param: remove NUMPARAMETERS macro from lib/param

[Samba.git] / lib / param / loadparm.c

/* 
   Unix SMB/CIFS implementation.
   Parameter loading functions
   Copyright (C) Karl Auer 1993-1998

   Largely re-written by Andrew Tridgell, September 1994

   Copyright (C) Simo Sorce 2001
   Copyright (C) Alexander Bokovoy 2002
   Copyright (C) Stefan (metze) Metzmacher 2002
   Copyright (C) Jim McDonough (jmcd@us.ibm.com)  2003.
   Copyright (C) James Myers 2003 <myersjj@samba.org>
   Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2007
   Copyright (C) Andrew Bartlett 2011-2012

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

/*
 *  Load parameters.
 *
 *  This module provides suitable callback functions for the params
 *  module. It builds the internal table of service details which is
 *  then used by the rest of the server.
 *
 * To add a parameter:
 *
 * 1) add it to the global or service structure definition
 * 2) add it to the parm_table
 * 3) add it to the list of available functions (eg: using FN_GLOBAL_STRING())
 * 4) If it's a global then initialise it in init_globals. If a local
 *    (ie. service) parameter then initialise it in the sDefault structure
 *
 *
 * Notes:
 *   The configuration file is processed sequentially for speed. It is NOT
 *   accessed randomly as happens in 'real' Windows. For this reason, there
 *   is a fair bit of sequence-dependent code here - ie., code which assumes
 *   that certain things happen before others. In particular, the code which
 *   happens at the boundary between sections is delicately poised, so be
 *   careful!
 *
 */

#include "includes.h"
#include "version.h"
#include "dynconfig/dynconfig.h"
#include "system/time.h"
#include "system/locale.h"
#include "system/network.h" /* needed for TCP_NODELAY */
#include "../lib/util/dlinklist.h"
#include "lib/param/param.h"
#include "lib/param/loadparm.h"
#include "auth/gensec/gensec.h"
#include "lib/param/s3_param.h"
#include "lib/util/bitmap.h"
#include "libcli/smb/smb_constants.h"
#include "tdb.h"

#define standard_sub_basic talloc_strdup

static bool do_parameter(const char *, const char *, void *);
static bool defaults_saved = false;

#include "lib/param/param_global.h"

struct loadparm_service *lpcfg_default_service(struct loadparm_context *lp_ctx)
{
        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_default_loadparm_service();
        }
        return lp_ctx->sDefault;
}

/**
 * Convenience routine to grab string parameters into temporary memory
 * and run standard_sub_basic on them.
 *
 * The buffers can be written to by
 * callers without affecting the source string.
 */

static const char *lpcfg_string(const char *s)
{
#if 0  /* until REWRITE done to make thread-safe */
        size_t len = s ? strlen(s) : 0;
        char *ret;
#endif

        /* The follow debug is useful for tracking down memory problems
           especially if you have an inner loop that is calling a lp_*()
           function that returns a string.  Perhaps this debug should be
           present all the time? */

#if 0
        DEBUG(10, ("lpcfg_string(%s)\n", s));
#endif

#if 0  /* until REWRITE done to make thread-safe */
        if (!lp_talloc)
                lp_talloc = talloc_init("lp_talloc");

        ret = talloc_array(lp_talloc, char, len + 100); /* leave room for substitution */

        if (!ret)
                return NULL;

        if (!s)
                *ret = 0;
        else
                strlcpy(ret, s, len);

        if (trim_string(ret, "\"", "\"")) {
                if (strchr(ret,'"') != NULL)
                        strlcpy(ret, s, len);
        }

        standard_sub_basic(ret,len+100);
        return (ret);
#endif
        return s;
}

/*
   In this section all the functions that are used to access the
   parameters from the rest of the program are defined
*/

/*
 * the creation of separate lpcfg_*() and lp_*() functions is to allow
 * for code compatibility between existing Samba4 and Samba3 code.
 */

/* this global context supports the lp_*() function varients */
static struct loadparm_context *global_loadparm_context;

#define lpcfg_default_service global_loadparm_context->sDefault
#define lpcfg_global_service(i) global_loadparm_context->services[i]

#define FN_GLOBAL_STRING(fn_name,var_name) \
 _PUBLIC_ char *lpcfg_ ## fn_name(struct loadparm_context *lp_ctx, TALLOC_CTX *ctx) {\
         if (lp_ctx == NULL) return NULL;                               \
         if (lp_ctx->s3_fns) {                                          \
                 return lp_ctx->globals->var_name ? lp_ctx->s3_fns->lp_string(ctx, lp_ctx->globals->var_name) : talloc_strdup(ctx, ""); \
         }                                                              \
         return lp_ctx->globals->var_name ? talloc_strdup(ctx, lpcfg_string(lp_ctx->globals->var_name)) : talloc_strdup(ctx, ""); \
}

#define FN_GLOBAL_CONST_STRING(fn_name,var_name)                                \
 _PUBLIC_ const char *lpcfg_ ## fn_name(struct loadparm_context *lp_ctx) { \
        if (lp_ctx == NULL) return NULL;                                \
        return lp_ctx->globals->var_name ? lpcfg_string(lp_ctx->globals->var_name) : ""; \
}

#define FN_GLOBAL_LIST(fn_name,var_name)                                \
 _PUBLIC_ const char **lpcfg_ ## fn_name(struct loadparm_context *lp_ctx) { \
         if (lp_ctx == NULL) return NULL;                               \
         return lp_ctx->globals->var_name;                              \
 }

#define FN_GLOBAL_BOOL(fn_name,var_name) \
 _PUBLIC_ bool lpcfg_ ## fn_name(struct loadparm_context *lp_ctx) {\
         if (lp_ctx == NULL) return false;                              \
         return lp_ctx->globals->var_name;                              \
}

#define FN_GLOBAL_INTEGER(fn_name,var_name) \
 _PUBLIC_ int lpcfg_ ## fn_name(struct loadparm_context *lp_ctx) { \
         return lp_ctx->globals->var_name;                              \
 }

/* Local parameters don't need the ->s3_fns because the struct
 * loadparm_service is shared and lpcfg_service() checks the ->s3_fns
 * hook */
#define FN_LOCAL_STRING(fn_name,val) \
 _PUBLIC_ char *lpcfg_ ## fn_name(struct loadparm_service *service, \
                                        struct loadparm_service *sDefault, TALLOC_CTX *ctx) { \
         return(talloc_strdup(ctx, lpcfg_string((const char *)((service != NULL && service->val != NULL) ? service->val : sDefault->val)))); \
 }

#define FN_LOCAL_CONST_STRING(fn_name,val) \
 _PUBLIC_ const char *lpcfg_ ## fn_name(struct loadparm_service *service, \
                                        struct loadparm_service *sDefault) { \
         return((const char *)((service != NULL && service->val != NULL) ? service->val : sDefault->val)); \
 }

#define FN_LOCAL_LIST(fn_name,val) \
 _PUBLIC_ const char **lpcfg_ ## fn_name(struct loadparm_service *service, \
                                         struct loadparm_service *sDefault) {\
         return(const char **)(service != NULL && service->val != NULL? service->val : sDefault->val); \
 }

#define FN_LOCAL_PARM_BOOL(fn_name, val) FN_LOCAL_BOOL(fn_name, val)

#define FN_LOCAL_BOOL(fn_name,val) \
 _PUBLIC_ bool lpcfg_ ## fn_name(struct loadparm_service *service, \
                                 struct loadparm_service *sDefault) {   \
         return((service != NULL)? service->val : sDefault->val); \
 }

#define FN_LOCAL_INTEGER(fn_name,val) \
 _PUBLIC_ int lpcfg_ ## fn_name(struct loadparm_service *service, \
                                struct loadparm_service *sDefault) {    \
         return((service != NULL)? service->val : sDefault->val); \
 }

#define FN_LOCAL_PARM_INTEGER(fn_name, val) FN_LOCAL_INTEGER(fn_name, val)

#define FN_LOCAL_PARM_CHAR(fn_name,val) \
 _PUBLIC_ char lpcfg_ ## fn_name(struct loadparm_service *service, \
                                struct loadparm_service *sDefault) {    \
         return((service != NULL)? service->val : sDefault->val); \
 }

#include "lib/param/param_functions.c"

/* These functions cannot be auto-generated */
FN_LOCAL_BOOL(autoloaded, autoloaded)
FN_GLOBAL_CONST_STRING(dnsdomain, dnsdomain)

/* local prototypes */
static struct loadparm_service *lpcfg_getservicebyname(struct loadparm_context *lp_ctx,
                                        const char *pszServiceName);
static bool lpcfg_service_ok(struct loadparm_service *service);
static bool do_section(const char *pszSectionName, void *);

/* This is a helper function for parametrical options support. */
/* It returns a pointer to parametrical option value if it exists or NULL otherwise */
/* Actual parametrical functions are quite simple */
const char *lpcfg_get_parametric(struct loadparm_context *lp_ctx,
                              struct loadparm_service *service,
                              const char *type, const char *option)
{
        char *vfskey = NULL;
        struct parmlist_entry *data;

        if (lp_ctx == NULL)
                return NULL;

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_parametric(service, type, option, NULL);
        }

        data = (service == NULL ? lp_ctx->globals->param_opt : service->param_opt);

        vfskey = talloc_asprintf(NULL, "%s:%s", type, option);
        if (vfskey == NULL) {
                DEBUG(0,("asprintf failed!\n"));
                return NULL;
        }

        while (data) {
                if (strwicmp(data->key, vfskey) == 0) {
                        talloc_free(vfskey);
                        return data->value;
                }
                data = data->next;
        }

        if (service != NULL) {
                /* Try to fetch the same option but from globals */
                /* but only if we are not already working with globals */
                for (data = lp_ctx->globals->param_opt; data;
                     data = data->next) {
                        if (strwicmp(data->key, vfskey) == 0) {
                                talloc_free(vfskey);
                                return data->value;
                        }
                }
        }

        talloc_free(vfskey);

        return NULL;
}


/**
 * convenience routine to return int parameters.
 */
int lp_int(const char *s)
{

        if (!s || !*s) {
                DEBUG(0,("lp_int(%s): is called with NULL!\n",s));
                return -1;
        }

        return strtol(s, NULL, 0);
}

/**
 * convenience routine to return unsigned long parameters.
 */
unsigned long lp_ulong(const char *s)
{

        if (!s || !*s) {
                DEBUG(0,("lp_ulong(%s): is called with NULL!\n",s));
                return -1;
        }

        return strtoul(s, NULL, 0);
}

/**
 * convenience routine to return unsigned long parameters.
 */
static long lp_long(const char *s)
{

        if (!s) {
                DEBUG(0,("lp_long(%s): is called with NULL!\n",s));
                return -1;
        }

        return strtol(s, NULL, 0);
}

/**
 * convenience routine to return unsigned long parameters.
 */
static double lp_double(const char *s)
{

        if (!s) {
                DEBUG(0,("lp_double(%s): is called with NULL!\n",s));
                return -1;
        }

        return strtod(s, NULL);
}

/**
 * convenience routine to return boolean parameters.
 */
bool lp_bool(const char *s)
{
        bool ret = false;

        if (!s || !*s) {
                DEBUG(0,("lp_bool(%s): is called with NULL!\n",s));
                return false;
        }

        if (!set_boolean(s, &ret)) {
                DEBUG(0,("lp_bool(%s): value is not boolean!\n",s));
                return false;
        }

        return ret;
}

/**
 * Return parametric option from a given service. Type is a part of option before ':'
 * Parametric option has following syntax: 'Type: option = value'
 * Returned value is allocated in 'lp_talloc' context
 */

const char *lpcfg_parm_string(struct loadparm_context *lp_ctx,
                              struct loadparm_service *service, const char *type,
                              const char *option)
{
        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value)
                return lpcfg_string(value);

        return NULL;
}

/**
 * Return parametric option from a given service. Type is a part of option before ':'
 * Parametric option has following syntax: 'Type: option = value'
 * Returned value is allocated in 'lp_talloc' context
 */

const char **lpcfg_parm_string_list(TALLOC_CTX *mem_ctx,
                                    struct loadparm_context *lp_ctx,
                                    struct loadparm_service *service,
                                    const char *type,
                                    const char *option, const char *separator)
{
        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value != NULL)
                return (const char **)str_list_make(mem_ctx, value, separator);

        return NULL;
}

/**
 * Return parametric option from a given service. Type is a part of option before ':'
 * Parametric option has following syntax: 'Type: option = value'
 */

int lpcfg_parm_int(struct loadparm_context *lp_ctx,
                   struct loadparm_service *service, const char *type,
                   const char *option, int default_v)
{
        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value)
                return lp_int(value);

        return default_v;
}

/**
 * Return parametric option from a given service. Type is a part of
 * option before ':'.
 * Parametric option has following syntax: 'Type: option = value'.
 */

int lpcfg_parm_bytes(struct loadparm_context *lp_ctx,
                  struct loadparm_service *service, const char *type,
                  const char *option, int default_v)
{
        uint64_t bval;

