nis/nss_nisplus/nisplus-parser.c

   1 /* Copyright (C) 1997, 1999 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 <pwd.h>
  21 #include <ctype.h>
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <rpcsvc/nis.h>
  25
  26 #include "nisplus-parser.h"
  27
  28 #define NISENTRYVAL(idx,col,res) \
  29         ((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_val)
  30
  31 #define NISENTRYLEN(idx,col,res) \
  32         ((res)->objects.objects_val[(idx)].EN_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
  33
  34
  35 int
  36 _nss_nisplus_parse_pwent (nis_result *result, struct passwd *pw,
  37                           char *buffer, size_t buflen, int *errnop)
  38 {
  39   char *first_unused = buffer;
  40   size_t room_left = buflen;
  41   size_t len;
  42
  43   if (result == NULL)
  44     return 0;
  45
  46   if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
  47       || result->objects.objects_len != 1
  48       || __type_of (result->objects.objects_val) != NIS_ENTRY_OBJ
  49       || strcmp (result->objects.objects_val->EN_data.en_type,
  50                  "passwd_tbl") != 0
  51       || result->objects.objects_val->EN_data.en_cols.en_cols_len < 7)
  52     return 0;
  53
  54   if (NISENTRYLEN (0, 0, result) >= room_left)
  55     {
  56       /* The line is too long for our buffer.  */
  57     no_more_room:
  58       *errnop = ERANGE;
  59       return -1;
  60     }
  61
  62   strncpy (first_unused, NISENTRYVAL (0, 0, result),
  63            NISENTRYLEN (0, 0, result));
  64   first_unused[NISENTRYLEN (0, 0, result)] = '\0';
  65   len = strlen (first_unused);
  66   if (len == 0) /* No name ? Should never happen, database is corrupt */
  67     return 0;
  68   pw->pw_name = first_unused;
  69   room_left -= (len + 1);
  70   first_unused += (len + 1);
  71
  72   if (NISENTRYLEN (0, 1, result) >= room_left)
  73     goto no_more_room;
  74
  75   strncpy (first_unused, NISENTRYVAL (0, 1, result),
  76            NISENTRYLEN (0, 1, result));
  77   first_unused[NISENTRYLEN (0, 1, result)] = '\0';
  78   pw->pw_passwd = first_unused;
  79   len = strlen (first_unused);
  80   room_left -= (len + 1);
  81   first_unused += (len + 1);
  82
  83   if (NISENTRYLEN(0, 2, result) >= room_left)
  84     goto no_more_room;
  85
  86   strncpy (first_unused, NISENTRYVAL (0, 2, result),
  87            NISENTRYLEN (0, 2, result));
  88   first_unused[NISENTRYLEN (0, 2, result)] = '\0';
  89   len = strlen (first_unused);
  90   if (len == 0) /* If we don't have a uid, it's an invalid shadow entry */
  91     return 0;
  92   pw->pw_uid = atoi (first_unused);
  93   room_left -= (len + 1);
  94   first_unused += (len + 1);
  95
  96   if (NISENTRYLEN (0, 3, result) >= room_left)
  97     goto no_more_room;
  98
  99   strncpy (first_unused, NISENTRYVAL (0, 3, result),
 100            NISENTRYLEN (0, 3, result));
 101   first_unused[NISENTRYLEN (0, 3, result)] = '\0';
 102   len = strlen (first_unused);
 103   if (len == 0) /* If we don't have a gid, it's an invalid shadow entry */
 104     return 0;
 105   pw->pw_gid = atoi (first_unused);
 106   room_left -= (len + 1);
 107   first_unused += (len + 1);
 108
 109   if (NISENTRYLEN(0, 4, result) >= room_left)
 110     goto no_more_room;
 111
 112   strncpy (first_unused, NISENTRYVAL (0, 4, result),
 113            NISENTRYLEN (0, 4, result));
 114   first_unused[NISENTRYLEN (0, 4, result)] = '\0';
 115   pw->pw_gecos = first_unused;
 116   len = strlen (first_unused);
 117   room_left -= (len + 1);
 118   first_unused += (len + 1);
 119
 120   if (NISENTRYLEN (0, 5, result) >= room_left)
 121     goto no_more_room;
 122
 123   strncpy (first_unused, NISENTRYVAL (0, 5, result),
 124            NISENTRYLEN (0, 5, result));
 125   first_unused[NISENTRYLEN (0, 5, result)] = '\0';
