/*
 * tclUnixCompat.c
 *
 * Written by: Zoran Vasiljevic (vasiljevic@users.sourceforge.net).
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclUnixCompat.c,v 1.8.6.3 2007/04/16 18:36:03 dgp Exp $
 *
 */

#include "tclInt.h"
#include "tclPort.h"
#include <pwd.h>
#include <grp.h>

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

static int
CopyArray(
    char **src,
    int elsize,
    char *buf,
    int buflen)
{
    int i, j, len = 0;
    char *p, **new;

    if (src == NULL) {
	return 0;
    }

 *      None
 *
 *---------------------------------------------------------------------------
 */


static int
CopyString(
    char *src,
    char *buf,
    int buflen)
{
    int len = 0;

    if (src != NULL) {
	len += strlen(src) + 1;
	if (len > buflen) {
	    return -1;

 * Side effects:
 *      None
 *
 *---------------------------------------------------------------------------
 */

static int
CopyHostent(
    struct hostent *tgtPtr,
    char *buf,
    int buflen)
{
    char *p = buf;
    int copied, len = 0;

    copied = CopyString(tgtPtr->h_name, p, buflen - len);
    if (copied == -1) {
    range:

 *      We are not copying the gecos field as it may not be supported
 *      on all platforms.
 *
 *---------------------------------------------------------------------------
 */

static int
CopyPwd(
    struct passwd *tgtPtr,
    char *buf,
    int buflen)
{
    char *p = buf;
    int copied, len = 0;

    copied = CopyString(tgtPtr->pw_name, p, buflen - len);
    if (copied == -1) {
    range:

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

static int
CopyGrp(
    struct group *tgtPtr,
    char *buf,
    int buflen)
{
    register char *p = buf;
    register int copied, len = 0;

    /* Copy username */
    copied = CopyString(tgtPtr->gr_name, p, buflen - len);
    if (copied == -1) {

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

struct passwd *
TclpGetPwNam(
    const char *name)
{
#if !defined(TCL_THREADS)
    return getpwnam(name);
#else
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

#if defined(HAVE_GETPWNAM_R_5)

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

struct passwd *
TclpGetPwUid(
    uid_t uid)
{
#if !defined(TCL_THREADS)
    return getpwuid(uid);
#else
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

#if defined(HAVE_GETPWUID_R_5)

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

struct group *
TclpGetGrNam(
    const char *name)
{
#if !defined(TCL_THREADS)
    return getgrnam(name);
#else
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

#if defined(HAVE_GETGRNAM_R_5)

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

struct group *
TclpGetGrGid(
    gid_t gid)
{
#if !defined(TCL_THREADS)
    return getgrgid(gid);
#else
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

#if defined(HAVE_GETGRGID_R_5)

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

struct hostent *
TclpGetHostByName(
    const char *name)
{
#if !defined(TCL_THREADS) || defined(HAVE_MTSAFE_GETHOSTBYNAME)
    return gethostbyname(name);
#else
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

#if defined(HAVE_GETHOSTBYNAME_R_5)

 * Side effects:
 *      None.
 *
 *---------------------------------------------------------------------------
 */

struct hostent *
TclpGetHostByAddr(
    const char *addr,
    int length,
    int type)
{
#if !defined(TCL_THREADS) || defined(HAVE_MTSAFE_GETHOSTBYADDR)
    return gethostbyaddr(addr, length, type);
#else
    ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);

#if defined(HAVE_GETHOSTBYADDR_R_7)