nis/nis_defaults.c

   1 /* Copyright (c) 1997, 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <sys/types.h>
  24 #include <rpc/rpc.h>
  25 #include <rpcsvc/nis.h>
  26
  27 #define DEFAULT_TTL 43200
  28
  29 /*
  30 ** Some functions for parsing the -D param and NIS_DEFAULTS Environ
  31 */
  32 static nis_name
  33 searchgroup (char *str)
  34 {
  35   char *cptr;
  36   int i;
  37
  38   cptr = strstr (str, "group=");
  39   if (cptr == NULL)
  40     return NULL;
  41
  42   cptr += 6;                    /* points to the begin of the group string */
  43   i = 0;
  44   while (cptr[i] != '\0' && cptr[i] != ':')
  45     i++;
  46   if (i == 0)                   /* only "group=" ? */
  47     return (nis_name) "";
  48
  49   return strndup (cptr, i);
  50 }
  51
  52 static nis_name
  53 searchowner (char *str)
  54 {
  55   char *cptr;
  56   int i;
  57
  58   cptr = strstr (str, "owner=");
  59   if (cptr == NULL)
  60     return NULL;
  61
  62   cptr += 6;                    /* points to the begin of the owner string */
  63   i = 0;
  64   while (cptr[i] != '\0' && cptr[i] != ':')
  65     i++;
  66   if (i == 0)                   /* only "owner=" ? */
  67     return strdup ("");
  68
  69   return strndup (cptr, i);
  70 }
  71
  72 static uint32_t
  73 searchttl (char *str)
  74 {
  75   char buf[strlen (str) + 1];
  76   char *cptr, *dptr;
  77   uint32_t time;
  78   int i;
  79
  80   dptr = strstr (str, "ttl=");
  81   if (dptr == NULL)             /* should (could) not happen */
  82     return DEFAULT_TTL;;
  83
  84   dptr += 4;                    /* points to the begin of the new ttl */
  85   i = 0;
  86   while (dptr[i] != '\0' && dptr[i] != ':')
  87     i++;
  88   if (i == 0)                   /* only "ttl=" ? */
  89     return DEFAULT_TTL;
  90
  91   strncpy (buf, dptr, i);
  92   buf[i] = '\0';
  93   time = 0;
  94
  95   dptr = buf;
  96   cptr = strchr (dptr, 'd');
  97   if (cptr != NULL)
  98     {
  99       *cptr = '\0';
 100       cptr++;
 101       time += atoi (dptr) * 60 * 60 * 24;
 102       dptr = cptr;
 103     }
 104
 105   cptr = strchr (dptr, 'h');
 106   if (cptr != NULL)
 107     {
 108       *cptr = '\0';
 109       cptr++;
 110       time += atoi (dptr) * 60 * 60;
 111       dptr = cptr;
 112     }
 113
 114   cptr = strchr (dptr, 'm');
 115   if (cptr != NULL)
 116     {
 117       *cptr = '\0';
 118       cptr++;
 119       time += atoi (dptr) * 60;
 120       dptr = cptr;
 121     }
 122
 123   cptr = strchr (dptr, 's');
 124   if (cptr != NULL)
 125     *cptr = '\0';
 126
 127   time += atoi (dptr);
 128
 129   return time;
 130 }
 131
 132 static unsigned int
 133 searchaccess (char *str, unsigned int access)
 134 {
 135   char buf[strlen (str) + 1];
 136   char *cptr;
 137   unsigned int result = access;
 138   int i;
 139   int n, o, g, w;
 140
 141   cptr = strstr (str, "access=");
 142   if (cptr == NULL)
 143     return 0;
 144
 145   cptr += 7;                    /* points to the begin of the access string */
 146   i = 0;
 147   while (cptr[i] != '\0' && cptr[i] != ':')
 148     i++;
 149   if (i == 0)                   /* only "access=" ? */
 150     return 0;
 151
 152   strncpy (buf, cptr, i);
 153   buf[i] = '\0';
 154
 155   n = o = g = w = 0;
 156   cptr = buf;
 157   if (*cptr == ',') /* Fix for stupid Solaris scripts */
 158     ++cptr;
 159   while (*cptr != '\0')
 160     {
 161       switch (*cptr)
 162         {
 163         case 'n':
 164           n = 1;
 165           break;
 166         case 'o':
 167           o = 1;
 168           break;
 169         case 'g':
 170           g = 1;
 171           break;
 172         case 'w':
 173           w = 1;
 174           break;
 175         case 'a':
 176           o = g = w = 1;
 177           break;
 178         case '-':
 179           cptr++;               /* Remove "-" from beginning */
 180           while (*cptr != '\0' && *cptr != ',')
 181             {
 182               switch (*cptr)
 183                 {
 184                 case 'r':
 185                   if (n)
 186                     result = result & ~(NIS_READ_ACC << 24);
 187                   if (o)
 188                     result = result & ~(NIS_READ_ACC << 16);
 189                   if (g)
 190                     result = result & ~(NIS_READ_ACC << 8);
 191                   if (w)
 192                     result = result & ~(NIS_READ_ACC);
 193                   break;
 194                 case 'm':
 195                   if (n)
 196                     result = result & ~(NIS_MODIFY_ACC << 24);
 197                   if (o)
 198                     result = result & ~(NIS_MODIFY_ACC << 16);
 199                   if (g)
 200                     result = result & ~(NIS_MODIFY_ACC << 8);
 201                   if (w)
 202                     result = result & ~(NIS_MODIFY_ACC);
