NetBSD/gnu/dist/gawk/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
}