 126   pw->pw_dir = first_unused;
 127   len = strlen (first_unused);
 128   room_left -= (len + 1);
 129   first_unused += (len + 1);
 130
 131   if (NISENTRYLEN (0, 6, result) >= room_left)
 132     goto no_more_room;
 133
 134   strncpy (first_unused, NISENTRYVAL (0, 6, result),
 135            NISENTRYLEN (0, 6, result));
 136   first_unused[NISENTRYLEN (0, 6, result)] = '\0';
 137   pw->pw_shell = first_unused;
 138   len = strlen (first_unused);
 139   room_left -= (len + 1);
 140   first_unused += (len + 1);
 141
 142   return 1;
 143 }
 144
 145 int
 146 _nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
 147                           char *buffer, size_t buflen, int *errnop)
 148 {
 149   char *first_unused = buffer;
 150   size_t room_left = buflen;
 151   char *line;
 152   int count;
 153   size_t len;
 154
 155   if (result == NULL)
 156     return 0;
 157
 158   if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
 159       || __type_of(result->objects.objects_val) != NIS_ENTRY_OBJ
 160       || strcmp (result->objects.objects_val[entry].EN_data.en_type,
 161                  "group_tbl") != 0
 162       || result->objects.objects_val[entry].EN_data.en_cols.en_cols_len < 4)
 163     return 0;
 164
 165   if (NISENTRYLEN (entry, 0, result) >= room_left)
 166     {
 167       /* The line is too long for our buffer.  */
 168     no_more_room:
 169       *errnop = ERANGE;
 170       return -1;
 171     }
 172
 173   strncpy (first_unused, NISENTRYVAL (entry, 0, result),
 174            NISENTRYLEN (entry, 0, result));
 175   first_unused[NISENTRYLEN (entry, 0, result)] = '\0';
 176   len = strlen (first_unused);
 177   if (len == 0) /* group table is corrupt */
 178     return 0;
 179   gr->gr_name = first_unused;
 180   room_left -= (len + 1);
 181   first_unused += (len + 1);
 182
 183   if (NISENTRYLEN (entry, 1, result) >= room_left)
 184     goto no_more_room;
 185
 186   strncpy (first_unused, NISENTRYVAL (entry, 1, result),
 187            NISENTRYLEN (entry, 1, result));
 188   first_unused[NISENTRYLEN (entry, 1, result)] = '\0';
 189   gr->gr_passwd = first_unused;
 190   len = strlen (first_unused);
 191   room_left -= (len + 1);
 192   first_unused += (len + 1);
 193
 194   if (NISENTRYLEN (entry, 2, result) >= room_left)
 195     goto no_more_room;
 196
 197   strncpy (first_unused, NISENTRYVAL (entry, 2, result),
 198            NISENTRYLEN (entry, 2, result));
 199   first_unused[NISENTRYLEN (entry, 2, result)] = '\0';
 200   len = strlen (first_unused);
 201   if (len == 0) /* We should always have an gid */
 202     return 0;
 203   gr->gr_gid = atoi (first_unused);
 204   room_left -= (strlen (first_unused) + 1);
 205   first_unused += strlen (first_unused) + 1;
 206
 207   if (NISENTRYLEN (entry, 3, result) >= room_left)
 208     goto no_more_room;
 209
 210   strncpy (first_unused, NISENTRYVAL (entry, 3, result),
 211            NISENTRYLEN (entry, 3, result));
 212   first_unused[NISENTRYLEN (entry, 3, result)] = '\0';
 213   line = first_unused;
 214   len = strlen (line);
 215   room_left -= (len + 1);
 216   first_unused += (len + 1);
 217   /* Adjust the pointer so it is aligned for
 218      storing pointers.  */
 219   first_unused += __alignof__ (char *) - 1;
 220   first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
 221   gr->gr_mem = (char **) first_unused;
 222
 223   count = 0;
 224   while (*line != '\0')
 225     {
 226       /* Skip leading blanks.  */
 227       while (isspace (*line))
 228         ++line;
 229
 230       if (*line == '\0')
 231         break;
 232
 233       if (room_left < sizeof (char *))
 234         goto no_more_room;
 235       room_left -= sizeof (char *);
 236       gr->gr_mem[count++] = line;
 237
 238       while (*line != '\0' && *line != ',' && !isspace (*line))
