diff options
| -rw-r--r-- | doc/unknown.n | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/doc/unknown.n b/doc/unknown.n index 2ef5b14..95bb066 100644 --- a/doc/unknown.n +++ b/doc/unknown.n @@ -5,7 +5,7 @@ '\" See the file "license.terms" for information on usage and redistribution '\" of this file, and for a DISCLAIMER OF ALL WARRANTIES. '\" -'\" RCS: @(#) $Id: unknown.n,v 1.4 2001/06/27 21:00:45 hobbs Exp $ +'\" RCS: @(#) $Id: unknown.n,v 1.5 2004/05/30 14:13:52 dkf Exp $ '\" .so man.macros .TH unknown n "" Tcl "Tcl Built-In Commands" @@ -71,6 +71,20 @@ auto-exec step is skipped. Under normal circumstances the return value from \fBunknown\fR is the return value from the command that was eventually executed. +.SH EXAMPLE +Arrange for the \fBunknown\fR command to have its standard behavior +except for first logging the fact that a command was not found: +.PP +.CS +# Save the original one so we can chain to it +rename \fBunknown\fR _original_unknown + +# Provide our own implementation +proc \fBunknown\fR args { + puts stderr "WARNING: unknown command: $args" + uplevel 1 [list _original_unknown {expand}$args] +} +.CE .SH "SEE ALSO" info(n), proc(n), interp(n), library(n) |