source4/param/generic.c

   1 /*
   2  *  Unix SMB/CIFS implementation.
   3  *  Copyright (C) Jelmer Vernooij                       2005
   4  *
   5  *  This program is free software; you can redistribute it and/or modify
   6  *  it under the terms of the GNU General Public License as published by
   7  *  the Free Software Foundation; either version 3 of the License, or
   8  *  (at your option) any later version.
   9  *
  10  *  This program is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  *  GNU General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU General Public License
  16  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  17  */
  18
  19 #include "includes.h"
  20 #include "../lib/util/dlinklist.h"
  21 #include "param/param.h"
  22 #include "param/loadparm.h"
  23 #include "system/filesys.h"
  24
  25 struct param_section *param_get_section(struct param_context *ctx, const char *name)
  26 {
  27         struct param_section *sect;
  28
  29         if (name == NULL)
  30                 name = GLOBAL_NAME;
  31
  32         for (sect = ctx->sections; sect; sect = sect->next) {
  33                 if (!strcasecmp_m(sect->name, name))
  34                         return sect;
  35         }
  36
  37         return NULL;
  38 }
  39
  40 struct param_opt *param_section_get(struct param_section *section,
  41                                     const char *name)
  42 {
  43         struct param_opt *p;
  44
  45         for (p = section->parameters; p; p = p->next) {
  46                 if (strcasecmp_m(p->key, name) == 0)
  47                         return p;
  48         }
  49
  50         return NULL;
  51 }
  52
  53 struct param_opt *param_get (struct param_context *ctx, const char *name, const char *section_name)
  54 {
  55         struct param_section *section = param_get_section(ctx, section_name);
  56         if (section == NULL)
  57                 return NULL;
  58
  59         return param_section_get(section, name);
  60 }
  61
  62 struct param_section *param_add_section(struct param_context *ctx, const char *section_name)
  63 {
  64         struct param_section *section;
  65         section = talloc_zero(ctx, struct param_section);
  66         if (section == NULL)
  67                 return NULL;
  68
  69         section->name = talloc_strdup(section, section_name);
  70         DLIST_ADD_END(ctx->sections, section, struct param_section *);
  71         return section;
  72 }
  73
  74 /* Look up parameter. If it is not found, add it */
  75 struct param_opt *param_get_add(struct param_context *ctx, const char *name, const char *section_name)
  76 {
  77         struct param_section *section;
  78         struct param_opt *p;
  79
  80         SMB_ASSERT(section_name != NULL);
  81         SMB_ASSERT(name != NULL);
  82
  83         section = param_get_section(ctx, section_name);
  84
  85         if (section == NULL) {
  86                 section = param_add_section(ctx, section_name);
  87         }
  88
  89         p = param_section_get(section, name);
  90         if (p == NULL) {
  91                 p = talloc_zero(section, struct param_opt);
  92                 if (p == NULL)
  93                         return NULL;
  94
  95                 p->key = talloc_strdup(p, name);
  96                 DLIST_ADD_END(section->parameters, p, struct param_opt *);
  97         }
  98
  99         return p;
 100 }
 101
 102 const char *param_get_string(struct param_context *ctx, const char *param, const char *section)
 103 {
 104         struct param_opt *p = param_get(ctx, param, section);
 105
 106         if (p == NULL)
 107                 return NULL;
 108
 109         return p->value;
 110 }
 111
 112 int param_set_string(struct param_context *ctx, const char *param, const char *value, const char *section)
 113 {
 114         struct param_opt *p = param_get_add(ctx, param, section);
 115
 116         if (p == NULL)
 117                 return -1;
 118
 119         p->value = talloc_strdup(p, value);
 120
 121         return 0;
 122 }
 123
 124 const char **param_get_string_list(struct param_context *ctx, const char *param, const char *separator, const char *section)
 125 {
 126         struct param_opt *p = param_get(ctx, param, section);
 127
 128         if (p == NULL)
 129                 return NULL;
 130
 131         return (const char **)str_list_make(ctx, p->value, separator);
 132 }
 133
 134 int param_set_string_list(struct param_context *ctx, const char *param, const char **list, const char *section)
 135 {
 136         struct param_opt *p = param_get_add(ctx, param, section);
 137
 138         p->value = str_list_join(p, list, ' ');
 139
 140         return 0;
 141 }
 142
 143 int param_get_int(struct param_context *ctx, const char *param, int default_v, const char *section)
 144 {
 145         const char *value = param_get_string(ctx, param, section);
 146
 147         if (value)
 148                 return strtol(value, NULL, 0);
 149
 150         return default_v;
 151 }
 152
 153 void param_set_int(struct param_context *ctx, const char *param, int value, const char *section)
