/usr/games/sc_remote is in scid 1:4.5.1.cvs20140429-2.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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# Emacs please open me in -*-Tcl-*- mode
# the next line restarts using wish if it is in the path \
exec wish "$0" ${1+"$@"}
#
###############################################################################
#
#
# Copyright (C) 2002 Mark Norman Oakden.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
###############################################################################
#
# sc_remote: Load a scid databases in an existing Scid instances
#
# usage: sc_remote [-nostatus] [ [ [DB ... ] DB ] DB ]
#
# Scid is a free chess database app. For more information,
# visit the Scid website: http://scid.sourceforge.net/
#
#
###############################################################################
#
# We are running in wish but don't need the Tk window (although we have to
# use wish to get the winfo and send commands).
#
wm withdraw .
#
set debugging 0
#
# showStatus determines whether a status window is displayed or not
#
set showStatus 0
#
# msgWidth is the width of status messages in the status window
#
set msgWidth 25
#
# textFont should be a fixed width font for the status window
#
set textFont [list fixed 11 normal roman]
#
# debug proc
#
proc dputs { args } {
global debugging
if {$debugging} {
eval puts $args
}
}
#
# we will wait for smallTime between retries of a busy interpreter
#
set smallTime 400 ;# in milliseconds 1000 == 1 second
#
# we will retry a maximum of maxRetries times for a busy interpreter to
# become unbusy
#
set maxRetries 10
#
###############################################################################
#
# Functions:
#
proc usage {} {
set me [file tail [info script]]
puts stdout "Usage: $me \[-nostatus|-status\] \[<Scid flags>\] \[DB \[DB ...\]\]"
exit
}
proc dismissStatusWin {} {
global statusWinDismissed
wm withdraw .
set statusWinDismissed 1
}
proc makeStatusWindow { {lines 4} } {
global showStatus msgWidth textFont
if { ! $showStatus } { return }
dputs "making status window height=$lines"
wm protocol . WM_DELETE_WINDOW dismissStatusWin
label .name -text "sc_remote Status"
text .t -wrap none -width [expr $msgWidth + 32] -height $lines \
-font $textFont -background \#ffffff \
-xscrollcommand [list .x set] \
-yscrollcommand [list .y set]
scrollbar .x -orient horizontal -command [list .t xview]
scrollbar .y -command [list .t yview]
grid .name -
grid .y -row 1 -column 1 -sticky ns
grid .x -row 2 -column 0 -sticky ew
grid .t -row 1 -column 0 -sticky news
button .close -command dismissStatusWin -text "Dismiss"
grid .close -
grid columnconfigure . 0 -weight 1
grid columnconfigure . 1 -weight 0
grid rowconfigure . 1 -weight 1
grid rowconfigure . 2 -weight 0
# tags for message colours
.t tag configure green -foreground \#228b22
.t tag configure amber -foreground \#ff8c00
.t tag configure red -foreground \#8b0000
#
.t configure -state disabled
centreWin .
update
}
proc setStringWidth { str {width 12} {padchar " "} } {
# padchar is assumed of length 1 later so ensure it is now
if { [string length $padchar] != 1 } {
set padchar " "
}
if { [set l [string length $str]] == $width } {
return $str
}
if { $l > $width } {
return [string range $str 0 [expr $width - 1]]
} else {
# use a for loop rather than string repeat for back compatibility
# in Tcl/Tk versions
for { set i $l } { $i < $width } { incr i } {
append str $padchar
}
return $str
}
}
# tag shold be one of the tags defined in the makeStatusWindow function
proc updateStatus { file mesg {tag amber} } {
global showStatus msgWidth
if { ! $showStatus } { return }
set mesg [setStringWidth $mesg $msgWidth]
set t .t
$t configure -state normal
if { [set ind [$t search $file 1.0 end]] != "" } {
# update the existing line for $file
set l [lindex [split $ind .] 0]
$t delete $l.0 $l.$msgWidth
$t insert $l.0 $mesg $tag
#$t see $l.0
} else {
# add a new line for $file
$t insert end $mesg $tag
$t insert end " "
$t insert end $file
$t insert end "\n"
#$t see end
}
$t configure -state disabled
raise .
