2006-05-15 22:46:12 +02:00
|
|
|
/* Copyright (C) 1998-2000, 2002-2005, 2006 Free Software Foundation, Inc.
|
1998-01-31 09:39:55 +01:00
|
|
|
This file is part of the GNU C Library.
|
|
|
|
Contributed by Thorsten Kukuk <kukuk@uni-paderborn.de>, 1998.
|
|
|
|
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
2001-07-06 06:58:11 +02:00
|
|
|
modify it under the terms of the GNU Lesser General Public
|
|
|
|
License as published by the Free Software Foundation; either
|
|
|
|
version 2.1 of the License, or (at your option) any later version.
|
1998-01-31 09:39:55 +01:00
|
|
|
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
2001-07-06 06:58:11 +02:00
|
|
|
Lesser General Public License for more details.
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2001-07-06 06:58:11 +02:00
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
|
|
License along with the GNU C Library; if not, write to the Free
|
|
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
|
|
02111-1307 USA. */
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-09-30 10:08:40 +02:00
|
|
|
#include <alloca.h>
|
2004-09-08 17:46:42 +02:00
|
|
|
#include <assert.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <errno.h>
|
|
|
|
#include <grp.h>
|
1999-01-11 21:13:43 +01:00
|
|
|
#include <stdint.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <stdio.h>
|
|
|
|
#include <stdlib.h>
|
|
|
|
#include <string.h>
|
|
|
|
#include <unistd.h>
|
2004-09-08 17:46:42 +02:00
|
|
|
#include <sys/mman.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <sys/socket.h>
|
1998-07-24 23:32:39 +02:00
|
|
|
#include <sys/uio.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <sys/un.h>
|
2004-06-06 08:06:02 +02:00
|
|
|
#include <not-cancel.h>
|
2004-07-05 19:09:54 +02:00
|
|
|
#include <stdio-common/_itoa.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-19 02:40:00 +02:00
|
|
|
#include "nscd-client.h"
|
1998-01-31 09:39:55 +01:00
|
|
|
#include "nscd_proto.h"
|
|
|
|
|
1998-03-06 12:39:36 +01:00
|
|
|
int __nss_not_use_nscd_group;
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
static int nscd_getgr_r (const char *key, size_t keylen, request_type type,
|
|
|
|
struct group *resultbuf, char *buffer,
|
2004-02-27 01:55:39 +01:00
|
|
|
size_t buflen, struct group **result)
|
|
|
|
internal_function;
|
1998-10-18 17:16:22 +02:00
|
|
|
|
1998-01-31 09:39:55 +01:00
|
|
|
|
|
|
|
int
|
|
|
|
__nscd_getgrnam_r (const char *name, struct group *resultbuf, char *buffer,
|
2004-02-27 01:55:39 +01:00
|
|
|
size_t buflen, struct group **result)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
return nscd_getgr_r (name, strlen (name) + 1, GETGRBYNAME, resultbuf,
|
2004-02-27 01:55:39 +01:00
|
|
|
buffer, buflen, result);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
|
1998-01-31 09:39:55 +01:00
|
|
|
int
|
|
|
|
__nscd_getgrgid_r (gid_t gid, struct group *resultbuf, char *buffer,
|
2004-02-27 01:55:39 +01:00
|
|
|
size_t buflen, struct group **result)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2004-06-06 08:06:02 +02:00
|
|
|
char buf[3 * sizeof (gid_t)];
|
|
|
|
buf[sizeof (buf) - 1] = '\0';
|
|
|
|
char *cp = _itoa_word (gid, buf + sizeof (buf) - 1, 10, 0);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-06-06 08:06:02 +02:00
|
|
|
return nscd_getgr_r (cp, buf + sizeof (buf) - cp, GETGRBYGID, resultbuf,
|
|
|
|
buffer, buflen, result);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2006-05-15 22:46:12 +02:00
|
|
|
libc_locked_map_ptr (,__gr_map_handle) attribute_hidden;
|
2004-09-08 17:46:42 +02:00
|
|
|
/* Note that we only free the structure if necessary. The memory
|
|
|
|
