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info(n)			     Tcl Built-In Commands		       info(n)

______________________________________________________________________________

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 functions ?pattern?						       │
	      If pattern isn't specified, returns a list of all the math func‐ │
	      tions  currently	defined.   If pattern is specified, only those │
	      functions whose name matches pattern are returned.  Matching  is │
	      determined using the same rules as for string match.

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

       info hostname
	      Returns  the  name  of  the computer on which this invocation is
	      being executed.  Note that this name is not guaranteed to be the │
	      fully  qualified	domain	name of the host.  Where machines have │
	      several different names (as  is  common  on  systems  with  both │
	      TCP/IP  (DNS) and NetBIOS-based networking installed,) it is the │
	      name that is suitable for TCP/IP networking that is returned.

       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,
	      upvar  and variable commands will not be returned.   If  pattern
	      is  specified,  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 ?filename?
	      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.  If filename	is  specified,
	      then  the	 return value of this command will be modified for the
	      duration of the active invocation to return that name.  This  is
	      useful  in virtual file system applications.  Otherwise the com‐
	      mand 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.

SEE ALSO
       global(n), proc(n)

KEYWORDS
       command,	 information,  interpreter, level, namespace, procedure, vari‐
       able

Tcl				      8.4			       info(n)
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