[Tclx] documents infox the following way:

     infox option

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

         version
               Return the version number of Extended Tcl. The version
               number for Extended Tcl is generated by combining the
               base version of the standard Tcl code with another number
               indicating the version of Extended Tcl being used.

          patchlevel
               Return the patchlevel for Extended Tcl.

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

          have_fchmod
               Return 1 if the fchmod system call is available. 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 available and the
               sync command will sync individual 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 available, 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 available (-restart
               option available for the signal 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 variable.

          applongname
               Return a natural language name for the current
               application. The C variable tclLongAppName 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 variable.

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






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[Category Command], a part of [Tclx]