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jvscode [[at]] fastmail [[dot]] fm

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42 total

Sorting arrays in Bash

to sort shell osx mac bash unix array by jv on Aug 06, 2008

export PATH="$(/usr/sbin/sysctl -n user.cs_path)"

export IFS=$'\n'
#export IFS=$' \t\n'

ar1=('g h c' abc def 123)
ar2=('1 2 3' ABC ghc DEF)
ar3=('-x' '! & ?' $'a test\nsentence' $'another test\nsentence\n.' a64bitapp a32bitapp)

printf "%s\n" "${#ar1[@]}" "${#ar2[@]}" "${#ar3[@]}"  


# ar3
for ((i=0; i < "${#ar3[@]}"; i++)); do echo "${ar3[$i]}"; done | sort | nl
for ((i=0; i < "${#ar3[@]}"; i++)); do echo ${ar3[$i]}; done | sort | nl
for ((i=0; i < "${#ar3[@]}"; i++)); do echo "${ar3[$i]}" | ruby -0777 -n -e 'p $_.to_s'; done | nl
for ((i=0; i < "${#ar3[@]}"; i++)); do printf -- "${ar3[$i]}\n" | ruby -0777 -n -e 'p $_.to_s'; done | nl


# sort a single array
ar3sorted=( $(for ((i=0; i < "${#ar3[@]}"; i++)); do echo ${ar3[$i]}; done | sort) )
for ((i=0; i < "${#ar3sorted[@]}"; i++)); do echo "${ar3sorted[$i]}" | ruby -0777 -n -e 'p $_.to_s'; done | nl
for ((i=0; i < "${#ar3sorted[@]}"; i++)); do printf "%s\n" "${ar3sorted[$i]}" | ruby -0777 -n -e 'p $_.to_s'; done | nl


# adding \000\n as array item delimiter
printf "%s\000\n" "${ar3[@]}"  | sed -n -e 'l'
printf "%s\000\n" "${ar3[@]}"  | ruby -n -e 'p $_.to_s'
printf "%s\000\n" "${ar3[@]}"  | ruby -0777 -n -e 'p $_.to_s'
printf "%s\000\n" "${ar3[@]}" | sed -e :a -e '$!N; s/\n/NEWLINE/g; ta' | ruby -n -e 'p $_.to_s'
printf "%s\000\n" "${ar3[@]}" | sed -e :a -e '$!N; s/\n/NEWLINE/g; ta' | tr '\000' '\n' | sed -e 's/^NEWLINE//' | ruby -n -e 'p $_.to_s'


ar3sorted=( $(printf "%s\000\n" "${ar3[@]}" | sed -e :a -e '$!N; s/\n/NEWLINE/g; ta' | tr '\000' '\n' | sed -e 's/^NEWLINE//' | sort) )
for ((i=0; i < "${#ar3sorted[@]}"; i++)); do printf -- "${ar3sorted[$i]//NEWLINE/\n}" | ruby -0777 -n -e 'p $_.to_s'; done | nl


# sort multiple arrays; convert embedded newline characters into single spaces
ar4=( $(printf "%s\n\000" "${ar1[@]}" "${ar2[@]}" "${ar3[@]}" | tr '\n' ' ' | tr '\000' '\n' | sort) )

# sort multiple arrays; preserve embedded newline characters as NEWLINE
ar4=( $(printf "%s\000\n" "${ar1[@]}" "${ar2[@]}" "${ar3[@]}" | sed -e :a -e '$!N; s/\n/NEWLINE/g; ta' | tr '\000' '\n' | sed -e 's/^NEWLINE//' | sort) )


printf "%s\n" "${#ar4[@]}"  
printf "%s\n" "${ar4[@]}" | nl  

for ((i=0; i < "${#ar4[@]}"; i++)); do echo ${ar4[$i]//NEWLINE/\\n}; done | nl
for ((i=0; i < "${#ar4[@]}"; i++)); do echo -e ${ar4[$i]//NEWLINE/\\n}; done | nl
for ((i=0; i < "${#ar4[@]}"; i++)); do printf -- ${ar4[$i]//NEWLINE/\\n}"\n"; done | nl
for ((i=0; i < "${#ar4[@]}"; i++)); do printf -- "${ar4[$i]//NEWLINE/\n}\n"; done | nl
for ((i=0; i < "${#ar4[@]}"; i++)); do printf "%s\n" ${ar4[$i]//NEWLINE/\\n}; done | nl
for ((i=0; i < "${#ar4[@]}"; i++)); do printf -- "${ar4[$i]//NEWLINE/\n}\n" | ruby -0777 -n -e 'p $_.to_s'; done | nl
for ((i=0; i < "${#ar4[@]}"; i++)); do printf "%s\n" "${ar4[$i]//NEWLINE/\n}" | ruby -0777 -n -e 'p $_.to_s'; done | nl