        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value && conv_str_size_error(value, &bval)) {
                if (bval <= INT_MAX) {
                        return (int)bval;
                }
        }

        return default_v;
}

/**
 * Return parametric option from a given service.
 * Type is a part of option before ':'
 * Parametric option has following syntax: 'Type: option = value'
 */
unsigned long lpcfg_parm_ulong(struct loadparm_context *lp_ctx,
                            struct loadparm_service *service, const char *type,
                            const char *option, unsigned long default_v)
{
        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value)
                return lp_ulong(value);

        return default_v;
}

long lpcfg_parm_long(struct loadparm_context *lp_ctx,
                     struct loadparm_service *service, const char *type,
                     const char *option, long default_v)
{
        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value)
                return lp_long(value);

        return default_v;
}

double lpcfg_parm_double(struct loadparm_context *lp_ctx,
                      struct loadparm_service *service, const char *type,
                      const char *option, double default_v)
{
        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value != NULL)
                return lp_double(value);

        return default_v;
}

/**
 * Return parametric option from a given service. Type is a part of option before ':'
 * Parametric option has following syntax: 'Type: option = value'
 */

bool lpcfg_parm_bool(struct loadparm_context *lp_ctx,
                     struct loadparm_service *service, const char *type,
                     const char *option, bool default_v)
{
        const char *value = lpcfg_get_parametric(lp_ctx, service, type, option);

        if (value != NULL)
                return lp_bool(value);

        return default_v;
}


/**
 * Set a string value, deallocating any existing space, and allocing the space
 * for the string
 */
bool lpcfg_string_set(TALLOC_CTX *mem_ctx, char **dest, const char *src)
{
        talloc_free(*dest);

        if (src == NULL)
                src = "";

        *dest = talloc_strdup(mem_ctx, src);
        if ((*dest) == NULL) {
                DEBUG(0,("Out of memory in string_set\n"));
                return false;
        }

        return true;
}

/**
 * Set a string value, deallocating any existing space, and allocing the space
 * for the string
 */
static bool lpcfg_string_set_upper(TALLOC_CTX *mem_ctx, char **dest, const char *src)
{
        talloc_free(*dest);

        if (src == NULL)
                src = "";

        *dest = strupper_talloc(mem_ctx, src);
        if ((*dest) == NULL) {
                DEBUG(0,("Out of memory in string_set_upper\n"));
                return false;
        }

        return true;
}



/**
 * Add a new service to the services array initialising it with the given
 * service.
 */

struct loadparm_service *lpcfg_add_service(struct loadparm_context *lp_ctx,
                                           const struct loadparm_service *pservice,
                                           const char *name)
{
        int i;
        int num_to_alloc = lp_ctx->iNumServices + 1;
        struct parmlist_entry *data, *pdata;

        if (pservice == NULL) {
                pservice = lp_ctx->sDefault;
        }

        /* it might already exist */
        if (name) {
                struct loadparm_service *service = lpcfg_getservicebyname(lp_ctx,
                                                                    name);
                if (service != NULL) {
                        /* Clean all parametric options for service */
                        /* They will be added during parsing again */
                        data = service->param_opt;
                        while (data) {
                                pdata = data->next;
                                talloc_free(data);
                                data = pdata;
                        }
                        service->param_opt = NULL;
                        return service;
                }
        }

        /* find an invalid one */
        for (i = 0; i < lp_ctx->iNumServices; i++)
                if (lp_ctx->services[i] == NULL)
                        break;

        /* if not, then create one */
        if (i == lp_ctx->iNumServices) {
                struct loadparm_service **tsp;

                tsp = talloc_realloc(lp_ctx, lp_ctx->services, struct loadparm_service *, num_to_alloc);

                if (!tsp) {
                        DEBUG(0,("lpcfg_add_service: failed to enlarge services!\n"));
                        return NULL;
                } else {
                        lp_ctx->services = tsp;
                        lp_ctx->services[lp_ctx->iNumServices] = NULL;
                }

                lp_ctx->iNumServices++;
        }

        lp_ctx->services[i] = talloc_zero(lp_ctx->services, struct loadparm_service);
        if (lp_ctx->services[i] == NULL) {
                DEBUG(0,("lpcfg_add_service: out of memory!\n"));
                return NULL;
        }
        copy_service(lp_ctx->services[i], pservice, NULL);
        if (name != NULL)
                lpcfg_string_set(lp_ctx->services[i], &lp_ctx->services[i]->szService, name);
        return lp_ctx->services[i];
}

/**
 * Add a new home service, with the specified home directory, defaults coming
 * from service ifrom.
 */

bool lpcfg_add_home(struct loadparm_context *lp_ctx,
                 const char *pszHomename,
                 struct loadparm_service *default_service,
                 const char *user, const char *pszHomedir)
{
        struct loadparm_service *service;

        service = lpcfg_add_service(lp_ctx, default_service, pszHomename);

        if (service == NULL)
                return false;

        if (!(*(default_service->path))
            || strequal(default_service->path, lp_ctx->sDefault->path)) {
                service->path = talloc_strdup(service, pszHomedir);
        } else {
                service->path = string_sub_talloc(service, lpcfg_path(default_service, lp_ctx->sDefault, service), "%H", pszHomedir);
        }

        if (!(*(service->comment))) {
                service->comment = talloc_asprintf(service, "Home directory of %s", user);
        }
        service->bAvailable = default_service->bAvailable;
        service->browseable = default_service->browseable;

        DEBUG(3, ("adding home's share [%s] for user '%s' at '%s'\n",
                  pszHomename, user, service->path));

        return true;
}

/**
 * Add a new printer service, with defaults coming from service iFrom.
 */

bool lpcfg_add_printer(struct loadparm_context *lp_ctx,
                       const char *pszPrintername,
                       struct loadparm_service *default_service)
{
        const char *comment = "From Printcap";
        struct loadparm_service *service;
        service = lpcfg_add_service(lp_ctx, default_service, pszPrintername);

        if (service == NULL)
                return false;

        /* note that we do NOT default the availability flag to True - */
        /* we take it from the default service passed. This allows all */
        /* dynamic printers to be disabled by disabling the [printers] */
        /* entry (if/when the 'available' keyword is implemented!).    */

        /* the printer name is set to the service name. */
        lpcfg_string_set(service, &service->_printername, pszPrintername);
        lpcfg_string_set(service, &service->comment, comment);
        service->browseable = default_service->browseable;
        /* Printers cannot be read_only. */
        service->read_only = false;
        /* Printer services must be printable. */
        service->printable = true;

        DEBUG(3, ("adding printer service %s\n", pszPrintername));

        return true;
}

/**
 * Map a parameter's string representation to something we can use.
 * Returns False if the parameter string is not recognised, else TRUE.
 */

int lpcfg_map_parameter(const char *pszParmName)
{
        int iIndex;

        for (iIndex = 0; parm_table[iIndex].label; iIndex++)
                if (strwicmp(parm_table[iIndex].label, pszParmName) == 0)
                        return iIndex;

        /* Warn only if it isn't parametric option */
        if (strchr(pszParmName, ':') == NULL)
                DEBUG(0, ("Unknown parameter encountered: \"%s\"\n", pszParmName));
        /* We do return 'fail' for parametric options as well because they are
           stored in different storage
         */
        return -1;
}


/**
  return the parameter structure for a parameter
*/
struct parm_struct *lpcfg_parm_struct(struct loadparm_context *lp_ctx, const char *name)
{
        int parmnum;

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_parm_struct(name);
        }

        parmnum = lpcfg_map_parameter(name);
        if (parmnum == -1) return NULL;
        return &parm_table[parmnum];
}

/**
  return the parameter pointer for a parameter
*/
void *lpcfg_parm_ptr(struct loadparm_context *lp_ctx,
                  struct loadparm_service *service, struct parm_struct *parm)
{
        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_parm_ptr(service, parm);
        }

        if (service == NULL) {
                if (parm->p_class == P_LOCAL)
                        return ((char *)lp_ctx->sDefault)+parm->offset;
                else if (parm->p_class == P_GLOBAL)
                        return ((char *)lp_ctx->globals)+parm->offset;
                else return NULL;
        } else {
                return ((char *)service) + parm->offset;
        }
}

/**
  return the parameter pointer for a parameter
*/
bool lpcfg_parm_is_cmdline(struct loadparm_context *lp_ctx, const char *name)
{
        int parmnum;

        if (lp_ctx->s3_fns) {
                struct parm_struct *parm = lp_ctx->s3_fns->get_parm_struct(name);
                if (parm) {
                        return parm->flags & FLAG_CMDLINE;
                }
                return false;
        }

        parmnum = lpcfg_map_parameter(name);
        if (parmnum == -1) return false;

        return lp_ctx->flags[parmnum] & FLAG_CMDLINE;
}

/**
 * Find a service by name. Otherwise works like get_service.
 */

static struct loadparm_service *lpcfg_getservicebyname(struct loadparm_context *lp_ctx,
                                        const char *pszServiceName)
{
        int iService;

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_service(pszServiceName);
        }

        for (iService = lp_ctx->iNumServices - 1; iService >= 0; iService--)
                if (lp_ctx->services[iService] != NULL &&
                    strwicmp(lp_ctx->services[iService]->szService, pszServiceName) == 0) {
                        return lp_ctx->services[iService];
                }

        return NULL;
}

/**
 * Add a parametric option to a parmlist_entry,
 * replacing old value, if already present.
 */
void set_param_opt(TALLOC_CTX *mem_ctx,
                   struct parmlist_entry **opt_list,
                   const char *opt_name,
                   const char *opt_value,
                   unsigned priority)
{
        struct parmlist_entry *new_opt, *opt;
        bool not_added;

        opt = *opt_list;
        not_added = true;

        /* Traverse destination */
        while (opt) {
                /* If we already have same option, override it */
                if (strwicmp(opt->key, opt_name) == 0) {
                        if ((opt->priority & FLAG_CMDLINE) &&
                            !(priority & FLAG_CMDLINE)) {
                                /* it's been marked as not to be
                                   overridden */
                                return;
                        }
                        TALLOC_FREE(opt->value);
                        TALLOC_FREE(opt->list);
                        opt->value = talloc_strdup(opt, opt_value);
                        opt->priority = priority;
                        not_added = false;
                        break;
                }
                opt = opt->next;
        }
        if (not_added) {
                new_opt = talloc(mem_ctx, struct parmlist_entry);
                if (new_opt == NULL) {
                        smb_panic("OOM");
                }

                new_opt->key = talloc_strdup(new_opt, opt_name);
                if (new_opt->key == NULL) {
                        smb_panic("talloc_strdup failed");
                }

                new_opt->value = talloc_strdup(new_opt, opt_value);
                if (new_opt->value == NULL) {
                        smb_panic("talloc_strdup failed");
                }

                new_opt->list = NULL;
                new_opt->priority = priority;
                DLIST_ADD(*opt_list, new_opt);
        }
}

