lib/param/util.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Samba utility functions
   4    Copyright (C) Andrew Tridgell 1992-1998
   5    Copyright (C) Jeremy Allison 2001-2002
   6    Copyright (C) Simo Sorce 2001
   7    Copyright (C) Jim McDonough (jmcd@us.ibm.com)  2003.
   8    Copyright (C) James J Myers 2003
   9    Copyright (C) Jelmer Vernooij 2005-2007
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  23 */
  24
  25 #include "includes.h"
  26 #include "dynconfig/dynconfig.h"
  27 #include "system/network.h"
  28 #include "system/filesys.h"
  29 #include "system/dir.h"
  30 #include "param/param.h"
  31
  32 /**
  33  * @file
  34  * @brief Misc utility functions
  35  */
  36
  37
  38 bool lpcfg_is_mydomain(struct loadparm_context *lp_ctx,
  39                              const char *domain)
  40 {
  41         return strequal(lpcfg_workgroup(lp_ctx), domain);
  42 }
  43
  44 bool lpcfg_is_my_domain_or_realm(struct loadparm_context *lp_ctx,
  45                              const char *domain)
  46 {
  47         return strequal(lpcfg_workgroup(lp_ctx), domain) ||
  48                 strequal(lpcfg_realm(lp_ctx), domain);
  49 }
  50
  51 /**
  52   see if a string matches either our primary or one of our secondary
  53   netbios aliases. do a case insensitive match
  54 */
  55 bool lpcfg_is_myname(struct loadparm_context *lp_ctx, const char *name)
  56 {
  57         const char **aliases;
  58         int i;
  59
  60         if (strcasecmp_m(name, lpcfg_netbios_name(lp_ctx)) == 0) {
  61                 return true;
  62         }
  63
  64         aliases = lpcfg_netbios_aliases(lp_ctx);
  65         for (i=0; aliases && aliases[i]; i++) {
  66                 if (strcasecmp_m(name, aliases[i]) == 0) {
  67                         return true;
  68                 }
  69         }
  70
  71         return false;
  72 }
  73
  74 static char *lpcfg_common_path(TALLOC_CTX* mem_ctx,
  75                                const char *parent,
  76                                const char *name)
  77 {
  78         char *fname, *dname;
  79         bool ok;
  80
  81         if (name == NULL) {
  82                 return NULL;
  83         }
  84         if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
  85                 return talloc_strdup(mem_ctx, name);
  86         }
  87
  88         dname = talloc_strdup(mem_ctx, parent);
  89         if (dname == NULL) {
  90                 return NULL;
  91         }
  92         trim_string(dname,"","/");
  93
  94         ok = directory_create_or_exist(dname, geteuid(), 0755);
  95         if (!ok) {
  96                 DEBUG(1, ("Unable to create directory %s for file %s. "
  97                           "Error was %s\n", dname, name, strerror(errno)));
  98                 return NULL;
  99         }
 100
 101         fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
 102         if (fname == NULL) {
 103                 return dname;
 104         }
 105         talloc_free(dname);
 106
 107         return fname;
 108 }
 109
 110
 111 /**
 112  A useful function for returning a path in the Samba lock directory.
 113 **/
 114 char *lpcfg_lock_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
 115                          const char *name)
 116 {
 117         return lpcfg_common_path(mem_ctx, lpcfg_lockdir(lp_ctx), name);
 118 }
 119
 120 /**
 121  A useful function for returning a path in the Samba state directory.
 122 **/
 123 char *lpcfg_state_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
 124                        const char *name)
 125 {
 126         return lpcfg_common_path(mem_ctx, lpcfg_statedir(lp_ctx), name);
 127 }
 128
 129 /**
 130  A useful function for returning a path in the Samba cache directory.
 131 **/
 132 char *lpcfg_cache_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
 133                        const char *name)
 134 {
 135         return lpcfg_common_path(mem_ctx, lpcfg_cachedir(lp_ctx), name);
 136 }
 137
 138 /**
 139  * @brief Returns an absolute path to a file in the directory containing the current config file
 140  *
 141  * @param name File to find, relative to the config file directory.
 142  *
 143  * @retval Pointer to a talloc'ed string containing the full path.
 144  **/
 145
 146 char *lpcfg_config_path(TALLOC_CTX* mem_ctx, struct loadparm_context *lp_ctx,
 147                            const char *name)
 148 {
 149         char *fname, *config_dir, *p;
 150         config_dir = talloc_strdup(mem_ctx, lpcfg_configfile(lp_ctx));
 151         if (config_dir == NULL) {
 152                 config_dir = talloc_strdup(mem_ctx, lp_default_path());
 153         }
 154         p = strrchr(config_dir, '/');
 155         if (p == NULL) {
 156                 talloc_free(config_dir);
 157                 config_dir = talloc_strdup(mem_ctx, ".");
 158                 if (config_dir == NULL) {
 159                         return NULL;
 160                 }
 161         } else {
 162                 p[0] = '\0';
 163         }
 164         fname = talloc_asprintf(mem_ctx, "%s/%s", config_dir, name);
 165         talloc_free(config_dir);
 166         return fname;
 167 }
 168
 169 /**
 170  * @brief Returns an absolute path to a file in the Samba private directory.
