#! /bin/sh
#
# Copyright (C) 1999-2003 Jeff Fisher (guppy@eggheads.org)
# Copyright (C) 2004-2023 Eggheads Development Team
#
# systemd formatting contributed by PeGaSuS
#
# 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

# This trick is borrowed from Tothwolf's Wolfpack \
# Check for working 'grep -E' before using 'egrep' \
if echo a | (grep -E '(a|b)') >/dev/null 2>&1; \
then \
  egrep="grep -E"; \
else \
  egrep=egrep; \
fi; \
# Search for tclsh[0-9].[0-9] in each valid dir in PATH \
for dir in $(echo $PATH | sed 's/:/ /g'); \
do \
  if test -d $dir; \
  then \
    files=$(/bin/ls $dir | $egrep '^tclsh[0-9]\.[0-9]$'); \
    if test "$files" != ""; \
    then \
      versions="${versions:+$versions }$(echo $files | sed 's/tclsh//g')"; \
    fi; \
  fi; \
done; \
for ver in $versions; \
do \
  tmpver=$(echo $ver | sed 's/\.//g'); \
  if test "$lasttmpver" != ""; \
  then \
    if test "$tmpver" -gt "$lasttmpver"; \
    then \
      lastver=$ver; \
      lasttmpver=$tmpver; \
    fi; \
  else \
    lastver=$ver; \
    lasttmpver=$tmpver; \
  fi; \
done; \
exec tclsh$lastver "$0" ${1+"$@"}
#
# AutoBotchk - An eggdrop utility to autogenerate botchk/crontab entries
#
# Copyright (C) 1999-2003 Jeff Fisher (guppy@eggheads.org)
# Copyright (C) 2004-2023 Eggheads Development Team
#
# How to use
# ----------
#
#   Most people begin to use AutoBotchk by moving it from the script
# directory to their Eggdrop directory -- this will save you from having to
# use the -dir option.
#
#   If you run AutoBotchk without any arguments, it will present you with
# a list of valid ones. Most people run AutoBotchk by doing:
#
#     ./autobotchk <config file>
#
#   This will setup crontab to check every 10 minutes to see whether or not
# your bot needs to be restarted and it will e-mail if a restart was
# performed. A lot of people turn off crontab e-mail support; however, I do
# not recommend this since you will be unable to see any errors that might
# happen.
#
# Updates
# -------
#   27Sep2001: added new pidfile setting
#   14Nov2001: removed old autobotchk update entries and updated the help
#              section a little bit. also made autobotchk move down one
#              directory if being run from the scripts directory.
#   15Apr2003: cleaned up a few things, fixed a few bugs, and made a little
#              love! j/k
#   13Dec2016: add possibility to use multiple confs; fixes for (botnet-)nick
#              with len > handlen, for (botnet-)nicks with \[ \] and for
#              $(botnet-)nick used in pidfile, userfile or (botnet-)nick
#   19Apr2017: Fix running this from a non-eggdrop dir.
#   28Nov2023: Added -systemd option, to (duh) create a systemd job

if {$argc == 0} {
  puts "\nusage: $argv0 <eggdrop mainconfig> \[options\] \[additional configs\]"
  puts "Options:"
  puts "--------"
  puts " systemd options:"
  puts "  -systemd (install systemd job instead of cron)"
  puts ""
  puts " crontab options:"
  puts "  -dir     (directory to run autobotchk in)"
  puts "  -noemail (discard crontab e-mails)"
  puts "  -5       (5 minute checks)"
  puts "  -10      (10 minute checks)"
  puts "  -15      (15 minute checks)"
  puts "  -30      (30 minute checks)"
  puts ""
  puts "Additional Configs:"
  puts "-------------------"
  puts "  If you source additional configs from your main config and they"
  puts "  contain either nick, botnet-nick, userfile or pidfile settings,"
  puts "  list them here so that autobotchk can check in them as well."
  puts ""
  exit
}

fconfigure stdout -buffering none

proc newsplit {text {split " "}} {
  upvar $text ours
  append ours $split
  set index [string first $split $ours]
  if {$index == -1} {
    set ours ""
    return ""
  }
  set tmp [string trim [string range $ours 0 $index]]
  set ours [string trim [string range $ours [expr $index + [string length $split]] end]]
  return $tmp
}

puts "\nautobotchk 1.11, (C) 1999-2003 Jeff Fisher (guppy@eggheads.org)"
puts "                   (C) 2004-2022 Eggheads Development Team"
puts "------------------------------------------------------------\n"

set mainconf [newsplit argv]
set confs [list $mainconf]
set dir [pwd]
set delay 10
set email 1
set systemd 0
catch {exec which kill} kill