update
}
#
# centreWin is borrowed from Scid source (misc.tcl)
# and is Copyright (C) Shane Hudson
#
# centreWin:
# Centers a window on the screen.
#
proc centreWin {w} {
wm withdraw $w
update idletasks
set x [expr {[winfo screenwidth $w]/2 - [winfo reqwidth $w]/2 \
- [winfo vrootx .]}]
set y [expr {[winfo screenheight $w]/2 - [winfo reqheight $w]/2 \
- [winfo vrooty .]}]
wm geom $w +$x+$y
wm deiconify $w
}
#
# getScidList returns a list of Scid interpreters on the current display
#
proc getScidList {} {
set ret [list]
foreach i [winfo interps] {
if { [validScidInterp $i] } {
lappend ret $i
}
}
dputs "Found the following list of scid interpreters /$ret/"
return $ret
}
#
# validScidInterp tests that an interpreter found on the display is
# indeed a contactable Scid. First the name is matched against the
# pattern "scid*", then a send is tried with the "sc_info version"
# command. Finally, a variable (scidExeDir) which is set within the
# scid script is tested for existance. If all three of these tests
# succeed we assume we have a Scid.
#
proc validScidInterp { scid } {
if { ! [string match "scid*" $scid] } {
return 0
# we "catch" the first [send] since we don't yet know if [send]
# works
} elseif { [catch {send $scid sc_info version} res] } {
return 0
} elseif { ! [send $scid info exists scidExeDir] } {
return 0
} else {
return 1
}
}
#
# querySlotStatus interrogates a scid interpreter for the list of files
# loaded in its slots.
#
# It will return a list of 2*N elements, where N is the number of non-
# clipbase slots, in the form (where $scid is the name of the interp)
#
# $scid,1 filename1 $scid,2 - $scid,3 filename2 $scid,4 -
#
# i.e in a suitable form for array set...
#
proc querySlotStatus { scid } {
set ret [list]
set cb [send $scid sc_info clipbase]
set max [send $scid sc_base count total]
for { set i 1 } { $i <= $max } { incr i } {
if { $i == $cb } { continue }
lappend ret $scid,$i
set f [send $scid sc_base filename $i]
# [<anything>] is assumed to be [empty] or a translation since
# we shouldn't see [clipbase] (or translation thereof) here
if { [string match {\[*\]} $f] } {
set f "-"
}
lappend ret $f
}
return $ret
}
#
# fillSlotTable fills up a slots array with all slot info for Scids
# on this display
#
# note that [array set] will add to an existing array, overwriting
# elements if necessary
#
proc fillSlotTable { arrName } {
upvar $arrName arr
foreach scid [getScidList] {
array set arr [querySlotStatus $scid]
}
}
#
# index slot table creates an array having keys which are the
# values in the slots array and whose values are lists of the
# indexes in the slots array with that value
#
proc indexSlotTable { slotArrName indexArrName } {
upvar $slotArrName slots
upvar $indexArrName index
foreach {key val} [array get slots] {
lappend index($val) $key
}
}
#
# isBusy tests a Scid interp for busy status (assumed busy if cursor of .
# is "watch") - actually this isn't quite sufficient since scid may be
# busy starting up - we also need to check the startup window for the
# "Startup completed" message...
#
proc isBusy { interp } {
set ret 0
if { [send $interp winfo exists .splash.t] } {
# splash screen text widget exists see if startup is finished
set cmd [list .splash.t search "Startup complete" 1.0 end]
if { "[send $interp $cmd]" == "" } {
# startup isn't complete yet - assume busy
dputs "isBusy: no \"Startup complete\" message - assume busy"
return 1
}
} else {
# there was no splash screen yet - assume busy
dputs "isBusy: no splash screen text widget - assume busy"
return 1
}
# if we got here then there is a splash screen and it contains
# "Startup complete". Now we go by the cursor status
dputs "isBusy - using cursor status to determine busy status"
return [expr { "watch" == "[send $interp . cget -cursor]" }]
}
#
# ldelete removes all occurences of an item from a list
#
proc ldelete { li el } {
upvar $li l
while { [set indx [lsearch -exact $l $el]] != -1 } {
set l [lreplace $l $indx $indx]
