I am currently working overseas for a 48-node grid cluster installation and one of the applications installation requires to be done interactively. It would be a pain in the ass to do that 48 times, right?
In the Expect (a
Tcl tool/extension for automating interactive applications) source tarball, there is an example called "multixterm" which allow the user to send a single input to multiple terminals. Since all the 48 nodes are able to be ssh in from the grid master without password, I was able to launch multixterm to do my installation interactively.
Here is a sample screen dump example that I used to launch 4 xterms in the localhost.
In case you would like to see who the multixterm works, I am copying the original expect source here.
Here
is a good example showing you how to install and launch
Expect in Debian Linux.
#!/depot/path/expectk
#
# NAME
# multixterm - drive multiple xterms separately or together
#
# SYNOPSIS
# multixterm [-xa "xterm args"]
# [-xc "command"]
# [-xd "directory"]
# [-xf "file"]
# [-xn "xterm names"]
# [-xv] (enable verbose mode)
# [-xh] or [-x?] (help)
# [xterm names or user-defined args...]
#
# DESCRIPTION
# Multixterm creates multiple xterms that can be driven together
# or separately.
#
# In its simplest form, multixterm is run with no arguments and
# commands are interactively entered in the first entry field.
# Press return (or click the "new xterm" button) to create a new
# xterm running that command.
#
# Keystrokes in the "stdin window" are redirected to all xterms
# started by multixterm. xterms may be driven separately simply
# by focusing on them.
#
# The stdin window must have the focus for keystrokes to be sent
# to the xterms. When it has the focus, the color changes to
# aquamarine. As characters are entered, the color changes to
# green for a second. This provides feedback since characters
# are not echoed in the stdin window.
#
# Typing in the stdin window while holding down the alt or meta
# keys sends an escape character before the typed characters.
# This provides support for programs such as emacs.
#
# ARGUMENTS
# The optional -xa argument indicates arguments to pass to
# xterm.
#
# The optional -xc argument indicates a command to be run in
# each named xterm (see -xn). With no -xc argument, the command
# is the current shell.
#
# The optional -xd argument indicates a directory to search for
# files that will appear in the Files menu. By default, the
# directory is: ~/lib/multixterm
#
# The optional -xf argument indicates a file to be read at
# startup. See FILES below for more info.
#
# The optional -xn argument indicates a name for each xterm.
# This name will also be substituted for any %n in the command
# argument (see -xc).
#
# The optional -xv flag puts multixterm into a verbose mode
# where it will describe some of the things it is doing
# internally. The verbose output is not intended to be
# understandable to anyone but the author.
#
# Less common options may be changed by the startup file (see
# FILES below).
#
# All the usual X and wish flags are supported (i.e., -display,
# -name). There are so many of them that to avoid colliding and
# make them easy to remember, all the multixterm flags begin
# with -x.
#
# If any arguments do not match the flags above, the remainder
# of the command line is made available for user processing. By
# default, the remainder is used as a list of xterm names in the
# style of -xn. The default behavior may be changed using the
# .multixtermrc file (see DOT FILE below).
#
# EXAMPLE COMMAND LINE ARGUMENTS
# The following command line starts up two xterms using ssh to
# the hosts bud and dexter.
#
# multixterm -xc "ssh %n" bud dexter
#
# FILES
# Command files may be used to drive or initialize multixterm.
# The File menu may be used to invoke other files. If files
# exist in the command file directory (see -xd above), they will
# appear in the File menu. Files may also be loaded by using
# File->Open. Any filename is acceptable but the File->Open
# browser defaults to files with a .mxt suffix.
#
# Files are written in Tcl and may change any variables or
# invoke any procedures. The primary variables of interest are
# 'xtermCmd' which identifies the command (see -xc) and
# 'xtermNames' which is a list of names (see -xn). The
# procedure xtermStartAll, starts xterms for each name in the
# list. Other variables and procedures may be discovered by
# examining multixterm itself.
#
# EXAMPLE FILE
# The following file does the same thing as the earlier example
# command line:
#
# # start two xterms connected to bud and dexter
# set xtermCmd "ssh %n"
# set xtermNames {bud dexter}
# xtermStartAll
#
# DOT FILE
# At startup, multixterm reads ~/.multixtermrc if present. This
# is similar to the command files (see FILES above) except that
# .multixtermrc may not call xtermStartAll. Instead it is
# called implicitly, similar to the way that it is implicit in
# the command line use of -xn.
