info

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



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

SYNOPSIS
       info option ?arg arg ...?
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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 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
              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 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
              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.  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 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, 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



Tcl                                   7.5                              info(n)