loadparm.c

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bool lp_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 = 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].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].class == parm_table[parmnum].class)
			service->copymap[i] = false;

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

/**
 * 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 lp_do_global_parameter(lp_ctx, pszParmName,
					      pszParmValue);
	else
		return lp_do_service_parameter(lp_ctx, lp_ctx->currentService,
					       pszParmName, pszParmValue);
}

/*
  variable argument do parameter
*/
bool lp_do_global_parameter_var(struct loadparm_context *lp_ctx, const char *pszParmName, const char *fmt, ...) PRINTF_ATTRIBUTE(3, 4);
bool lp_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 = lp_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 lp_set_cmdline(struct loadparm_context *lp_ctx, const char *pszParmName,
		    const char *pszParmValue)
{
	int parmnum = map_parameter(pszParmName);
	int i;

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


	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 (!lp_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].offset == parm_table[parmnum].offset;i--) {
		lp_ctx->flags[i] |= FLAG_CMDLINE;
	}
	for (i=parmnum+1;i<NUMPARAMETERS && 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 lp_set_option(struct loadparm_context *lp_ctx, const char *option)
{
	char *p, *s;
	bool ret;

	s = strdup(option);
	if (!s) {
		return false;
	}

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

	*p = 0;

	ret = lp_set_cmdline(lp_ctx, s, p+1);
	free(s);
	return ret;
}


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

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

static void print_parameter(struct parm_struct *p, void *ptr, FILE * f)
{
	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)*(int *)ptr));
			break;

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

		case P_OCTAL:
			fprintf(f, "0%o", *(int *)ptr);
			break;

		case P_LIST:
			if ((char ***)ptr && *(char ***)ptr) {
				char **list = *(char ***)ptr;

				for (; *list; list++)
					fprintf(f, "%s%s", *list,
						((*(list+1))?", ":""));
			}
			break;

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

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

static bool equal_parameter(parm_type type, void *ptr1, void *ptr2)
{
	switch (type) {
		case P_BOOL:
			return (*((int *)ptr1) == *((int *)ptr2));

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

		case P_LIST:
			return str_list_equal((const char **)(*(char ***)ptr1),
					      (const char **)(*(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));
		}
	}
	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(3, ("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 = 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(2, ("Processing section \"[%s]\"\n", pszSectionName));

		if ((lp_ctx->currentService = lp_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;
	if (!defaults_saved)
		return false;
	switch (parm_table[i].type) {
		case P_LIST:
			return str_list_equal((const char **)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:
			return parm_table[i].def.bvalue ==
				*(int *)def_ptr;
		case P_INTEGER:
		case P_OCTAL:
		case P_BYTES:
		case P_ENUM:
			return parm_table[i].def.ivalue ==
				*(int *)def_ptr;
	}
	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 param_opt *data;

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

	for (i = 0; parm_table[i].label; i++)
		if (parm_table[i].class == P_GLOBAL &&
		    parm_table[i].offset != -1 &&
		    (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);
			print_parameter(&parm_table[i], lp_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) {
			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)
{
	int i;
	struct param_opt *data;

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

	for (i = 0; parm_table[i].label; i++)
		if (parm_table[i].class == P_LOCAL &&
		    parm_table[i].offset != -1 &&
		    (*parm_table[i].label != '-') &&
		    (i == 0 || (parm_table[i].offset != parm_table[i - 1].offset))) {
			if (pService == sDefault) {
				if (defaults_saved && is_default(sDefault, i))
					continue;
			} else {
				if (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);
			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 lp_dump_a_parameter(struct loadparm_context *lp_ctx,
			 struct loadparm_service *service,
			 const char *parm_name, FILE * f)
{
	struct parm_struct *parm;
	void *ptr;

	parm = lp_parm_struct(parm_name);
	if (!parm) {
		return false;
	}

	ptr = lp_parm_ptr(lp_ctx, service,parm);

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

/**
 * Return info about the next service  in a service. snum==-1 gives the globals.
 * Return NULL when out of parameters.
 */

struct parm_struct *lp_next_parameter(struct loadparm_context *lp_ctx, int snum, int *i, 
				      int allparameters)
{
	if (snum == -1) {
		/* do the globals */
		for (; parm_table[*i].label; (*i)++) {
			if (parm_table[*i].offset == -1
			    || (*parm_table[*i].label == '-'))
				continue;

			if ((*i) > 0
			    && (parm_table[*i].offset ==
				parm_table[(*i) - 1].offset))
				continue;

			return &parm_table[(*i)++];