       infox option

              Return  information about Extended Tcl, or the cur
              rent  application.   The  following  infox  command
              options are available:

              version
                     Return  the  version number of Extended Tcl.
                     The version number for Extended Tcl is  gen
                     erated  by combining the base version of the
                     standard Tcl code with another number  indi
                     cating  the  version  of  Extended Tcl being
                     used.

              patchlevel
                     Return the patchlevel for Extended Tcl.

              have_fchown
                     Return 1 if the fchown system call is avail
                     able.   This  supports the -fileid option on
                     the chown and chgrp commands.

              have_fchmod
                     Return 1 if the fchmod system call is avail
                     able.   This  supports the -fileid option on
                     the chmod command.

              have_flock
                     Return 1 if the flock command defined,  0 if
                     it is not available.

              have_fsync
                     Return  1 if the fsync system call is avail
                     able and the sync command will sync individ
                     ual files.  0 if it is not available and the
                     sync  command  will  always  sync  all  file
                     buffers.

              have_ftruncate
                     Return  1  if the ftruncate or chsize system
                     call is available.  If it is, the  ftruncate
                     command -fileid option maybe used.

              have_msgcats
                     Return  1 if XPG message catalogs are avail
                     able, 0 if they are  not.   The  catgets  is
                     designed  to  continue  to  function without
                     message  catalogs,  always   returning   the
                     default string.

              have_posix_signals
                     Return  1  if  Posix  signals  are available
                     (block and unblock options available for the
                     signal  command).   0  is  returned if Posix
                     signals are not available.

              have_signal_restart
                     Return 1 if restartable signals  are  avail
                     able (-restart option available for the sig
                     nal command).  0 is returned if  restartable
                     signals are not available.

              have_truncate
                     Return  1  if  the  truncate  system call is
                     available.  If it is, the ftruncate  command
                     may truncate by file path.

              have_waitpid
                     Return  1  if  the  waitpid  system  call is
                     available and  the  wait  command  has  full
                     functionality.   0  if  the wait command has
                     limited functionality.

              appname
                     Return the symbolic application name of  the
                     current application linked with the Extended
                     Tcl library.  The C variable tclAppName must
                     be  set  by  the  application  to  return an
                     application specific value  for  this  vari
                     able.

              applongname
                     Return  a natural language name for the cur
                     rent application. The C variable tclLongApp
                     Name  must  be  set  by  the  application to
                     return an  application  specific  value  for
                     this variable.

              appversion
                     Return  the  version  number for the current
                     application.  The C  variable  tclAppVersion
                     must  be set by the application to return an
                     application-specific value  for  this  vari
                     able.

              apppatchlevel
                     Return the patchlevel for the current appli
                     cation.   The  C  variable  tclAppPatchlevel
                     must  be set by the application to return an
                     application-specific value  for  this  vari
                     able.