/**
 * Copy a service structure to another.
 * If pcopymapDest is NULL then copy all fields
 */

void copy_service(struct loadparm_service *pserviceDest,
                  const struct loadparm_service *pserviceSource,
                  struct bitmap *pcopymapDest)
{
        int i;
        bool bcopyall = (pcopymapDest == NULL);
        struct parmlist_entry *data;

        for (i = 0; parm_table[i].label; i++)
                if (parm_table[i].p_class == P_LOCAL &&
                    (bcopyall || bitmap_query(pcopymapDest, i))) {
                        const void *src_ptr =
                                ((const char *)pserviceSource) + parm_table[i].offset;
                        void *dest_ptr =
                                ((char *)pserviceDest) + parm_table[i].offset;

                        switch (parm_table[i].type) {
                                case P_BOOL:
                                case P_BOOLREV:
                                        *(bool *)dest_ptr = *(const bool *)src_ptr;
                                        break;

                                case P_INTEGER:
                                case P_BYTES:
                                case P_OCTAL:
                                case P_ENUM:
                                        *(int *)dest_ptr = *(const int *)src_ptr;
                                        break;

                                case P_CHAR:
                                        *(char *)dest_ptr = *(const char *)src_ptr;
                                        break;

                                case P_STRING:
                                        lpcfg_string_set(pserviceDest,
                                                   (char **)dest_ptr,
                                                   *(const char * const *)src_ptr);
                                        break;

                                case P_USTRING:
                                        lpcfg_string_set_upper(pserviceDest,
                                                         (char **)dest_ptr,
                                                         *(const char * const *)src_ptr);
                                        break;
                                case P_CMDLIST:
                                case P_LIST:
                                        TALLOC_FREE(*((char ***)dest_ptr));
                                        *(const char * const **)dest_ptr = (const char * const *)str_list_copy(pserviceDest,
                                                                                  *(const char * * const *)src_ptr);
                                        break;
                                default:
                                        break;
                        }
                }

        if (bcopyall) {
                init_copymap(pserviceDest);
                if (pserviceSource->copymap)
                        bitmap_copy(pserviceDest->copymap,
                                    pserviceSource->copymap);
        }

        for (data = pserviceSource->param_opt; data != NULL; data = data->next) {
                set_param_opt(pserviceDest, &pserviceDest->param_opt,
                              data->key, data->value, data->priority);
        }
}

/**
 * Check a service for consistency. Return False if the service is in any way
 * incomplete or faulty, else True.
 */
static bool lpcfg_service_ok(struct loadparm_service *service)
{
        bool bRetval;

        bRetval = true;
        if (service->szService[0] == '\0') {
                DEBUG(0, ("The following message indicates an internal error:\n"));
                DEBUG(0, ("No service name in service entry.\n"));
                bRetval = false;
        }

        /* The [printers] entry MUST be printable. I'm all for flexibility, but */
        /* I can't see why you'd want a non-printable printer service...        */
        if (strwicmp(service->szService, PRINTERS_NAME) == 0) {
                if (!service->printable) {
                        DEBUG(0, ("WARNING: [%s] service MUST be printable!\n",
                               service->szService));
                        service->printable = true;
                }
                /* [printers] service must also be non-browsable. */
                if (service->browseable)
                        service->browseable = false;
        }

        /* If a service is flagged unavailable, log the fact at level 0. */
        if (!service->bAvailable)
                DEBUG(1, ("NOTE: Service %s is flagged unavailable.\n",
                          service->szService));

        return bRetval;
}


/*******************************************************************
 Keep a linked list of all config files so we know when one has changed
 it's date and needs to be reloaded.
********************************************************************/

void add_to_file_list(TALLOC_CTX *mem_ctx, struct file_lists **list,
                             const char *fname, const char *subfname)
{
        struct file_lists *f = *list;

        while (f) {
                if (f->name && !strcmp(f->name, fname))
                        break;
                f = f->next;
        }

        if (!f) {
                f = talloc(mem_ctx, struct file_lists);
                if (!f)
                        goto fail;
                f->next = *list;
                f->name = talloc_strdup(f, fname);
                if (!f->name) {
                        TALLOC_FREE(f);
                        goto fail;
                }
                f->subfname = talloc_strdup(f, subfname);
                if (!f->subfname) {
                        TALLOC_FREE(f);
                        goto fail;
                }
                *list = f;
                f->modtime = file_modtime(subfname);
        } else {
                time_t t = file_modtime(subfname);
                if (t)
                        f->modtime = t;
        }
        return;

fail:
        DEBUG(0, ("Unable to add file to file list: %s\n", fname));

}

/*******************************************************************
 Check if a config file has changed date.
********************************************************************/
bool lpcfg_file_list_changed(struct loadparm_context *lp_ctx)
{
        struct file_lists *f;
        DEBUG(6, ("lpcfg_file_list_changed()\n"));

        for (f = lp_ctx->file_lists; f != NULL; f = f->next) {
                char *n2;
                time_t mod_time;

                n2 = standard_sub_basic(lp_ctx, f->name);

                DEBUGADD(6, ("file %s -> %s  last mod_time: %s\n",
                             f->name, n2, ctime(&f->modtime)));

                mod_time = file_modtime(n2);

                if (mod_time && ((f->modtime != mod_time) || (f->subfname == NULL) || (strcmp(n2, f->subfname) != 0))) {
                        DEBUGADD(6, ("file %s modified: %s\n", n2,
                                  ctime(&mod_time)));
                        f->modtime = mod_time;
                        talloc_free(f->subfname);
                        f->subfname = talloc_strdup(f, n2);
                        return true;
                }
        }
        return false;
}

/*
 * set the value for a P_ENUM
 */
bool lp_set_enum_parm( struct parm_struct *parm, const char *pszParmValue,
                              int *ptr )
{
        int i;

        for (i = 0; parm->enum_list[i].name; i++) {
                if ( strequal(pszParmValue, parm->enum_list[i].name)) {
                        *ptr = parm->enum_list[i].value;
                        return true;
                }
        }
        DEBUG(0, ("WARNING: Ignoring invalid value '%s' for parameter '%s'\n",
                  pszParmValue, parm->label));
        return false;
}


/***************************************************************************
 Handle the "realm" parameter
***************************************************************************/

bool handle_realm(struct loadparm_context *lp_ctx, int unused,
                  const char *pszParmValue, char **ptr)
{
        char *upper;
        char *lower;

        upper = strupper_talloc(lp_ctx, pszParmValue);
        if (upper == NULL) {
                return false;
        }

        lower = strlower_talloc(lp_ctx, pszParmValue);
        if (lower == NULL) {
                TALLOC_FREE(upper);
                return false;
        }

        if (lp_ctx->s3_fns != NULL) {
                lp_ctx->s3_fns->lp_string_set(ptr, pszParmValue);
                lp_ctx->s3_fns->lp_string_set(&lp_ctx->globals->realm, upper);
                lp_ctx->s3_fns->lp_string_set(&lp_ctx->globals->dnsdomain, lower);
        } else {
                lpcfg_string_set(lp_ctx, ptr, pszParmValue);
                lpcfg_string_set(lp_ctx, &lp_ctx->globals->realm, upper);
                lpcfg_string_set(lp_ctx, &lp_ctx->globals->dnsdomain, lower);
        }

        return true;
}

/***************************************************************************
 Handle the include operation.
***************************************************************************/

bool handle_include(struct loadparm_context *lp_ctx, int unused,
                           const char *pszParmValue, char **ptr)
{
        char *fname;

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->lp_include(lp_ctx, unused, pszParmValue, ptr);
        }

        fname = standard_sub_basic(lp_ctx, pszParmValue);

        add_to_file_list(lp_ctx, &lp_ctx->file_lists, pszParmValue, fname);

        lpcfg_string_set(lp_ctx, ptr, fname);

        if (file_exist(fname))
                return pm_process(fname, do_section, do_parameter, lp_ctx);

        DEBUG(2, ("Can't find include file %s\n", fname));

        return false;
}

/***************************************************************************
 Handle the interpretation of the copy parameter.
***************************************************************************/

bool handle_copy(struct loadparm_context *lp_ctx, int snum,
                        const char *pszParmValue, char **ptr)
{
        bool bRetval;
        struct loadparm_service *serviceTemp = NULL;
        struct loadparm_service *current = NULL;

        bRetval = false;

        DEBUG(3, ("Copying service from service %s\n", pszParmValue));

        serviceTemp = lpcfg_getservicebyname(lp_ctx, pszParmValue);
        if (lp_ctx->s3_fns != NULL) {
                current = lp_ctx->s3_fns->get_servicebynum(snum);
        } else {
                current = lp_ctx->currentService;
        }

        if (current == NULL) {
                DEBUG(0, ("Unable to copy service - invalid service destination"));
                return false;
        }

        if (serviceTemp != NULL) {
                if (serviceTemp == current) {
                        DEBUG(0, ("Can't copy service %s - unable to copy self!\n", pszParmValue));
                } else {
                        copy_service(current,
                                     serviceTemp,
                                     current->copymap);
                        lpcfg_string_set(current, ptr, pszParmValue);

                        bRetval = true;
                }
        } else {
                DEBUG(0, ("Unable to copy service - source not found: %s\n",
                          pszParmValue));
                bRetval = false;
        }

        return bRetval;
}

bool handle_debug_list(struct loadparm_context *lp_ctx, int unused,
                        const char *pszParmValue, char **ptr)
{
        if (lp_ctx->s3_fns != NULL) {
                lp_ctx->s3_fns->lp_string_set(ptr, pszParmValue);
        } else {
                lpcfg_string_set(lp_ctx, ptr, pszParmValue);
        }

        return debug_parse_levels(pszParmValue);
}

bool handle_logfile(struct loadparm_context *lp_ctx, int unused,
                    const char *pszParmValue, char **ptr)
{
        if (lp_ctx->s3_fns != NULL) {
                lp_ctx->s3_fns->lp_string_set(ptr, pszParmValue);
        } else {
                debug_set_logfile(pszParmValue);
                lpcfg_string_set(lp_ctx, ptr, pszParmValue);
        }

        return true;
}

/*
 * These special charset handling methods only run in the source3 code.
 */

bool handle_charset(struct loadparm_context *lp_ctx, int snum,
                        const char *pszParmValue, char **ptr)
{
        if (lp_ctx->s3_fns) {
                if (*ptr == NULL || strcmp(*ptr, pszParmValue) != 0) {
                        lp_ctx->s3_fns->lp_string_set(ptr, pszParmValue);
                        global_iconv_handle = smb_iconv_handle_reinit(NULL,
                                                        lpcfg_dos_charset(lp_ctx),
                                                        lpcfg_unix_charset(lp_ctx),
                                                        true, global_iconv_handle);
                }

                return true;
        }
        return lpcfg_string_set(lp_ctx, ptr, pszParmValue);

}

bool handle_dos_charset(struct loadparm_context *lp_ctx, int snum,
                        const char *pszParmValue, char **ptr)
{
        bool is_utf8 = false;
        size_t len = strlen(pszParmValue);

        if (lp_ctx->s3_fns) {
                if (len == 4 || len == 5) {
                        /* Don't use StrCaseCmp here as we don't want to
                           initialize iconv. */
                        if ((toupper_m(pszParmValue[0]) == 'U') &&
                            (toupper_m(pszParmValue[1]) == 'T') &&
                            (toupper_m(pszParmValue[2]) == 'F')) {
                                if (len == 4) {
                                        if (pszParmValue[3] == '8') {
                                                is_utf8 = true;
                                        }
                                } else {
                                        if (pszParmValue[3] == '-' &&
                                            pszParmValue[4] == '8') {
                                                is_utf8 = true;
                                        }
                                }
                        }
                }

                if (*ptr == NULL || strcmp(*ptr, pszParmValue) != 0) {
                        if (is_utf8) {
                                DEBUG(0,("ERROR: invalid DOS charset: 'dos charset' must not "
                                        "be UTF8, using (default value) %s instead.\n",
                                        DEFAULT_DOS_CHARSET));
                                pszParmValue = DEFAULT_DOS_CHARSET;
                        }
                        lp_ctx->s3_fns->lp_string_set(ptr, pszParmValue);
                        global_iconv_handle = smb_iconv_handle_reinit(NULL,
                                                        lpcfg_dos_charset(lp_ctx),
                                                        lpcfg_unix_charset(lp_ctx),
                                                        true, global_iconv_handle);
                }
                return true;
        }

        return lpcfg_string_set(lp_ctx, ptr, pszParmValue);
}

bool handle_printing(struct loadparm_context *lp_ctx, int snum,
                            const char *pszParmValue, char **ptr)
{
        static int parm_num = -1;
        struct loadparm_service *s;

        if (parm_num == -1) {
                parm_num = lpcfg_map_parameter("printing");
        }

        if (!lp_set_enum_parm(&parm_table[parm_num], pszParmValue, (int*)ptr)) {
                return false;
        }

        if (lp_ctx->s3_fns) {
                if ( snum < 0 ) {
                        s = lp_ctx->sDefault;
                        lp_ctx->s3_fns->init_printer_values(lp_ctx->globals->ctx, s);
                } else {
                        s = lp_ctx->services[snum];
                        lp_ctx->s3_fns->init_printer_values(s, s);
                }
        }

        return true;
}

bool handle_ldap_debug_level(struct loadparm_context *lp_ctx, int snum, const char *pszParmValue, char **ptr)
{
        lp_ctx->globals->ldap_debug_level = lp_int(pszParmValue);

        if (lp_ctx->s3_fns) {
                lp_ctx->s3_fns->init_ldap_debugging();
        }
        return true;
}

bool handle_netbios_aliases(struct loadparm_context *lp_ctx, int snum, const char *pszParmValue, char **ptr)
{
        TALLOC_FREE(lp_ctx->globals->netbios_aliases);
        lp_ctx->globals->netbios_aliases = (const char **)str_list_make_v3(lp_ctx->globals->ctx,
                                                                           pszParmValue, NULL);