#
# The following example .multixtermrc file makes every xterm run
# ssh to the hosts named on the command line.
#
# set xtermCmd "ssh %n"
#
# Then multixterm could be called simply:
#
# multixterm bud dexter
#
# If any command-line argument does not match a multixterm flag,
# the remainder of the command line is made available to
# .multixtermrc in the argv variable. If argv is non-empty when
# .multixtermrc returns, it is assigned to xtermNames unless
# xtermNames is non-empty in which case, the content of argv is
# ignored.
#
# Commands from .multixtermrc are evaluated early in the
# initialization of multixterm. Anything that must be done late
# in the initialization (such as adding additional bindings to
# the user interface) may be done by putting the commands inside
# a procedure called "initLate".
#
# MENUS
# Except as otherwise noted, the menus are self-explanatory.
# Some of the menus have dashed lines as the first entry.
# Clicking on the dashed lines will "tear off" the menus.
#
# USAGE SUGGESTION - ALIASES AND COMMAND FILES
# Aliases may be used to store lengthy command-line invocations.
# Command files can be also be used to store such invocations
# as well as providing a convenient way to share configurations.
#
# Tcl is a general-purpose language. Thus multixterm command
# files can be extremely flexible, such as loading hostnames
# from other programs or files that may change from day-to-day.
# In addition, command files can be used for other purposes.
# For example, command files may be used to prepared common
# canned interaction sequences. For example, the command to
# send the same string to all xterms is:
#
# xtermSend "a particularly long string"
#
# The File menu (torn-off) makes canned sequences particularly
# convenient. Interactions could also be bound to a mouse
# button, keystroke, or added to a menu via the .multixtermrc
# file.
#
# USAGE SUGGESTION - HANDLING MANY XTERMS BY TILING
# The following .multixtermrc causes tiny xterms to tile across
# and down the screen. (You may have to adjust the parameters
# for your screen.) This can be very helpful when dealing with
# large numbers of xterms.
#
# set yPos 0
# set xPos 0
#
# trace variable xtermArgs r traceArgs
#
# proc traceArgs {args} {
# global xPos yPos
# set ::xtermArgs "-geometry 80x12+$xPos+$yPos -font 6x10"
# if {$xPos} {
# set xPos 0
# incr yPos 145
# if {$yPos > 800} {set yPos 0}
# } else {
# set xPos 500
# }
# }
#
# The xtermArgs variable in the code above is the variable
# corresponding to the -xa argument.
#
# xterms can be also be created directly. The following command
# file creates three xterms overlapped horizontally:
#
# set xPos 0
#
# foreach name {bud dexter hotdog} {
# set ::xtermArgs "-geometry 80x12+$xPos+0 -font 6x10"
# set ::xtermNames $name
# xtermStartAll
# incr xPos 300
# }
#
# USAGE SUGGESTION - SELECTING HOSTS BY NICKNAME
# The following .multixtermrc shows an example of changing the
# default handling of the arguments from hostnames to a filename
# containing hostnames:
#
# set xtermNames [exec cat $argv]
#
# The following is a variation, retrieving the host names from
# the yp database:
#
# set xtermNames [exec ypcat $argv]
#
# The following hardcodes two sets of hosts, so that you can
# call multixterm with either "cluster1" or "cluster2":
#
# switch $argv {
# cluster1 {
# set xtermNames "bud dexter"
# }
# cluster2 {
# set xtermNames "frank hotdog weiner"
# }
# }
#
# COMPARE/CONTRAST
# It is worth comparing multixterm to xkibitz. Multixterm
# connects a separate process to each xterm. xkibitz connects
# the same process to each xterm.
#
# LIMITATIONS
# Multixterm provides no way to remotely control scrollbars,
# resize, and most other window system related functions.
#
# Multixterm can only control new xterms that multixterm itself
# has started.
#
# As a convenience, the File menu shows a limited number of
# files. To show all the files, use File->Open.
#
# FILES
# $DOTDIR/.multixtermrc initial command file
# ~/.multixtermrc fallback command file
# ~/lib/multixterm/ default command file directory
#
# BUGS
# If multixterm is killed using an uncatchable kill, the xterms
# are not killed. This appears to be a bug in xterm itself.
#
# Send/expect sequences can be done in multixterm command files.
# However, due to the richness of the possibilities, to document
# it properly would take more time than the author has at present.
#
# REQUIREMENTS
# Requires Expect 5.36.0 or later.
# Requires Tk 8.3.3 or later.
#
# VERSION
#! $::versionString
