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'\"
'\" Copyright (c) 1991-1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
'\" RCS: @(#) $Id: library.n,v 1.1.2.2 1998/11/11 04:08:14 stanton Exp $
.so man.macros
.TH library n "8.0" Tcl "Tcl Built-In Commands"
.BS
.SH NAME
library \- standard library of Tcl procedures
.SH SYNOPSIS
.nf
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'\"
'\" Copyright (c) 1991-1993 The Regents of the University of California.
'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
'\"
'\" See the file "license.terms" for information on usage and redistribution
'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
'\"
'\" RCS: @(#) $Id: library.n,v 1.1.2.3 1999/04/09 21:01:30 surles Exp $
.so man.macros
.TH library n "8.0" Tcl "Tcl Built-In Commands"
.BS
.SH NAME
library \- standard library of Tcl procedures
.SH SYNOPSIS
.nf
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the auto-load mechanism defined below.
.SH "COMMAND PROCEDURES"
.PP
The following procedures are provided in the Tcl library:
.TP
\fBauto_execok \fIcmd\fR
Determines whether there is an executable file by the name \fIcmd\fR.
This command examines the directories in the current search path
(given by the PATH environment variable) to see if there is an
executable file named \fIcmd\fR in any of those directories.
If so, it returns 1; if not it returns 0. \fBAuto_exec\fR
remembers information about previous searches in an array
named \fBauto_execs\fR; this avoids the path search in
future calls for the same \fIcmd\fR. The command \fBauto_reset\fR
may be used to force \fBauto_execok\fR to forget its cached
information.
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the auto-load mechanism defined below.
.SH "COMMAND PROCEDURES"
.PP
The following procedures are provided in the Tcl library:
.TP
\fBauto_execok \fIcmd\fR
Determines whether there is an executable file or shell builtin
by the name \fIcmd\fR. If so, it returns a list of arguments to be
passed to \fBexec\fR to execute the executable file or shell builtin
named by \fIcmd\fR. If not, it returns an empty string. This command
examines the directories in the current search path (given by the PATH
environment variable) in its search for an executable file named
\fIcmd\fR. On Windows platforms, the search is expanded with the same
directories and file extensions as used by \fBexec\fR. \fBAuto_exec\fR
remembers information about previous searches in an array named
\fBauto_execs\fR; this avoids the path search in future calls for the
same \fIcmd\fR. The command \fBauto_reset\fR may be used to force
\fBauto_execok\fR to forget its cached information.
.TP
\fBauto_load \fIcmd\fR
This command attempts to load the definition for a Tcl command named
\fIcmd\fR.
To do this, it searches an \fIauto-load path\fR, which is a list of
one or more directories.
The auto-load path is given by the global variable \fB$auto_path\fR
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