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 in the current namespace context, 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 pat_tern 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 context
Returns the fully-qualified name for the current namespace context. The global namespace ("::") is represented as a null string, making it easy to build namespace names like "[info context]::foo".
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 in the current namespace context. 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 staticallyloaded 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 namespace option ?arg arg ...?
A collection of queries regarding namespaces. The option argument should be one of the following:
info namespace all ?pattern?
Returns a list of all child namespaces in the current namespace context. This includes the direct children of the current namespace and other children that are visible because their parent namespace was imported. The direct children have simple names and appear first on the list; the imported children have fully-qualified names and appear at the end of the list.
info namespace children ?name?
Returns a list of all child namespaces in the namespace name. If name is not specified, then children are reported in the current namespace context. Unlike the "info namespace all" command, this command reports only the children directly contained within the namespace, and it reports them with fully-qualified names.
info namespace parent ?name?
Returns the fully-qualified name of the parent for namespace name. If name is not specified, then the parent of the current namespace context is reported.
info namespace qualifiers string
Returns the leading namespace qualifiers for the specified string. Qualifiers are namespace names separated by the "::" string. For the string "::foo::bar::x", this command would return "::foo::bar".
info namespace tail string
Returns the simple name at the end of qualified string. Qualifiers are namespace names separated by the "::" string. For the string "::foo::bar::x", this command would return "x".
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 context. If pattern is specified, only those names matching pattern are returned. Matching is determined using the same rules as for string match.
info protection ?-command? ?-variable? name Returns the current protection level (public, protected or private) for the specified name. The protection level is set using the public, protected and private commands when a command or variable is created. The protection level indicates whether or not a command or variable can be accessed from other namespace contexts. See the documentation on namespace for the rules regarding command/variable access. If no flags speci- fied, or if the -command flag is included, name is treated as a command name. If the -variable flag is included, name is treated as a variable name.
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.
info which ?-command? ?-variable? ?-namespace? name Resolves the specified name in the current namespace context and returns a fully-qualified name which uniquely identifies it. See the documentation on namespace for the rules regarding name resolution. If no flags specified, or if the -command flag is included, name is treated as a command name. If the -variable flag is included, name is treated as a vari- able name. If the -namespace flag is included, name is treated as a namespace name.
KEYWORDS
command, information, interpreter, level, procedure, variable