252 lines
6.3 KiB
C
252 lines
6.3 KiB
C
/* Copyright (C) 1997 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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <nss.h>
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#include <errno.h>
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#include <ctype.h>
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#include <string.h>
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#include <aliases.h>
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#include <libc-lock.h>
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#include <rpcsvc/nis.h>
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#include <rpcsvc/nislib.h>
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#include "nss-nisplus.h"
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__libc_lock_define_initialized (static, lock)
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static nis_result *result = NULL;
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static nis_name *names = NULL;
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#define NISENTRYVAL(idx,col,res) \
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((res)->objects.objects_val[(idx)].zo_data.objdata_u.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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((res)->objects.objects_val[(idx)].zo_data.objdata_u.en_data.en_cols.en_cols_val[(col)].ec_value.ec_value_len)
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static int
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_nss_nisplus_parse_aliasent (nis_result *result, struct aliasent *alias,
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char *buffer, size_t buflen)
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{
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if (result == NULL)
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return -1;
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if ((result->status != NIS_SUCCESS && result->status != NIS_S_SUCCESS) ||
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result->objects.objects_len != 1 ||
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result->objects.objects_val[0].zo_data.zo_type != ENTRY_OBJ ||
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strcmp(result->objects.objects_val[0].zo_data.objdata_u.en_data.en_type,
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"mail_aliases") != 0 ||
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result->objects.objects_val[0].zo_data.objdata_u.en_data.en_cols.en_cols_len < 2)
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return -1;
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else
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{
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char *first_unused = buffer + NISENTRYLEN(0, 1, result) + 1;
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size_t room_left =
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buflen - (buflen % __alignof__ (char *)) -
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NISENTRYLEN(0, 1, result) - 2;
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char *line;
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char *cp;
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if (NISENTRYLEN(0, 1, result) >= buflen)
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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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__set_errno (ERANGE);
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return -1;
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}
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else
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{
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strncpy (buffer, NISENTRYVAL(0, 1, result), NISENTRYLEN(0, 1, result));
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buffer[NISENTRYLEN(0, 1, result)] = '\0';
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}
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if (NISENTRYLEN(0, 0, result) >= room_left)
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goto no_more_room;
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alias->alias_local = 0;
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alias->alias_members_len = 0;
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*first_unused = '\0';
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++first_unused;
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strcpy (first_unused, NISENTRYVAL(0, 0, result));
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first_unused[NISENTRYLEN(0, 0, result)] = '\0';
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alias->alias_name = first_unused;
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/* Terminate the line for any case. */
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cp = strpbrk (alias->alias_name, "#\n");
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if (cp != NULL)
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*cp = '\0';
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first_unused += strlen (alias->alias_name) +1;
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/* Adjust the pointer so it is aligned for
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storing pointers. */
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first_unused += __alignof__ (char *) - 1;
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first_unused -= ((first_unused - (char *) 0) % __alignof__ (char *));
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alias->alias_members = (char **) first_unused;
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line = buffer;
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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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alias->alias_members[alias->alias_members_len] = line;
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while (*line != '\0' && *line != ',')
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line++;
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if (line != alias->alias_members[alias->alias_members_len])
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{
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*line = '\0';
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line++;
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alias->alias_members_len++;
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}
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}
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return alias->alias_members_len == 0 ? 0 : 1;
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}
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}
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enum nss_status
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_nss_nisplus_setaliasent (void)
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{
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__libc_lock_lock (lock);
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if (result)
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nis_freeresult (result);
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result = NULL;
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if (names)
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{
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nis_freenames (names);
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names = NULL;
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}
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nisplus_endaliasent (void)
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{
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__libc_lock_lock (lock);
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if (result)
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nis_freeresult (result);
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result = NULL;
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if (names)
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{
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nis_freenames (names);
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names = NULL;
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}
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__libc_lock_unlock (lock);
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return NSS_STATUS_SUCCESS;
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}
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static enum nss_status
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internal_nisplus_getaliasent_r (struct aliasent *alias,
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char *buffer, size_t buflen)
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{
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int parse_res;
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/* Get the next entry until we found a correct one. */
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do
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{
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if (result == NULL)
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{
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names = nis_getnames("mail_aliases.org_dir");
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if (names == NULL || names[0] == NULL)
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return NSS_STATUS_UNAVAIL;
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result = nis_first_entry(names[0]);
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if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
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return niserr2nss (result->status);
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}
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else
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{
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nis_result *res2;
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res2 = nis_next_entry(names[0], &result->cookie);
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nis_freeresult (result);
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result = res2;
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if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
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return niserr2nss (result->status);
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}
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parse_res = _nss_nisplus_parse_aliasent (result, alias, buffer, buflen);
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} while (!parse_res);
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return NSS_STATUS_SUCCESS;
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}
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enum nss_status
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_nss_nisplus_getaliasent_r (struct aliasent *result, char *buffer,
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size_t buflen)
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{
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int status;
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__libc_lock_lock (lock);
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status = internal_nisplus_getaliasent_r (result, buffer, buflen);
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__libc_lock_unlock (lock);
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return status;
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}
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enum nss_status
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_nss_nisplus_getaliasbyname_r (const char *name, struct aliasent *alias,
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char *buffer, size_t buflen)
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{
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int parse_res;
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if (name == NULL || strlen(name) > 8)
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return NSS_STATUS_NOTFOUND;
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else
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{
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nis_result *result;
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char buf[strlen (name) + 30];
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sprintf(buf, "[name=%s],mail_aliases.org_dir", name);
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result = nis_list(buf, EXPAND_NAME, NULL, NULL);
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if (niserr2nss (result->status) != NSS_STATUS_SUCCESS)
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return niserr2nss (result->status);
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parse_res = _nss_nisplus_parse_aliasent (result, alias, buffer, buflen);
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if (parse_res)
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return NSS_STATUS_SUCCESS;
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if (!parse_res && errno == ERANGE)
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return NSS_STATUS_TRYAGAIN;
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else
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return NSS_STATUS_NOTFOUND;
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}
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}
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