#autoload
#
# complete names of running processes
#
# options:
#   -a: include all processes (owned by others, no tty, etc.)
#   -t: use truncated process names (e.g., those in /proc/PID/stat)
#				    (only on Linux and BSDs)
#
# this name has been used in _killall and documented in zshcompsys(1)
local tagname='processes-names'
typeset -a expl opts names all truncate

zparseopts -E -D 'a=all' 't=truncate'
(( $#all )) && opts=( -A )

local hyphen='-'
# on Linux, use BSD-style option to include processes on other ttys
[[ $OSTYPE == linux* ]] && hyphen=''

case $OSTYPE in
  (linux*|freebsd*|openbsd*|netbsd*)
    if (( $#truncate )); then
      if [[ $OSTYPE == netbsd* ]]; then
	opts+=(-co args=)
      else
	opts+=(${hyphen}o comm=)
      fi
      names=( ${${(f)"$(_call_program $tagname ps $opts 2>/dev/null)"}#-} )
    else
      opts+=(${hyphen}o args=)
      names=( ${(f)"$(_call_program $tagname ps $opts 2>/dev/null )"} )
      names=( ${${${${${names:#\[*]}%% *}%:}#-}:t}
	       ${${${(M)names:#\[*]}#\[}%]} )
    fi
    ;;
  (*)
    # ignore -t option
    opts+=(-o comm=)
    names=( ${${${(f)"$(_call_program $tagname ps $opts 2>/dev/null)"}#-}:t} )
    ;;
esac

_wanted $tagname expl 'process name' compadd "$@" -F '(ps)' -a - names