# The latest version of multixterm is available from
# http://expect.nist.gov/example/multixterm . If your version of Expect
# and Tk are too old (see REQUIREMENTS above), download a new version of
# Expect from http://expect.nist.gov
#
# DATE
#! $::versionDate
#
# AUTHOR
# Don Libes <don@libes.com>
#
# LICENSE
# Multixterm is in the public domain; however the author would
# appreciate acknowledgement if multixterm or parts of it or ideas from
# it are used.
######################################################################
# user-settable things - override them in the ~/.multixtermrc file
# or via command-line options
######################################################################
set palette #d8d8ff ;# lavender
set colorTyping green
set colorFocusIn aquamarine
set xtermNames {}
set xtermCmd $env(SHELL)
set xtermArgs ""
set cmdDir ~/lib/multixterm
set inputLabel "stdin window"
set fileMenuMax 30 ;# max number of files shown in File menu
set tearoffMenuMin 2 ;# min number of files needed to enable the File
;# menu to be torn off
proc initLate {} {} ;# anything that must be done late in initialization
;# such as adding/modifying bindings, may be done by
;# redefining this
######################################################################
# end of user-settable things
######################################################################
######################################################################
# sanity checking
######################################################################
set versionString 1.8
set versionDate "2004/06/29"
package require Tcl
catch {package require Tk} ;# early versions of Tk had no package
package require Expect
proc exit1 {msg} {
puts "multixterm: $msg"
exit 1
}
exp_version -exit 5.36
proc tkBad {} {
exit1 "requires Tk 8.3.3 or later but you are using Tk $::tk_patchLevel."
}
if {$tk_version < 8.3} {
tkBad
} elseif {$tk_version == 8.3} {
if {[lindex [split $tk_patchLevel .] 2] < 3} tkBad
}
######################################################################
# process args - has to be done first to get things like -xv working ASAP
######################################################################
# set up verbose mechanism early
set verbose 0
proc verbose {msg} {
if {$::verbose} {
if {[info level] > 1} {
set proc [lindex [info level -1] 0]
} else {
set proc main
}
puts "$proc: $msg"
}
}
# read a single argument from the command line
proc arg_read1 {var args} {
if {0 == [llength $args]} {
set argname -$var
} else {
set argname $args
}
upvar argv argv
upvar $var v
verbose "$argname"
if {[llength $argv] < 2} {
exit1 "$argname requires an argument"
}
set v [lindex $argv 1]
verbose "set $var $v"
set argv [lrange $argv 2 end]
}
proc xtermUsage {{msg {}}} {
if {![string equal $msg ""]} {
puts "multixtermrc: $msg"
}
puts {usage: multixterm [flags] ... where flags are:
[-xa "xterm args"]
[-xc "command"]
[-xd "directory"]
[-xf "file"]
[-xn "xterm names"]
[-xv] (enable verbose mode)
[-xh] or [-x?] (help)
[xterm names or user-defined args...]}
exit
}
while {[llength $argv]} {
set flag [lindex $argv 0]
switch -- $flag -x? - -xh {
xtermUsage
} -xc {
arg_read1 xtermCmd -xc
} -xn {
arg_read1 xtermNames -xn
} -xa {
arg_read1 xtermArgs -xa
} -xf {
arg_read1 cmdFile -xf
if {![file exists $cmdFile]} {
exit1 "can't read $cmdFile"
}
} -xd {
arg_read1 cmdDir -xd
if {![file exists $cmdDir]} {
exit1 "can't read $cmdDir"
}
} -xv {
set argv [lrange $argv 1 end]
set verbose 1
puts "main: verbose on"
} default {
verbose "remaining args: $argv"
break ;# let user handle remaining args later
}
}
######################################################################
# determine and load rc file - has to be done now so that widgets
# can be affected
######################################################################
# if user has no $DOTDIR, fall back to home directory
if {![info exists env(DOTDIR)]} {
set env(DOTDIR) ~
}
# catch bogus DOTDIR, otherwise glob will lose the bogus directory
# and it won't appear in the error msg
if {[catch {glob $env(DOTDIR)} dotdir]} {
exit1 "$env(DOTDIR)/.multixtermrc can't be found because $env(DOTDIR) doesn't exist or can't be read"
}
set rcFile $dotdir/.multixtermrc
set fileTypes {
{{Multixterm Files} *.mxt}
{{All Files} *}
}
proc openFile {{fn {}}} {
verbose "opening $fn"
if {[string equal $fn ""]} {
set fn [tk_getOpenFile \
-initialdir $::cmdDir \
-filetypes $::fileTypes \
-title "multixterm file"]
if {[string match $fn ""]} return
}
uplevel #0 source [list $fn]
verbose "xtermNames = \"$::xtermNames\""
verbose "xtermCmd = $::xtermCmd"
}
if {[file exists $rcFile]} {
openFile $rcFile
} else {