Switch to the login window from the command line

to shell osx mac bash unix window login screen access lock keychain by jv on Aug 04, 2008

# cf. http://www.mactipper.com/2008/07/securely-lock-your-mac-system.html,
# http://www.macosxhints.com/article.php?story=20040724203315798 and
# http://www.apple.com/downloads/macosx/automator/lockdesktop.html

/System/Library/CoreServices/"Menu Extras"/User.menu/Contents/Resources/CGSession -suspend

/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -switchToUserID username


alias lo='/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend'

# <ctrl> + l
help bind
bind -P | grep -i c-l
bind -x '"\C-l"':'/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend'

# <esc> + l
#bind -x '"\M-l"':'/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend'
bind -x '"\el"':'/System/Library/CoreServices/Menu\ Extras/User.menu/Contents/Resources/CGSession -suspend'


#---------------------------------------------


open -a 'Keychain Access'

# go to  Keychain Access > Preferences ... > General > activate "Show Status in Menu Bar" 
# now you can use "Lock Screen" via the Keychain Access menu bar item

Password request dialog from the command line with AppleScript

to password shell osx mac bash unix applescript dialog by jv on Jul 23, 2008

unset -v input

#input="$(/usr/bin/osascript <<-'__HEREDOC__'
input="$(/usr/bin/osascript 2>/dev/null <<-'__HEREDOC__'
   with timeout of 300 seconds
      tell application "Finder"
--      tell application "System Events"
         activate
         set Input to display dialog "Please enter your password:" \
            with title "Password" \
            with icon caution \
            default answer "" \
            buttons {"Cancel", "OK"} \
            default button 2 \
            with hidden answer \
            giving up after 295
         return text returned of Input as string
      end tell
   end timeout
__HEREDOC__
)"

printf "%s\n" "${input}"


open -a 'Script Editor'

# copy & paste the following snippet into Script Editor 

with timeout of 300 seconds
	tell application "Finder"
		activate
		set Input to display dialog "Please enter your password:" with title "Password" with icon caution default answer "" buttons {"Cancel", "OK"} default button 2 giving up after 295 with hidden answer
		return text returned of Input as string
	end tell
end timeout


#---------------------------------------


unset -v input name
#export name="$(/usr/bin/logname)"
export name="$(/usr/bin/whoami)"

input="$(/usr/bin/osascript 2>/dev/null <<-__HEREDOC__
   with timeout of 300 seconds
      tell application "Finder"
--      tell application "System Events"
         activate
         set my_name to "${name}"
         set my_pass to display dialog "Enter password for " & quoted form of my_name \
            with title "Login Window" \
            with icon note \
            default answer "" \
            buttons {"Cancel", "OK"} \
            default button 2 \
            with hidden answer \
            giving up after 295
            return text returned of my_pass as string
      end tell
   end timeout
__HEREDOC__
)"


printf "%s\n" "${input}"

Login window from the command line with Pashua

to password shell osx mac bash unix window login utf8 UTF-8 pashua dialog by jv on Jul 22, 2008

export PATH="/usr/bin:/bin:/usr/sbin:/sbin"
export IFS=$' \t\n'

mkdir -p ~/Applications

ls -ld ~/Applications
stat -x ~/Applications

cd ~/Applications
curl -L -O http://www.bluem.net/files/Pashua.dmg
hdiutil mount Pashua.dmg
cp -R /Volumes/Pashua ~/Applications/Pashua
hdiutil unmount /Volumes/Pashua

cd ~/Applications/Pashua/Examples
cp -p example.sh example.sh.orig   # backup


# some in-place text editing commands to modify ~/Applications/Pashua/Examples/example.sh
# cf. http://bash-hackers.org/wiki/doku.php?id=howto:edit-ed

export FILE="${HOME}/Applications/Pashua/Examples/example.sh"

