1 files changed, 297 insertions, 0 deletions
diff --git a/source4/param/util.c b/source4/param/util.c
new file mode 100644
index 0000000000..ec192939d0
--- /dev/null
+++ b/source4/param/util.c
@@ -0,0 +1,297 @@
+/* 
+   Unix SMB/CIFS implementation.
+   Samba utility functions
+   Copyright (C) Andrew Tridgell 1992-1998
+   Copyright (C) Jeremy Allison 2001-2002
+   Copyright (C) Simo Sorce 2001
+   Copyright (C) Jim McDonough (jmcd@us.ibm.com)  2003.
+   Copyright (C) James J Myers 2003
+   Copyright (C) Jelmer Vernooij 2005-2007
+   
+   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/>.
+*/
+
+#include "includes.h"
+#include "dynconfig/dynconfig.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "system/dir.h"
+#include "param/param.h"
+
+/**
+ * @file
+ * @brief Misc utility functions
+ */
+
+
+bool lp_is_mydomain(struct loadparm_context *lp_ctx, 
+			     const char *domain)
+{
+	return strequal(lp_workgroup(lp_ctx), domain);
+}
+
+/**
+  see if a string matches either our primary or one of our secondary 
+  netbios aliases. do a case insensitive match
+*/
+bool lp_is_myname(struct loadparm_context *lp_ctx, const char *name)
+{
+	const char **aliases;
+	int i;
+
+	if (strcasecmp(name, lp_netbios_name(lp_ctx)) == 0) {
+		return true;
+	}
+
+	aliases = lp_netbios_aliases(lp_ctx);
+	for (i=0; aliases && aliases[i]; i++) {
+		if (strcasecmp(name, aliases[i]) == 0) {
+			return true;
+		}
+	}
+
+	return false;
+}
+
+
+/**
+ A useful function for returning a path in the Samba lock directory.
+**/
+char *lock_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
+			 const char *name)
+{
+	char *fname, *dname;
+	if (name == NULL) {
+		return NULL;
+	}
+	if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
+		return talloc_strdup(mem_ctx, name);
+	}
+
+	dname = talloc_strdup(mem_ctx, lp_lockdir(lp_ctx));
+	trim_string(dname,"","/");
+	
+	if (!directory_exist(dname)) {
+		mkdir(dname,0755);
+	}
+	
+	fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
+
+	talloc_free(dname);
+
+	return fname;
+}
+
+/**
+ * @brief Returns an absolute path to a file in the directory containing the current config file
+ *
+ * @param name File to find, relative to the config file directory.
+ *
+ * @retval Pointer to a talloc'ed string containing the full path.
+ **/
+
+char *config_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
+			   const char *name)
+{
+	char *fname, *config_dir, *p;
+	config_dir = talloc_strdup(mem_ctx, lp_configfile(lp_ctx));
+	if (config_dir == NULL) {
+		return NULL;
+	}
+	p = strrchr(config_dir, '/');
+	if (p == NULL) {
+		return NULL;
+	}
+	p[0] = '\0';
+	fname = talloc_asprintf(mem_ctx, "%s/%s", config_dir, name);
+	talloc_free(config_dir);
+	return fname;
+}
+
+/**
+ * @brief Returns an absolute path to a file in the Samba private directory.
+ *
+ * @param name File to find, relative to PRIVATEDIR.
+ * if name is not relative, then use it as-is
+ *
+ * @retval Pointer to a talloc'ed string containing the full path.
