#compdef fstat

local pids
pids=(${${${(f)"$(/usr/bin/procstat -ah)"}/[[:space:]]#/}/[[:space:]]*[[:space:]](ELF[[:digit:]]#[[:space:]]|-[[:space:]]#)/:})

_arguments -s \
'-f[restrict examination to files open in the same file systems as the named file arguments]' \
'-M[extract values associated with the name list from the specified core]:core:_files' \
'-N[extract the name list from the specified system]:system:' \
'-m[include memory-mapped files in the listing]' \
'-n[numerical format]' \
'-p[report all files open by the specified process]:process id:(($pids))' \
'-u[report all files open by the specified user]:user:_users' \
'-v[verbose mode]' \
'*:files:_files'