       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.

       This command is provided by Extended Tcl.
