source: vendor/current/lib/param/util.c

/* 
   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"
#include "libds/common/roles.h"

/**
 * @file
 * @brief Misc utility functions
 */


bool lpcfg_is_mydomain(struct loadparm_context *lp_ctx,
                             const char *domain)
{
        return strequal(lpcfg_workgroup(lp_ctx), domain);
}

bool lpcfg_is_my_domain_or_realm(struct loadparm_context *lp_ctx,
                             const char *domain)
{
        return strequal(lpcfg_workgroup(lp_ctx), domain) ||
                strequal(lpcfg_realm(lp_ctx), domain);
}

/**
  see if a string matches either our primary or one of our secondary 
  netbios aliases. do a case insensitive match
*/
bool lpcfg_is_myname(struct loadparm_context *lp_ctx, const char *name)
{
        const char **aliases;
        int i;

        if (strcasecmp_m(name, lpcfg_netbios_name(lp_ctx)) == 0) {
                return true;
        }

        aliases = lpcfg_netbios_aliases(lp_ctx);
        for (i=0; aliases && aliases[i]; i++) {
                if (strcasecmp_m(name, aliases[i]) == 0) {
                        return true;
                }
        }

        return false;
}

static char *lpcfg_common_path(TALLOC_CTX* mem_ctx,
                               const char *parent,
                               const char *name)
{
        char *fname, *dname;
        bool ok;

        if (name == NULL) {
                return NULL;
        }
        if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
                return talloc_strdup(mem_ctx, name);
        }

        dname = talloc_strdup(mem_ctx, parent);
        if (dname == NULL) {
                return NULL;
        }
        trim_string(dname,"","/");

        ok = directory_create_or_exist(dname, 0755);
        if (!ok) {
                DEBUG(1, ("Unable to create directory %s for file %s. "
                          "Error was %s\n", dname, name, strerror(errno)));
                return NULL;
        }

        fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
        if (fname == NULL) {
                return dname;
        }
        talloc_free(dname);

        return fname;
}


/**
 A useful function for returning a path in the Samba lock directory.
**/
char *lpcfg_lock_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
                         const char *name)
{
        return lpcfg_common_path(mem_ctx, lpcfg_lock_directory(lp_ctx), name);
}

/**
 A useful function for returning a path in the Samba state directory.
**/
char *lpcfg_state_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
                       const char *name)
{
        return lpcfg_common_path(mem_ctx, lpcfg_state_directory(lp_ctx), name);
}

/**
 A useful function for returning a path in the Samba cache directory.
**/
char *lpcfg_cache_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
                       const char *name)
{
        return lpcfg_common_path(mem_ctx, lpcfg_cache_directory(lp_ctx), name);
}

/**
 * @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 *lpcfg_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, lpcfg_configfile(lp_ctx));
        if (config_dir == NULL) {
                config_dir = talloc_strdup(mem_ctx, lp_default_path());
        }
        p = strrchr(config_dir, '/');
        if (p == NULL) {
                talloc_free(config_dir);
                config_dir = talloc_strdup(mem_ctx, ".");
                if (config_dir == NULL) {
                        return NULL;
                }
        } else {
                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 *lpcfg_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", lpcfg_private_dir(lp_ctx), name);
        return fname;
}

/**
 * @brief Returns an absolute path to a NTDB or TDB file in the Samba
 * private directory.
 *
 * @param name File to find, relative to PRIVATEDIR, without .tdb extension.
 *
 * @retval Pointer to a talloc'ed string containing the full path, for
 * use with dbwrap_local_open().
 **/
char *lpcfg_private_db_path(TALLOC_CTX *mem_ctx,
                            struct loadparm_context *lp_ctx,
                            const char *name)
{
        return talloc_asprintf(mem_ctx, "%s/%s.tdb",
                               lpcfg_private_dir(lp_ctx), name);
}

/**
  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;
        bool ok;

        dname = lpcfg_private_path(mem_ctx, lp_ctx, "smbd.tmp");
        if (dname == NULL) {
                return NULL;
        }

        ok = directory_create_or_exist(dname, 0755);
        if (!ok) {
                return NULL;
        }

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

        fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
        if (fname == NULL) {
                return dname;
        }
        talloc_free(dname);

        return fname;
}

const char *lpcfg_imessaging_path(TALLOC_CTX *mem_ctx,
                                       struct loadparm_context *lp_ctx)
{
        return smbd_tmp_path(mem_ctx, lp_ctx, "msg");
}

struct smb_iconv_handle *smb_iconv_handle_reinit_lp(TALLOC_CTX *mem_ctx,
                                                              struct loadparm_context *lp_ctx,
                                                              struct smb_iconv_handle *old_ic)
{
        return smb_iconv_handle_reinit(mem_ctx, lpcfg_dos_charset(lp_ctx),
                                       lpcfg_unix_charset(lp_ctx),
                                       true,
                                       old_ic);
}


const char *lpcfg_sam_name(struct loadparm_context *lp_ctx)
{
        switch (lpcfg_server_role(lp_ctx)) {
        case ROLE_DOMAIN_BDC:
        case ROLE_DOMAIN_PDC:
        case ROLE_ACTIVE_DIRECTORY_DC:
                return lpcfg_workgroup(lp_ctx);
        default:
                return lpcfg_netbios_name(lp_ctx);
        }
}

void lpcfg_default_kdc_policy(struct loadparm_context *lp_ctx,
                                time_t *svc_tkt_lifetime,
                                time_t *usr_tkt_lifetime,
                                time_t *renewal_lifetime)
{
        long val;

        val = lpcfg_parm_long(lp_ctx, NULL,
                                "kdc", "service ticket lifetime", 10);
        *svc_tkt_lifetime = val * 60 * 60;

        val = lpcfg_parm_long(lp_ctx, NULL,
                                "kdc", "user ticket lifetime", 10);
        *usr_tkt_lifetime = val * 60 * 60;

        val = lpcfg_parm_long(lp_ctx, NULL,
                                "kdc", "renewal lifetime", 24 * 7);
        *renewal_lifetime = val * 60 * 60;
}