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->set_netbios_aliases(lp_ctx->globals->netbios_aliases);
        }
        return true;
}

/*
 * idmap related parameters
 */

bool handle_idmap_backend(struct loadparm_context *lp_ctx, int snum, const char *pszParmValue, char **ptr)
{
        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->lp_do_parameter(snum, "idmap config * : backend", pszParmValue);
        }

        return lpcfg_string_set(lp_ctx, ptr, pszParmValue);
}

bool handle_idmap_uid(struct loadparm_context *lp_ctx, int snum, const char *pszParmValue, char **ptr)
{
        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->lp_do_parameter(snum, "idmap config * : range", pszParmValue);
        }

        return lpcfg_string_set(lp_ctx, ptr, pszParmValue);
}

bool handle_idmap_gid(struct loadparm_context *lp_ctx, int snum, const char *pszParmValue, char **ptr)
{
        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->lp_do_parameter(snum, "idmap config * : range", pszParmValue);
        }

        return lpcfg_string_set(lp_ctx, ptr, pszParmValue);
}

/***************************************************************************
 Initialise a copymap.
***************************************************************************/

void init_copymap(struct loadparm_service *pservice)
{
        int i;

        TALLOC_FREE(pservice->copymap);

        pservice->copymap = bitmap_talloc(NULL, num_parameters());
        if (!pservice->copymap)
                DEBUG(0,
                      ("Couldn't allocate copymap!! (size %d)\n",
                       (int)num_parameters()));
        else
                for (i = 0; i < num_parameters(); i++)
                        bitmap_set(pservice->copymap, i);
}

/**
 * Process a parametric option
 */
static bool lp_do_parameter_parametric(struct loadparm_context *lp_ctx,
                                       struct loadparm_service *service,
                                       const char *pszParmName,
                                       const char *pszParmValue, int flags)
{
        struct parmlist_entry **data;
        char *name;
        TALLOC_CTX *mem_ctx;

        while (isspace((unsigned char)*pszParmName)) {
                pszParmName++;
        }

        name = strlower_talloc(lp_ctx, pszParmName);
        if (!name) return false;

        if (service == NULL) {
                data = &lp_ctx->globals->param_opt;
                mem_ctx = lp_ctx->globals;
        } else {
                data = &service->param_opt;
                mem_ctx = service;
        }

        set_param_opt(mem_ctx, data, name, pszParmValue, flags);

        talloc_free(name);

        return true;
}

static bool set_variable(TALLOC_CTX *mem_ctx, int parmnum, void *parm_ptr,
                         const char *pszParmName, const char *pszParmValue,
                         struct loadparm_context *lp_ctx, bool on_globals)
{
        int i;
        /* if it is a special case then go ahead */
        if (parm_table[parmnum].special) {
                bool ret;
                ret = parm_table[parmnum].special(lp_ctx, -1, pszParmValue,
                                                  (char **)parm_ptr);
                if (!ret) {
                        return false;
                }
                goto mark_non_default;
        }

        /* now switch on the type of variable it is */
        switch (parm_table[parmnum].type)
        {
                case P_BOOL: {
                        bool b;
                        if (!set_boolean(pszParmValue, &b)) {
                                DEBUG(0, ("set_variable(%s): value is not "
                                          "boolean!\n", pszParmValue));
                                return false;
                        }
                        *(bool *)parm_ptr = b;
                        }
                        break;

                case P_BOOLREV: {
                        bool b;
                        if (!set_boolean(pszParmValue, &b)) {
                                DEBUG(0, ("set_variable(%s): value is not "
                                          "boolean!\n", pszParmValue));
                                return false;
                        }
                        *(bool *)parm_ptr = !b;
                        }
                        break;

                case P_INTEGER:
                        *(int *)parm_ptr = atoi(pszParmValue);
                        break;

                case P_CHAR:
                        *(char *)parm_ptr = *pszParmValue;
                        break;

                case P_OCTAL:
                        *(int *)parm_ptr = strtol(pszParmValue, NULL, 8);
                        break;

                case P_BYTES:
                {
                        uint64_t val;
                        if (conv_str_size_error(pszParmValue, &val)) {
                                if (val <= INT_MAX) {
                                        *(int *)parm_ptr = (int)val;
                                        break;
                                }
                        }

                        DEBUG(0, ("set_variable(%s): value is not "
                                  "a valid size specifier!\n", pszParmValue));
                        return false;
                }

                case P_CMDLIST:
                        *(const char * const **)parm_ptr
                                = (const char * const *)str_list_make(mem_ctx,
                                                                      pszParmValue, NULL);
                        break;
                case P_LIST:
                {
                        char **new_list = str_list_make(mem_ctx,
                                                        pszParmValue, NULL);
                        for (i=0; new_list[i]; i++) {
                                if (*(const char ***)parm_ptr != NULL &&
                                    new_list[i][0] == '+' &&
                                    new_list[i][1])
                                {
                                        if (!str_list_check(*(const char ***)parm_ptr,
                                                            &new_list[i][1])) {
                                                *(const char ***)parm_ptr = str_list_add(*(const char ***)parm_ptr,
                                                                                         &new_list[i][1]);
                                        }
                                } else if (*(const char ***)parm_ptr != NULL &&
                                           new_list[i][0] == '-' &&
                                           new_list[i][1])
                                {
                                        str_list_remove(*(const char ***)parm_ptr,
                                                        &new_list[i][1]);
                                } else {
                                        if (i != 0) {
                                                DEBUG(0, ("Unsupported list syntax for: %s = %s\n",
                                                          pszParmName, pszParmValue));
                                                return false;
                                        }
                                        *(const char * const **)parm_ptr = (const char * const *) new_list;
                                        break;
                                }
                        }
                        break;
                }
                case P_STRING:
                        lpcfg_string_set(mem_ctx, (char **)parm_ptr, pszParmValue);
                        break;

                case P_USTRING:
                        lpcfg_string_set_upper(mem_ctx, (char **)parm_ptr, pszParmValue);
                        break;

                case P_ENUM:
                        if (!lp_set_enum_parm(&parm_table[parmnum], pszParmValue, (int*)parm_ptr)) {
                                return false;
                        }
                        break;

                case P_SEP:
                        break;
        }

mark_non_default:
        if (on_globals && (lp_ctx->flags[parmnum] & FLAG_DEFAULT)) {
                lp_ctx->flags[parmnum] &= ~FLAG_DEFAULT;
                /* we have to also unset FLAG_DEFAULT on aliases */
                for (i=parmnum-1;i>=0 && parm_table[i].offset == parm_table[parmnum].offset;i--) {
                        lp_ctx->flags[i] &= ~FLAG_DEFAULT;
                }
                for (i=parmnum+1;i<num_parameters() && parm_table[i].offset == parm_table[parmnum].offset;i++) {
                        lp_ctx->flags[i] &= ~FLAG_DEFAULT;
                }
        }
        return true;
}


bool lpcfg_do_global_parameter(struct loadparm_context *lp_ctx,
                               const char *pszParmName, const char *pszParmValue)
{
        int parmnum = lpcfg_map_parameter(pszParmName);
        void *parm_ptr;

        if (parmnum < 0) {
                if (strchr(pszParmName, ':')) {
                        return lp_do_parameter_parametric(lp_ctx, NULL, pszParmName, pszParmValue, 0);
                }
                DEBUG(0, ("Ignoring unknown parameter \"%s\"\n", pszParmName));
                return true;
        }

        /* if the flag has been set on the command line, then don't allow override,
           but don't report an error */
        if (lp_ctx->flags[parmnum] & FLAG_CMDLINE) {
                return true;
        }

        parm_ptr = lpcfg_parm_ptr(lp_ctx, NULL, &parm_table[parmnum]);

        return set_variable(lp_ctx->globals, parmnum, parm_ptr,
                            pszParmName, pszParmValue, lp_ctx, true);
}

bool lpcfg_do_service_parameter(struct loadparm_context *lp_ctx,
                                struct loadparm_service *service,
                                const char *pszParmName, const char *pszParmValue)
{
        void *parm_ptr;
        int i;
        int parmnum = lpcfg_map_parameter(pszParmName);

        if (parmnum < 0) {
                if (strchr(pszParmName, ':')) {
                        return lp_do_parameter_parametric(lp_ctx, service, pszParmName, pszParmValue, 0);
                }
                DEBUG(0, ("Ignoring unknown parameter \"%s\"\n", pszParmName));
                return true;
        }

        /* if the flag has been set on the command line, then don't allow override,
           but don't report an error */
        if (lp_ctx->flags[parmnum] & FLAG_CMDLINE) {
                return true;
        }

        if (parm_table[parmnum].p_class == P_GLOBAL) {
                DEBUG(0,
                      ("Global parameter %s found in service section!\n",
                       pszParmName));
                return true;
        }
        parm_ptr = ((char *)service) + parm_table[parmnum].offset;

        if (!service->copymap)
                init_copymap(service);

        /* this handles the aliases - set the copymap for other
         * entries with the same data pointer */
        for (i = 0; parm_table[i].label; i++)
                if (parm_table[i].offset == parm_table[parmnum].offset &&
                    parm_table[i].p_class == parm_table[parmnum].p_class)
                        bitmap_clear(service->copymap, i);

        return set_variable(service, parmnum, parm_ptr, pszParmName,
                            pszParmValue, lp_ctx, false);
}

/**
 * Process a parameter.
 */

static bool do_parameter(const char *pszParmName, const char *pszParmValue,
                         void *userdata)
{
        struct loadparm_context *lp_ctx = (struct loadparm_context *)userdata;

        if (lp_ctx->bInGlobalSection)
                return lpcfg_do_global_parameter(lp_ctx, pszParmName,
                                              pszParmValue);
        else
                return lpcfg_do_service_parameter(lp_ctx, lp_ctx->currentService,
                                                  pszParmName, pszParmValue);
}

/*
  variable argument do parameter
*/
bool lpcfg_do_global_parameter_var(struct loadparm_context *lp_ctx, const char *pszParmName, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4);
bool lpcfg_do_global_parameter_var(struct loadparm_context *lp_ctx,
                                const char *pszParmName, const char *fmt, ...)
{
        char *s;
        bool ret;
        va_list ap;

        va_start(ap, fmt);
        s = talloc_vasprintf(NULL, fmt, ap);
        va_end(ap);
        ret = lpcfg_do_global_parameter(lp_ctx, pszParmName, s);
        talloc_free(s);
        return ret;
}


/*
  set a parameter from the commandline - this is called from command line parameter
  parsing code. It sets the parameter then marks the parameter as unable to be modified
  by smb.conf processing
*/
bool lpcfg_set_cmdline(struct loadparm_context *lp_ctx, const char *pszParmName,
                       const char *pszParmValue)
{
        int parmnum;
        int i;

        while (isspace((unsigned char)*pszParmValue)) pszParmValue++;

