Fossil

/*
** SSH initialization of the transport layer
*/
int transport_ssh_open(void){
  /* For SSH we need to create and run SSH fossil http 
  ** to talk to the remote machine.
  */
  static int fPrintSshCmd = 1;  /* Print SSH command only once */
  const char *zSsh;  /* The base SSH command */
  Blob zCmd;         /* The SSH command */
  char *zHost;       /* The host name to contact */
  int n;             /* Size of prefix string */

  socket_ssh_resolve_addr();
  zSsh = db_get("ssh-command", zDefaultSshCmd);
  blob_init(&zCmd, zSsh, -1);
  if( g.urlPort!=g.urlDfltPort && g.urlPort ){
#ifdef __MINGW32__
    blob_appendf(&zCmd, " -P %d", g.urlPort);
#else
    blob_appendf(&zCmd, " -p %d", g.urlPort);
#endif
  }
  if( fPrintSshCmd ){
  if( g.fSshTrace ){
    fossil_force_newline();
    fossil_print("%s", blob_str(&zCmd));  /* Show the base of the SSH command */
  }
  if( g.urlUser && g.urlUser[0] ){
    zHost = mprintf("%s@%s", g.urlUser, g.urlName);
  }else{
    zHost = mprintf("%s", g.urlName);
  }
  n = blob_size(&zCmd);
  blob_append(&zCmd, " ", 1);
  shell_escape(&zCmd, zHost);
  blob_append(&zCmd, " ", 1);
  shell_escape(&zCmd, mprintf("%s", g.urlFossil));
  blob_append(&zCmd, " test-http", 10);
  if( g.urlPath && g.urlPath[0] ){
    blob_append(&zCmd, " ", 1);
    shell_escape(&zCmd, mprintf("%s", g.urlPath));
  }
  if( fPrintSshCmd ){
  if( g.fSshTrace ){
    fossil_print("%s\n", blob_str(&zCmd)+n);  /* Show tail of SSH command */
    fPrintSshCmd = 0;
  }
  free(zHost);
  popen2(blob_str(&zCmd), &sshIn, &sshOut, &sshPid);
  if( sshPid==0 ){
    socket_set_errmsg("cannot start ssh tunnel using [%b]", &zCmd);
  }
  blob_reset(&zCmd);