374 lines
10 KiB
C
374 lines
10 KiB
C
/* Copyright (C) 1997, 1999, 2004, 2006 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@vt.uni-paderborn.de>, 1997.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <pwd.h>
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#include <ctype.h>
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#include <errno.h>
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#include <string.h>
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#include <rpcsvc/nis.h>
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#include "nisplus-parser.h"
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#define NISENTRYVAL(idx, col, res) \
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(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_val)
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#define NISENTRYLEN(idx, col, res) \
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(NIS_RES_OBJECT (res)[idx].EN_data.en_cols.en_cols_val[col].ec_value.ec_value_len)
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int
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_nss_nisplus_parse_pwent_chk (nis_result *result, struct passwd *pw,
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char *buffer, size_t buflen, int *errnop)
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{
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if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
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|| NIS_RES_NUMOBJ (result) != 1
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|| __type_of (NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
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|| strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, "passwd_tbl") != 0
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|| NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 7)
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return 0;
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return _nss_nisplus_parse_pwent (result, 0, pw, buffer, buflen, errnop);
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}
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int
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_nss_nisplus_parse_pwent (nis_result *result, size_t entry, struct passwd *pw,
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char *buffer, size_t buflen, int *errnop)
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{
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char *first_unused = buffer;
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size_t room_left = buflen;
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size_t len;
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if (NISENTRYLEN (entry, 0, result) >= room_left)
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{
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/* The line is too long for our buffer. */
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no_more_room:
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*errnop = ERANGE;
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return -1;
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}
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strncpy (first_unused, NISENTRYVAL (entry, 0, result),
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NISENTRYLEN (entry, 0, result));
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first_unused[NISENTRYLEN (entry, 0, result)] = '\0';
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len = strlen (first_unused);
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if (len == 0) /* No name ? Should never happen, database is corrupt */
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return 0;
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pw->pw_name = first_unused;
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room_left -= len + 1;
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first_unused += len + 1;
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if (NISENTRYLEN (entry, 1, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 1, result),
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NISENTRYLEN (entry, 1, result));
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first_unused[NISENTRYLEN (entry, 1, result)] = '\0';
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pw->pw_passwd = first_unused;
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len = strlen (first_unused);
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room_left -= len + 1;
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first_unused += len + 1;
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if (NISENTRYLEN (entry, 2, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 2, result),
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NISENTRYLEN (entry, 2, result));
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first_unused[NISENTRYLEN (entry, 2, result)] = '\0';
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len = strlen (first_unused);
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if (len == 0) /* If we don't have a uid, it's an invalid shadow entry */
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return 0;
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pw->pw_uid = strtoul (first_unused, NULL, 10);
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if (NISENTRYLEN (entry, 3, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 3, result),
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NISENTRYLEN (entry, 3, result));
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first_unused[NISENTRYLEN (entry, 3, result)] = '\0';
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len = strlen (first_unused);
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if (len == 0) /* If we don't have a gid, it's an invalid shadow entry */
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return 0;
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pw->pw_gid = strtoul (first_unused, NULL, 10);
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if (NISENTRYLEN(entry, 4, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 4, result),
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NISENTRYLEN (entry, 4, result));
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first_unused[NISENTRYLEN (entry, 4, result)] = '\0';
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pw->pw_gecos = first_unused;
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len = strlen (first_unused);
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room_left -= len + 1;
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first_unused += len + 1;
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if (NISENTRYLEN (entry, 5, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 5, result),
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NISENTRYLEN (entry, 5, result));
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first_unused[NISENTRYLEN (entry, 5, result)] = '\0';
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pw->pw_dir = first_unused;
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len = strlen (first_unused);
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room_left -= len + 1;
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first_unused += len + 1;
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if (NISENTRYLEN (entry, 6, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 6, result),
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NISENTRYLEN (entry, 6, result));
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first_unused[NISENTRYLEN (entry, 6, result)] = '\0';
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pw->pw_shell = first_unused;
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len = strlen (first_unused);
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room_left -= len + 1;
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first_unused += len + 1;
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return 1;
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}
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int
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_nss_nisplus_parse_grent (nis_result *result, u_long entry, struct group *gr,
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char *buffer, size_t buflen, int *errnop)
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{
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char *first_unused = buffer;
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size_t room_left = buflen;
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char *line;
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int count;
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size_t len;
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if (result == NULL)
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return 0;
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if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
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|| __type_of(NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
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|| strcmp (NIS_RES_OBJECT (result)[entry].EN_data.en_type,
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"group_tbl") != 0
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|| NIS_RES_OBJECT (result)[entry].EN_data.en_cols.en_cols_len < 4)
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return 0;
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if (NISENTRYLEN (entry, 0, result) >= room_left)
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{
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/* The line is too long for our buffer. */
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no_more_room:
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*errnop = ERANGE;
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return -1;
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}
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strncpy (first_unused, NISENTRYVAL (entry, 0, result),
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NISENTRYLEN (entry, 0, result));
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first_unused[NISENTRYLEN (entry, 0, result)] = '\0';
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len = strlen (first_unused);
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if (len == 0) /* group table is corrupt */
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return 0;
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gr->gr_name = first_unused;
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room_left -= (len + 1);
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first_unused += (len + 1);
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if (NISENTRYLEN (entry, 1, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 1, result),
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NISENTRYLEN (entry, 1, result));
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first_unused[NISENTRYLEN (entry, 1, result)] = '\0';
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gr->gr_passwd = first_unused;
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len = strlen (first_unused);
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room_left -= (len + 1);
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first_unused += (len + 1);