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->set_cmdline(pszParmName, pszParmValue);
        }

        parmnum = lpcfg_map_parameter(pszParmName);

        if (parmnum < 0 && strchr(pszParmName, ':')) {
                /* set a parametric option */
                return lp_do_parameter_parametric(lp_ctx, NULL, pszParmName,
                                                  pszParmValue, FLAG_CMDLINE);
        }

        if (parmnum < 0) {
                DEBUG(0,("Unknown option '%s'\n", pszParmName));
                return false;
        }

        /* reset the CMDLINE flag in case this has been called before */
        lp_ctx->flags[parmnum] &= ~FLAG_CMDLINE;

        if (!lpcfg_do_global_parameter(lp_ctx, pszParmName, pszParmValue)) {
                return false;
        }

        lp_ctx->flags[parmnum] |= FLAG_CMDLINE;

        /* we have to also set FLAG_CMDLINE on aliases */
        for (i=parmnum-1;
             i>=0 && parm_table[i].p_class == parm_table[parmnum].p_class &&
             parm_table[i].offset == parm_table[parmnum].offset;
             i--) {
                lp_ctx->flags[i] |= FLAG_CMDLINE;
        }
        for (i=parmnum+1;
             i<num_parameters() &&
             parm_table[i].p_class == parm_table[parmnum].p_class &&
             parm_table[i].offset == parm_table[parmnum].offset;
             i++) {
                lp_ctx->flags[i] |= FLAG_CMDLINE;
        }

        return true;
}

/*
  set a option from the commandline in 'a=b' format. Use to support --option
*/
bool lpcfg_set_option(struct loadparm_context *lp_ctx, const char *option)
{
        char *p, *s;
        bool ret;

        s = talloc_strdup(NULL, option);
        if (!s) {
                return false;
        }

        p = strchr(s, '=');
        if (!p) {
                talloc_free(s);
                return false;
        }

        *p = 0;

        ret = lpcfg_set_cmdline(lp_ctx, s, p+1);
        talloc_free(s);
        return ret;
}


#define BOOLSTR(b) ((b) ? "Yes" : "No")

/**
 * Print a parameter of the specified type.
 */

void lpcfg_print_parameter(struct parm_struct *p, void *ptr, FILE * f)
{
        /* For the seperation of lists values that we print below */
        const char *list_sep = ", ";
        int i;
        switch (p->type)
        {
                case P_ENUM:
                        for (i = 0; p->enum_list[i].name; i++) {
                                if (*(int *)ptr == p->enum_list[i].value) {
                                        fprintf(f, "%s",
                                                p->enum_list[i].name);
                                        break;
                                }
                        }
                        break;

                case P_BOOL:
                        fprintf(f, "%s", BOOLSTR(*(bool *)ptr));
                        break;

                case P_BOOLREV:
                        fprintf(f, "%s", BOOLSTR(!*(bool *)ptr));
                        break;

                case P_INTEGER:
                case P_BYTES:
                        fprintf(f, "%d", *(int *)ptr);
                        break;

                case P_CHAR:
                        fprintf(f, "%c", *(char *)ptr);
                        break;

                case P_OCTAL: {
                        int val = *(int *)ptr; 
                        if (val == -1) {
                                fprintf(f, "-1");
                        } else {
                                fprintf(f, "0%03o", val);
                        }
                        break;
                }

                case P_CMDLIST:
                        list_sep = " ";
                        /* fall through */
                case P_LIST:
                        if ((char ***)ptr && *(char ***)ptr) {
                                char **list = *(char ***)ptr;
                                for (; *list; list++) {
                                        /* surround strings with whitespace in double quotes */
                                        if (*(list+1) == NULL) {
                                                /* last item, no extra separator */
                                                list_sep = "";
                                        }
                                        if ( strchr_m( *list, ' ' ) ) {
                                                fprintf(f, "\"%s\"%s", *list, list_sep);
                                        } else {
                                                fprintf(f, "%s%s", *list, list_sep);
                                        }
                                }
                        }
                        break;

                case P_STRING:
                case P_USTRING:
                        if (*(char **)ptr) {
                                fprintf(f, "%s", *(char **)ptr);
                        }
                        break;
                case P_SEP:
                        break;
        }
}

/**
 * Check if two parameters are equal.
 */

 bool lpcfg_equal_parameter(parm_type type, void *ptr1, void *ptr2)
{
        switch (type) {
                case P_BOOL:
                case P_BOOLREV:
                        return (*((bool *)ptr1) == *((bool *)ptr2));

                case P_INTEGER:
                case P_ENUM:
                case P_OCTAL:
                case P_BYTES:
                        return (*((int *)ptr1) == *((int *)ptr2));

                case P_CHAR:
                        return (*((char *)ptr1) == *((char *)ptr2));

                case P_LIST:
                case P_CMDLIST:
                        return str_list_equal(*(const char ***)ptr1, *(const char ***)ptr2);

                case P_STRING:
                case P_USTRING:
                {
                        char *p1 = *(char **)ptr1, *p2 = *(char **)ptr2;
                        if (p1 && !*p1)
                                p1 = NULL;
                        if (p2 && !*p2)
                                p2 = NULL;
                        return (p1 == p2 || strequal(p1, p2));
                }
                case P_SEP:
                        break;
        }
        return false;
}

/**
 * Process a new section (service).
 *
 * At this stage all sections are services.
 * Later we'll have special sections that permit server parameters to be set.
 * Returns True on success, False on failure.
 */

static bool do_section(const char *pszSectionName, void *userdata)
{
        struct loadparm_context *lp_ctx = (struct loadparm_context *)userdata;
        bool bRetval;
        bool isglobal = ((strwicmp(pszSectionName, GLOBAL_NAME) == 0) ||
                         (strwicmp(pszSectionName, GLOBAL_NAME2) == 0));
        bRetval = false;

        /* if we've just struck a global section, note the fact. */
        lp_ctx->bInGlobalSection = isglobal;

        /* check for multiple global sections */
        if (lp_ctx->bInGlobalSection) {
                DEBUG(4, ("Processing section \"[%s]\"\n", pszSectionName));
                return true;
        }

        /* if we have a current service, tidy it up before moving on */
        bRetval = true;

        if (lp_ctx->currentService != NULL)
                bRetval = lpcfg_service_ok(lp_ctx->currentService);

        /* if all is still well, move to the next record in the services array */
        if (bRetval) {
                /* We put this here to avoid an odd message order if messages are */
                /* issued by the post-processing of a previous section. */
                DEBUG(4, ("Processing section \"[%s]\"\n", pszSectionName));

                if ((lp_ctx->currentService = lpcfg_add_service(lp_ctx, lp_ctx->sDefault,
                                                                   pszSectionName))
                    == NULL) {
                        DEBUG(0, ("Failed to add a new service\n"));
                        return false;
                }
        }

        return bRetval;
}


/**
 * Determine if a particular base parameter is currently set to the default value.
 */

static bool is_default(struct loadparm_service *sDefault, int i)
{
        void *def_ptr = ((char *)sDefault) + parm_table[i].offset;
        switch (parm_table[i].type) {
                case P_CMDLIST:
                case P_LIST:
                        return str_list_equal((const char * const *)parm_table[i].def.lvalue,
                                              *(const char ***)def_ptr);
                case P_STRING:
                case P_USTRING:
                        return strequal(parm_table[i].def.svalue,
                                        *(char **)def_ptr);
                case P_BOOL:
                case P_BOOLREV:
                        return parm_table[i].def.bvalue ==
                                *(bool *)def_ptr;
                case P_INTEGER:
                case P_CHAR:
                case P_OCTAL:
                case P_BYTES:
                case P_ENUM:
                        return parm_table[i].def.ivalue ==
                                *(int *)def_ptr;
                case P_SEP:
                        break;
        }
        return false;
}

/**
 *Display the contents of the global structure.
 */

static void dump_globals(struct loadparm_context *lp_ctx, FILE *f,
                         bool show_defaults)
{
        int i;
        struct parmlist_entry *data;

        fprintf(f, "# Global parameters\n[global]\n");

        for (i = 0; parm_table[i].label; i++)
                if (parm_table[i].p_class == P_GLOBAL &&
                    (i == 0 || (parm_table[i].offset != parm_table[i - 1].offset))) {
                        if (!show_defaults && (lp_ctx->flags[i] & FLAG_DEFAULT))
                                continue;
                        fprintf(f, "\t%s = ", parm_table[i].label);
                        lpcfg_print_parameter(&parm_table[i], lpcfg_parm_ptr(lp_ctx, NULL, &parm_table[i]), f);
                        fprintf(f, "\n");
        }
        if (lp_ctx->globals->param_opt != NULL) {
                for (data = lp_ctx->globals->param_opt; data;
                     data = data->next) {
                        if (!show_defaults && (data->priority & FLAG_DEFAULT)) {
                                continue;
                        }
                        fprintf(f, "\t%s = %s\n", data->key, data->value);
                }
        }

}

/**
 * Display the contents of a single services record.
 */

static void dump_a_service(struct loadparm_service * pService, struct loadparm_service *sDefault, FILE * f,
                           unsigned int *flags)
{
        int i;
        struct parmlist_entry *data;

        if (pService != sDefault)
                fprintf(f, "\n[%s]\n", pService->szService);

        for (i = 0; parm_table[i].label; i++) {
                if (parm_table[i].p_class == P_LOCAL &&
                    (*parm_table[i].label != '-') &&
                    (i == 0 || (parm_table[i].offset != parm_table[i - 1].offset)))
                {
                        if (pService == sDefault) {
                                if (flags && (flags[i] & FLAG_DEFAULT)) {
                                        continue;
                                }
                                if (defaults_saved) {
                                        if (is_default(sDefault, i)) {
                                                continue;
                                        }
                                }
                        } else {
                                if (lpcfg_equal_parameter(parm_table[i].type,
                                                          ((char *)pService) +
                                                          parm_table[i].offset,
                                                          ((char *)sDefault) +
                                                          parm_table[i].offset))
                                        continue;
                        }

                        fprintf(f, "\t%s = ", parm_table[i].label);
                        lpcfg_print_parameter(&parm_table[i],
                                        ((char *)pService) + parm_table[i].offset, f);
                        fprintf(f, "\n");
                }
        }
        if (pService->param_opt != NULL) {
                for (data = pService->param_opt; data; data = data->next) {
                        fprintf(f, "\t%s = %s\n", data->key, data->value);
                }
        }
}

bool lpcfg_dump_a_parameter(struct loadparm_context *lp_ctx,
                            struct loadparm_service *service,
                            const char *parm_name, FILE * f)
{
        struct parm_struct *parm;
        void *ptr;
        char *local_parm_name;
        char *parm_opt;
        const char *parm_opt_value;

        /* check for parametrical option */
        local_parm_name = talloc_strdup(lp_ctx, parm_name);
        if (local_parm_name == NULL) {
                return false;
        }

        parm_opt = strchr( local_parm_name, ':');

        if (parm_opt) {
                *parm_opt = '\0';
                parm_opt++;
                if (strlen(parm_opt)) {
                        parm_opt_value = lpcfg_parm_string(lp_ctx, service,
                                local_parm_name, parm_opt);
                        if (parm_opt_value) {
                                fprintf(f, "%s\n", parm_opt_value);
                                return true;
                        }
                }
                return false;
        }

        /* parameter is not parametric, search the table */
        parm = lpcfg_parm_struct(lp_ctx, parm_name);
        if (!parm) {
                return false;
        }

        if (service != NULL && parm->p_class == P_GLOBAL) {
                return false;
        }

        ptr = lpcfg_parm_ptr(lp_ctx, service,parm);

        lpcfg_print_parameter(parm, ptr, f);
        fprintf(f, "\n");
        return true;
}

/**
 * Auto-load some home services.
 */
static void lpcfg_add_auto_services(struct loadparm_context *lp_ctx,
                                    const char *str)
{
        return;
}