 171  *
 172  * @param name File to find, relative to PRIVATEDIR.
 173  * if name is not relative, then use it as-is
 174  *
 175  * @retval Pointer to a talloc'ed string containing the full path.
 176  **/
 177 char *lpcfg_private_path(TALLOC_CTX* mem_ctx,
 178                             struct loadparm_context *lp_ctx,
 179                             const char *name)
 180 {
 181         char *fname;
 182         if (name == NULL) {
 183                 return NULL;
 184         }
 185         if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
 186                 return talloc_strdup(mem_ctx, name);
 187         }
 188         fname = talloc_asprintf(mem_ctx, "%s/%s", lpcfg_private_dir(lp_ctx), name);
 189         return fname;
 190 }
 191
 192 /**
 193  * @brief Returns an absolute path to a NTDB or TDB file in the Samba
 194  * private directory.
 195  *
 196  * @param name File to find, relative to PRIVATEDIR, without .(n)tdb extension.
 197  * Only provide fixed-string names which are supposed to change with "use ntdb"
 198  * option.
 199  *
 200  * @retval Pointer to a talloc'ed string containing the full path, for
 201  * use with dbwrap_local_open().
 202  **/
 203 char *lpcfg_private_db_path(TALLOC_CTX *mem_ctx,
 204                             struct loadparm_context *lp_ctx,
 205                             const char *name)
 206 {
 207         const char *extension = ".tdb";
 208
 209 #ifndef DISABLE_NTDB
 210         if (lpcfg_use_ntdb(lp_ctx)) {
 211                 extension = ".ntdb";
 212         }
 213 #endif
 214
 215         return talloc_asprintf(mem_ctx, "%s/%s%s",
 216                                lpcfg_private_dir(lp_ctx), name, extension);
 217 }
 218
 219 /**
 220   return a path in the smbd.tmp directory, where all temporary file
 221   for smbd go. If NULL is passed for name then return the directory
 222   path itself
 223 */
 224 char *smbd_tmp_path(TALLOC_CTX *mem_ctx,
 225                              struct loadparm_context *lp_ctx,
 226                              const char *name)
 227 {
 228         char *fname, *dname;
 229         bool ok;
 230
 231         dname = lpcfg_private_path(mem_ctx, lp_ctx, "smbd.tmp");
 232         if (dname == NULL) {
 233                 return NULL;
 234         }
 235
 236         ok = directory_create_or_exist(dname, geteuid(), 0755);
 237         if (!ok) {
 238                 return NULL;
 239         }
 240
 241         if (name == NULL) {
 242                 return dname;
 243         }
 244
 245         fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
 246         if (fname == NULL) {
 247                 return dname;
 248         }
 249         talloc_free(dname);
 250
 251         return fname;
 252 }
 253
 254 const char *lpcfg_imessaging_path(TALLOC_CTX *mem_ctx,
 255                                        struct loadparm_context *lp_ctx)
 256 {
 257         return smbd_tmp_path(mem_ctx, lp_ctx, "msg");
 258 }
 259
 260 struct smb_iconv_handle *smb_iconv_handle_reinit_lp(TALLOC_CTX *mem_ctx,
 261                                                               struct loadparm_context *lp_ctx,
 262                                                               struct smb_iconv_handle *old_ic)
 263 {
 264         return smb_iconv_handle_reinit(mem_ctx, lpcfg_dos_charset(lp_ctx),
 265                                        lpcfg_unix_charset(lp_ctx),
 266                                        true,
 267                                        old_ic);
 268 }
 269
 270
 271 const char *lpcfg_sam_name(struct loadparm_context *lp_ctx)
 272 {
 273         switch (lpcfg_server_role(lp_ctx)) {
 274         case ROLE_DOMAIN_BDC:
 275         case ROLE_DOMAIN_PDC:
 276         case ROLE_ACTIVE_DIRECTORY_DC:
 277                 return lpcfg_workgroup(lp_ctx);
 278         default:
 279                 return lpcfg_netbios_name(lp_ctx);
 280         }
 281 }
 282
 283 void lpcfg_default_kdc_policy(struct loadparm_context *lp_ctx,
 284                                 time_t *svc_tkt_lifetime,
 285                                 time_t *usr_tkt_lifetime,
 286                                 time_t *renewal_lifetime)
 287 {
 288         long val;
 289
 290         val = lpcfg_parm_long(lp_ctx, NULL,
 291                                 "kdc", "service ticket lifetime", 10);
 292         *svc_tkt_lifetime = val * 60 * 60;
 293
 294         val = lpcfg_parm_long(lp_ctx, NULL,
 295                                 "kdc", "user ticket lifetime", 10);
 296         *usr_tkt_lifetime = val * 60 * 60;
 297
 298         val = lpcfg_parm_long(lp_ctx, NULL,
 299                                 "kdc", "renewal lifetime", 24 * 7);
 300         *renewal_lifetime = val * 60 * 60;
 301 }