verbose "$rcFile: not found"
}
if {![string equal "" $argv]} {
if {[string equal $xtermNames ""]} {
set xtermNames $argv
}
}
######################################################################
# Describe and initialize some important globals
######################################################################
# ::activeList and ::activeArray both track which xterms to send
# (common) keystrokes to. Each element in activeArray is connected to
# the active menu. The list version is just a convenience making the
# send function easier/faster.
set activeList {}
# ::names is an array of xterm names indexed by process spawn ids.
set names(x) ""
unset names(x)
# ::xtermSid is an array of xterm spawn ids indexed by process spawn ids.
# ::xtermPid is an array of xterm pids indexed by process spawn id.
######################################################################
# create an xterm and establish connections
######################################################################
proc xtermStart {cmd name} {
verbose "starting new xterm running $cmd with name $name"
######################################################################
# create pty for xterm
######################################################################
set pid [spawn -noecho -pty]
verbose "spawn -pty: pid = $pid, spawn_id = $spawn_id"
set sidXterm $spawn_id
stty raw -echo < $spawn_out(slave,name)
regexp ".*(.)(.)" $spawn_out(slave,name) dummy c1 c2
if {[string compare $c1 "/"] == 0} {
set c1 0
}
######################################################################
# prepare to start xterm by making sure xterm name is unique
# X doesn't care but active menu won't make sense unless names are unique
######################################################################
set unique 1
foreach oldName [array names ::names] {
if {[string match "$name" $::names($oldName)]} {
set unique 0
}
}
verbose "uniqueness of $name: $unique"
set safe [safe $name]
# if not unique, look at the numerical suffixes of all matching
# names, find the biggest and increment it
if {!$unique} {
set suffix 2
foreach oldName [array names ::names] {
verbose "regexp ^[set safe](\[0-9]+)$ $::names($oldName) X num"
if {[regexp "^[set safe](\[0-9]+)$" $::names($oldName) X num]} {
verbose "matched, checking suffix"
if {$num >= $suffix} {
set suffix [expr $num+1]
verbose "new suffix: $suffix"
}
}
}
append name $suffix
verbose "new name: $name"
}
######################################################################
# start new xterm
######################################################################
set xtermpid [eval exec xterm -name [list $name] -S$c1$c2$spawn_out(slave,fd) $::xtermArgs &]
verbose "xterm: pid = $xtermpid"
close -slave
# xterm first sends back window id, save in environment so it can be
# passed on to the new process
log_user 0
expect {
eof {wait;return}
-re (.*)\n {
# convert hex to decimal
# note quotes must be used here to avoid diagnostic from expr
set ::env(WINDOWID) [expr "0x$expect_out(1,string)"]
}
}
######################################################################
# start new process
######################################################################
set pid [eval spawn -noecho $cmd]
verbose "$cmd: pid = $pid, spawn_id = $spawn_id"
set sidCmd $spawn_id
lappend ::activeList $sidCmd
set ::activeArray($sidCmd) 1
######################################################################
# link everything back to spawn id of new process
######################################################################
set ::xtermSid($sidCmd) $sidXterm
set ::names($sidCmd) $name
set ::xtermPid($sidCmd) $xtermpid
######################################################################
# connect proc output to xterm output
# connect xterm input to proc input
######################################################################
expect_background {
-i $sidCmd
-re ".+" [list sendTo $sidXterm]
eof [list xtermKill $sidCmd]
-i $sidXterm
-re ".+" [list sendTo $sidCmd]
eof [list xtermKill $sidCmd]
}
.m.e entryconfig Active -state normal
.m.e.active add checkbutton -label $name -variable activeArray($sidCmd) \
-command [list xtermActiveUpdate $sidCmd]
set ::activeArray($sidCmd) 1
}
proc xtermActiveUpdate {sid} {
if {$::activeArray($sid)} {
verbose "activating $sid"
} else {
verbose "deactivating $sid"
}
activeListUpdate
}
proc activeListUpdate {} {
set ::activeList {}
foreach n [array names ::activeArray] {
if {$::activeArray($n)} {
lappend ::activeList $n
}
}
}
# make a string safe to go through regexp
proc safe {s} {
string map {{[} {\[} {*} {\*} {+} {\+} {^} {\^} {$} {\\$}} $s
}
# utility to map xterm name to spawn id
# multixterm doesn't use this but a user might want to
proc xtermGet {name} {