/**
 * Unload unused services.
 */

void lpcfg_killunused(struct loadparm_context *lp_ctx,
                   struct smbsrv_connection *smb,
                   bool (*snumused) (struct smbsrv_connection *, int))
{
        int i;
        for (i = 0; i < lp_ctx->iNumServices; i++) {
                if (lp_ctx->services[i] == NULL)
                        continue;

                if (!snumused || !snumused(smb, i)) {
                        talloc_free(lp_ctx->services[i]);
                        lp_ctx->services[i] = NULL;
                }
        }
}


static int lpcfg_destructor(struct loadparm_context *lp_ctx)
{
        struct parmlist_entry *data;

        if (lp_ctx->refuse_free) {
                /* someone is trying to free the
                   global_loadparm_context.
                   We can't allow that. */
                return -1;
        }

        if (lp_ctx->globals->param_opt != NULL) {
                struct parmlist_entry *next;
                for (data = lp_ctx->globals->param_opt; data; data=next) {
                        next = data->next;
                        if (data->priority & FLAG_CMDLINE) continue;
                        DLIST_REMOVE(lp_ctx->globals->param_opt, data);
                        talloc_free(data);
                }
        }

        return 0;
}

/**
 * Initialise the global parameter structure.
 *
 * Note that most callers should use loadparm_init_global() instead
 */
struct loadparm_context *loadparm_init(TALLOC_CTX *mem_ctx)
{
        int i;
        char *myname;
        struct loadparm_context *lp_ctx;
        struct parmlist_entry *parm;
        char *logfile;

        lp_ctx = talloc_zero(mem_ctx, struct loadparm_context);
        if (lp_ctx == NULL)
                return NULL;

        talloc_set_destructor(lp_ctx, lpcfg_destructor);
        lp_ctx->bInGlobalSection = true;
        lp_ctx->globals = talloc_zero(lp_ctx, struct loadparm_global);
        /* This appears odd, but globals in s3 isn't a pointer */
        lp_ctx->globals->ctx = lp_ctx->globals;
        lp_ctx->sDefault = talloc_zero(lp_ctx, struct loadparm_service);
        lp_ctx->flags = talloc_zero_array(lp_ctx, unsigned int, num_parameters());

        lp_ctx->sDefault->iMaxPrintJobs = 1000;
        lp_ctx->sDefault->bAvailable = true;
        lp_ctx->sDefault->browseable = true;
        lp_ctx->sDefault->read_only = true;
        lp_ctx->sDefault->map_archive = true;
        lp_ctx->sDefault->strict_locking = true;
        lp_ctx->sDefault->oplocks = true;
        lp_ctx->sDefault->create_mask = 0744;
        lp_ctx->sDefault->force_create_mode = 0000;
        lp_ctx->sDefault->directory_mask = 0755;
        lp_ctx->sDefault->force_directory_mode = 0000;

        DEBUG(3, ("Initialising global parameters\n"));

        for (i = 0; parm_table[i].label; i++) {
                if ((parm_table[i].type == P_STRING ||
                     parm_table[i].type == P_USTRING) &&
                    !(lp_ctx->flags[i] & FLAG_CMDLINE)) {
                        char **r;
                        if (parm_table[i].p_class == P_LOCAL) {
                                r = (char **)(((char *)lp_ctx->sDefault) + parm_table[i].offset);
                        } else {
                                r = (char **)(((char *)lp_ctx->globals) + parm_table[i].offset);
                        }
                        *r = talloc_strdup(lp_ctx, "");
                }
        }

        logfile = talloc_asprintf(lp_ctx, "%s/log.samba", dyn_LOGFILEBASE);
        lpcfg_do_global_parameter(lp_ctx, "log file", logfile);
        talloc_free(logfile);

        lpcfg_do_global_parameter(lp_ctx, "log level", "0");

        lpcfg_do_global_parameter(lp_ctx, "syslog", "1");
        lpcfg_do_global_parameter(lp_ctx, "syslog only", "No");
        lpcfg_do_global_parameter(lp_ctx, "debug timestamp", "Yes");
        lpcfg_do_global_parameter(lp_ctx, "debug prefix timestamp", "No");
        lpcfg_do_global_parameter(lp_ctx, "debug hires timestamp", "Yes");
        lpcfg_do_global_parameter(lp_ctx, "debug pid", "No");
        lpcfg_do_global_parameter(lp_ctx, "debug uid", "No");
        lpcfg_do_global_parameter(lp_ctx, "debug class", "No");

        lpcfg_do_global_parameter(lp_ctx, "share backend", "classic");

        lpcfg_do_global_parameter(lp_ctx, "server role", "auto");
        lpcfg_do_global_parameter(lp_ctx, "domain logons", "No");
        lpcfg_do_global_parameter(lp_ctx, "domain master", "Auto");

        /* options that can be set on the command line must be initialised via
           the slower lpcfg_do_global_parameter() to ensure that FLAG_CMDLINE is obeyed */
#ifdef TCP_NODELAY
        lpcfg_do_global_parameter(lp_ctx, "socket options", "TCP_NODELAY");
#endif
        lpcfg_do_global_parameter(lp_ctx, "workgroup", DEFAULT_WORKGROUP);
        myname = get_myname(lp_ctx);
        lpcfg_do_global_parameter(lp_ctx, "netbios name", myname);
        talloc_free(myname);
        lpcfg_do_global_parameter(lp_ctx, "name resolve order", "lmhosts wins host bcast");

        lpcfg_do_global_parameter(lp_ctx, "fstype", "NTFS");

        lpcfg_do_global_parameter(lp_ctx, "ntvfs handler", "unixuid default");
        lpcfg_do_global_parameter(lp_ctx, "max connections", "0");

        lpcfg_do_global_parameter(lp_ctx, "dcerpc endpoint servers", "epmapper wkssvc rpcecho samr netlogon lsarpc spoolss drsuapi dssetup unixinfo browser eventlog6 backupkey dnsserver");
        lpcfg_do_global_parameter(lp_ctx, "server services", "s3fs rpc nbt wrepl ldap cldap kdc drepl winbind ntp_signd kcc dnsupdate dns");
        lpcfg_do_global_parameter(lp_ctx, "kccsrv:samba_kcc", "true");
        /* the winbind method for domain controllers is for both RODC
           auth forwarding and for trusted domains */
        lpcfg_do_global_parameter(lp_ctx, "private dir", dyn_PRIVATE_DIR);
        lpcfg_do_global_parameter(lp_ctx, "registry:HKEY_LOCAL_MACHINE", "hklm.ldb");

        /* This hive should be dynamically generated by Samba using
           data from the sam, but for the moment leave it in a tdb to
           keep regedt32 from popping up an annoying dialog. */
        lpcfg_do_global_parameter(lp_ctx, "registry:HKEY_USERS", "hku.ldb");

        /* using UTF8 by default allows us to support all chars */
        lpcfg_do_global_parameter(lp_ctx, "unix charset", "UTF-8");

        /* Use codepage 850 as a default for the dos character set */
        lpcfg_do_global_parameter(lp_ctx, "dos charset", "CP850");

        /*
         * Allow the default PASSWD_CHAT to be overridden in local.h.
         */
        lpcfg_do_global_parameter(lp_ctx, "passwd chat", DEFAULT_PASSWD_CHAT);

        lpcfg_do_global_parameter(lp_ctx, "pid directory", dyn_PIDDIR);
        lpcfg_do_global_parameter(lp_ctx, "lock dir", dyn_LOCKDIR);
        lpcfg_do_global_parameter(lp_ctx, "state directory", dyn_STATEDIR);
        lpcfg_do_global_parameter(lp_ctx, "cache directory", dyn_CACHEDIR);
        lpcfg_do_global_parameter(lp_ctx, "ncalrpc dir", dyn_NCALRPCDIR);

        lpcfg_do_global_parameter(lp_ctx, "nbt client socket address", "0.0.0.0");
        lpcfg_do_global_parameter_var(lp_ctx, "server string",
                                   "Samba %s", SAMBA_VERSION_STRING);

        lpcfg_do_global_parameter(lp_ctx, "password server", "*");

        lpcfg_do_global_parameter(lp_ctx, "max mux", "50");
        lpcfg_do_global_parameter(lp_ctx, "max xmit", "16644");
        lpcfg_do_global_parameter(lp_ctx, "host msdfs", "true");

        lpcfg_do_global_parameter(lp_ctx, "LargeReadwrite", "True");
        lpcfg_do_global_parameter(lp_ctx, "server min protocol", "LANMAN1");
        lpcfg_do_global_parameter(lp_ctx, "server max protocol", "SMB3");
        lpcfg_do_global_parameter(lp_ctx, "client min protocol", "CORE");
        lpcfg_do_global_parameter(lp_ctx, "client max protocol", "NT1");
        lpcfg_do_global_parameter(lp_ctx, "security", "AUTO");
        lpcfg_do_global_parameter(lp_ctx, "EncryptPasswords", "True");
        lpcfg_do_global_parameter(lp_ctx, "ReadRaw", "True");
        lpcfg_do_global_parameter(lp_ctx, "WriteRaw", "True");
        lpcfg_do_global_parameter(lp_ctx, "NullPasswords", "False");
        lpcfg_do_global_parameter(lp_ctx, "old password allowed period", "60");
        lpcfg_do_global_parameter(lp_ctx, "ObeyPamRestrictions", "False");

        lpcfg_do_global_parameter(lp_ctx, "TimeServer", "False");
        lpcfg_do_global_parameter(lp_ctx, "BindInterfacesOnly", "False");
        lpcfg_do_global_parameter(lp_ctx, "Unicode", "True");
        lpcfg_do_global_parameter(lp_ctx, "ClientLanManAuth", "False");
        lpcfg_do_global_parameter(lp_ctx, "ClientNTLMv2Auth", "True");
        lpcfg_do_global_parameter(lp_ctx, "LanmanAuth", "False");
        lpcfg_do_global_parameter(lp_ctx, "NTLMAuth", "True");
        lpcfg_do_global_parameter(lp_ctx, "client use spnego principal", "False");

        lpcfg_do_global_parameter(lp_ctx, "UnixExtensions", "True");

        lpcfg_do_global_parameter(lp_ctx, "PreferredMaster", "Auto");
        lpcfg_do_global_parameter(lp_ctx, "LocalMaster", "True");

        lpcfg_do_global_parameter(lp_ctx, "wins support", "False");
        lpcfg_do_global_parameter(lp_ctx, "dns proxy", "True");

        lpcfg_do_global_parameter(lp_ctx, "winbind separator", "\\");
        lpcfg_do_global_parameter(lp_ctx, "winbind sealed pipes", "True");
        lpcfg_do_global_parameter(lp_ctx, "require strong key", "True");
        lpcfg_do_global_parameter(lp_ctx, "winbindd socket directory", dyn_WINBINDD_SOCKET_DIR);
        lpcfg_do_global_parameter(lp_ctx, "winbindd privileged socket directory", dyn_WINBINDD_PRIVILEGED_SOCKET_DIR);
        lpcfg_do_global_parameter(lp_ctx, "ntp signd socket directory", dyn_NTP_SIGND_SOCKET_DIR);
        lpcfg_do_global_parameter_var(lp_ctx, "dns update command", "%s/samba_dnsupdate", dyn_SCRIPTSBINDIR);
        lpcfg_do_global_parameter_var(lp_ctx, "spn update command", "%s/samba_spnupdate", dyn_SCRIPTSBINDIR);
        lpcfg_do_global_parameter_var(lp_ctx, "samba kcc command",
                                        "%s/samba_kcc", dyn_SCRIPTSBINDIR);
        lpcfg_do_global_parameter(lp_ctx, "template shell", "/bin/false");
        lpcfg_do_global_parameter(lp_ctx, "template homedir", "/home/%WORKGROUP%/%ACCOUNTNAME%");

        lpcfg_do_global_parameter(lp_ctx, "client signing", "default");
        lpcfg_do_global_parameter(lp_ctx, "server signing", "default");

        lpcfg_do_global_parameter(lp_ctx, "use spnego", "True");

        lpcfg_do_global_parameter(lp_ctx, "use mmap", "True");