mapping is not removed since it is not visible to the malloc
|
|
|
|
handling. */
|
|
|
|
libc_freeres_fn (gr_map_free)
|
|
|
|
{
|
2004-11-10 08:54:40 +01:00
|
|
|
if (__gr_map_handle.mapped != NO_MAPPING)
|
|
|
|
{
|
|
|
|
void *p = __gr_map_handle.mapped;
|
|
|
|
__gr_map_handle.mapped = NO_MAPPING;
|
|
|
|
free (p);
|
|
|
|
}
|
2004-09-08 17:46:42 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
|
1998-01-31 09:39:55 +01:00
|
|
|
static int
|
1999-02-02 17:27:57 +01:00
|
|
|
internal_function
|
1998-10-18 17:16:22 +02:00
|
|
|
nscd_getgr_r (const char *key, size_t keylen, request_type type,
|
2004-08-26 20:35:05 +02:00
|
|
|
struct group *resultbuf, char *buffer, size_t buflen,
|
2004-02-27 01:55:39 +01:00
|
|
|
struct group **result)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2004-09-08 17:46:42 +02:00
|
|
|
int gc_cycle;
|
2004-09-30 10:08:40 +02:00
|
|
|
const uint32_t *len = NULL;
|
|
|
|
size_t lensize = 0;
|
2004-09-08 17:46:42 +02:00
|
|
|
|
|
|
|
/* If the mapping is available, try to search there instead of
|
|
|
|
communicating with the nscd. */
|
|
|
|
struct mapped_database *mapped = __nscd_get_map_ref (GETFDGR, "group",
|
2004-11-10 08:54:40 +01:00
|
|
|
&__gr_map_handle,
|
|
|
|
&gc_cycle);
|
2004-09-30 10:08:40 +02:00
|
|
|
retry:;
|
2004-12-22 21:10:10 +01:00
|
|
|
const gr_response_header *gr_resp = NULL;
|
2004-09-30 10:08:40 +02:00
|
|
|
const char *gr_name = NULL;
|
|
|
|
size_t gr_name_len = 0;
|
|
|
|
int retval = -1;
|
|
|
|
const char *recend = (const char *) ~UINTMAX_C (0);
|
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
if (mapped != NO_MAPPING)
|
1998-03-06 12:39:36 +01:00
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
const struct datahead *found = __nscd_cache_search (type, key, keylen,
|
|
|
|
mapped);
|
2004-09-08 17:46:42 +02:00
|
|
|
if (found != NULL)
|
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
gr_resp = &found->data[0].grdata;
|
|
|
|
len = (const uint32_t *) (gr_resp + 1);
|
|
|
|
/* The alignment is always sufficient. */
|
|
|
|
assert (((uintptr_t) len & (__alignof__ (*len) - 1)) == 0);
|
2004-09-08 17:46:42 +02:00
|
|
|
gr_name = ((const char *) len
|
2004-12-22 21:10:10 +01:00
|
|
|
+ gr_resp->gr_mem_cnt * sizeof (uint32_t));
|
|
|
|
gr_name_len = gr_resp->gr_name_len + gr_resp->gr_passwd_len;
|
2004-09-08 17:46:42 +02:00
|
|
|
recend = (const char *) found->data + found->recsize;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
gr_response_header gr_resp_mem;
|
2004-09-08 17:46:42 +02:00
|
|
|
int sock = -1;
|
2004-12-22 21:10:10 +01:00
|
|
|
if (gr_resp == NULL)
|
2004-09-08 17:46:42 +02:00
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
sock = __nscd_open_socket (key, keylen, type, &gr_resp_mem,
|
|
|
|
sizeof (gr_resp_mem));
|
2004-09-08 17:46:42 +02:00
|
|
|
if (sock == -1)
|
|
|
|
{
|
|
|
|
__nss_not_use_nscd_group = 1;
|
|
|
|
goto out;
|
|
|
|
}
|
2004-12-22 21:10:10 +01:00
|
|
|
|
|
|
|
gr_resp = &gr_resp_mem;
|
1998-03-06 12:39:36 +01:00
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-03-01 23:35:28 +01:00
|
|
|
/* No value found so far. */
|
|
|
|
*result = NULL;
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
if (__builtin_expect (gr_resp->found == -1, 0))
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-03-06 12:39:36 +01:00
|
|
|
/* The daemon does not cache this database. */
|
|
|
|
__nss_not_use_nscd_group = 1;
|
2004-09-08 17:46:42 +02:00
|
|
|
goto out_close;
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
if (gr_resp->found == 1)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2004-06-06 08:06:02 +02:00
|
|
|
struct iovec vec[2];
|
1998-01-31 09:39:55 +01:00
