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

/usr/bin/sudo /bin/mkdir -p /usr/local/bin
/usr/bin/sudo /usr/sbin/chown root:wheel /usr/local /usr/local/bin
/usr/bin/sudo /bin/chmod 0755 /usr/local /usr/local/bin

ls -ld /usr/local /usr/local/bin

man killall | less -p 'Show only'
help kill

# cf. also http://sial.org/howto/shell/kill-9/ and
# http://sial.org/blog/2006/10/kill_only_if_not_already_dead.html
man signal | less -p 'Default Action'
man sigaction | less -p 'Default Action'
man kill | less -p 'commonly used signals'

kill -l
kill -l 1 2 3 15

help type
type -t kill killall
type -a kill killall

# the -s option just triggers a fake kill
killall -s Finder
killall -s -HUP Finder
killall -s -9 Finder
killall -s -3 Finder


# cf. http://bashcurescancer.com/using-kill-to-see-if-a-process-is-alive.html
open -a 'Activity Monitor'
killall -s Terminal
kill -0 3832 &>/dev/null; echo $?           # no process with ID 3832 running if exit status is 1
kill -0 $(killall -s Terminal | awk '{print $NF}') &>/dev/null; echo $?     # Terminal is alive
kill -0 $PPID &>/dev/null; echo $?          # Bash is alive


# kpid - get PID using killall -s

/bin/cat > ~/Desktop/kpid <<-'EOF'
#!/bin/sh

declare kpid rc

kpid=$(/usr/bin/killall -s -u $(/usr/bin/id -u) "${@}" 2>/dev/null)
rc=$?

if [[ $rc -eq 0 ]]; then
   printf "%s" "$kpid" | awk '{print $NF}'
else
   exit 1
fi

exit  0

EOF


/usr/bin/sudo /bin/mv -i ~/Desktop/kpid /usr/local/bin
/usr/bin/sudo /usr/sbin/chown root:wheel /usr/local/bin/kpid
/usr/bin/sudo /bin/chmod 0755 /usr/local/bin/kpid
/usr/bin/sudo /usr/bin/nano /usr/local/bin/kpid

open -a 'Activity Monitor'

kpid Finder
kpid Safari
kpid Dock
kpid TextEdit
kpid 'QuickTime Player'

kpid launchd
/usr/bin/sudo pid launchd

kpid cupsd; echo $?
/usr/bin/sudo kpid cupsd

kpid bash
/usr/bin/sudo kpid bash; echo $?

# kill Bash
#echo $PPID
#kill -HUP  $PPID
#kill -KILL $PPID


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


man ps
ps -L | tr ' ' '\n'


# pspid - get PID using ps

/bin/cat > ~/Desktop/pspid <<-'EOF'
#!/bin/sh

declare pspid

if [[ "$1" = "-l" ]]; then

   #if [[ $# -eq 1 ]]; then /bin/ps -r -axco pid,command; exit 0; fi
   #if [[ $# -eq 1 ]]; then /bin/ps -axco pid,command | /usr/bin/sed '1,1d' | /usr/bin/sort -rn ; exit 0; fi
   if [[ $# -eq 1 ]]; then /bin/ps -axco pid,command | /usr/bin/sed '1,1d' | /usr/bin/sort -n ; exit 0; fi

   #pspid="$(/bin/ps -axco pid,command | /usr/bin/awk "/${2}/ { print \$1,\$2 }")"
   #printf "%-15s %-15s\n" $(printf "%s" "$pspid" | /usr/bin/sort -n)
   
   #pspid="$(/bin/ps -axco pid,command,uid | /usr/bin/awk "/${2}/ { print \$1,\$2,\$3 }")"
   #printf "%-20s %-20s %-20s\n" $(printf "%s" "$pspid" | /usr/bin/sort -n)

   #pspid="$(/bin/ps -axco pid,command,uid,user | /usr/bin/awk "/${2}/ {print \$1,\$2,\$3,\$4}")"
   #printf "%-20s %-20s %-20s %-20s\n" $(printf "%s" "$pspid" | /usr/bin/sort -n)

   pspid="$(/bin/ps -axco pid,command,uid,user,tty | /usr/bin/awk "/${2}/ {print \$1,\$2,\$3,\$4,\$5}")"
   printf "%-20s %-20s %-20s %-20s %-20s\n" $(printf "%s" "$pspid" | /usr/bin/sort -n)

   exit 0

fi

pspid="$(/bin/ps -axco pid,command | /usr/bin/awk "/${@}/ {print \$1}")"

if [[ -n "$pspid" ]]; then
   printf "%s\n" "$pspid"
else
   exit 1
fi

exit  0

EOF


/usr/bin/sudo /bin/mv -i ~/Desktop/pspid /usr/local/bin
/usr/bin/sudo /usr/sbin/chown root:wheel /usr/local/bin/pspid
/usr/bin/sudo /bin/chmod 0755 /usr/local/bin/pspid
/usr/bin/sudo /usr/bin/nano /usr/local/bin/pspid

open -a 'Activity Monitor'

pspid Finder
pspid Safari
pspid TextEdit
pspid 'QuickTime Player'
pspid login
pspid dynamic_pager
pspid launchd
pspid bash
echo $PPID

pspid -l
pspid -l login
pspid -l launchd
pspid -l bash
pspid -l '.*[sS]erver.*'
pspid -l '.*d$'
pspid -l '.*' | grep nobody
pspid -l '.*' | grep root