        lpcfg_do_global_parameter(lp_ctx, "smb ports", "445 139");
        lpcfg_do_global_parameter(lp_ctx, "nbt port", "137");
        lpcfg_do_global_parameter(lp_ctx, "dgram port", "138");
        lpcfg_do_global_parameter(lp_ctx, "cldap port", "389");
        lpcfg_do_global_parameter(lp_ctx, "krb5 port", "88");
        lpcfg_do_global_parameter(lp_ctx, "kpasswd port", "464");
        lpcfg_do_global_parameter(lp_ctx, "web port", "901");

        lpcfg_do_global_parameter(lp_ctx, "nt status support", "True");

        lpcfg_do_global_parameter(lp_ctx, "max wins ttl", "518400"); /* 6 days */
        lpcfg_do_global_parameter(lp_ctx, "min wins ttl", "21600");

        lpcfg_do_global_parameter(lp_ctx, "tls enabled", "True");
        lpcfg_do_global_parameter(lp_ctx, "tls keyfile", "tls/key.pem");
        lpcfg_do_global_parameter(lp_ctx, "tls certfile", "tls/cert.pem");
        lpcfg_do_global_parameter(lp_ctx, "tls cafile", "tls/ca.pem");
        lpcfg_do_global_parameter(lp_ctx, "prefork children:smb", "4");

        lpcfg_do_global_parameter(lp_ctx, "rndc command", "/usr/sbin/rndc");
        lpcfg_do_global_parameter(lp_ctx, "nsupdate command", "/usr/bin/nsupdate -g");

        lpcfg_do_global_parameter(lp_ctx, "allow dns updates", "secure only");
        lpcfg_do_global_parameter(lp_ctx, "dns forwarder", "");

        lpcfg_do_global_parameter(lp_ctx, "algorithmic rid base", "1000");

        lpcfg_do_global_parameter(lp_ctx, "enhanced browsing", "True");

        lpcfg_do_global_parameter(lp_ctx, "winbind nss info", "template");

        lpcfg_do_global_parameter(lp_ctx, "server schannel", "Auto");

        lpcfg_do_global_parameter(lp_ctx, "short preserve case", "True");

        lpcfg_do_global_parameter(lp_ctx, "max open files", "16384");

        lpcfg_do_global_parameter(lp_ctx, "cups connection timeout", "30");

        lpcfg_do_global_parameter(lp_ctx, "locking", "True");

        lpcfg_do_global_parameter(lp_ctx, "block size", "1024");

        lpcfg_do_global_parameter(lp_ctx, "client use spnego", "True");

        lpcfg_do_global_parameter(lp_ctx, "change notify", "True");

        lpcfg_do_global_parameter(lp_ctx, "name cache timeout", "660");

        lpcfg_do_global_parameter(lp_ctx, "defer sharing violations", "True");

        lpcfg_do_global_parameter(lp_ctx, "ldap replication sleep", "1000");

        lpcfg_do_global_parameter(lp_ctx, "idmap backend", "tdb");

        lpcfg_do_global_parameter(lp_ctx, "enable privileges", "True");

        lpcfg_do_global_parameter_var(lp_ctx, "smb2 max write", "%u", DEFAULT_SMB2_MAX_WRITE);

        lpcfg_do_global_parameter(lp_ctx, "passdb backend", "tdbsam");

        lpcfg_do_global_parameter(lp_ctx, "getwd cache", "True");

        lpcfg_do_global_parameter(lp_ctx, "winbind nested groups", "True");

        lpcfg_do_global_parameter(lp_ctx, "mangled names", "True");

        lpcfg_do_global_parameter_var(lp_ctx, "smb2 max credits", "%u", DEFAULT_SMB2_MAX_CREDITS);

        lpcfg_do_global_parameter(lp_ctx, "ldap ssl", "start tls");

        lpcfg_do_global_parameter(lp_ctx, "ldap deref", "auto");

        lpcfg_do_global_parameter(lp_ctx, "lm interval", "60");

        lpcfg_do_global_parameter(lp_ctx, "mangling method", "hash2");

        lpcfg_do_global_parameter(lp_ctx, "hide dot files", "True");

        lpcfg_do_global_parameter(lp_ctx, "browse list", "True");

        lpcfg_do_global_parameter(lp_ctx, "passwd chat timeout", "2");

        lpcfg_do_global_parameter(lp_ctx, "guest account", GUEST_ACCOUNT);

        lpcfg_do_global_parameter(lp_ctx, "client schannel", "auto");

        lpcfg_do_global_parameter(lp_ctx, "smb encrypt", "default");

        lpcfg_do_global_parameter(lp_ctx, "max log size", "5000");

        lpcfg_do_global_parameter(lp_ctx, "idmap negative cache time", "120");

        lpcfg_do_global_parameter(lp_ctx, "ldap follow referral", "auto");

        lpcfg_do_global_parameter(lp_ctx, "multicast dns register", "yes");

        lpcfg_do_global_parameter(lp_ctx, "winbind reconnect delay", "30");

        lpcfg_do_global_parameter(lp_ctx, "nt acl support", "yes");

        lpcfg_do_global_parameter(lp_ctx, "acl check permissions", "yes");

        lpcfg_do_global_parameter(lp_ctx, "keepalive", "300");

        lpcfg_do_global_parameter(lp_ctx, "winbind cache time", "300");

        lpcfg_do_global_parameter(lp_ctx, "level2 oplocks", "yes");

        lpcfg_do_global_parameter(lp_ctx, "show add printer wizard", "yes");

        lpcfg_do_global_parameter(lp_ctx, "allocation roundup size", "1048576");

        lpcfg_do_global_parameter(lp_ctx, "ldap page size", "1024");

        lpcfg_do_global_parameter(lp_ctx, "kernel share modes", "yes");

        lpcfg_do_global_parameter(lp_ctx, "strict locking", "Auto");

        lpcfg_do_global_parameter(lp_ctx, "map readonly", "yes");

        lpcfg_do_global_parameter(lp_ctx, "allow trusted domains", "yes");

        lpcfg_do_global_parameter(lp_ctx, "default devmode", "yes");

        lpcfg_do_global_parameter(lp_ctx, "os level", "20");

        lpcfg_do_global_parameter(lp_ctx, "dos filetimes", "yes");

        lpcfg_do_global_parameter(lp_ctx, "mangling char", "~");

        lpcfg_do_global_parameter(lp_ctx, "printcap cache time", "750");

        lpcfg_do_global_parameter(lp_ctx, "create krb5 conf", "yes");

        lpcfg_do_global_parameter(lp_ctx, "winbind max clients", "200");

        lpcfg_do_global_parameter(lp_ctx, "acl map full control", "yes");

        lpcfg_do_global_parameter(lp_ctx, "nt pipe support", "yes");

        lpcfg_do_global_parameter(lp_ctx, "ldap debug threshold", "10");

        lpcfg_do_global_parameter(lp_ctx, "follow symlinks", "yes");

        lpcfg_do_global_parameter(lp_ctx, "machine password timeout", "604800");

        lpcfg_do_global_parameter(lp_ctx, "ldap connection timeout", "2");

        lpcfg_do_global_parameter(lp_ctx, "winbind expand groups", "1");

        lpcfg_do_global_parameter(lp_ctx, "stat cache", "yes");

        lpcfg_do_global_parameter(lp_ctx, "lpq cache time", "30");

        lpcfg_do_global_parameter_var(lp_ctx, "smb2 max trans", "%u", DEFAULT_SMB2_MAX_TRANSACT);

        lpcfg_do_global_parameter_var(lp_ctx, "smb2 max read", "%u", DEFAULT_SMB2_MAX_READ);

        lpcfg_do_global_parameter(lp_ctx, "durable handles", "yes");

        lpcfg_do_global_parameter(lp_ctx, "max stat cache size", "256");

        lpcfg_do_global_parameter(lp_ctx, "ldap passwd sync", "no");

        lpcfg_do_global_parameter(lp_ctx, "kernel change notify", "yes");

        lpcfg_do_global_parameter(lp_ctx, "max ttl", "259200");

        lpcfg_do_global_parameter(lp_ctx, "blocking locks", "yes");

        lpcfg_do_global_parameter(lp_ctx, "oplock contention limit", "2");

        lpcfg_do_global_parameter(lp_ctx, "load printers", "yes");

        lpcfg_do_global_parameter(lp_ctx, "idmap cache time", "604800");

        lpcfg_do_global_parameter(lp_ctx, "preserve case", "yes");

        lpcfg_do_global_parameter(lp_ctx, "lm announce", "auto");

        lpcfg_do_global_parameter(lp_ctx, "afs token lifetime", "604800");

        lpcfg_do_global_parameter(lp_ctx, "enable core files", "yes");

        lpcfg_do_global_parameter(lp_ctx, "winbind max domain connections", "1");

        lpcfg_do_global_parameter(lp_ctx, "case sensitive", "auto");

        lpcfg_do_global_parameter(lp_ctx, "ldap timeout", "15");

        lpcfg_do_global_parameter(lp_ctx, "mangle prefix", "1");

        lpcfg_do_global_parameter(lp_ctx, "posix locking", "yes");

        lpcfg_do_global_parameter(lp_ctx, "lock spin time", "200");

        lpcfg_do_global_parameter(lp_ctx, "directory name cache size", "100");

        lpcfg_do_global_parameter(lp_ctx, "nmbd bind explicit broadcast", "yes");

        lpcfg_do_global_parameter(lp_ctx, "init logon delay", "100");

        lpcfg_do_global_parameter(lp_ctx, "usershare owner only", "yes");

        lpcfg_do_global_parameter(lp_ctx, "-valid", "yes");

        lpcfg_do_global_parameter_var(lp_ctx, "usershare path", "%s/usershares", get_dyn_STATEDIR());

#ifdef DEVELOPER
        lpcfg_do_global_parameter_var(lp_ctx, "panic action", "/bin/sleep 999999999");
#endif

        lpcfg_do_global_parameter(lp_ctx, "smb passwd file", get_dyn_SMB_PASSWD_FILE());

        lpcfg_do_global_parameter(lp_ctx, "logon home", "\\\\%N\\%U");

        lpcfg_do_global_parameter(lp_ctx, "logon path", "\\\\%N\\%U\\profile");

        lpcfg_do_global_parameter(lp_ctx, "printjob username", "%U");

        for (i = 0; parm_table[i].label; i++) {
                if (!(lp_ctx->flags[i] & FLAG_CMDLINE)) {
                        lp_ctx->flags[i] |= FLAG_DEFAULT;
                }
        }

        for (parm=lp_ctx->globals->param_opt; parm; parm=parm->next) {
                if (!(parm->priority & FLAG_CMDLINE)) {
                        parm->priority |= FLAG_DEFAULT;
                }
        }

        return lp_ctx;
}

/**
 * Initialise the global parameter structure.
 */
struct loadparm_context *loadparm_init_global(bool load_default)
{
        if (global_loadparm_context == NULL) {
                global_loadparm_context = loadparm_init(NULL);
        }
        if (global_loadparm_context == NULL) {
                return NULL;
        }
        global_loadparm_context->global = true;
        if (load_default && !global_loadparm_context->loaded) {
                lpcfg_load_default(global_loadparm_context);
        }
        global_loadparm_context->refuse_free = true;
        return global_loadparm_context;
}

/**
 * Initialise the global parameter structure.
 */
struct loadparm_context *loadparm_init_s3(TALLOC_CTX *mem_ctx, 
                                          const struct loadparm_s3_helpers *s3_fns)
{
        struct loadparm_context *loadparm_context = talloc_zero(mem_ctx, struct loadparm_context);
        if (!loadparm_context) {
                return NULL;
        }
        loadparm_context->s3_fns = s3_fns;
        loadparm_context->globals = s3_fns->globals;
        return loadparm_context;
}

const char *lpcfg_configfile(struct loadparm_context *lp_ctx)
{
        return lp_ctx->szConfigFile;
}

const char *lp_default_path(void)
{
    if (getenv("SMB_CONF_PATH"))
        return getenv("SMB_CONF_PATH");
    else
        return dyn_CONFIGFILE;
}

