source4/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
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 2 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program; if not, write to the Free Software
  22    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  23 */
  24
  25 #include "includes.h"
  26 #include "dynconfig.h"
  27 #include "system/network.h"
  28 #include "system/filesys.h"
  29
  30 /**
  31  * @file
  32  * @brief Misc utility functions
  33  */
  34
  35
  36 /**
  37   see if a string matches either our primary or one of our secondary
  38   netbios aliases. do a case insensitive match
  39 */
  40 _PUBLIC_ BOOL is_myname(const char *name)
  41 {
  42         const char **aliases;
  43         int i;
  44
  45         if (strcasecmp(name, lp_netbios_name()) == 0) {
  46                 return True;
  47         }
  48
  49         aliases = lp_netbios_aliases();
  50         for (i=0; aliases && aliases[i]; i++) {
  51                 if (strcasecmp(name, aliases[i]) == 0) {
  52                         return True;
  53                 }
  54         }
  55
  56         return False;
  57 }
  58
  59
  60 /**
  61  A useful function for returning a path in the Samba lock directory.
  62 **/
  63 _PUBLIC_ char *lock_path(TALLOC_CTX* mem_ctx, const char *name)
  64 {
  65         char *fname, *dname;
  66         if (name == NULL) {
  67                 return NULL;
  68         }
  69         if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
  70                 return talloc_strdup(mem_ctx, name);
  71         }
  72
  73         dname = talloc_strdup(mem_ctx, lp_lockdir());
  74         trim_string(dname,"","/");
  75
  76         if (!directory_exist(dname)) {
  77                 mkdir(dname,0755);
  78         }
  79
  80         fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
  81
  82         talloc_free(dname);
  83
  84         return fname;
  85 }
  86
  87
  88 /**
  89  A useful function for returning a path in the Samba piddir directory.
  90 **/
  91 static char *pid_path(TALLOC_CTX* mem_ctx, const char *name)
  92 {
  93         char *fname, *dname;
  94
  95         dname = talloc_strdup(mem_ctx, lp_piddir());
  96         trim_string(dname,"","/");
  97
  98         if (!directory_exist(dname)) {
  99                 mkdir(dname,0755);
 100         }
 101
 102         fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
 103
 104         talloc_free(dname);
 105
 106         return fname;
 107 }
 108
 109
 110 /**
 111  * @brief Returns an absolute path to a file in the Samba lib directory.
 112  *
 113  * @param name File to find, relative to DATADIR.
 114  *
 115  * @retval Pointer to a talloc'ed string containing the full path.
 116  **/
 117
 118 _PUBLIC_ char *data_path(TALLOC_CTX* mem_ctx, const char *name)
 119 {
 120         char *fname;
 121         fname = talloc_asprintf(mem_ctx, "%s/%s", dyn_DATADIR, name);
 122         return fname;
 123 }
 124
 125 /**
 126  * @brief Returns an absolute path to a file in the directory containing the current config file
 127  *
 128  * @param name File to find, relative to the config file directory.
 129  *
 130  * @retval Pointer to a talloc'ed string containing the full path.
 131  **/
 132
 133 _PUBLIC_ char *config_path(TALLOC_CTX* mem_ctx, const char *name)
 134 {
 135         char *fname, *config_dir, *p;
 136         config_dir = talloc_strdup(mem_ctx, lp_configfile());
 137         p = strrchr(config_dir, '/');
 138         if (!p) {
 139                 return NULL;
 140         }
 141         p[0] = '\0';
 142         fname = talloc_asprintf(mem_ctx, "%s/%s", config_dir, name);
 143         talloc_free(config_dir);
 144         return fname;
 145 }
 146
 147 /**
 148  * @brief Returns an absolute path to a file in the Samba private directory.
 149  *
 150  * @param name File to find, relative to PRIVATEDIR.
 151  * if name is not relative, then use it as-is
 152  *
 153  * @retval Pointer to a talloc'ed string containing the full path.
 154  **/
 155 _PUBLIC_ char *private_path(TALLOC_CTX* mem_ctx, const char *name)
 156 {
 157         char *fname;
 158         if (name == NULL) {
 159                 return NULL;
 160         }
 161         if (name[0] == 0 || name[0] == '/' || strstr(name, ":/")) {
 162                 return talloc_strdup(mem_ctx, name);
 163         }
 164         fname = talloc_asprintf(mem_ctx, "%s/%s", lp_private_dir(), name);
 165         return fname;
 166 }
 167
 168 /**
 169   return a path in the smbd.tmp directory, where all temporary file
 170   for smbd go. If NULL is passed for name then return the directory
 171   path itself
 172 */
 173 _PUBLIC_ char *smbd_tmp_path(TALLOC_CTX *mem_ctx, const char *name)
 174 {
 175         char *fname, *dname;
 176
 177         dname = pid_path(mem_ctx, "smbd.tmp");
 178         if (!directory_exist(dname)) {
 179                 mkdir(dname,0755);
 180         }
 181
 182         if (name == NULL) {
 183                 return dname;
 184         }
 185
 186         fname = talloc_asprintf(mem_ctx, "%s/%s", dname, name);
 187         talloc_free(dname);
 188
 189         return fname;
 190 }
 191
 192 static char *modules_path(TALLOC_CTX* mem_ctx, const char *name)
 193 {
 194         const char *env_moduledir = getenv("LD_SAMBA_MODULE_PATH");
 195         return talloc_asprintf(mem_ctx, "%s/%s",
 196                                                    env_moduledir?env_moduledir:lp_modulesdir(),
 197                                                    name);
 198 }
 199
 200 /**
 201  * Load the initialization functions from DSO files for a specific subsystem.
 202  *
 203  * Will return an array of function pointers to initialization functions
 204  */
 205
 206 _PUBLIC_ init_module_fn *load_samba_modules(TALLOC_CTX *mem_ctx, const char *subsystem)
 207 {
 208         char *path = modules_path(mem_ctx, subsystem);
 209         init_module_fn *ret;
 210
 211         ret = load_modules(mem_ctx, path);
 212
 213         talloc_free(path);
 214
 215         return ret;
 216 }
 217
 218