|
|
|
char *p = buffer;
|
1998-07-24 23:32:39 +02:00
|
|
|
size_t total_len;
|
|
|
|
uintptr_t align;
|
2003-03-16 04:22:41 +01:00
|
|
|
nscd_ssize_t cnt;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Now allocate the buffer the array for the group members. We must
|
|
|
|
align the pointer. */
|
|
|
|
align = ((__alignof__ (char *) - (p - ((char *) 0)))
|
|
|
|
& (__alignof__ (char *) - 1));
|
2004-12-22 21:10:10 +01:00
|
|
|
total_len = (align + (1 + gr_resp->gr_mem_cnt) * sizeof (char *)
|
|
|
|
+ gr_resp->gr_name_len + gr_resp->gr_passwd_len);
|
2003-04-28 10:17:29 +02:00
|
|
|
if (__builtin_expect (buflen < total_len, 0))
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
no_room:
|
1998-01-31 09:39:55 +01:00
|
|
|
__set_errno (ERANGE);
|
2004-02-27 01:55:39 +01:00
|
|
|
retval = ERANGE;
|
2004-09-08 17:46:42 +02:00
|
|
|
goto out_close;
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
1999-09-06 01:34:47 +02:00
|
|
|
buflen -= total_len;
|
1998-07-24 23:32:39 +02:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
p += align;
|
2004-08-26 20:35:05 +02:00
|
|
|
resultbuf->gr_mem = (char **) p;
|
2004-12-22 21:10:10 +01:00
|
|
|
p += (1 + gr_resp->gr_mem_cnt) * sizeof (char *);
|
1998-07-24 23:32:39 +02:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Set pointers for strings. */
|
2004-08-26 20:35:05 +02:00
|
|
|
resultbuf->gr_name = p;
|
2004-12-22 21:10:10 +01:00
|
|
|
p += gr_resp->gr_name_len;
|
2004-08-26 20:35:05 +02:00
|
|
|
resultbuf->gr_passwd = p;
|
2004-12-22 21:10:10 +01:00
|
|
|
p += gr_resp->gr_passwd_len;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Fill in what we know now. */
|
2004-12-22 21:10:10 +01:00
|
|
|
resultbuf->gr_gid = gr_resp->gr_gid;
|
1998-07-24 23:32:39 +02:00
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
/* Read the length information, group name, and password. */
|
2004-09-30 10:08:40 +02:00
|
|
|
if (gr_name == NULL)
|
2004-09-08 17:46:42 +02:00
|
|
|
{
|
|
|
|
/* Allocate array to store lengths. */
|
2004-09-30 10:08:40 +02:00
|
|
|
if (lensize == 0)
|
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
lensize = gr_resp->gr_mem_cnt * sizeof (uint32_t);
|
2004-09-30 10:08:40 +02:00
|
|
|
len = (uint32_t *) alloca (lensize);
|
|
|
|
}
|
2004-12-22 21:10:10 +01:00
|
|
|
else if (gr_resp->gr_mem_cnt * sizeof (uint32_t) > lensize)
|
2004-09-30 10:08:40 +02:00
|
|
|
len = extend_alloca (len, lensize,
|
2004-12-22 21:10:10 +01:00
|
|
|
gr_resp->gr_mem_cnt * sizeof (uint32_t));
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
vec[0].iov_base = (void *) len;
|
2004-12-22 21:10:10 +01:00
|
|
|
vec[0].iov_len = gr_resp->gr_mem_cnt * sizeof (uint32_t);
|
2004-09-08 17:46:42 +02:00
|
|
|
vec[1].iov_base = resultbuf->gr_name;
|
2004-12-22 21:10:10 +01:00
|
|
|
vec[1].iov_len = gr_resp->gr_name_len + gr_resp->gr_passwd_len;
|
2004-09-08 17:46:42 +02:00
|
|
|
total_len = vec[0].iov_len + vec[1].iov_len;
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
/* Get this data. */
|
2005-02-22 23:58:32 +01:00
|
|
|
size_t n = __readvall (sock, vec, 2);
|
2004-09-08 17:46:42 +02:00
|
|
|
if (__builtin_expect (n != total_len, 0))
|
|
|
|
goto out_close;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
/* We already have the data. Just copy the group name and
|
|
|
|
password. */
|
2004-11-10 08:50:03 +01:00
|
|
|
memcpy (resultbuf->gr_name, gr_name,
|
2004-12-22 21:10:10 +01:00
|
|
|
gr_resp->gr_name_len + gr_resp->gr_passwd_len);
|
1998-07-24 23:32:39 +02:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Clear the terminating entry. */
|
2004-12-22 21:10:10 +01:00
|
|
|
