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 a letter indicating the version of Extended Tcl being used. This is the documentation for version 7.4a. 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_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.