foreach sid [array names ::names] {
if {[string equal $name $::names($sid)]} {
return $sid
}
}
error "no such term with name: $name"
}
# utility to activate an xterm
# multixterm doesn't use this but a user might want to
proc xtermActivate {sid} {
set ::activeArray($sid) 1
xtermActiveUpdate $sid
}
# utility to deactivate an xterm
# multixterm doesn't use this but a user might want to
proc xtermDeactivate {sid} {
set ::activeArray($sid) 0
xtermActiveUpdate $sid
}
# utility to do an explicit Expect
# multixterm doesn't use this but a user might want to
proc xtermExpect {args} {
# check if explicit spawn_id in args
for {set i 0} {$i < [llength $args]} {incr i} {
switch -- [lindex $args $i] "-i" {
set sidCmd [lindex $args [incr i]]
break
}
}
if {![info exists sidCmd]} {
# nothing explicit, so get it from the environment
upvar spawn_id spawn_id
# mimic expect's normal behavior in obtaining spawn_id
if {[info exists spawn_id]} {
set sidCmd $spawn_id
} else {
set sidCmd $::spawn_id
}
}
# turn off bg expect, do fg expect, then re-enable bg expect
expect_background -i $sidCmd ;# disable bg expect
eval expect $args ;# fg expect
;# reenable bg expect
expect_background {
-i $sidCmd
-re ".+" [list sendTo $::xtermSid($sidCmd)]
eof [list xtermKill $sidCmd]
}
}
######################################################################
# connect main window keystrokes to all xterms
######################################################################
proc xtermSend {A} {
if {[info exists ::afterId]} {
after cancel $::afterId
}
.input config -bg $::colorTyping
set ::afterId [after 1000 {.input config -bg $colorCurrent}]
exp_send -raw -i $::activeList -- $A
}
proc sendTo {to} {
exp_send -raw -i $to -- $::expect_out(buffer)
}
# catch the case where there's no selection
proc xtermPaste {} {catch {xtermSend [selection get]}}
######################################################################
# clean up an individual process death or xterm death
######################################################################
proc xtermKill {s} {
verbose "killing xterm $s"
if {![info exists ::xtermPid($s)]} {
verbose "too late, already dead"
return
}
catch {exec /bin/kill -9 $::xtermPid($s)}
unset ::xtermPid($s)
# remove sid from activeList
verbose "removing $s from active array"
catch {unset ::activeArray($s)}
activeListUpdate
verbose "removing from background handler $s"
catch {expect_background -i $s}
verbose "removing from background handler $::xtermSid($s)"
catch {expect_background -i $::xtermSid($s)}
verbose "closing proc"
catch {close -i $s}
verbose "closing xterm"
catch {close -i $::xtermSid($s)}
verbose "waiting on proc"
wait -i $s
wait -i $::xtermSid($s)
verbose "done waiting"
unset ::xtermSid($s)
# remove from active menu
verbose "deleting active menu entry $::names($s)"
# figure out which it is
# avoid using name as an index since we haven't gone to any pains to
# make it safely interpreted by index-pattern code. instead step
# through, doing the comparison ourselves
set last [.m.e.active index last]
# skip over tearoff
for {set i 1} {$i <= $last} {incr i} {
if {![catch {.m.e.active entrycget $i -label} label]} {
if {[string equal $label $::names($s)]} break
}
}
.m.e.active delete $i
unset ::names($s)
# if none left, disable menu
# this leaves tearoff clone but that seems reasonable
if {0 == [llength [array names ::xtermSid]]} {
.m.e entryconfig Active -state disable
}
}
######################################################################
# create windows
######################################################################
tk_setPalette $palette
menu .m -tearoff 0
.m add cascade -menu .m.f -label "File" -underline 0
.m add cascade -menu .m.e -label "Edit" -underline 0
.m add cascade -menu .m.help -label "Help" -underline 0
set files [glob -nocomplain $cmdDir/*]
set filesLength [llength $files]
if {$filesLength >= $tearoffMenuMin} {
set filesTearoff 1
} else {
set filesTearoff 0
}
menu .m.f -tearoff $filesTearoff -title "multixterm files"
menu .m.e -tearoff 0
menu .m.help -tearoff 0
.m.f add command -label Open -command openFile -underline 0
if {$filesLength} {
.m.f add separator
set files [lsort $files]
set files [lrange $files 0 $fileMenuMax]
foreach f $files {
.m.f add command -label $f -command [list openFile $f]
}
.m.f add separator
}
.m.f add command -label "Exit" -command exit -underline 0
.m.e add command -label "Paste" -command xtermPaste -underline 0
.m.e add cascade -label "Active" -menu .m.e.active -underline 0
.m.help add command -label "About" -command about -underline 0
.m.help add command -label "Man Page" -command help -underline 0
. config -m .m
menu .m.e.active -tearoff 1 -title "multixterm active"