# replace #!/bin/sh with #!/bin/bash
/bin/ed -s "${FILE}" <<< $'1,1s|bin/sh|bin/bash|\nw'

# to set the encoding to UTF-8 we add: set -- test utf8
/bin/ed -s "${FILE}" <<< $',s|\(.*Manage encoding.*\)|set -- test utf8 # set $2 to "utf8"\\\n\\\n\\1|\nw'

# delete all lines after first regex match /conf="/
/bin/ed -s "${FILE}" <<< $'/conf="/;$d\nw'


# add the following configuration

/bin/cat >> "${FILE}" <<-'EOF'

conf="

# Set transparency: 0 is transparent, 1 is opaque
*.transparency=0.95

# Set window title
*.title = Login Window

*.x = 550
*.y = 300
*.autoclosetime = 300

name.type = textfield
name.label = Please enter your name:
name.width = 280
name.x = 0
name.y = 110

password.type = password
password.label = Please enter your password:
password.width = 280
password.x = 0          
password.y = 45        

# Add a cancel button with default label
cb.type = cancelbutton

";   # end conf


pashua_run "$conf"
#pashua_run "$conf" "utf8"   # alternative to "set -- test utf8" above


if [[ ${cb} -ne 0 ]]; then echo 'Login cancelled!'; exit 1; fi

printf "%s\n" "name = ${name}"

printf "%s\n" "${name}" | ruby -n -e 'p $_.to_s'

# the following command requires #!/bin/bash
# cf. http://www.lugbz.org/pipermail/lugbz-list/2006-December/016360.html
/bin/ed -s <((printf "%s\n" "${name}")) <<< $',l'   

printf "%s\n" "password = ${password}"
printf "%s\n" "cb = ${cb}"

#printf "%s\n" "${password}" | /usr/bin/sudo -S /bin/ls | /usr/bin/head -n 5

/sbin/md5 -qs "${password}"

EOF


# run the script
~/Applications/Pashua/Examples/example.sh

mycmds

to awk shell osx mac bash bashrc unix debug profile escape alias by jv on Jul 22, 2008

help set
set -xv

#echo $-
#shopt -u
#shopt -s
#shopt -s | grep expand_aliases
#shopt -q expand_aliases; echo $?
#help shopt
#shopt -p
#shopt -s expand_aliases   

unalias mycmds1 mycmds2 mycmds3  2>/dev/null
alias mycmds1="declare -F | /usr/bin/awk '{print \$NF}' | /usr/bin/sort"
alias mycmds2="declare -F | /usr/bin/awk '{print $NF}' | /usr/bin/sort"
alias mycmds3='declare -F | /usr/bin/awk "{print $NF}" | /usr/bin/sort'

mycmds1
mycmds2
mycmds3


alias mycmds="alias -p | /usr/bin/awk -F= '{print \$1}' | /usr/bin/sort; \
              declare -F | /usr/bin/awk '{print \$NF }' | /usr/bin/sort"

mycmds

ANSI terminal color chart

to shell osx mac bash unix code color escape ansi chart by jv on Jun 02, 2008

#!/bin/bash
#
#   This file echoes a bunch of color codes to the 
#   terminal to demonstrate what's available.  Each 
#   line is the color code of one forground color,
#   out of 17 (default + 16 escapes), followed by a 
#   test use of that color on all nine background 
#   colors (default + 8 escapes).
#
#   Author: Giles Orr
#   URL: http://gilesorr.com/bashprompt/howto/c350.html
#   License: GNU Free Documentation License, Version 1.1 or any later version published by the Free Software Foundation;
#            http://gilesorr.com/bashprompt/howto/a1004.html


T='gYw'   # The test text

echo -e "\n                 40m     41m     42m     43m\
     44m     45m     46m     47m";

for FGs in '    m' '   1m' '  30m' '1;30m' '  31m' '1;31m' '  32m' \
           '1;32m' '  33m' '1;33m' '  34m' '1;34m' '  35m' '1;35m' \
           '  36m' '1;36m' '  37m' '1;37m';
  do FG=${FGs// /}
  echo -en " $FGs \033[$FG  $T  "
  for BG in 40m 41m 42m 43m 44m 45m 46m 47m;
    do echo -en "$EINS \033[$FG\033[$BG  $T  \033[0m";
  done
  echo;
done
echo

