awklib/eg/lib/passwdawk.in


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# passwd.awk --- access password file information
# Arnold Robbins, arnold@gnu.ai.mit.edu, Public Domain
# May 1993

BEGIN {
    # tailor this to suit your system
    _pw_awklib = "/usr/local/libexec/awk/"
}

function _pw_init(    oldfs, oldrs, olddol0, pwcat)
{
    if (_pw_inited)
        return
    oldfs = FS
    oldrs = RS
    olddol0 = $0
    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
    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
}