# If you renamed your eggdrop binary, you should change this variable
set binary "eggdrop"

while {[set opt [newsplit argv]] != ""} {
  switch -- $opt {
    "-systemd" { set systemd 1 }
    "-time" -
    "-1" { set delay 1 }
    "-5" { set delay 5 }
    "-10" { set delay 10 }
    "-15" { set delay 15 }
    "-20" { set delay 20 }
    "-30" { set delay 30 }
    "-nomail" -
    "-noemail" {set email 0}
    "-dir" {
      set dir [newsplit argv]
      if {[string match -* $dir]} {
        puts "*** ERROR: you did not supply a directory name"
        puts ""
        exit
      }
      if {![file isdirectory $dir]} {
        puts "*** ERROR: the directory you supplied is not a directory"
        puts ""
        exit
      }
    }
    default {
      # Treat as extra config file
      if {[file isfile $opt] && [file readable $opt]} { lappend confs $opt }
    }
  }
}

switch -- $delay {
  "30" { set minutes "0,30" }
  "20" { set minutes "0,20,40" }
  "15" { set minutes "0,15,30,45" }
  "5" { set minutes "0,5,10,15,20,25,30,35,40,45,50,55" }
  "1" { set minutes "*" }
  default { set minutes "0,10,20,30,40,50" }
}

if {[string match "*/scripts" $dir]} {
  set dir [string range $dir 0 [expr [string length $dir] - 8]]
}

set dir [string trimright $dir /]

if {![file exists $dir/help] || ![file isdirectory $dir/help]} {
  puts "*** ERROR: are you sure you are running from a bot directory?"
  puts ""
  exit
} elseif {![file exists $dir/$binary]} {
  puts "*** ERROR: are you sure you are running from a bot directory?"
  puts ""
  exit
}

foreach config $confs {
  puts -nonewline "Opening '$config' for processing ... "

  if {[catch {open $dir/$config r} fd]} {
    puts "error:"
    puts "  $fd\n"
    exit
  } else {
    puts "done"
  }

  set count 0
  puts -nonewline "Scanning the config file "

  while {![eof $fd]} {
    incr count
    if {$count == 100} {
      puts -nonewline "."
      set count 0
    }
    set line [gets $fd]
    if {[set blarg [newsplit line]] != "set"} {
      continue
    }
    switch -- [set opt [newsplit line]] {
      "pidfile" -
      "nick" -
      "userfile" -
      "botnet-nick" {
        set $opt [string trim [newsplit line] " \"{}"]
      }
    }
  }
  close $fd

  if {$count != 0} {
    puts -nonewline "."
  }

  puts " done"
}

 if {![info exists {botnet-nick}] && [info exists nick]} {
  puts "  Defaulting \$botnet-nick to \"$nick\""
  set botnet-nick $nick
 }
 if {![info exists {botnet-nick}] || ![info exists userfile]} {
  puts "  *** ERROR: could not find either \$userfile or \$botnet-nick"
  puts ""
  puts "  Are you sure this is a valid eggdrop config file?"
  puts ""
  exit
 }
 catch {exec "$dir/$binary" -v} execres
 if {![regexp {handlen=([0-9]+)} "$execres" -> handlen]} {
  puts "  Could not find handlen used, defaulting to 32."
  # len 32 means up to index 31
  set handlen 31
 } else {
  set handlen [expr $handlen - 1]
 }
 set nick [string range [subst -nocommands $nick] 0 $handlen]
 set botnet-nick [string range [subst -nocommands ${botnet-nick}] 0 $handlen]

### systemd stuff
if {$systemd} {
 puts "Enabling user lingering..."
 if {[catch {exec loginctl enable-linger} res]} {
  puts "Oops, something went wrong. Is systemd running on this system?"
  exit
 }
 puts "Creating systemd directory..."
 catch {file mkdir ~/.config/systemd/user } res
 if {[catch {open ~/.config/systemd/user/${botnet-nick}.service w} fd]} {
  puts "  *** ERROR: unable to open '${botnet-nick}.service' for writing"
  puts ""
  exit
 }
 puts $fd "### Eggdrop systemd unit, generated by autosystemd"
 puts $fd ""
 puts $fd "\[Unit\]"
 puts $fd "Description=${botnet-nick} (Eggdrop)"
 puts $fd "After=default.target"
 puts $fd ""
 puts $fd "\[Service\]"
 puts $fd "WorkingDirectory=${dir}"
 puts $fd "ExecStart=${dir}/eggdrop ${config}"
 puts $fd "ExecReload=${kill} -s HUP \$MAINPID"
 puts $fd "Type=forking"
 puts $fd "Restart=on-abnormal"
 puts $fd ""
 puts $fd "\[Install\]"
 puts $fd "WantedBy=default.target"
 close $fd

 catch {exec systemctl --user enable ${botnet-nick}.service} res
 puts $res
 puts "systemd job successfully installed as '${botnet-nick}.service'."
 puts "* Use 'systemctl --user <start|stop|restart|reload|enable|disable> ${botnet-nick}.service' to control your Eggdrop"
 puts "Starting Eggdrop..."
 if {[catch {exec systemctl --user start ${botnet-nick}.service} res]} {
  puts "ERROR: Eggdrop did not start."
  puts $res
 } else {
  puts "Success."
 }
 exit
}


if {![info exists pidfile]} {
 puts "  Defaulting \$pidfile to \"pid.${botnet-nick}\""
 set pidfile "pid.${botnet-nick}"
}
set pidfile [subst -nocommands $pidfile]
if {[catch {open $dir/${botnet-nick}.botchk w} fd]} {
 puts "  *** ERROR: unable to open '${botnet-nick}.botchk' for writing"
 puts ""
 exit
}
puts $fd "#! /bin/sh
#
# ${botnet-nick}.botchk (generated on [clock format [clock seconds] -format "%B %d, %Y @ %I:%M%p"])
#
# Generated by AutoBotchk 1.11
# Copyright (C) 1999-2003 Jeff Fisher (guppy@eggheads.org)
# Copyright (C) 2004-2023 Eggheads Development Team
#