#!/bin/sh
#
#  colors v1.03
#
#  A simple shell script to output an ANSI terminal color chart.
#  It may be useful when trying to customize your ANSI terminal
#  color scheme!
#
#  Written and placed in the public domain by Ian Abbott <ian@abbott.org>
#
#  ANSI terminal color chart generator
#  Author: Ian Abbott
#  License: BSD License, http://www.opensource.org/licenses/bsd-license.php
#  URL: http://www.snippetcenter.org/de/ansi-terminal-color-chart-generator-s1346.aspx

for h in 0 1; do
  echo -e "\\033[0;${h}m\\c"
  case $h in
  0) echo -e "Normal\\c" ;;
  1) echo -e "High\\c" ;;
  esac
  echo -e " intensity foreground (background color in parentheses)\\033[m"
  for f in 0 1 2 3 4 5 6 7; do
    for b in 0 1 2 3 4 5 6 7 8; do
      echo -e "\\033[${h};3${f}\\c"
      if [ $b -lt 8 ]; then
        echo -e ";4${b}m\\c"
      else
        echo -e "m\\c"
      fi
      case $f in
      0) echo -e " BLACK \\c" ;;
      1) echo -e "  RED  \\c" ;;
      2) echo -e " GREEN \\c" ;;
      3) echo -e " YELLOW\\c" ;;
      4) echo -e "  BLUE \\c" ;;
      5) echo -e "MAGENTA\\c" ;;
      6) echo -e "  CYAN \\c" ;;
      7) echo -e " WHITE \\c" ;;
      esac
      case $b in
      8) echo -e "\\033[m" ;;
      *) echo -e " \\033[m \\c" ;;
      esac
    done
  done
  echo -e "\\033[${h}m\\c"
  for b in 0 1 2 3 4 5 6 7 8; do
    case $b in
    0) echo -e "(black)  \\c" ;;
    1) echo -e " (red)   \\c" ;;
    2) echo -e "(green)  \\c" ;;
    3) echo -e "(yellow) \\c" ;;
    4) echo -e " (blue)  \\c" ;;
    5) echo -e "(magenta)\\c" ;;
    6) echo -e " (cyan)  \\c" ;;
    7) echo -e "(white)  \\c" ;;
    8) echo -e " (none)\\c" ;;
    esac
  done
  echo -e "\\033[m\\n"
done

Terminal window commands

to shell osx mac bash unix code osascript text window terminal color title bar escape background ansi by jv on Jun 01, 2008

# Inspired by: 
# - Re-size and Move with Escape Sequences, http://www.osxfaq.com/tips/unix-tricks/week99/monday.ws
# - Define Aliases and Functions, http://www.osxfaq.com/tips/unix-tricks/week99/tuesday.ws
# - Focus and Dock with Escape Sequences, http://www.osxfaq.com/Tips/unix-tricks/week99/wednesday.ws
# Author: Adrian Mayo, http://101.1dot1.com and http://www.peachpit.com/title/0321374118
# also see: http://en.wikipedia.org/wiki/ANSI_escape_code

function title() { if [[ $# -eq 1 && -n "$@" ]]; then printf "\e]0;${@}\a"; fi; return 0; }  
function title() { if [[ -n "$@" ]]; then printf "\033]0;${1}\007"; fi; return 0; }
function docktw() { printf "\e[2t"; return 0; }
function docktw() { printf "\e[2t"; sleep 5; printf "\e[5t"; return 0; }
function bgtw() { printf "\e[6t"; return 0; }
function bgtw() { printf "\e[6t"; sleep 5; printf "\e[5t"; return 0; }    # background the Terminal window

title 'Hello, world!'
docktw
bgtw


# positive integer test (including zero)
function positive_int() { return $(test "$@" -eq "$@" > /dev/null 2>&1 && test "$@" -ge 0 > /dev/null 2>&1); }