.m.e entryconfig Active -state disabled
# disable the Active menu simply because it looks goofy seeing an empty menu
# for consistency, though, it should be enabled
entry .input -textvar inputLabel -justify center -state disabled
entry .cmd -textvar xtermCmd
button .exec -text "new xterm" -command {xtermStart $xtermCmd $xtermCmd}
grid .input -sticky ewns
grid .cmd -sticky ew
grid .exec -sticky ew -ipadx 3 -ipady 3
grid columnconfigure . 0 -weight 1
grid rowconfigure . 0 -weight 1 ;# let input window only expand
bind .cmd <Return> {xtermStart $xtermCmd $xtermCmd}
# send all keypresses to xterm
bind .input <KeyPress> {xtermSend %A ; break}
bind .input <Alt-KeyPress> {xtermSend \033%A; break}
bind .input <Meta-KeyPress> {xtermSend \033%A; break}
bind .input <<Paste>> {xtermPaste ; break}
bind .input <<PasteSelection>> {xtermPaste ; break}
# arrow keys - note that if they've been rebound through .Xdefaults
# you'll have to change these definitions.
bind .input <Up> {xtermSend \033OA; break}
bind .input <Down> {xtermSend \033OB; break}
bind .input <Right> {xtermSend \033OC; break}
bind .input <Left> {xtermSend \033OD; break}
# Strange: od -c reports these as \033[A et al but when keypad mode
# is initialized, they send \033OA et al. Presuming most people
# want keypad mode, I'll go with the O versions. Perhaps the other
# version is just a Sun-ism anyway.
set colorCurrent [.input cget -bg]
set colorFocusOut $colorCurrent
# change color to show focus
bind .input <FocusOut> colorFocusOut
bind .input <FocusIn> colorFocusIn
proc colorFocusIn {} {.input config -bg [set ::colorCurrent $::colorFocusIn]}
proc colorFocusOut {} {.input config -bg [set ::colorCurrent $::colorFocusOut]}
# convert normal mouse events to focusIn
bind .input <1> {focus .input; break}
bind .input <Shift-1> {focus .input; break}
# ignore all other mouse events that might make selection visible
bind .input <Double-1> break
bind .input <Triple-1> break
bind .input <B1-Motion> break
bind .input <B2-Motion> break
set scriptName [info script] ;# must get while it's active
proc about {} {
set w .about
if {[winfo exists $w]} {
wm deiconify $w
raise $w
return
}
toplevel $w
wm title $w "about multixterm"
wm iconname $w "about multixterm"
wm resizable $w 0 0
button $w.b -text Dismiss -command [list wm withdraw $w]
label $w.title -text "multixterm" -font "Times 16" -borderwidth 10 -fg red
label $w.version -text "Version $::versionString, Released $::versionDate"
label $w.author -text "Written by Don Libes <don@libes.com>"
label $w.using -text "Using Expect [exp_version],\
Tcl $::tcl_patchLevel,\
Tk $::tk_patchLevel"
grid $w.title
grid $w.version
grid $w.author
grid $w.using
grid $w.b -sticky ew
}
proc help {} {
if {[winfo exists .help]} {
wm deiconify .help
raise .help
return
}
toplevel .help
wm title .help "multixterm help"
wm iconname .help "multixterm help"
scrollbar .help.sb -command {.help.text yview}
