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 2 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, write to the Free Software
  17  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include "includes.h"
  21 #include "lib/util/dlinklist.h"
  22 #include "param/param.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 *param_section_get (struct param_section *section, const char *name)
  41 {
  42         struct param *p;
  43
  44         for (p = section->parameters; p; p = p->next) {
  45                 if (strcasecmp_m(p->name, name) == 0)
  46                         return p;
  47         }
  48
  49         return NULL;
  50 }
  51
  52 struct param *param_get (struct param_context *ctx, const char *section_name, const char *name)
  53 {
  54         struct param_section *section = param_get_section(ctx, section_name);
  55         if (section == NULL)
  56                 return NULL;
  57
  58         return param_section_get(section, name);
  59 }
  60
  61 /* Look up parameter. If it is not found, add it */
  62 static struct param *param_get_add(struct param_context *ctx, const char *section_name, const char *name)
  63 {
  64         struct param_section *section;
  65         struct param *p;
  66
  67         section = param_get_section(ctx, section_name);
  68
  69         if (section == NULL) {
  70                 section = talloc_zero(ctx, struct param_section);
  71                 if (section == NULL)
  72                         return NULL;
  73
  74                 section->name = talloc_strdup(section, section_name);
  75                 DLIST_ADD(ctx->sections, section);
  76         }
  77
  78         p = param_section_get(section, name);
  79         if (p == NULL) {
  80                 p = talloc_zero(section, struct param);
  81                 if (p == NULL)
  82                         return NULL;
  83
  84                 p->name = talloc_strdup(p, name);
  85                 DLIST_ADD(section->parameters, p);
  86         }
  87
  88         return p;
  89 }
  90
  91 const char *param_get_string(struct param_context *ctx, const char *section, const char *param)
  92 {
  93         struct param *p = param_get(ctx, section, param);
  94
  95         if (p == NULL)
  96                 return NULL;
  97
  98         return p->value;
  99 }
 100
 101 int param_set_string(struct param_context *ctx, const char *section, const char *param, const char *value)
 102 {
 103         struct param *p = param_get_add(ctx, section, param);
 104
 105         if (p == NULL)
 106                 return -1;
 107
 108         p->value = talloc_strdup(p, value);
 109
 110         return 0;
 111 }
 112
 113 const char **param_get_string_list(struct param_context *ctx, const char *section, const char *param,
 114                                  const char *separator)
 115 {
 116         struct param *p = param_get(ctx, section, param);
 117
 118         if (p == NULL)
 119                 return NULL;
 120
 121         if (separator == NULL)
 122                 separator = LIST_SEP;
 123
 124         if (p->list_value == NULL) {
 125                 p->list_value = str_list_make(ctx, p->value, separator);
 126         }
 127
 128         return p->list_value;
 129 }
 130
 131 int param_set_string_list(struct param_context *ctx, const char *section, const char *param, const char **list)
 132 {
 133         struct param *p = param_get_add(ctx, section, param);
 134
 135         p->value = str_list_join(p, list, ' ');
 136         p->list_value = str_list_copy(p, list);
 137
 138         return 0;
 139 }
 140
 141 int param_get_int(struct param_context *ctx, const char *section, const char *param, int default_v)
 142 {
 143         const char *value = param_get_string(ctx, section, param);
 144
 145         if (value)
 146                 return strtol(value, NULL, 0);
 147
 148         return default_v;
 149 }
 150
 151 void param_set_int(struct param_context *ctx, const char *section, const char *param, int value)
 152 {
 153         struct param *p = param_get_add(ctx, section, param);
 154
 155         if (!p)
 156                 return;
 157
 158         p->value = talloc_asprintf(p, "%d", value);
 159 }
 160
 161 unsigned long param_get_ulong(struct param_context *ctx, const char *section, const char *param, unsigned long default_v)
 162 {
 163         const char *value = param_get_string(ctx, section, param);
 164
 165         if (value)
 166                 return strtoul(value, NULL, 0);
 167
 168         return default_v;
 169 }
 170
 171 void param_set_ulong(struct param_context *ctx, const char *section, const char *name, unsigned long value)
 172 {
 173         struct param *p = param_get_add(ctx, section, name);
 174
 175         if (!p)
 176                 return;
 177
 178         p->value = talloc_asprintf(p, "%lu", value);
 179 }
 180
 181 static BOOL param_sfunc (const char *name, void *_ctx)
 182 {
 183         struct param_context *ctx = _ctx;
 184         struct param_section *section = param_get_section(ctx, name);
 185
 186         if (section == NULL) {
 187                 section = talloc_zero(ctx, struct param_section);
 188                 if (section == NULL)
 189                         return False;
 190
 191                 section->name = talloc_strdup(section, name);
 192
 193                 DLIST_ADD(ctx->sections, section);
 194         }
 195
 196         /* Make sure this section is on top of the list for param_pfunc */
 197         DLIST_PROMOTE(ctx->sections, section);
 198
 199         return True;
 200 }
 201
 202 static BOOL param_pfunc (const char *name, const char *value, void *_ctx)
 203 {
 204         struct param_context *ctx = _ctx;
 205         struct param *p = param_section_get(ctx->sections, name);
 206
 207         if (!p) {
 208                 p = talloc_zero(ctx->sections, struct param);
 209                 if (p == NULL)
 210                         return False;
 211
 212                 p->name = talloc_strdup(p, name);
 213                 p->value = talloc_strdup(p, value);
 214                 DLIST_ADD(ctx->sections->parameters, p);
 215         } else { /* Replace current value */
 216                 talloc_free(p->value);
 217                 p->value = talloc_strdup(p, value);
 218         }
 219
 220         return True;
 221 }
 222
 223 struct param_context *param_init(TALLOC_CTX *mem_ctx)
 224 {
 225         return talloc_zero(mem_ctx, struct param_context);
 226 }
 227
 228
 229 int param_read(struct param_context *ctx, const char *fn)
 230 {
 231         ctx->sections = talloc_zero(ctx, struct param_section);
 232         if (ctx->sections == NULL)
 233                 return -1;
 234
 235         ctx->sections->name = talloc_strdup(ctx->sections, "global");
 236         if (!pm_process( fn, param_sfunc, param_pfunc, ctx)) {
 237                 return -1;
 238         }
 239
 240         return 0;
 241 }
 242
 243 int param_write(struct param_context *ctx, const char *fn)
 244 {
 245         int file;
 246         struct param_section *section;
 247
 248         if (fn == NULL || ctx == NULL)
 249                 return -1;
 250
 251         file = open(fn, O_WRONLY|O_CREAT, 0755);
 252
 253         if (file == -1)
 254                 return -1;
 255
 256         for (section = ctx->sections; section; section = section->next) {
 257                 struct param *param;
 258
 259                 fdprintf(file, "[%s]\n", section->name);
 260                 for (param = section->parameters; param; param = param->next) {
 261                         fdprintf(file, "\t%s = %s\n", param->name, param->value);
 262                 }
 263                 fdprintf(file, "\n");
 264         }
 265
 266         close(file);
 267
 268         return 0;
 269 }