}
return
}
#
# The fullname function is stolen from Scid source (end.tcl)
# and is Copyright (C) Shane Hudson
#
# fullname:
# Given a file name, returns its absolute name.
#
proc fullname {fname} {
# modified MNO - don't immediately return on absolute pathname
# - try to add suffix in that case too.
if { [file pathtype $fname] != "absolute"} {
set old [pwd]
if {[catch {cd [file dirname $fname]}]} { return $fname }
set fname [file join [pwd] [file tail $fname]]
catch {cd $old}
}
# Try adding a suffix like ".si3" or ".pgn" to the filename if
# it has no extension, by checking if a file by that name with
# a known Scid-readable extension exists:
if {[file extension $fname] == ""} {
foreach suffix [list si3 si pgn PGN pgn.gz epd EPD epd.gz sor] {
if {[file exists "$fname.$suffix"]} {
dputs "Assuming suffix \".$suffix\" for \"$fname\""
append fname ".$suffix"
break
}
}
}
return $fname
}
#
###############################################################################
#
# find which databases are in which slots and store in slots array:-
# the slots array and slotIndex array are assumed not to pre-exist!
#
array set slots {}
array set slotIndex {}
fillSlotTable slots
indexSlotTable slots slotIndex
#
# create the to-open list from our command line args. Filter off any
# arguments which start with a "-" into scidArgs list which will be
# passed to any new Scid we invoke. If we see a "-nostatus" argument
# switch off the status Window and don't pass this arg to Scid.
#
if { $argc == 0 } {
usage
}
#
set toOpen [list]
set scidArgs [list]
foreach arg $argv {
if { [string match "-*" $arg] } {
if { "-nostatus" == $arg } {
set showStatus 0
} elseif { "-status" == $arg } {
set showStatus 1
} else {
lappend scidArgs $arg
}
} else {
set f [fullname $arg]
lappend toOpen $f
}
}
#
# make a statusWindow if one is required
#
makeStatusWindow [llength $toOpen]
#
# initialise status window
#
# updateStatus already tests $showStatus and exits if it is 0 however,
# I'll check it again here for speed...
#
if { $showStatus } {
foreach db $toOpen {
updateStatus $db "Testing..." amber
}
}
#
# for each database DB in the to-open list, If DB is already open
# and the Scid is not open, we switch the active slot to that with DB,
# raise the Scid instance and remove the DB from to-open list. If
# the instance was busy, we add an entry to the deferredSwitch array
# to indicate a slot to try to switch in that Scid after all other
# operations are complete.
#
# the deferredSwitch array will contain one entry per Scid interpreter
# that was found to be busy at this stage, whose value is set to the
# slot number to switch to. We only store one slot per interp since
# it doesn't make sense to switch to more than one slot.
#
catch {unset deferredSwitch}
array set deferredSwitch {}
dputs "Checking if the requested databases are already open in a Scid"
foreach db $toOpen {
# if the file is .s? or .s?3, strip the extension before comparing
# since Scid reports these without extensions in
if { [string match "*.s?*" $db] } {
set cdb [file rootname $db]
} else {
set cdb $db
}
if { [info exists slotIndex($cdb)] } {
updateStatus $db "Already open..." amber
dputs "The database $db is open..."
foreach {interp slot} [split [lindex $slotIndex($cdb) 0] \,] \
{break}
dputs " ... in $interp slot $slot, attempting to switch to it"
if { [isBusy $interp] } {
updateStatus $db "Scid busy..." amber
dputs " ... interp $interp is busy - deferring switch to end"
set deferredSwitch($interp) $slot
} else {
#send $interp sc_base switch $slot
send $interp ::file::SwitchToBase $slot
send $interp ::tree::refresh
send $interp ::windows::stats::Refresh
send $interp ::windows::switcher::Refresh
send $interp wm deiconify .
send $interp update
send $interp raise .