+ **/
+char *private_path(TALLOC_CTX* mem_ctx, 
+			    struct loadparm_context *lp_ctx,
+			    const char *name)
+{
+	char *fname;
+	if (name == NULL) {
+		return NULL;
+	}
+	if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
+		return talloc_strdup(mem_ctx, name);
+	}
+	fname = talloc_asprintf(mem_ctx, "%s/%s", lp_private_dir(lp_ctx), name);
+	return fname;
+}
+
+/**
+  return a path in the smbd.tmp directory, where all temporary file
+  for smbd go. If NULL is passed for name then return the directory 
+  path itself
+*/
+char *smbd_tmp_path(TALLOC_CTX *mem_ctx, 
+			     struct loadparm_context *lp_ctx, 
+			     const char *name)
+{
+	char *fname, *dname;
+
+	dname = private_path(mem_ctx, lp_ctx, "smbd.tmp");
+	if (!directory_exist(dname)) {
+		mkdir(dname,0755);
+	}
+
+	if (name == NULL) {
+		return dname;
+	}
+
+	fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
+	talloc_free(dname);
+
+	return fname;
+}
+
+/**
+ * Obtain the init function from a shared library file
+ */
+init_module_fn load_module(TALLOC_CTX *mem_ctx, const char *path)
+{
+	void *handle;
+	void *init_fn;
+
+	handle = dlopen(path, RTLD_NOW);
+	if (handle == NULL) {
+		DEBUG(0, ("Unable to open %s: %s\n", path, dlerror()));
+		return NULL;
+	}
+
+	init_fn = dlsym(handle, SAMBA_INIT_MODULE);
+
+	if (init_fn == NULL) {
+		DEBUG(0, ("Unable to find init_module() in %s: %s\n", path, dlerror()));
+		DEBUG(1, ("Loading module '%s' failed\n", path));
+		dlclose(handle);
+		return NULL;
+	}
+
+	return (init_module_fn)init_fn;
+}
+
+/**
+ * Obtain list of init functions from the modules in the specified
+ * directory
+ */
+init_module_fn *load_modules(TALLOC_CTX *mem_ctx, const char *path)
+{
+	DIR *dir;
+	struct dirent *entry;
+	char *filename;
+	int success = 0;
+	init_module_fn *ret = talloc_array(mem_ctx, init_module_fn, 2);
+
+	ret[0] = NULL;
+	
+	dir = opendir(path);
+	if (dir == NULL) {
+		talloc_free(ret);
+		return NULL;
+	}
+
+	while((entry = readdir(dir))) {
+		if (ISDOT(entry->d_name) || ISDOTDOT(entry->d_name))
+			continue;
+
+		filename = talloc_asprintf(mem_ctx, "%s/%s", path, entry->d_name);
+
+		ret[success] = load_module(mem_ctx, filename);
+		if (ret[success]) {
+			ret = talloc_realloc(mem_ctx, ret, init_module_fn, success+2);
+			success++;
+			ret[success] = NULL;
+		}
+
+		talloc_free(filename);
+	}
+
+	closedir(dir);
+
+	return ret;
+}
+
+/**
+ * Run the specified init functions.
+ *
+ * @return true if all functions ran successfully, false otherwise
+ */
+bool run_init_functions(init_module_fn *fns)
+{
+	int i;
+	bool ret = true;
+	
+	if (fns == NULL)
+		return true;
+	
+	for (i = 0; fns[i]; i++) { ret &= (bool)NT_STATUS_IS_OK(fns[i]()); }
+
+	return ret;
+}
+
+static char *modules_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
+			  const char *name)
+{
+	const char *env_moduledir = getenv("LD_SAMBA_MODULE_PATH");
+	return talloc_asprintf(mem_ctx, "%s/%s", 
+			       env_moduledir?env_moduledir:lp_modulesdir(lp_ctx), 
+			       name);
+}
+
+/**
+ * Load the initialization functions from DSO files for a specific subsystem.
+ *
+ * Will return an array of function pointers to initialization functions
+ */
+
+init_module_fn *load_samba_modules(TALLOC_CTX *mem_ctx, struct loadparm_context *lp_ctx, const char *subsystem)
+{
+	char *path = modules_path(mem_ctx, lp_ctx, subsystem);
+	init_module_fn *ret;
+
+	ret = load_modules(mem_ctx, path);
+
+	talloc_free(path);
+
+	return ret;
+}
+
+const char *lp_messaging_path(TALLOC_CTX *mem_ctx, 
+				       struct loadparm_context *lp_ctx)
+{
+	return smbd_tmp_path(mem_ctx, lp_ctx, "messaging");
+}
+
+struct smb_iconv_convenience *smb_iconv_convenience_init_lp(TALLOC_CTX *mem_ctx,
+							 struct loadparm_context *lp_ctx)
+{
+	return smb_iconv_convenience_init(mem_ctx, lp_dos_charset(lp_ctx),
+					  lp_unix_charset(lp_ctx),
+		lp_parm_bool(lp_ctx, NULL, "iconv", "native", true));
+}
+
+