 203                   break;
 204                 case 'c':
 205                   if (n)
 206                     result = result & ~(NIS_CREATE_ACC << 24);
 207                   if (o)
 208                     result = result & ~(NIS_CREATE_ACC << 16);
 209                   if (g)
 210                     result = result & ~(NIS_CREATE_ACC << 8);
 211                   if (w)
 212                     result = result & ~(NIS_CREATE_ACC);
 213                   break;
 214                 case 'd':
 215                   if (n)
 216                     result = result & ~(NIS_DESTROY_ACC << 24);
 217                   if (o)
 218                     result = result & ~(NIS_DESTROY_ACC << 16);
 219                   if (g)
 220                     result = result & ~(NIS_DESTROY_ACC << 8);
 221                   if (w)
 222                     result = result & ~(NIS_DESTROY_ACC);
 223                   break;
 224                 default:
 225                   return (~0U);
 226                 }
 227               cptr++;
 228             }
 229           n = o = g = w = 0;
 230           break;
 231         case '+':
 232           cptr++;               /* Remove "+" from beginning */
 233           while (*cptr != '\0' && *cptr != ',')
 234             {
 235               switch (*cptr)
 236                 {
 237                 case 'r':
 238                   if (n)
 239                     result = result | (NIS_READ_ACC << 24);
 240                   if (o)
 241                     result = result | (NIS_READ_ACC << 16);
 242                   if (g)
 243                     result = result | (NIS_READ_ACC << 8);
 244                   if (w)
 245                     result = result | (NIS_READ_ACC);
 246                   break;
 247                 case 'm':
 248                   if (n)
 249                     result = result | (NIS_MODIFY_ACC << 24);
 250                   if (o)
 251                     result = result | (NIS_MODIFY_ACC << 16);
 252                   if (g)
 253                     result = result | (NIS_MODIFY_ACC << 8);
 254                   if (w)
 255                     result = result | (NIS_MODIFY_ACC);
 256                   break;
 257                 case 'c':
 258                   if (n)
 259                     result = result | (NIS_CREATE_ACC << 24);
 260                   if (o)
 261                     result = result | (NIS_CREATE_ACC << 16);
 262                   if (g)
 263                     result = result | (NIS_CREATE_ACC << 8);
 264                   if (w)
 265                     result = result | (NIS_CREATE_ACC);
 266                   break;
 267                 case 'd':
 268                   if (n)
 269                     result = result | (NIS_DESTROY_ACC << 24);
 270                   if (o)
 271                     result = result | (NIS_DESTROY_ACC << 16);
 272                   if (g)
 273                     result = result | (NIS_DESTROY_ACC << 8);
 274                   if (w)
 275                     result = result | (NIS_DESTROY_ACC);
 276                   break;
 277                 default:
 278                   return (~0U);
 279                 }
 280               cptr++;
 281             }
 282           n = o = g = w = 0;
 283           break;
 284         case '=':
 285           cptr++;               /* Remove "=" from beginning */
 286           /* Clear */
 287           if (n)
 288             result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC +
 289                                  NIS_CREATE_ACC + NIS_DESTROY_ACC) << 24);
 290
 291           if (o)
 292             result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC +
 293                                  NIS_CREATE_ACC + NIS_DESTROY_ACC) << 16);
 294           if (g)
 295             result = result & ~((NIS_READ_ACC + NIS_MODIFY_ACC +
 296                                  NIS_CREATE_ACC + NIS_DESTROY_ACC) << 8);
 297           if (w)
 298             result = result & ~(NIS_READ_ACC + NIS_MODIFY_ACC +
 299                                 NIS_CREATE_ACC + NIS_DESTROY_ACC);
 300           while (*cptr != '\0' && *cptr != ',')
 301             {
 302               switch (*cptr)
 303                 {
 304                 case 'r':
 305                   if (n)
 306                     result = result | (NIS_READ_ACC << 24);
 307                   if (o)
 308                     result = result | (NIS_READ_ACC << 16);
 309                   if (g)
 310                     result = result | (NIS_READ_ACC << 8);
 311                   if (w)
 312                     result = result | (NIS_READ_ACC);
 313                   break;
 314                 case 'm':
 315                   if (n)
 316                     result = result | (NIS_MODIFY_ACC << 24);
 317                   if (o)
