# passwd.awk --- access password file information## Arnold Robbins, arnold@skeeve.com, Public Domain# May 1993# Revised October 2000BEGIN {    # tailor this to suit your system    _pw_awklib = "/usr/local/libexec/awk/"}function _pw_init(    oldfs, oldrs, olddol0, pwcat, using_fw){    if (_pw_inited)        return    oldfs = FS    oldrs = RS    olddol0 = $0    using_fw = (PROCINFO["FS"] == "FIELDWIDTHS")    FS = ":"    RS = "\n"    pwcat = _pw_awklib "pwcat"    while ((pwcat | getline) > 0) {        _pw_byname[$1] = $0        _pw_byuid[$3] = $0        _pw_bycount[++_pw_total] = $0    }    close(pwcat)    _pw_count = 0    _pw_inited = 1    FS = oldfs    if (using_fw)        FIELDWIDTHS = FIELDWIDTHS    RS = oldrs    $0 = olddol0}function getpwnam(name){    _pw_init()    if (name in _pw_byname)        return _pw_byname[name]    return ""}function getpwuid(uid){    _pw_init()    if (uid in _pw_byuid)        return _pw_byuid[uid]    return ""}function getpwent(){    _pw_init()    if (_pw_count < _pw_total)        return _pw_bycount[++_pw_count]    return ""}function endpwent(){    _pw_count = 0}