updateStatus $db "Done (Displayed)" green
}
ldelete toOpen $db
}
}
#
# while the to-open list is not empty, if there are entries in the
# free slot list, load first DB in to-open list in that Scid instance
# and delete it from the to-open list. If no slots are available exec
# a new Scid instance with DB as command line arg. After each DB
# update the slot listings and indexes
#
while { [llength $toOpen] > 0 } {
dputs "Dealing with remaining non-open databases /$toOpen/ ..."
set next [lindex $toOpen 0]
dputs " next database is $next"
ldelete toOpen $next
# if there are free slots - use one...
if { [info exists slotIndex(-) ] } {
foreach {interp slot} [split [lindex $slotIndex(-) 0] \,] {
# test each interp for busy status, once per free slot
# until we get a non-busy interp
if { [isBusy $interp] } {
dputs "skipping interpreter $interp - it was busy (first pass)"
continue
} else {
dputs "using interpreter $interp - it isn't busy (first pass)"
break
}
}
# if we got here, either interp is a non-busy interp
# or *all* interps were busy when we checked before. for
# safety, test for busy status.
set iterations 0
dputs "(Re-)Checking busy status of $interp"
while { [isBusy $interp] && ( $iterations < $maxRetries ) } {
dputs "$interp is busy, waiting - iteration number $iterations"
after $smallTime
incr iterations
}
# If interp is still busy now, give up and open a new scid
# otherwise open $next in $interp
if { [isBusy $interp] } {
# The bracketing and eval is required because:-
# 1. scidArgs may be a list and
# 2. $next may contain spaces.
updateStatus $next "Done (Open new Scid)" green
dputs "Gave up waiting for interp $interp exec a new one for $next"
eval {exec nohup scid} $scidArgs {$next} &
# wait a short time for the new Scid to startup so that it
# will show up in the updated slot list
dputs "waiting 250ms"
after 250
} else {
dputs "$interp is not busy - opening new db $next in it"
updateStatus $next "Done (Open existing Scid)" green
send $interp wm deiconify .
send $interp ::file::Open $next
send $interp raise .
}
} else {
# no interps with free slots were available so background
# execute scid to open $next.
dputs "Couldn't find any free slots, start a new interp for $next"
updateStatus $next "Done (Open new Scid)" green
eval {exec nohup scid} $scidArgs {$next} &
# wait a short time for the new Scid to startup so that it
# will show up in the updated slot list
dputs "waiting 250ms"
after 250
}
# update the slot list/index
dputs "Updating lists"
catch {unset slots}
array set slots {}
fillSlotTable slots
#
catch {unset slotIndex}
array set slotIndex {}
indexSlotTable slots slotIndex
}
#
# Try the deferred switches again, this time with delays/retries
# (Multiple consecutive close brackets hold no fear for lisp hackers!)
#
while { [llength [set l [array names deferredSwitch]]] > 0 } {
dputs "Processing deferred switch operations"
set interp [lindex $l 0]
set slot $deferredSwitch($interp)
set iterations 0
dputs "Checking busy status of $interp"
while { [isBusy $interp] && ( $iterations < $maxRetries ) } {
dputs "$interp is busy, waiting - iteration number $iterations"
updateStatus $slots($interp,$slot) "Scid busy - Waiting..." amber
after $smallTime
incr iterations
}
# If interp is still busy now, give up, otherwise execute a switchBase
# in the interp.
if { ! [isBusy $interp] } {
dputs "inter $interp is now not busy - switching it to slot $slot"
updateStatus $slots($interp,$slot) "Done (Deferred Display)" green
send $interp ::file::SwitchToBase $slot
send $interp ::tree::refresh
send $interp ::windows::stats::Refresh
send $interp ::windows::switcher::Refresh
send $interp wm deiconify .
send $interp update
send $interp raise .
} else {
updateStatus $slots($interp,$slot) "Gave up - Scid still busy" red
dputs "interp $interp still busy - giving up on switching slots"
}
unset deferredSwitch($interp)
}
#
# check if the status window was intially displayed and has now been
# dismissed, and if not, wait until it is
if { ! [info exists statusWinDismissed] && $showStatus } {
# don't exit until statusWin is dismissed
raise .
vwait statusWinDismissed
}
after 500 exit
#
###############################################################################
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