/**
 * Update the internal state of a loadparm context after settings 
 * have changed.
 */
static bool lpcfg_update(struct loadparm_context *lp_ctx)
{
        struct debug_settings settings;
        TALLOC_CTX *tmp_ctx;

        tmp_ctx = talloc_new(lp_ctx);
        if (tmp_ctx == NULL) {
                return false;
        }

        lpcfg_add_auto_services(lp_ctx, lpcfg_auto_services(lp_ctx, tmp_ctx));

        if (!lp_ctx->globals->wins_server_list && lp_ctx->globals->we_are_a_wins_server) {
                lpcfg_do_global_parameter(lp_ctx, "wins server", "127.0.0.1");
        }

        if (!lp_ctx->global) {
                TALLOC_FREE(tmp_ctx);
                return true;
        }

        panic_action = lp_ctx->globals->panic_action;

        reload_charcnv(lp_ctx);

        ZERO_STRUCT(settings);
        /* Add any more debug-related smb.conf parameters created in
         * future here */
        settings.syslog = lp_ctx->globals->syslog;
        settings.syslog_only = lp_ctx->globals->syslog_only;
        settings.timestamp_logs = lp_ctx->globals->timestamp_logs;
        settings.debug_prefix_timestamp = lp_ctx->globals->debug_prefix_timestamp;
        settings.debug_hires_timestamp = lp_ctx->globals->debug_hires_timestamp;
        settings.debug_pid = lp_ctx->globals->debug_pid;
        settings.debug_uid = lp_ctx->globals->debug_uid;
        settings.debug_class = lp_ctx->globals->debug_class;
        debug_set_settings(&settings);

        /* FIXME: This is a bit of a hack, but we can't use a global, since 
         * not everything that uses lp also uses the socket library */
        if (lpcfg_parm_bool(lp_ctx, NULL, "socket", "testnonblock", false)) {
                setenv("SOCKET_TESTNONBLOCK", "1", 1);
        } else {
                unsetenv("SOCKET_TESTNONBLOCK");
        }

        TALLOC_FREE(tmp_ctx);
        return true;
}

bool lpcfg_load_default(struct loadparm_context *lp_ctx)
{
    const char *path;

    path = lp_default_path();

    if (!file_exist(path)) {
            /* We allow the default smb.conf file to not exist, 
             * basically the equivalent of an empty file. */
            return lpcfg_update(lp_ctx);
    }

    return lpcfg_load(lp_ctx, path);
}

/**
 * Load the services array from the services file.
 *
 * Return True on success, False on failure.
 */
bool lpcfg_load(struct loadparm_context *lp_ctx, const char *filename)
{
        char *n2;
        bool bRetval;

        filename = talloc_strdup(lp_ctx, filename);

        lp_ctx->szConfigFile = filename;

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->load(filename);
        }

        lp_ctx->bInGlobalSection = true;
        n2 = standard_sub_basic(lp_ctx, lp_ctx->szConfigFile);
        DEBUG(2, ("lpcfg_load: refreshing parameters from %s\n", n2));

        add_to_file_list(lp_ctx, &lp_ctx->file_lists, lp_ctx->szConfigFile, n2);

        /* We get sections first, so have to start 'behind' to make up */
        lp_ctx->currentService = NULL;
        bRetval = pm_process(n2, do_section, do_parameter, lp_ctx);

        /* finish up the last section */
        DEBUG(4, ("pm_process() returned %s\n", BOOLSTR(bRetval)));
        if (bRetval)
                if (lp_ctx->currentService != NULL)
                        bRetval = lpcfg_service_ok(lp_ctx->currentService);

        bRetval = bRetval && lpcfg_update(lp_ctx);

        /* we do this unconditionally, so that it happens even
           for a missing smb.conf */
        reload_charcnv(lp_ctx);

        if (bRetval == true) {
                /* set this up so that any child python tasks will
                   find the right smb.conf */
                setenv("SMB_CONF_PATH", filename, 1);

                /* set the context used by the lp_*() function
                   varients */
                global_loadparm_context = lp_ctx;
                lp_ctx->loaded = true;
        }

        return bRetval;
}

/**
 * Return the max number of services.
 */

int lpcfg_numservices(struct loadparm_context *lp_ctx)
{
        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_numservices();
        }

        return lp_ctx->iNumServices;
}

/**
 * Display the contents of the services array in human-readable form.
 */

void lpcfg_dump(struct loadparm_context *lp_ctx, FILE *f, bool show_defaults,
             int maxtoprint)
{
        int iService;

        if (lp_ctx->s3_fns) {
                lp_ctx->s3_fns->dump(f, show_defaults, maxtoprint);
                return;
        }

        defaults_saved = !show_defaults;

        dump_globals(lp_ctx, f, show_defaults);

        dump_a_service(lp_ctx->sDefault, lp_ctx->sDefault, f, lp_ctx->flags);

        for (iService = 0; iService < maxtoprint; iService++)
                lpcfg_dump_one(f, show_defaults, lp_ctx->services[iService], lp_ctx->sDefault);
}

/**
 * Display the contents of one service in human-readable form.
 */
void lpcfg_dump_one(FILE *f, bool show_defaults, struct loadparm_service *service, struct loadparm_service *sDefault)
{
        if (service != NULL) {
                if (service->szService[0] == '\0')
                        return;
                dump_a_service(service, sDefault, f, NULL);
        }
}

struct loadparm_service *lpcfg_servicebynum(struct loadparm_context *lp_ctx,
                                            int snum)
{
        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_servicebynum(snum);
        }

        return lp_ctx->services[snum];
}

struct loadparm_service *lpcfg_service(struct loadparm_context *lp_ctx,
                                    const char *service_name)
{
        int iService;
        char *serviceName;

        if (lp_ctx->s3_fns) {
                return lp_ctx->s3_fns->get_service(service_name);
        }

        for (iService = lp_ctx->iNumServices - 1; iService >= 0; iService--) {
                if (lp_ctx->services[iService] &&
                    lp_ctx->services[iService]->szService) {
                        /*
                         * The substitution here is used to support %U is
                         * service names
                         */
                        serviceName = standard_sub_basic(
                                        lp_ctx->services[iService],
                                        lp_ctx->services[iService]->szService);
                        if (strequal(serviceName, service_name)) {
                                talloc_free(serviceName);
                                return lp_ctx->services[iService];
                        }
                        talloc_free(serviceName);
                }
        }

        DEBUG(7,("lpcfg_servicenumber: couldn't find %s\n", service_name));
        return NULL;
}

const char *lpcfg_servicename(const struct loadparm_service *service)
{
        return lpcfg_string((const char *)service->szService);
}

/**
 * A useful volume label function.
 */
const char *lpcfg_volume_label(struct loadparm_service *service, struct loadparm_service *sDefault)
{
        const char *ret;
        ret = lpcfg_string((const char *)((service != NULL && service->volume != NULL) ?
                                       service->volume : sDefault->volume));
        if (!*ret)
                return lpcfg_servicename(service);
        return ret;
}

/**
 * Return the correct printer name.
 */
const char *lpcfg_printername(struct loadparm_service *service, struct loadparm_service *sDefault)
{
        const char *ret;
        ret = lpcfg_string((const char *)((service != NULL && service->_printername != NULL) ?
                                       service->_printername : sDefault->_printername));
        if (ret == NULL || (ret != NULL && *ret == '\0'))
                ret = lpcfg_servicename(service);

        return ret;
}


/**
 * Return the max print jobs per queue.
 */
int lpcfg_maxprintjobs(struct loadparm_service *service, struct loadparm_service *sDefault)
{
        int maxjobs = (service != NULL) ? service->iMaxPrintJobs : sDefault->iMaxPrintJobs;
        if (maxjobs <= 0 || maxjobs >= PRINT_MAX_JOBID)
                maxjobs = PRINT_MAX_JOBID - 1;

        return maxjobs;
}

struct smb_iconv_handle *lpcfg_iconv_handle(struct loadparm_context *lp_ctx)
{
        if (lp_ctx == NULL) {
                return get_iconv_handle();
        }
        return lp_ctx->iconv_handle;
}

_PUBLIC_ void reload_charcnv(struct loadparm_context *lp_ctx)
{
        struct smb_iconv_handle *old_ic = lp_ctx->iconv_handle;
        if (!lp_ctx->global) {
                return;
        }

        if (old_ic == NULL) {
                old_ic = global_iconv_handle;
        }
        lp_ctx->iconv_handle = smb_iconv_handle_reinit_lp(lp_ctx, lp_ctx, old_ic);
        global_iconv_handle = lp_ctx->iconv_handle;
}

_PUBLIC_ char *lpcfg_tls_keyfile(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
{
        return lpcfg_private_path(mem_ctx, lp_ctx, lpcfg__tls_keyfile(lp_ctx));
}

_PUBLIC_ char *lpcfg_tls_certfile(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
{
        return lpcfg_private_path(mem_ctx, lp_ctx, lpcfg__tls_certfile(lp_ctx));
}

_PUBLIC_ char *lpcfg_tls_cafile(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
{
        return lpcfg_private_path(mem_ctx, lp_ctx, lpcfg__tls_cafile(lp_ctx));
}

_PUBLIC_ char *lpcfg_tls_crlfile(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
{
        return lpcfg_private_path(mem_ctx, lp_ctx, lpcfg__tls_crlfile(lp_ctx));
}

_PUBLIC_ char *lpcfg_tls_dhpfile(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
{
        return lpcfg_private_path(mem_ctx, lp_ctx, lpcfg__tls_dhpfile(lp_ctx));
}

struct gensec_settings *lpcfg_gensec_settings(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx)
{
        struct gensec_settings *settings = talloc_zero(mem_ctx, struct gensec_settings);
        if (settings == NULL)
                return NULL;
        SMB_ASSERT(lp_ctx != NULL);
        settings->lp_ctx = talloc_reference(settings, lp_ctx);
        settings->target_hostname = lpcfg_parm_string(lp_ctx, NULL, "gensec", "target_hostname");
        return settings;
}

int lpcfg_server_role(struct loadparm_context *lp_ctx)
{
        int domain_master = lpcfg__domain_master(lp_ctx);

        return lp_find_server_role(lpcfg__server_role(lp_ctx),
                                   lpcfg__security(lp_ctx),
                                   lpcfg__domain_logons(lp_ctx),
                                   (domain_master == true) ||
                                   (domain_master == Auto));
}

int lpcfg_security(struct loadparm_context *lp_ctx)
{
        return lp_find_security(lpcfg__server_role(lp_ctx),
                                lpcfg__security(lp_ctx));
}

bool lpcfg_server_signing_allowed(struct loadparm_context *lp_ctx, bool *mandatory)
{
        bool allowed = true;
        enum smb_signing_setting signing_setting = lpcfg_server_signing(lp_ctx);

        *mandatory = false;

        if (signing_setting == SMB_SIGNING_DEFAULT) {
                /*
                 * If we are a domain controller, SMB signing is
                 * really important, as it can prevent a number of
                 * attacks on communications between us and the
                 * clients
                 *
                 * However, it really sucks (no sendfile, CPU
                 * overhead) performance-wise when used on a
                 * file server, so disable it by default
                 * on non-DCs
                 */

                if (lpcfg_server_role(lp_ctx) >= ROLE_ACTIVE_DIRECTORY_DC) {
                        signing_setting = SMB_SIGNING_REQUIRED;
                } else {
                        signing_setting = SMB_SIGNING_OFF;
                }
        }

        switch (signing_setting) {
        case SMB_SIGNING_REQUIRED:
                *mandatory = true;
                break;
        case SMB_SIGNING_IF_REQUIRED:
                break;
        case SMB_SIGNING_DEFAULT:
        case SMB_SIGNING_OFF:
                allowed = false;
                break;
        }

        return allowed;
}

int lpcfg_tdb_hash_size(struct loadparm_context *lp_ctx, const char *name)
{
        const char *base;

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

        base = strrchr_m(name, '/');
        if (base != NULL) {
                base += 1;
        } else {
                base = name;
        }
        return lpcfg_parm_int(lp_ctx, NULL, "tdb_hashsize", base, 0);

}

int lpcfg_tdb_flags(struct loadparm_context *lp_ctx, int tdb_flags)
{
        if (!lpcfg_use_mmap(lp_ctx)) {
                tdb_flags |= TDB_NOMMAP;
        }
        return tdb_flags;
}