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#compdef killall killall5

if [[ $service = killall5 || $OSTYPE != (linux|*bsd|dragonfly|darwin)* ]]; then
  _signals -p
  return
fi

typeset -a opts args
[[ $EUID = 0 || $_comp_priv_prefix[1] = sudo ]] && opts=( -a )

if _pick_variant psmisc=PSmisc unix --version; then

  local curcontext=$curcontext state state_descr line ret=1
  typeset -A opt_args
  args=(
    '(-e --exact)'{-e,--exact}'[require exact match for names longer than 15 chars]'
    '(-I --ignore-case)'{-I,--ignore-case}'[do case insensitive process name match]'
    '(-g --process-group)'{-g,--process-group}'[kill the process group to which the process belongs]'
    '(-i --interactive)'{-i,--interactive}'[interactively ask for confirmation before killing]'
    '(- : *)'{-l,--list}'[list all known signal names]'
    '(-n --ns)'{-n+,--ns=}'[match against the PID namespace of the given PID]: : _pids'
    '(-o --older-than)'{-o+,--older-than=}'[match only processes older than the specified time]:time:->time'
    '(-q --quiet)'{-q,--quiet}'[do not complain if no processes were killed]'
    '(-r --regexp)'{-r,--regexp}'[interpret process name as extended regular expression]'
    '(1 -s --signal)'{-s+,--signal=}'[send the specified signal]: : _signals'
    '(-u --user)'{-u+,--user=}'[kill only processes owned by specified user]: : _users'
    '(-v --verbose)'{-v,--verbose}'[report if the signal was successfully sent]'
    '(-w --wait)'{-w,--wait}'[wait for all killed processes to die]'
    '(- : *)'{-V,--version}'[display version information]'
    '(-y --younger-than)'{-y+,--younger-than=}'[match only processes younger than the specified time]:time:->time'
    "1: : _alternative 'signals: :_signals -p' 'processes-names: :_process_names $opts'"
    "*: :_process_names $opts"
  )
  [[ $CURRENT = 2 || ( $CURRENT = 3 && $words[2] = (-Z|--context) ) ]] && \
    args+=( '(-Z --context)'{-Z+,--context=}'[specify SELinux security context]:regex pattern:_selinux_contexts' )

  _arguments -s -S -C : $args && ret=0

  case $state in
    (time)
      _numbers -fN age 's:seconds' 'm:minutes' 'h:hours' 'd:days' \
          'w:weeks' 'M:months' 'y:years'
    ;;
  esac

  return ret

else # bsd and darwin

  if [[ $OSTYPE == (freebsd|dragonfly)* ]]; then
    args=( '-j+[kill processes in specified jail]: :_jails -0' )
    opts+=( -t )  # long process names must be truncated
  fi
  args+=(
    '-v[be more verbose about what will be done]'
    '-e[use effective user ID for -u option]'
    '(- : *)-help[give a help on command usage and exit]'
    '(- : *)-l[list names of available signals and exit]'
    '-m[interpret specified name as a regular expression]'
    '-s[show only what will be done, but do not send any signal]'
    '-d[print info about processes matched, but do not send any signal]'
    '-u+[limit to processes belonging to specified user]: : _users'
    '-t+[limit to processes running on specified tty]: :_ttys -od'
    "-c+[with -u or -t, limit to processes matching specified name]: :_process_names $opts"
    '-z[do not skip zombies]'
    "*: :_process_names $opts"
    + '(signal)' -$signals[2,-3]
  )
  _arguments -s -S -A '-*' : $args

fi