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 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. Interp defaults to the current interpreter.
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 
Copyright © 1993 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.
Copyright © 1995, 1996 Roger E. Critchlow Jr.