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if (NISENTRYLEN (entry, 2, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 2, result),
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NISENTRYLEN (entry, 2, result));
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first_unused[NISENTRYLEN (entry, 2, result)] = '\0';
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len = strlen (first_unused);
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if (len == 0) /* We should always have a gid */
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return 0;
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gr->gr_gid = strtoul (first_unused, NULL, 10);
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if (NISENTRYLEN (entry, 3, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (entry, 3, result),
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NISENTRYLEN (entry, 3, result));
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first_unused[NISENTRYLEN (entry, 3, result)] = '\0';
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line = first_unused;
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len = strlen (line);
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room_left -= (len + 1);
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first_unused += (len + 1);
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/* Adjust the pointer so it is aligned for
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storing pointers. */
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size_t adjust = ((__alignof__ (char *)
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- (first_unused - (char *) 0) % __alignof__ (char *))
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% __alignof__ (char *));
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if (room_left < adjust)
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goto no_more_room;
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first_unused += adjust;
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room_left -= adjust;
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gr->gr_mem = (char **) first_unused;
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count = 0;
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while (*line != '\0')
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{
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/* Skip leading blanks. */
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while (isspace (*line))
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++line;
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if (*line == '\0')
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break;
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if (room_left < sizeof (char *))
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goto no_more_room;
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room_left -= sizeof (char *);
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gr->gr_mem[count++] = line;
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while (*line != '\0' && *line != ',' && !isspace (*line))
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++line;
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if (*line == ',' || isspace (*line))
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{
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int is = isspace (*line);
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*line++ = '\0';
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if (is)
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while (*line != '\0' && (*line == ',' || isspace (*line)))
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++line;
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}
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}
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if (room_left < sizeof (char *))
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goto no_more_room;
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room_left -= sizeof (char *);
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gr->gr_mem[count] = NULL;
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return 1;
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}
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int
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_nss_nisplus_parse_spent (nis_result *result, struct spwd *sp,
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char *buffer, size_t buflen, int *errnop)
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{
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char *first_unused = buffer;
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size_t room_left = buflen;
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size_t len;
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if (result == NULL)
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return 0;
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if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS)
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|| NIS_RES_NUMOBJ (result) != 1
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|| __type_of(NIS_RES_OBJECT (result)) != NIS_ENTRY_OBJ
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|| strcmp (NIS_RES_OBJECT (result)->EN_data.en_type, "passwd_tbl") != 0
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|| NIS_RES_OBJECT (result)->EN_data.en_cols.en_cols_len < 8)
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return 0;
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if (NISENTRYLEN (0, 0, result) >= room_left)
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{
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/* The line is too long for our buffer. */
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no_more_room:
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*errnop = ERANGE;
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return -1;
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}
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strncpy (first_unused, NISENTRYVAL (0, 0, result),
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NISENTRYLEN (0, 0, result));
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first_unused[NISENTRYLEN (0, 0, result)] = '\0';
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len = strlen (first_unused);
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if (len == 0)
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return 0;
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sp->sp_namp = first_unused;
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room_left -= (len + 1);
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first_unused += (len + 1);
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if (NISENTRYLEN (0, 1, result) >= room_left)
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goto no_more_room;
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strncpy (first_unused, NISENTRYVAL (0, 1, result),
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NISENTRYLEN (0, 1, result));
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first_unused[NISENTRYLEN (0, 1, result)] = '\0';
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sp->sp_pwdp = first_unused;
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len = strlen (first_unused);
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room_left -= (len + 1);
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first_unused += (len + 1);
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sp->sp_lstchg = sp->sp_min = sp->sp_max = sp->sp_warn = sp->sp_inact =
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sp->sp_expire = -1;
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sp->sp_flag = ~0ul;
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if (NISENTRYLEN (0, 7, result) > 0)
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{
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char *line = NISENTRYVAL (0, 7, result);
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char *cp = strchr (line, ':');
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if (cp == NULL)
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return 1;
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*cp++ = '\0';
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if (*line)
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sp->sp_lstchg = atol (line);
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line = cp;
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cp = strchr (line, ':');
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if (cp == NULL)
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return 1;
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*cp++ = '\0';
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if (*line)
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sp->sp_min = atol (line);
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line = cp;
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cp = strchr (line, ':');
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if (cp == NULL)
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return 1;
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*cp++ = '\0';
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if (*line)
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sp->sp_max = atol (line);
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line = cp;
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cp = strchr (line, ':');
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if (cp == NULL)
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return 1;
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*cp++ = '\0';
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if (*line)
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sp->sp_warn = atol (line);
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line = cp;
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cp = strchr (line, ':');
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if (cp == NULL)
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return 1;
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*cp++ = '\0';
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if (*line)
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sp->sp_inact = atol (line);
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line = cp;
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cp = strchr (line, ':');
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if (cp == NULL)
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return 1;
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*cp++ = '\0';
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if (*line)
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sp->sp_expire = atol (line);
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line = cp;
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if (line == NULL)
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return 1;
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if (*line)
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sp->sp_flag = atol (line);
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}
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return 1;
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}
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