 318                     result = result | (NIS_MODIFY_ACC << 16);
 319                   if (g)
 320                     result = result | (NIS_MODIFY_ACC << 8);
 321                   if (w)
 322                     result = result | (NIS_MODIFY_ACC);
 323                   break;
 324                 case 'c':
 325                   if (n)
 326                     result = result | (NIS_CREATE_ACC << 24);
 327                   if (o)
 328                     result = result | (NIS_CREATE_ACC << 16);
 329                   if (g)
 330                     result = result | (NIS_CREATE_ACC << 8);
 331                   if (w)
 332                     result = result | (NIS_CREATE_ACC);
 333                   break;
 334                 case 'd':
 335                   if (n)
 336                     result = result | (NIS_DESTROY_ACC << 24);
 337                   if (o)
 338                     result = result | (NIS_DESTROY_ACC << 16);
 339                   if (g)
 340                     result = result | (NIS_DESTROY_ACC << 8);
 341                   if (w)
 342                     result = result | (NIS_DESTROY_ACC);
 343                   break;
 344                 default:
 345                   return result = (~0U);
 346                 }
 347               cptr++;
 348             }
 349           n = o = g = w = 0;
 350           break;
 351         default:
 352           return result = (~0U);
 353         }
 354       if (*cptr != '\0')
 355         cptr++;
 356     }
 357
 358   return result;
 359 }
 360
 361 nis_name
 362 __nis_default_owner (char *defaults)
 363 {
 364   char default_owner[NIS_MAXNAMELEN + 1];
 365   char *cptr, *dptr;
 366
 367   strcpy (default_owner, nis_local_principal ());
 368
 369   if (defaults != NULL)
 370     {
 371       dptr = strstr (defaults, "owner=");
 372       if (dptr != NULL)
 373         {
 374           char *p = searchowner (defaults);
 375           if (strlen (p) <= NIS_MAXNAMELEN)
 376             strcpy (default_owner, p);
 377           free (p);
 378         }
 379     }
 380   else
 381     {
 382       cptr = getenv ("NIS_DEFAULTS");
 383       if (cptr != NULL)
 384         {
 385           dptr = strstr (cptr, "owner=");
 386           if (dptr != NULL)
 387             {
 388               char *p = searchowner (cptr);
 389               if (strlen (p) <= NIS_MAXNAMELEN)
 390                 strcpy (default_owner, p);
 391               free (p);
 392             }
 393         }
 394     }
 395
 396   return strdup (default_owner);
 397 }
 398
 399 nis_name
 400 __nis_default_group (char *defaults)
 401 {
 402   char default_group[NIS_MAXNAMELEN + 1];
 403   char *cptr, *dptr;
 404
 405   strcpy (default_group, nis_local_group ());
 406
 407   if (defaults != NULL)
 408     {
 409       dptr = strstr (defaults, "group=");
 410       if (dptr != NULL)
 411         {
 412           char *p = searchgroup (defaults);
 413
 414           if (strlen (p) <= NIS_MAXNAMELEN)
 415             strcpy (default_group, p);
 416           free (p);
 417         }
 418     }
 419   else
 420     {
 421       cptr = getenv ("NIS_DEFAULTS");
 422       if (cptr != NULL)
 423         {
 424           dptr = strstr (cptr, "group=");
 425           if (dptr != NULL)
 426             {
 427               char *p = searchgroup (cptr);
 428
 429               if (strlen (p) <= NIS_MAXNAMELEN)
 430                 strcpy (default_group, p);
 431               free (p);
 432             }
 433         }
 434     }
 435
 436   return strdup (default_group);
 437 }
 438
 439 uint32_t
 440 __nis_default_ttl (char *defaults)
 441 {
 442   char *cptr, *dptr;
 443
 444   if (defaults != NULL)
 445     {
 446       dptr = strstr (defaults, "ttl=");
 447       if (dptr != NULL)
 448         return searchttl (defaults);
 449     }
 450
 451   cptr = getenv ("NIS_DEFAULTS");
 452   if (cptr == NULL)
 453     return DEFAULT_TTL;
 454
 455   dptr = strstr (cptr, "ttl=");
 456   if (dptr == NULL)
 457     return DEFAULT_TTL;
 458
 459   return searchttl (cptr);
 460 }
 461
 462 /* Default access rights are ----rmcdr---r---, but we could change
 463    this with the NIS_DEFAULTS variable. */
 464 unsigned int
 465 __nis_default_access (char *param, unsigned int defaults)
 466 {
 467   unsigned int result;
 468   char *cptr;
 469
 470   if (defaults == 0)
 471     result = 0 | OWNER_DEFAULT | GROUP_DEFAULT | WORLD_DEFAULT;
 472   else
 473     result = defaults;
 474
 475   if (param != NULL && strstr (param, "access=") != NULL)
 476     result = searchaccess (param, result);
 477   else
 478     {
 479       cptr = getenv ("NIS_DEFAULTS");
 480       if (cptr != NULL && strstr (cptr, "access=") != NULL)
 481         result = searchaccess (getenv ("NIS_DEFAULTS"), result);
 482     }
 483
 484   return result;
 485 }