# change this to the directory you run your bot from:
botdir=\"$dir\"

# change this to the name of your bot's script in that directory:
botscript=\"$binary $mainconf\"

# change this to the nickname of your bot (capitalization COUNTS)
botname=\"${botnet-nick}\"

# change this to the name of your bot's userfile (capitalization COUNTS)
userfile=\"$userfile\"

# change this to the name of your bot's pidfile (capitalization COUNTS)
pidfile=\"$pidfile\"

########## you probably don't need to change anything below here ##########

cd \$botdir

# is there a pid file?
if test -r \$pidfile
then
  # there is a pid file -- is it current?
  botpid=`cat \$pidfile`
  if `kill -CHLD \$botpid >/dev/null 2>&1`
  then
    # it's still going -- back out quietly
    exit 0
  fi
  echo \"\"
  echo \"Stale \$pidfile file, erasing...\"
  rm -f \$pidfile
fi

if test -r CANTSTART.\$botname
then
  if test -r \$userfile || test -r \$userfile~new || test -r \$userfile~bak
  then
    echo \"\"
    echo \"Userfile found, removing check file 'CANTSTART.\$botname'...\"
    rm -f CANTSTART.\$botname
  fi
fi

# test if we have run botchk previously and didn't find a userfile
if test ! -f CANTSTART.\$botname
then
  echo \"\"
  echo \"Couldn't find bot '\$botname' running, reloading...\"
  echo \"\"
  # check for userfile and reload bot if found
  if test -r \$userfile
  then
    # It's there, load the bot
    ./\$botscript
    exit 0
  else
    if test -r \$userfile~new
    then
      # Bot f*@!ed up while saving the userfile last time.  Move it over.
      echo \"Userfile missing.  Using last saved userfile...\"
      mv -f \$userfile~new \$userfile
      ./\$botscript
      exit 0
    else
      if test -r \$userfile~bak
      then
        # Userfile is missing, use backup userfile.
        echo \"Userfile missing.  Using backup userfile...\"
        cp -f \$userfile~bak \$userfile
        ./\$botscript
        exit 0
      else
        # Well, nothing to work with...
        echo \"No userfile.  Could not reload the bot...\"
        echo \"no userfile\" > CANTSTART.\$botname
        exit 1
      fi
    fi
  fi
fi

exit 0
 "
close $fd
puts "Wrote '${botnet-nick}.botchk' successfully ([file size $dir/${botnet-nick}.botchk] bytes)"
if {[catch {exec chmod u+x $dir/${botnet-nick}.botchk} 0]} {
 puts "  *** ERROR: unable to 'chmod u+x' the output file"
 puts ""
 exit
}
puts -nonewline "Scanning crontab entries ... "

set tmp ".autobotchk[clock clicks].[pid]"
set cronbotchk [string map {\\ \\\\ \[ \\\[ \] \\\]} "${botnet-nick}.botchk"]
if {$email} {
  set line "$minutes \* \* \* \* $dir/${cronbotchk}"
} {
  set line "$minutes \* \* \* \* $dir/${cronbotchk} >\/dev\/null 2>&1"
}

if {[catch {exec crontab -l > $tmp} error ]} {
  if {![string match "*no*cron*" [string tolower $error]] &&
      ![string match "*can't open*" [string tolower $error]]} {
    catch {file delete -force $tmp} 0
    puts "error: unable to get crontab listing"
    puts ""
    puts $error
    puts ""
    exit
  }
}

set cronbotchk [string map {\\ \\\\ \[ \\\[ \] \\\]} "${cronbotchk}"]
set fd [open $tmp r]
while {![eof $fd]} {
  set z [gets $fd]
  if {[string match "*$dir/${cronbotchk}*" $z] ||
      [string match "*$dir//${cronbotchk}*" $z]} {
    puts "found an existing entry, we're done now"
    puts ""
    exit
  }
}

close $fd

puts "done"

puts -nonewline "Adding the new crontab entry ... "
set fd [open $tmp a]
puts $fd $line
close $fd

if {[catch {exec crontab $tmp} error]} {
  puts "error: unable to do 'crontab $tmp'"
  puts ""
  puts $error
  puts ""
  exit
} else {
  catch {file delete -force $tmp} 0
}

puts "done"
puts ""
puts "Use 'crontab -l' to view all your current crontab entries"
puts "    'crontab -r' to remove all your crontab entries"
puts ""