/* ********************************************************************** *\
 *         Copyright IBM Corporation 1988,1991 - All Rights Reserved      *
 *        For full copyright information see:'andrew/config/COPYRITE'     *
\* ********************************************************************** */

/*
	$Disclaimer: 
 * Permission to use, copy, modify, and distribute this software and its 
 * documentation for any purpose is hereby granted without fee, 
 * provided that the above copyright notice appear in all copies and that 
 * both that copyright notice, this permission notice, and the following 
 * disclaimer appear in supporting documentation, and that the names of 
 * IBM, Carnegie Mellon University, and other copyright holders, not be 
 * used in advertising or publicity pertaining to distribution of the software 
 * without specific, written prior permission.
 * 
 * IBM, CARNEGIE MELLON UNIVERSITY, AND THE OTHER COPYRIGHT HOLDERS 
 * DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 
 * ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.  IN NO EVENT 
 * SHALL IBM, CARNEGIE MELLON UNIVERSITY, OR ANY OTHER COPYRIGHT HOLDER 
 * BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY 
 * DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 
 * WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS 
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
 * OF THIS SOFTWARE.
 *  $
*/

#ifndef NORCSID
#define NORCSID
static char rcsid[]="$Header: /afs/cs.cmu.edu/project/atk-dist/auis-6.3/overhead/util/lib/RCS/gtvpwent.c,v 2.11 1992/12/15 21:10:10 rr2b R6tape $";
#endif

/* ************************************************************ *\
	gtvpwent.c
	getvpwent() is like getpwent(), but for Vice IDs
\* ************************************************************ */
#include <andyenv.h>
#include <andrewos.h> /* syslog.h */
#include <stdio.h>
#include <errno.h>
#include <util.h>
#ifdef WHITEPAGES_ENV
#include <pwd.h>
#include <wp.h>
#endif /* WHITEPAGES_ENV */
#include <svcconf.h>

extern int errno;

#ifdef WHITEPAGES_ENV
static int wpOpenedHere = 0;
static char *LastPK = NULL;
static int fldEK = -1;

int setvpwent()
{/* The equivalent of wp_Initialize() */
    CheckServiceConfiguration();
    if (AMS_UseWP) {
	if (LastPK != NULL) {free(LastPK); LastPK = NULL;}
	if (wpOpenedHere == 0) {
		if (_pw_OpenWP() != 0) wpOpenedHere = 1;
	}
	return wpOpenedHere;
    } else {
	(void) setpwent();
	return 1;
    }
}

int endvpwent()
{/* The equivalent of wp_Terminate() */
    CheckServiceConfiguration();
    if (AMS_UseWP) {
	if (LastPK != NULL) {free(LastPK); LastPK = NULL;}
	if (wpOpenedHere) _pw_CloseWP();
	wpOpenedHere = 0;
	return 0;
    } else {
	(void) endpwent();
	return(0);
    }
}

struct passwd *getvpwent()
{/* Return the next Vice struct passwd */
    wp_ErrorCode Res;
    char *Value;
    extern struct passwd *_pw_getvpwkey();

    CheckServiceConfiguration();
    if (AMS_UseWP) {
	if (wpOpenedHere == 0) {
		if (setvpwent() == 0) {
			errno = ETIMEDOUT;
			return NULL;
		}
	}
	if (fldEK < 0) {
	    fldEK = wp_FieldNameToIndex("EK");
	}
	for (;;) {
		Res = wp_Generate(&LastPK);
		if (Res != wperr_NoError) {endvpwent(); errno = ETIMEDOUT; return NULL;}
		if (LastPK == NULL) {errno = ENOENT; return NULL;}
		if (fldEK < 0) break;
		else {
			Res = wp_Read(LastPK, fldEK, &Value);
			if (Res != wperr_NoError) break;
			if ((atoi(Value) & 1) != 0) break;
		}
	}
	return _pw_getvpwkey(LastPK);
    } else {
	return(getpwent());
    }
}
#endif /* WHITEPAGES_ENV */