# move the Terminal window
function mvtw() { 
   if [[ $# -eq 2 ]] && $(positive_int "$1") && $(positive_int "$2"); then 
      printf "\e[3;${1};${2};t"
      return 0
   fi
   return 1
}


# resize the Terminal window
function sizetw() { 
   if [[ $# -eq 2 ]] && $(positive_int "$1") && $(positive_int "$2"); then 
      printf "\e[8;${1};${2};t"
      /usr/bin/clear
      return 0
   fi
   return 1
}


# full screen
function fscreen() { printf "\e[3;0;0;t\e[8;0;0t"; /usr/bin/clear; return 0; }

# default screen
function dscreen() { printf "\e[8;35;150;t"; printf "\e[3;300;240;t"; /usr/bin/clear; return 0; }

# max columns
function maxc() { printf "\e[3;0;0;t\e[8;50;0t"; /usr/bin/clear; return 0; }

# max rows
function maxr() { printf "\e[3;0;0;t\e[8;0;100t"; /usr/bin/clear; return 0; }

# show number of lines & columns
function lc() { printf "lines: $(/usr/bin/tput lines)\ncolums: $(/usr/bin/tput cols)\n"; return 0; }

# move cursor
function mvc() { 
   if [[ $# -eq 2 ]] && $(positive_int "$1") && $(positive_int "$2"); then 
      /usr/bin/tput cup "$1" "$2"
      /usr/bin/tput el  # clear to end of line
      #/usr/bin/tput ed
      return 0
   fi
   return 1

}


# wrap lines according to the number of columns of the Terminal window
function wraptw() { 
   declare str var=$(/usr/bin/tput cols)
   if [[ -s /dev/stdin ]]; then str="$(</dev/stdin)"; else str="$@"; fi 
   printf "%s\n" "$str" | /usr/bin/fmt -w $var
   #printf "%s\n" "$str" | /usr/bin/fold -w $(/usr/bin/tput cols)
   return 0
}


long_line="$(/usr/bin/jot -b 'This is a test sentence!' 100 | /usr/bin/tr '\n' ' ')"
printf "%s\n" "$long_line" | wraptw

lc
mvtw 0 0
mvtw 0 300
mvtw 300 300
mvtw 80 140
fscreen
dscreen
maxc
maxr

lc
sizetw 0 0
sizetw 0 50
sizetw 1 50
sizetw 50 50
sizetw 50 500
sizetw 50 150

mvc 2 45
mvc 100 23
mvc 99 3

dscreen


#-----------------------------------------------------


# customize the Terminal window's title bar text

# show the current date as title bar text
declare -x PROMPT_COMMAND='printf "\e]0; $(/bin/date)\a"'   
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/date "+%a %b %e   %H:%M:%S ")\a"'
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/date "+%Y-%m-%d   %H:%M:%S ")\a"'

# show current working directory 
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/pwd) \a"'
declare -x PROMPT_COMMAND='printf "\e]0;$(/bin/pwd | /usr/bin/tr -d "[[:cntrl:]]") \a"'

# show OLDPWD 
declare -x PROMPT_COMMAND='printf "\e]0;$(printf %s "$OLDPWD") \a"'
declare -x PROMPT_COMMAND='printf "\e]0;$(printf %s "$OLDPWD" | /usr/bin/cut -c 1-100) \a"'

export -p | grep -i PROMPT_COMMAND
env | grep -i PROMPT_COMMAND
unset -v PROMPT_COMMAND


# first create environment variable TITLE 
# cf. Prompt Commands, http://www.osxfaq.com/Tips/unix-tricks/week71/wednesday.ws
# Author: Adrian Mayo, http://101.1dot1.com and http://www.peachpit.com/title/0321374118

unset -v TITLE PROMPT_COMMAND
declare -x TITLE="Terminal"
declare -x PROMPT_COMMAND='printf "\e]0;${TITLE}\a"'

# message as title bar text
function message_title() { 
   if [[ $# -eq 1 && -n "$@" ]]; then 
      #TITLE="$@"
      TITLE="$(printf %s "$@" | /usr/bin/cut -c 1-100)"
   fi
   return 0
}

export -f message_title
export -p | grep -i message_title
env | grep -i message_title
#unset -f message_title 

message_title 'Hello, world!'


