info(3Tcl)

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 procedure
          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, 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.

     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 multiple 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.  Otherwise it returns 1
          and places the default value of arg into variable varname.

     info exists varName
          Returns 1 if the variable named varName exists in the current
          context (either as a global or local variable), returns 0 otherwise.

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

     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 positive 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 levels 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 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 specified, only
          those names matching pattern are returned.  Matching is determined
          using the same rules as for string match.

     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.  If pattern is specified, only those names
          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 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, including both locals and currently-
          visible globals.  If pattern is specified, only those names matching
          pattern are returned.  Matching is determined using the same rules
          as for string match.


KEYWORDS
     command, information, interpreter, level, procedure, variable