#compdef free

_arguments -s \
  '(-l --lohi)'{-l,--lohi}'[show detailed low and high memory statistics]' \
  '(-t --total)'{-t,--total}'[show total for RAM + swap]' \
  '(-w --wide)'{-w,--wide}'[wide mode]' \
  '(-s --seconds)'{-s,--seconds}'[specify the delay between display]:seconds: ' \
  '(-c --count)'{-c+,--count=}'[specify the display count]:count: ' \
  '(-C --full-cache)'{-C,--full-cache}'[add further cache lines to main cache]' \
  '--si[use power of 1000 instead of power of 1024]' \
  '(-)--help[print help and exit]' \
  '(-)'{-V,--version}'[print version information and exit]' \
  + '(unit)' \
  {-b,--bytes}'[display the amount of memory in bytes]' \
  {-k,--kibi}'[display the amount of memory in kibibytes (default)]' \
  {-m,--mebi}'[display the amount of memory in mebibytes]' \
  {-g,--gibi}'[display the amount of memory in gibibytes]' \
  '--tebi[display the amount of memory in tebibytes]' \
  '--pebi[display the amount of memory in pebibytes]' \
  '(--si)--kilo[display the amount of memory in kilobytes]' \
  '(--si)--mega[display the amount of memory in megabytes]' \
  '(--si)--giga[display the amount of memory in gigabytes]' \
  '(--si)--tera[display the amount of memory in terabytes]' \
  '(--si)--peta[display the amount of memory in petabytes]' \
  {-h,--human}'[automatically select unit]'