resultbuf->gr_mem[gr_resp->gr_mem_cnt] = NULL;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Prepare reading the group members. */
|
|
|
|
total_len = 0;
|
2004-12-22 21:10:10 +01:00
|
|
|
for (cnt = 0; cnt < gr_resp->gr_mem_cnt; ++cnt)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2004-08-26 20:35:05 +02:00
|
|
|
resultbuf->gr_mem[cnt] = p;
|
1998-10-18 17:16:22 +02:00
|
|
|
total_len += len[cnt];
|
|
|
|
p += len[cnt];
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
if (__builtin_expect (gr_name + gr_name_len + total_len > recend, 0))
|
2004-12-22 21:10:10 +01:00
|
|
|
goto out_close;
|
2003-04-28 10:17:29 +02:00
|
|
|
if (__builtin_expect (total_len > buflen, 0))
|
2004-12-22 21:10:10 +01:00
|
|
|
goto no_room;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
retval = 0;
|
2004-09-08 17:46:42 +02:00
|
|
|
if (gr_name == NULL)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2005-02-22 23:58:32 +01:00
|
|
|
size_t n = __readall (sock, resultbuf->gr_mem[0], total_len);
|
2004-09-08 17:46:42 +02:00
|
|
|
if (__builtin_expect (n != total_len, 0))
|
|
|
|
{
|
|
|
|
/* The `errno' to some value != ERANGE. */
|
|
|
|
__set_errno (ENOENT);
|
|
|
|
retval = ENOENT;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
*result = resultbuf;
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
2004-02-27 01:55:39 +01:00
|
|
|
else
|
2004-09-08 17:46:42 +02:00
|
|
|
{
|
|
|
|
/* Copy the group member names. */
|
|
|
|
memcpy (resultbuf->gr_mem[0], gr_name + gr_name_len, total_len);
|
|
|
|
|
2004-11-10 08:50:03 +01:00
|
|
|
/* Try to detect corrupt databases. */
|
|
|
|
if (resultbuf->gr_name[gr_name_len - 1] != '\0'
|
2004-12-22 21:10:10 +01:00
|
|
|
|| resultbuf->gr_passwd[gr_resp->gr_passwd_len - 1] != '\0'
|
|
|
|
|| ({for (cnt = 0; cnt < gr_resp->gr_mem_cnt; ++cnt)
|
2004-11-10 08:50:03 +01:00
|
|
|
if (resultbuf->gr_mem[cnt][len[cnt] - 1] != '\0')
|
|
|
|
break;
|
2004-12-22 21:10:10 +01:00
|
|
|
cnt < gr_resp->gr_mem_cnt; }))
|
2004-11-10 08:50:03 +01:00
|
|
|
{
|
|
|
|
/* We cannot use the database. */
|
2004-12-22 21:10:10 +01:00
|
|
|
retval = -1;
|
2004-11-10 08:50:03 +01:00
|
|
|
goto out_close;
|
|
|
|
}
|
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
*result = resultbuf;
|
|
|
|
}
|
1998-02-24 16:22:29 +01:00
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
1999-03-14 22:12:49 +01:00
|
|
|
/* The `errno' to some value != ERANGE. */
|
|
|
|
__set_errno (ENOENT);
|
2004-02-27 01:55:39 +01:00
|
|
|
/* Even though we have not found anything, the result is zero. */
|
|
|
|
retval = 0;
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
2003-04-28 10:17:29 +02:00
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
out_close:
|
|
|
|
if (sock != -1)
|
|
|
|
close_not_cancel_no_status (sock);
|
2003-04-28 10:17:29 +02:00
|
|
|
out:
|
2004-12-22 21:10:10 +01:00
|
|
|
if (__nscd_drop_map_ref (mapped, &gc_cycle) != 0 && retval != -1)
|
2004-09-30 10:08:40 +02:00
|
|
|
{
|
|
|
|
/* When we come here this means there has been a GC cycle while we
|
|
|
|
were looking for the data. This means the data might have been
|
|
|
|
inconsistent. Retry if possible. */
|
2004-12-22 21:10:10 +01:00
|
|
|
if ((gc_cycle & 1) != 0)
|
2004-09-30 10:08:40 +02:00
|
|
|
{
|
|
|
|
/* nscd is just running gc now. Disable using the mapping. */
|
2004-12-22 21:10:10 +01:00
|
|
|
__nscd_unmap (mapped);
|
2004-09-30 10:08:40 +02:00
|
|
|
mapped = NO_MAPPING;
|
|
|
|
}
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
goto retry;
|
2004-09-30 10:08:40 +02:00
|
|
|
}
|
2003-04-28 10:17:29 +02:00
|
|
|
|
2004-02-27 01:55:39 +01:00
|
|
|
return retval;
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|