NAME
       info - Return information about the state of the Tcl interpreter

SYNOPSIS
       info option ?arg arg ...?


DESCRIPTION
       This  command  provides  information about various internals of the Tcl
       interpreter.  The legal option's (which may be abbreviated) are:

       info args procname
              Returns a list containing the names of the arguments  to  proce-
              dure  procname,  in  order.   Procname must be the name of a Tcl
              command procedure.

       info body procname
              Returns the body of procedure procname.  Procname  must  be  the
              name of a Tcl command procedure.

       info cmdcount
              Returns  a  count of the total number of commands that have been
              invoked in this interpreter.

       info commands ?pattern?
              If pattern isn't specified, returns a list of names of  all  the
              Tcl commands in the current namespace, including both the built-
              in commands written in C  and  the  command  procedures  defined
              using  the  proc  command.   If pattern is specified, only those
              names matching pattern are  returned.   Matching  is  determined
              using  the  same  rules  as  for string match.  pattern can be a
              qualified name like Foo::print*.  That is, it may specify a par-
              ticular  namespace using a sequence of namespace names separated
              by ::s, and may have pattern matching special characters at  the
              end  to specify a set of commands in that namespace.  If pattern
              is a qualified name, the resulting list  of  command  names  has
              each one qualified with the name of the specified namespace.

       info complete command
              Returns  1  if command is a complete Tcl command in the sense of
              having no unclosed quotes, braces,  brackets  or  array  element
              names,  If  the  command doesn't appear to be complete then 0 is
              returned.  This command is typically used in line-oriented input
              environments to allow users to type in commands that span multi-
              ple lines;  if the command isn't complete, the script can  delay
              evaluating it until additional lines have been typed to complete
              the command.

       info default procname arg varname
              Procname must be the name of a Tcl  command  procedure  and  arg
              must  be  the  name  of  an  argument to that procedure.  If arg
              doesn't have a default value then the command returns 0.  Other-
              wise it returns 1 and places the default value of arg into vari-
              able varname.

       info exists varName
              Returns 1 if the variable named varName exists  in  the  current
              context  (either  as  a  global  or local variable) and has been
              defined by being given a value, returns 0 otherwise.

       info globals ?pattern?
              If pattern isn't specified, returns a list of all the  names  of
              currently-defined   global   variables.   Global  variables  are
              variables in the global namespace.   If  pattern  is  specified,
              only  those  names  matching  pattern are returned.  Matching is
              determined using the same rules as for string match.

       info hostname
              Returns the name of the computer on  which  this  invocation  is
              being executed.

       info level ?number?
              If number is not specified, this command returns a number giving
              the stack level of the invoking procedure, or 0 if  the  command
              is  invoked  at  top-level.   If  number  is specified, then the
              result is a list consisting of the name and  arguments  for  the
              procedure call at level number on the stack.  If number is posi-
              tive then it selects a particular stack level (1 refers  to  the
              top-most  active procedure, 2 to the procedure it called, and so
              on); otherwise it gives a level relative to the current level (0
              refers  to  the current procedure, -1 to its caller, and so on).
              See the uplevel command for more information on what stack  lev-
              els mean.

       info library
              Returns  the name of the library directory in which standard Tcl
              scripts  are  stored.   This  is  actually  the  value  of   the
              tcl_library  variable and may be changed by setting tcl_library.
              See the tclvars manual entry for more information.

       info loaded ?interp?
              Returns a list describing all of the  packages  that  have  been
              loaded  into interp with the load command.  Each list element is
              a sub-list with two elements consisting of the name of the  file
              from  which  the package was loaded and the name of the package.
              For statically-loaded packages the file name will  be  an  empty
              string.   If  interp is omitted then information is returned for
              all packages loaded in any interpreter in the process.  To get a
              list of just the packages in the current interpreter, specify an
              empty string for the interp argument.

       info locals ?pattern?
              If pattern isn't specified, returns a list of all the  names  of
              currently-defined  local  variables,  including arguments to the
              current procedure, if any.  Variables defined  with  the  global
              and  upvar  commands will not be returned.  If pattern is speci-
              fied, only those names matching pattern are returned.   Matching
              is determined using the same rules as for string match.

       info nameofexecutable
              Returns  the  full  path  name of the binary file from which the
              application was invoked.  If Tcl  was  unable  to  identify  the
              file, then an empty string is returned.

       info patchlevel
              Returns the value of the global variable tcl_patchLevel; see the
              tclvars manual entry for more information.

       info procs ?pattern?
              If pattern isn't specified, returns a list of all the  names  of
              Tcl  command procedures in the current namespace.  If pattern is
              specified, only those procedure names in the  current  namespace
              matching pattern are returned.  Matching is determined using the
              same rules as for string match.

       info script
              If a Tcl script file is currently being evaluated (i.e. there is
              a  call  to Tcl_EvalFile active or there is an active invocation
              of the source command), then this command returns  the  name  of
              the  innermost  file  being  processed.   Otherwise  the command
              returns an empty string.

       info sharedlibextension
              Returns the extension used on this platform  for  the  names  of
              files  containing  shared  libraries  (for  example,  .so  under
              Solaris).  If shared libraries aren't supported on this platform
              then an empty string is returned.

       info tclversion
              Returns  the  value  of the global variable tcl_version; see the
              tclvars manual entry for more information.

       info vars ?pattern?
              If pattern isn't specified, returns a list of all the  names  of
              currently-visible  variables.   This  includes  locals  and cur-
              rently-visible globals.  If pattern  is  specified,  only  those
              names  matching  pattern  are  returned.  Matching is determined
              using the same rules as for string  match.   pattern  can  be  a
              qualified  name  like  Foo::option*.   That is, it may specify a
              particular namespace using a sequence of namespace  names  sepa-
              rated  by  ::s, and may have pattern matching special characters
              at the end to specify a set of variables in that namespace.   If
              pattern  is  a  qualified  name,  the resulting list of variable
              names has each matching namespace variable  qualified  with  the
              name of its namespace.


KEYWORDS
       command,  information,  interpreter, level, namespace, procedure, vari-
