blob_reset(&content);
        continue;
      }
    }
    if( verbose ) fossil_print("%s\n", &zName[nRepos]);
    n = file_nondir_objects_on_path(g.zLocalRoot, zName);
    if( n ){
      fossil_fatal("cannot write %s because "
                   "non-directory object %.*s is in the way",
                   zName, n, zName);
    }
    if( file_isdir(zName, RepoFILE)==1 ){
      /*TODO(dchest): remove directories? */
      fossil_fatal("%s is directory, cannot overwrite", zName);
    }
    if( file_size(zName, RepoFILE)>=0 && (isLink || file_islink(0)) ){
      file_delete(zName);
    }