 239         ++line;
 240
 241       if (*line == ',' || isspace (*line))
 242         {
 243           int is = isspace (*line);
 244
 245           *line = '\0';
 246           if (is)
 247             while (*line != '\0' && (*line == ',' || isspace (*line)))
 248               ++line;
 249           else
 250             ++line;
 251         }
 252     }
 253   if (room_left < sizeof (char *))
 254     goto no_more_room;
 255   room_left -= sizeof (char *);
 256   gr->gr_mem[count] = NULL;
 257
 258   return 1;
 259 }
 260
 261 int
 262 _nss_nisplus_parse_spent (nis_result *result, struct spwd *sp,
 263                           char *buffer, size_t buflen, int *errnop)
 264 {
 265   char *first_unused = buffer;
 266   size_t room_left = buflen;
 267   size_t len;
 268
 269   if (result == NULL)
 270     return 0;
 271
 272   if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
 273       || result->objects.objects_len != 1
 274       || __type_of(result->objects.objects_val) != NIS_ENTRY_OBJ
 275       || strcmp (result->objects.objects_val->EN_data.en_type,
 276                  "passwd_tbl") != 0
 277       || result->objects.objects_val[0].EN_data.en_cols.en_cols_len < 8)
 278     return 0;
 279
 280   if (NISENTRYLEN (0, 0, result) >= room_left)
 281     {
 282       /* The line is too long for our buffer.  */
 283     no_more_room:
 284       *errnop = ERANGE;
 285       return -1;
 286     }
 287
 288   strncpy (first_unused, NISENTRYVAL (0, 0, result),
 289            NISENTRYLEN (0, 0, result));
 290   first_unused[NISENTRYLEN (0, 0, result)] = '\0';
 291   len = strlen (first_unused);
 292   if (len == 0)
 293     return 0;
 294   sp->sp_namp = first_unused;
 295   room_left -= (len + 1);
 296   first_unused += (len + 1);
 297
 298   if (NISENTRYLEN (0, 1, result) >= room_left)
 299     goto no_more_room;
 300
 301   strncpy (first_unused, NISENTRYVAL (0, 1, result),
 302            NISENTRYLEN (0, 1, result));
 303   first_unused[NISENTRYLEN (0, 1, result)] = '\0';
 304   sp->sp_pwdp = first_unused;
 305   len = strlen (first_unused);
 306   room_left -= (len + 1);
 307   first_unused += (len + 1);
 308
 309   sp->sp_lstchg = sp->sp_min = sp->sp_max = sp->sp_warn = sp->sp_inact =
 310     sp->sp_expire = -1;
 311   sp->sp_flag = ~0ul;
 312
 313   if (NISENTRYLEN (0, 7, result) > 0)
 314     {
 315       char *line, *cp;
 316
 317       line = NISENTRYVAL (0, 7, result);
 318       cp = strchr (line, ':');
 319       if (cp == NULL)
 320         return 1;
 321       *cp++ = '\0';
 322       if (*line)
 323         sp->sp_lstchg = atol (line);
 324
 325       line = cp;
 326       cp = strchr (line, ':');
 327       if (cp == NULL)
 328         return 1;
 329       *cp++ = '\0';
 330       if (*line)
 331         sp->sp_min = atol (line);
 332
 333       line = cp;
 334       cp = strchr (line, ':');
 335       if (cp == NULL)
 336         return 1;
 337       *cp++ = '\0';
 338       if (*line)
 339         sp->sp_max = atol (line);
 340
 341       line = cp;
 342       cp = strchr (line, ':');
 343       if (cp == NULL)
 344         return 1;
 345       *cp++ = '\0';
 346       if (*line)
 347         sp->sp_warn = atol (line);
 348
 349       line = cp;
 350       cp = strchr (line, ':');
 351       if (cp == NULL)
 352         return 1;
 353       *cp++ = '\0';
 354       if (*line)
 355         sp->sp_inact = atol (line);
 356
 357       line = cp;
 358       cp = strchr (line, ':');
 359       if (cp == NULL)
 360         return 1;
 361       *cp++ = '\0';
 362       if (*line)
 363         sp->sp_expire = atol (line);
 364
 365       line = cp;
 366       if (line == NULL)
 367         return 1;
 368       if (*line)
 369         sp->sp_flag = atol (line);
 370     }
 371
 372   return 1;
 373 }