r9798: Add generic functions for handling smb.conf files (the parameters don't to be pre-declared). Also doesn't use any globals, so multiple files can be loaded at once.

Currently uses the prefix "param" for all functions and structures; suggestions for better ones are welcome...

Remove old smb.conf-parsing code from libsamba3.
(This used to be commit 414e5f7f6d)

source4/param/generic.c

@@ -0,0 +1,231 @@
+/* 
+ *  Unix SMB/CIFS implementation.
+ *  Copyright (C) Jelmer Vernooij			2005
+ *  
+ *  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 2 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, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include "includes.h"
+#include "dlinklist.h"
+#include "param/generic.h"
+
+struct param_section *param_get_section(struct param_context *ctx, const char *name)
+{
+	struct param_section *sect;
+
+	if (name == NULL) 
+		name = GLOBAL_NAME;
+
+	for (sect = ctx->sections; sect; sect = sect->next) {
+		if (!strcasecmp_m(sect->name, name)) 
+			return sect;
+	}
+
+	return NULL;
+}
+
+struct param *param_section_get (struct param_section *section, const char *name)
+{
+	struct param *p;
+
+	for (p = section->parameters; p; p = p->next) {
+		if (strcasecmp(p->name, name) == 0) 
+			return p;
+	}
+
+	return NULL;
+}
+
+struct param *param_get (struct param_context *ctx, const char *section_name, const char *name)
+{
+	struct param_section *section = param_get_section(ctx, section_name);
+	if (section == NULL)
+		return NULL;
+
+	return param_section_get(section, name);
+}
+
+/* Look up parameter. If it is not found, add it */
+static struct param *param_get_add(struct param_context *ctx, const char *section_name, const char *name)
+{
+	struct param_section *section;
+	struct param *p;
+
+	section = param_get_section(ctx, section_name);
+
+	if (section == NULL) {
+		section = talloc_zero(ctx, struct param_section);
+		section->name = talloc_strdup(section, section_name);
+		DLIST_ADD(ctx->sections, section);
+	}
+
+	p = param_section_get(section, name);
+	if (p == NULL) {
+		p = talloc_zero(section, struct param);
+		p->name = talloc_strdup(p, name);
+		DLIST_ADD(section->parameters, p);
+	}
+	
+	return p;
+}
+
+const char *param_get_string(struct param_context *ctx, const char *section, const char *param)
+{
+	struct param *p = param_get(ctx, section, param);
+
+	if (p == NULL)
+		return NULL;
+
+	return p->value;
+}
+
+void param_set_string(struct param_context *ctx, const char *section, const char *param, const char *value)
+{
+	struct param *p = param_get_add(ctx, section, param);
+
+	p->value = talloc_strdup(p, value);
+}
+
+const char **param_get_string_list(struct param_context *ctx, const char *section, const char *param,
+				 const char *separator)
+{
+	struct param *p = param_get(ctx, section, param);
+	
+	if (p == NULL)
+		return NULL;
+	
+	if (p->list_value == NULL) {
+		p->list_value = str_list_make(ctx, p->value, separator);
+	}
+
+	return p->list_value;
+}
+
+void param_set_string_list(struct param_context *ctx, const char *section, const char *param, const char **list)
+{
+	struct param *p = param_get_add(ctx, section, param);	
+
+	p->value = str_list_join(p, list, ' ');
+	p->list_value = str_list_copy(p, list);
+}
+
+int param_get_int(struct param_context *ctx, const char *section, const char *param, int default_v)
+{
+	const char *value = param_get_string(ctx, section, param);
+	
+	if (value)
+		return strtol(value, NULL, 0); 
+
+	return default_v;
+}
+
+void param_set_int(struct param_context *ctx, const char *section, const char *param, int value)
+{
+	struct param *p = param_get_add(ctx, section, param);
+
+	p->value = talloc_asprintf(p, "%d", value);
+}
+
+unsigned long param_get_ulong(struct param_context *ctx, const char *section, const char *param, unsigned long default_v)
+{
+	const char *value = param_get_string(ctx, section, param);
+	
+	if (value)
+		return strtoul(value, NULL, 0);
+
+	return default_v;
+}
+
+void param_set_ulong(struct param_context *ctx, const char *section, const char *name, unsigned long value)
+{
+	struct param *p = param_get_add(ctx, section, name);
+
+	p->value = talloc_asprintf(p, "%lu", value);
+}
+
+static BOOL param_sfunc (const char *name, void *_ctx)
+{
+	struct param_context *ctx = _ctx;
+	struct param_section *section = param_get_section(ctx, name);
+
+	if (section == NULL) {
+		section = talloc_zero(ctx, struct param_section);
+		section->name = talloc_strdup(section, name);
+
+		DLIST_ADD(ctx->sections, section);
+	}
+
+	DLIST_PROMOTE(ctx->sections, section);
+
+	return True;
+}
+
+
+
+static BOOL param_pfunc (const char *name, const char *value, void *_ctx)
+{
+	struct param_context *ctx = _ctx;
+	struct param *p = param_section_get(ctx->sections, name);
+
+	if (!p) {
+		p = talloc_zero(ctx->sections, struct param);
+		p->name = talloc_strdup(p, name);
+		p->value = talloc_strdup(p, value);
+		DLIST_ADD(ctx->sections->parameters, p);
+	} else { /* Replace current value */
+		talloc_free(p->value);
+		p->value = talloc_strdup(p, value);
+	}
+
+	return True;
+}
+
+struct param_context *param_read(TALLOC_CTX *mem_ctx, const char *fn)
+{
+	struct param_context *ctx = talloc_zero(mem_ctx, struct param_context);
+
+	ctx->sections = talloc_zero(ctx, struct param_section);
+	ctx->sections->name = talloc_strdup(ctx->sections, "global");
+	
+	if (!pm_process( fn, param_sfunc, param_pfunc, ctx)) {
+		talloc_free(ctx);
+		return NULL;
+	}
+
+	return ctx;
+}
+
+int param_write(FILE *file, struct param_context *ctx)
+{
+	struct param_section *section;
+
+	if (file == NULL)
+		return -1;
+
+	if (ctx == NULL)
+		return -1;
+	
+	for (section = ctx->sections; section; section = section->next) {
+		struct param *param;
+		
+		fprintf(file, "[%s]\n", section->name);
+		for (param = section->parameters; param; param = param->next) {
+			fprintf(file, "\t%s = %s\n", param->name, param->value);
+		}
+		fprintf(file, "\n");
+	}
+
+	return 0;
+}