1998-10-18 17:16:22 +02:00
|
|
|
/* Inner loops of cache daemon.
|
2005-01-30 21:34:21 +01:00
|
|
|
Copyright (C) 1998-2003, 2004, 2005 Free Software Foundation, Inc.
|
1998-01-31 09:39:55 +01:00
|
|
|
This file is part of the GNU C Library.
|
1998-10-18 17:16:22 +02:00
|
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
|
|
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
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
1998-01-31 09:39:55 +01:00
|
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
2004-12-22 21:10:10 +01:00
|
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
|
|
Lesser General Public License for more details.
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
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
|
|
|
|
2004-10-03 21:33:48 +02:00
|
|
|
#include <alloca.h>
|
1998-10-18 17:16:22 +02:00
|
|
|
#include <assert.h>
|
2003-04-28 04:43:30 +02:00
|
|
|
#include <atomic.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <error.h>
|
1998-10-18 17:16:22 +02:00
|
|
|
#include <errno.h>
|
2004-08-25 19:24:52 +02:00
|
|
|
#include <fcntl.h>
|
2002-01-18 03:10:41 +01:00
|
|
|
#include <grp.h>
|
2004-08-26 20:35:05 +02:00
|
|
|
#include <libintl.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <pthread.h>
|
2002-01-18 03:10:41 +01:00
|
|
|
#include <pwd.h>
|
2004-06-28 06:42:05 +02:00
|
|
|
#include <resolv.h>
|
2002-01-18 03:10:41 +01:00
|
|
|
#include <stdio.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <stdlib.h>
|
|
|
|
#include <unistd.h>
|
1999-02-07 01:06:12 +01:00
|
|
|
#include <arpa/inet.h>
|
2004-10-03 09:33:54 +02:00
|
|
|
#ifdef HAVE_EPOLL
|
|
|
|
# include <sys/epoll.h>
|
|
|
|
#endif
|
2004-08-26 20:35:05 +02:00
|
|
|
#include <sys/mman.h>
|
1998-10-18 17:16:22 +02:00
|
|
|
#include <sys/param.h>
|
1998-06-22 19:08:51 +02:00
|
|
|
#include <sys/poll.h>
|
1998-01-31 09:39:55 +01:00
|
|
|
#include <sys/socket.h>
|
|
|
|
#include <sys/stat.h>
|
|
|
|
#include <sys/un.h>
|
|
|
|
|
|
|
|
#include "nscd.h"
|
|
|
|
#include "dbg_log.h"
|
2004-09-17 02:04:18 +02:00
|
|
|
#include "selinux.h"
|
2004-12-22 21:10:10 +01:00
|
|
|
|
|
|
|
|
2002-01-18 03:10:41 +01:00
|
|
|
/* Wrapper functions with error checking for standard functions. */
|
|
|
|
extern void *xmalloc (size_t n);
|
|
|
|
extern void *xcalloc (size_t n, size_t s);
|
|
|
|
extern void *xrealloc (void *o, size_t n);
|
|
|
|
|
|
|
|
/* Support to run nscd as an unprivileged user */
|
|
|
|
const char *server_user;
|
|
|
|
static uid_t server_uid;
|
|
|
|
static gid_t server_gid;
|
2003-05-04 09:00:44 +02:00
|
|
|
const char *stat_user;
|
|
|
|
uid_t stat_uid;
|
2002-01-18 03:10:41 +01:00
|
|
|
static gid_t *server_groups;
|
|
|
|
#ifndef NGROUPS
|
|
|
|
# define NGROUPS 32
|
|
|
|
#endif
|
2004-08-26 20:35:05 +02:00
|
|
|
static int server_ngroups;
|
2002-01-18 03:10:41 +01:00
|
|
|
|
2004-10-03 23:11:37 +02:00
|
|
|
static pthread_attr_t attr;
|
|
|
|
|
2002-01-18 03:10:41 +01:00
|
|
|
static void begin_drop_privileges (void);
|
|
|
|
static void finish_drop_privileges (void);
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Map request type to a string. */
|
|
|
|
const char *serv2str[LASTREQ] =
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
[GETPWBYNAME] = "GETPWBYNAME",
|
|
|
|
[GETPWBYUID] = "GETPWBYUID",
|
|
|
|
[GETGRBYNAME] = "GETGRBYNAME",
|
|
|
|
[GETGRBYGID] = "GETGRBYGID",
|