 154 {
 155         struct param_opt *p = param_get_add(ctx, section, param);
 156
 157         if (!p)
 158                 return;
 159
 160         p->value = talloc_asprintf(p, "%d", value);
 161 }
 162
 163 unsigned long param_get_ulong(struct param_context *ctx, const char *param, unsigned long default_v, const char *section)
 164 {
 165         const char *value = param_get_string(ctx, param, section);
 166
 167         if (value)
 168                 return strtoul(value, NULL, 0);
 169
 170         return default_v;
 171 }
 172
 173 void param_set_ulong(struct param_context *ctx, const char *name, unsigned long value, const char *section)
 174 {
 175         struct param_opt *p = param_get_add(ctx, name, section);
 176
 177         if (!p)
 178                 return;
 179
 180         p->value = talloc_asprintf(p, "%lu", value);
 181 }
 182
 183 static bool param_sfunc (const char *name, void *_ctx)
 184 {
 185         struct param_context *ctx = (struct param_context *)_ctx;
 186         struct param_section *section = param_get_section(ctx, name);
 187
 188         if (section == NULL) {
 189                 section = talloc_zero(ctx, struct param_section);
 190                 if (section == NULL)
 191                         return false;
 192
 193                 section->name = talloc_strdup(section, name);
 194
 195                 DLIST_ADD_END(ctx->sections, section, struct param_section *);
 196         }
 197
 198         /* Make sure this section is on top of the list for param_pfunc */
 199         DLIST_PROMOTE(ctx->sections, section);
 200
 201         return true;
 202 }
 203
 204 static bool param_pfunc (const char *name, const char *value, void *_ctx)
 205 {
 206         struct param_context *ctx = (struct param_context *)_ctx;
 207         struct param_opt *p = param_section_get(ctx->sections, name);
 208
 209         if (!p) {
 210                 p = talloc_zero(ctx->sections, struct param_opt);
 211                 if (p == NULL)
 212                         return false;
 213
 214                 p->key = talloc_strdup(p, name);
 215                 p->value = talloc_strdup(p, value);
 216                 DLIST_ADD(ctx->sections->parameters, p);
 217         } else { /* Replace current value */
 218                 talloc_free(p->value);
 219                 p->value = talloc_strdup(p, value);
 220         }
 221
 222         return true;
 223 }
 224
 225 struct param_context *param_init(TALLOC_CTX *mem_ctx)
 226 {
 227         return talloc_zero(mem_ctx, struct param_context);
 228 }
 229
 230
 231 int param_read(struct param_context *ctx, const char *fn)
 232 {
 233         ctx->sections = talloc_zero(ctx, struct param_section);
 234         if (ctx->sections == NULL)
 235                 return -1;
 236
 237         ctx->sections->name = talloc_strdup(ctx->sections, "global");
 238         if (!pm_process( fn, param_sfunc, param_pfunc, ctx)) {
 239                 return -1;
 240         }
 241
 242         return 0;
 243 }
 244
 245 int param_use(struct loadparm_context *lp_ctx, struct param_context *ctx)
 246 {
 247         struct param_section *section;
 248
 249         for (section = ctx->sections; section; section = section->next) {
 250                 struct param_opt *param;
 251                 bool isglobal = strcmp(section->name, "global") == 0;
 252                 for (param = section->parameters; param; param = param->next) {
 253                         if (isglobal)
 254                                 lp_do_global_parameter(lp_ctx, param->key,
 255                                                        param->value);
 256                         else {
 257                                 struct loadparm_service *service =
 258                                                         lp_service(lp_ctx, section->name);
 259                                 if (service == NULL)
 260                                         service = lp_add_service(lp_ctx, lp_default_service(lp_ctx), section->name);
 261                                 lp_do_service_parameter(lp_ctx, service, param->key, param->value);
 262                         }
 263                 }
 264         }
 265         return 0;
 266 }
 267
 268 int param_write(struct param_context *ctx, const char *fn)
 269 {
 270         int file;
 271         struct param_section *section;
 272
 273         if (fn == NULL || ctx == NULL)
 274                 return -1;
 275
 276         file = open(fn, O_WRONLY|O_CREAT, 0755);
 277
 278         if (file == -1)
 279                 return -1;
 280
 281         for (section = ctx->sections; section; section = section->next) {
 282                 struct param_opt *param;
 283
 284                 fdprintf(file, "[%s]\n", section->name);
 285                 for (param = section->parameters; param; param = param->next) {
 286                         fdprintf(file, "\t%s = %s\n", param->key, param->value);
 287                 }
 288                 fdprintf(file, "\n");
 289         }
 290
 291         close(file);
 292
 293         return 0;
 294 }