text .help.text -width 74 -height 30 -yscroll {.help.sb set} -wrap word
button .help.ok -text Dismiss -command {destroy .help} -relief raised
bind .help <Return> {destroy .help;break}
grid .help.sb -row 0 -column 0 -sticky ns
grid .help.text -row 0 -column 1 -sticky nsew
grid .help.ok -row 1 -columnspan 2 -sticky ew -ipadx 3 -ipady 3
# let text box only expand
grid rowconfigure .help 0 -weight 1
grid columnconfigure .help 1 -weight 1
set script [auto_execok $::scriptName]
if {[llength $script] == 0} {
set script /depot/tcl/bin/multixterm ;# fallback
}
if {[catch {open $script} fid]} {
.help.text insert end "Could not open help file: $script"
} else {
# skip to the beginning of the actual help (starts with "NAME")
while {-1 != [gets $fid buf]} {
if {1 == [regexp "NAME" $buf]} {
.help.text insert end "\n NAME\n"
break
}
}
while {-1 != [gets $fid buf]} {
if {0 == [regexp "^#(.?)(.*)" $buf X key buf]} break
if {$key == "!"} {
set buf [subst -nocommands $buf]
set key " "
}
.help.text insert end $key$buf\n
}
}
# support scrolling beyond Tk's built-in Next/Previous
foreach w {"" .sb .text .ok} {
set W .help$w
bind $W <space> {scrollPage 1} ;#more
bind $W <Delete> {scrollPage -1} ;#more
bind $W <BackSpace> {scrollPage -1} ;#more
bind $W <Control-v> {scrollPage 1} ;#emacs
bind $W <Meta-v> {scrollPage -1} ;#emacs
bind $W <Control-f> {scrollPage 1} ;#vi
bind $W <Control-b> {scrollPage -1} ;#vi
bind $W <F35> {scrollPage 1} ;#sun
bind $W <F29> {scrollPage -1} ;#sun
bind $W <Down> {scrollLine 1}
bind $W <Up> {scrollLine -1}
}
}
proc scrollPage {dir} {
tkScrollByPages .help.sb v $dir
return -code break
}
proc scrollLine {dir} {
tkScrollByUnits .help.sb v $dir
return -code break
}
######################################################################
# exit handling
######################################################################
# xtermKillAll is not intended to be user-callable. It just kills
# the processes and that's it. A user-callable version would update
# the data structures, close the channels, etc.
proc xtermKillAll {} {
foreach sid [array names ::xtermPid] {
exec /bin/kill -9 $::xtermPid($sid)
}
}
rename exit _exit
proc exit {{x 0}} {xtermKillAll;_exit $x}
wm protocol . WM_DELETE_WINDOW exit
trap exit SIGINT
######################################################################
# start any xterms requested
######################################################################
proc xtermStartAll {} {
verbose "xtermNames = \"$::xtermNames\""
foreach n $::xtermNames {
regsub -all "%n" $::xtermCmd $n cmdOut
xtermStart $cmdOut $n
}
set ::xtermNames {}
}
initLate
# now that xtermStartAll and its accompanying support has been set up
# run it to start anything defined by rc file or command-line args.
xtermStartAll ;# If nothing has been requested, this is a no-op.
# finally do any explicit command file
if {[info exists cmdFile]} {
openFile $cmdFile
}
puts hello
Tcl and UNIX scripting saved the day again.
Labels: Tcl