|
|
|
[GETHOSTBYNAME] = "GETHOSTBYNAME",
|
|
|
|
[GETHOSTBYNAMEv6] = "GETHOSTBYNAMEv6",
|
|
|
|
[GETHOSTBYADDR] = "GETHOSTBYADDR",
|
|
|
|
[GETHOSTBYADDRv6] = "GETHOSTBYADDRv6",
|
|
|
|
[SHUTDOWN] = "SHUTDOWN",
|
1999-09-27 02:22:04 +02:00
|
|
|
[GETSTAT] = "GETSTAT",
|
2004-09-08 17:46:42 +02:00
|
|
|
[INVALIDATE] = "INVALIDATE",
|
|
|
|
[GETFDPW] = "GETFDPW",
|
|
|
|
[GETFDGR] = "GETFDGR",
|
2004-09-15 10:25:49 +02:00
|
|
|
[GETFDHST] = "GETFDHST",
|
2004-09-30 04:24:51 +02:00
|
|
|
[GETAI] = "GETAI",
|
|
|
|
[INITGROUPS] = "INITGROUPS"
|
1998-10-18 17:16:22 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
/* The control data structures for the services. */
|
2004-08-26 20:35:05 +02:00
|
|
|
struct database_dyn dbs[lastdb] =
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
|
|
|
[pwddb] = {
|
2002-12-16 00:23:24 +01:00
|
|
|
.lock = PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP,
|
|
|
|
.enabled = 0,
|
|
|
|
.check_file = 1,
|
2004-08-26 20:35:05 +02:00
|
|
|
.persistent = 0,
|
2004-09-08 17:46:42 +02:00
|
|
|
.shared = 0,
|
2005-08-24 01:21:53 +02:00
|
|
|
.max_db_size = DEFAULT_MAX_DB_SIZE,
|
2002-12-16 00:23:24 +01:00
|
|
|
.filename = "/etc/passwd",
|
2004-08-26 20:35:05 +02:00
|
|
|
.db_filename = _PATH_NSCD_PASSWD_DB,
|
2002-12-16 00:23:24 +01:00
|
|
|
.disabled_iov = &pwd_iov_disabled,
|
|
|
|
.postimeout = 3600,
|
2004-08-26 20:35:05 +02:00
|
|
|
.negtimeout = 20,
|
|
|
|
.wr_fd = -1,
|
|
|
|
.ro_fd = -1,
|
|
|
|
.mmap_used = false
|
1998-10-18 17:16:22 +02:00
|
|
|
},
|
|
|
|
[grpdb] = {
|
2002-12-16 00:23:24 +01:00
|
|
|
.lock = PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP,
|
|
|
|
.enabled = 0,
|
|
|
|
.check_file = 1,
|
2004-08-26 20:35:05 +02:00
|
|
|
.persistent = 0,
|
2004-09-08 17:46:42 +02:00
|
|
|
.shared = 0,
|
2005-08-24 01:21:53 +02:00
|
|
|
.max_db_size = DEFAULT_MAX_DB_SIZE,
|
2002-12-16 00:23:24 +01:00
|
|
|
.filename = "/etc/group",
|
2004-08-26 20:35:05 +02:00
|
|
|
.db_filename = _PATH_NSCD_GROUP_DB,
|
2002-12-16 00:23:24 +01:00
|
|
|
.disabled_iov = &grp_iov_disabled,
|
|
|
|
.postimeout = 3600,
|
2004-08-26 20:35:05 +02:00
|
|
|
.negtimeout = 60,
|
|
|
|
.wr_fd = -1,
|
|
|
|
.ro_fd = -1,
|
|
|
|
.mmap_used = false
|
1998-10-18 17:16:22 +02:00
|
|
|
},
|
|
|
|
[hstdb] = {
|
2002-12-16 00:23:24 +01:00
|
|
|
.lock = PTHREAD_RWLOCK_WRITER_NONRECURSIVE_INITIALIZER_NP,
|
|
|
|
.enabled = 0,
|
|
|
|
.check_file = 1,
|
2004-08-26 20:35:05 +02:00
|
|
|
.persistent = 0,
|
2004-09-08 17:46:42 +02:00
|
|
|
.shared = 0,
|
2005-08-24 01:21:53 +02:00
|
|
|
.max_db_size = DEFAULT_MAX_DB_SIZE,
|
2002-12-16 00:23:24 +01:00
|
|
|
.filename = "/etc/hosts",
|
2004-08-26 20:35:05 +02:00
|
|
|
.db_filename = _PATH_NSCD_HOSTS_DB,
|
2002-12-16 00:23:24 +01:00
|
|
|
.disabled_iov = &hst_iov_disabled,
|
|
|
|
.postimeout = 3600,
|
2004-08-26 20:35:05 +02:00
|
|
|
.negtimeout = 20,
|
|
|
|
.wr_fd = -1,
|
|
|
|
.ro_fd = -1,
|
|
|
|
.mmap_used = false
|
1998-10-18 17:16:22 +02:00
|
|
|
}
|
|
|
|
};
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
|
|
|
|
/* Mapping of request type to database. */
|
2004-09-08 17:46:42 +02:00
|
|
|
static struct database_dyn *const serv2db[LASTREQ] =
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
|
|
|
[GETPWBYNAME] = &dbs[pwddb],
|
|
|
|
[GETPWBYUID] = &dbs[pwddb],
|
|
|
|
[GETGRBYNAME] = &dbs[grpdb],
|
|
|
|
[GETGRBYGID] = &dbs[grpdb],
|
|
|