# show OS information in title bar
function osinfo() { 
   x1="$(/usr/bin/sw_vers -productName)"
   x2="$(/usr/bin/sw_vers -productVersion)"
   x3="$(/usr/bin/sw_vers -buildVersion)"
   x4="$(/usr/bin/arch)"
   TITLE="${x1} - ${x2} - ${x3} - ${x4}"
   return 0
}

export -f osinfo
osinfo


function eval_title() { 
   if [[ -n "$(printf %s "$@") | /usr/bin/egrep '^date|whoami|logname|uname|machine|pwd|hostname$'" ]]; then 
      cmd_output="$(eval "$@")"
      TITLE="$cmd_output"
   fi
   return 0
}
export -f eval_title

eval_title "date"
eval_title "whoami"
eval_title "logname"
eval_title "uname"
eval_title "machine"
eval_title "pwd"
eval_title "hostname"


function date_title() { TITLE="$(/bin/date "+%Y-%m-%d")"; return 0; }
export -f date_title
date_title

function logname_title() { TITLE="$(/usr/bin/logname)"; return 0; }
export -f logname_title
logname_title


# show last command in title bar
help fc
unset -v TITLE PROMPT_COMMAND
declare -x PROMPT_COMMAND='printf %b "\e]0;$(fc -ln | tail -n 1 | cut -c 2-150 | tr -d "\\")\a"'


# show current command in title bar
help history
unset -v TITLE PROMPT_COMMAND
declare -x PROMPT_COMMAND='printf %b "\e]0;$(history 1 | /usr/bin/cut -c 8-150 | tr -d "\\")\a"'
declare -x PROMPT_COMMAND='printf %b "\e]0;$(history 1 | sed -E "s/^[[:space:]]*[[:digit:]]+[[:space:]]+(.*)$/\\1/" | cut -c 1-150 | tr -d "\\")\a"'


#-----------------------------------------------------


# increase font size
function ifont() { 
/usr/bin/osascript <<__END__
    tell application "System Events" to tell process "Terminal" to keystroke "+" using command down
__END__
  return 0 
}

ifont


# decrease font size
function dfont() { 
/usr/bin/osascript <<__END__
    tell application "System Events" to tell process "Terminal" to keystroke "-" using command down
__END__
  return 0 
}

dfont


# hide all Terminal windows
function hideall() { 
   /usr/bin/osascript -e 'tell application "System Events" to set visible of some item of ( get processes whose name = "Terminal" ) to false'
   return 0
}

hideall


# create a new Terminal window and cd to the same current working directory
# cf. http://justinfrench.com/index.php?id=231

unset -f newin

function newin() {
   /bin/pwd | /usr/bin/pbcopy
   /usr/bin/open -a Terminal
   /usr/bin/osascript -e 'tell application "Terminal" to do script with command "cd \"$(/usr/bin/pbpaste)\"; echo \" \" | /usr/bin/pbcopy; /usr/bin/clear"'
   return 0 
}

cd ~/Desktop
newin

Screensaver as desktop background

to shell osx mac bash unix desktop background screensaver by jv on Jun 01, 2008

# cf. http://digg.com/apple/Top_15_Terminal_Commands_for_Hidden_Mac_OS_X_Settings

function sadb() {
# cf. /usr/bin/locate '*ScreenSaverEngine'
/usr/bin/screen -d -m /System/Library/Frameworks/ScreenSaver.framework/Resources/ScreenSaverEngine.app/Contents/MacOS/ScreenSaverEngine -background 
return 0
}

function sadb_stop() {
#/usr/bin/killall -d ScreenSaverEngine
#/usr/bin/killall -v ScreenSaverEngine
/usr/bin/killall -HUP ScreenSaverEngine
return 0
}

sadb
sleep 30
sadb_stop

Flushing routing tables on Mac OS X

to shell osx mac bash unix network table flush route by jv on May 14, 2008

# cf. http://ola-bini.blogspot.com/2008/05/faulty-routes-on-macos-x.html
/usr/bin/sudo /sbin/route flush

Using PlistBuddy to customize syslogd

to shell osx mac launchd bash unix defaults launchctl plistbuddy syslogd plist by jv on May 14, 2008


