# passwd.awk --- access password file information

#

# Arnold Robbins, arnold@skeeve.com, Public Domain

# May 1993

# Revised October 2000

# Revised December 2010

BEGIN {

    # tailor this to suit your system

    _pw_awklib = "/usr/local/libexec/awk/"

}

function _pw_init(    oldfs, oldrs, olddol0, pwcat, using_fw, using_fpat)

{

    if (_pw_inited)

        return

    oldfs = FS

    oldrs = RS

    olddol0 = $0

    using_fw = (PROCINFO["FS"] == "FIELDWIDTHS")

    using_fpat = (PROCINFO["FS"] == "FPAT")

    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

    else if (using_fpat)

        FPAT = FPAT

    RS = oldrs

    $0 = olddol0

}

function getpwnam(name)

{

    _pw_init()

    return _pw_byname[name]

}

function getpwuid(uid)

{

    _pw_init()

    return _pw_byuid[uid]

}

function getpwent()

{

    _pw_init()

    if (_pw_count < _pw_total)

        return _pw_bycount[++_pw_count]

    return ""

}

function endpwent()

{

    _pw_count = 0

}