# Inspired by: http://www.maciverse.com/the-case-of-the-slow-mac-and-how-to-fix-it.html

# cf. man syslog, man syslogd and http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/syslogd.8.html
/usr/bin/open -a Console   # system.log
/usr/bin/tail -n 50 /private/var/log/system.log

help declare
declare -x sudo=/usr/bin/sudo plistbuddy=/usr/libexec/PlistBuddy defaults=/usr/bin/defaults
/usr/bin/env | /usr/bin/grep -E 'sudo=|plistbuddy=|defaults='

# create a symbolic link (on Mac OS X 10.4)
help test
/usr/bin/locate PlistBuddy
if [[ ! -e /usr/libexec/PlistBuddy ]]; then $sudo /bin/ln -s "/Library/Receipts/AdditionalEssentials.pkg/Contents/Resources/PlistBuddy" /usr/libexec/PlistBuddy; fi

# make a backup
$sudo /bin/cp -p /System/Library/LaunchDaemons/com.apple.syslogd.plist /System/Library/LaunchDaemons/com.apple.syslogd.plist.orig

# cf. http://developer.apple.com/documentation/Darwin/Reference/ManPages/man8/PlistBuddy.8.html
$plistbuddy -h   

$plistbuddy -c Print /System/Library/LaunchDaemons/com.apple.syslogd.plist
$plistbuddy -c "Print :ProgramArguments" /System/Library/LaunchDaemons/com.apple.syslogd.plist

# compare
$defaults read /System/Library/LaunchDaemons/com.apple.syslogd
$defaults read /System/Library/LaunchDaemons/com.apple.syslogd ProgramArguments

$sudo /usr/bin/nano /System/Library/LaunchDaemons/com.apple.syslogd.plist

$sudo $plistbuddy -c "Delete :ProgramArguments" /System/Library/LaunchDaemons/com.apple.syslogd.plist
$sudo $plistbuddy -c "Add :ProgramArguments array" /System/Library/LaunchDaemons/com.apple.syslogd.plist
$sudo $plistbuddy -c "Add :ProgramArguments:0 string '/usr/sbin/syslogd'" /System/Library/LaunchDaemons/com.apple.syslogd.plist
$sudo $plistbuddy -c "Add :ProgramArguments:1 string '-c'" /System/Library/LaunchDaemons/com.apple.syslogd.plist
$sudo $plistbuddy -c "Add :ProgramArguments:2 integer 3" /System/Library/LaunchDaemons/com.apple.syslogd.plist

# Mac OS X 10.5
#$sudo $plistbuddy -c "Add :ProgramArguments:3 string '-a'" /System/Library/LaunchDaemons/com.apple.syslogd.plist
#$sudo $plistbuddy -c "Add :ProgramArguments:4 string '-db_max'" /System/Library/LaunchDaemons/com.apple.syslogd.plist
#$sudo $plistbuddy -c "Add :ProgramArguments:5 integer 5000000" /System/Library/LaunchDaemons/com.apple.syslogd.plist

$plistbuddy -c "Print :ProgramArguments" /System/Library/LaunchDaemons/com.apple.syslogd.plist
$defaults read /System/Library/LaunchDaemons/com.apple.syslogd ProgramArguments
$sudo /usr/bin/nano /System/Library/LaunchDaemons/com.apple.syslogd.plist

# reset com.apple.syslogd.plist
#if [[ -n $(/usr/bin/sw_vers -productVersion | /usr/bin/grep '^10.5') ]]; then exit; fi   # exit if on Mac OS X 10.5.x
$sudo /bin/rm -f /System/Library/LaunchDaemons/com.apple.syslogd.plist
$sudo /bin/cp -p /System/Library/LaunchDaemons/com.apple.syslogd.plist.orig /System/Library/LaunchDaemons/com.apple.syslogd.plist

$sudo /usr/bin/nano /System/Library/LaunchDaemons/com.apple.syslogd.plist

# restart syslogd
#$sudo /bin/launchctl unload -w /System/Library/LaunchDaemons/com.apple.syslogd.plist 2>/dev/null
#/bin/sleep 3
#$sudo /bin/launchctl load -w /System/Library/LaunchDaemons/com.apple.syslogd.plist 2>/dev/null
#$sudo /usr/bin/killall -HUP syslogd   # alternative

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