|
[GETHOSTBYNAME] = &dbs[hstdb],
|
|
|
|
[GETHOSTBYNAMEv6] = &dbs[hstdb],
|
|
|
|
[GETHOSTBYADDR] = &dbs[hstdb],
|
2004-09-08 17:46:42 +02:00
|
|
|
[GETHOSTBYADDRv6] = &dbs[hstdb],
|
|
|
|
[GETFDPW] = &dbs[pwddb],
|
|
|
|
[GETFDGR] = &dbs[grpdb],
|
|
|
|
[GETFDHST] = &dbs[hstdb],
|
2004-09-15 10:25:49 +02:00
|
|
|
[GETAI] = &dbs[hstdb],
|
2004-09-30 04:24:51 +02:00
|
|
|
[INITGROUPS] = &dbs[grpdb]
|
2004-08-26 20:35:05 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
|
1998-10-19 11:28:26 +02:00
|
|
|
/* Number of seconds between two cache pruning runs. */
|
|
|
|
#define CACHE_PRUNE_INTERVAL 15
|
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
|
2004-10-03 23:11:37 +02:00
|
|
|
/* Initial number of threads to use. */
|
1998-10-18 17:16:22 +02:00
|
|
|
int nthreads = -1;
|
2004-10-03 23:11:37 +02:00
|
|
|
/* Maximum number of threads to use. */
|
|
|
|
int max_nthreads = 32;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Socket for incoming connections. */
|
|
|
|
static int sock;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2003-04-28 04:43:30 +02:00
|
|
|
/* Number of times clients had to wait. */
|
|
|
|
unsigned long int client_queued;
|
|
|
|
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2005-02-22 23:58:32 +01:00
|
|
|
ssize_t
|
|
|
|
writeall (int fd, const void *buf, size_t len)
|
|
|
|
{
|
|
|
|
size_t n = len;
|
|
|
|
ssize_t ret;
|
|
|
|
do
|
|
|
|
{
|
2005-08-24 01:21:53 +02:00
|
|
|
ret = TEMP_FAILURE_RETRY (send (fd, buf, n, MSG_NOSIGNAL));
|
2005-02-22 23:58:32 +01:00
|
|
|
if (ret <= 0)
|
|
|
|
break;
|
|
|
|
buf = (const char *) buf + ret;
|
|
|
|
n -= ret;
|
|
|
|
}
|
|
|
|
while (n > 0);
|
|
|
|
return ret < 0 ? ret : len - n;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
* posix/bits/unistd.h (confstr, getgroups, ttyname_r, gethostname,
getdomainname): Add __NTH.
* stdlib/bits/stdlib.h (ptsname_r, wctomb, mbstowcs, wcstombs):
Likewise.
(realpath): Likewise. Use __const instead of const. Add __restrict
keywords.
* socket/bits/socket2.h (recvfrom): Add __restrict keyword to __buf.
* wcsmbs/bits/wchar2.h (wmemcpy, wmemmove, wmempcpy, wmemset,
wcscpy, wcpcpy, wcsncpy, wcpncpy, wcscat, wcsncat, vswprintf, wcrtomb,
mbsrtowcs, wcsrtombs, mbsnrtowcs, wcsnrtombs): Add __NTH.
* string/bits/string3.h (__memset_ichk): Likewise.
(__memcpy_ichk, __memmove_ichk, __mempcpy_ichk, __strcpy_ichk,
__stpcpy_ichk, __strncpy_ichk, stpncpy, __strcat_ichk,
__strncat_ichk): Likewise. Use __const instead of const.
(__stpncpy_chk): Use __const instead of const.
(__stpncpy_alias): Use __REDIRECT_NTH instead of __REDIRECT.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* nscd/mem.c (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): Move
definitions to...
* nscd/nscd.h (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): ...here.
* nscd/connections.c (usekey): New enum.
(check_use, verify_persistent_db): New functions.
(nscd_init): If persistent database is corrupted, unlink it and
recreate rather than falling back to non-persistent database.
Call verify_persistent_db. Avoid overflows in total computation.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
* iconvdata/utf-16.c (PREPARE_LOOP): Minor cleanups to make code
better readable. Avoid passing var to loop function, it's not
necessary at all.
2005-08-08 21:04:11 +02:00
|
|
|
enum usekey
|
|
|
|
{
|
|
|
|
use_not = 0,
|
|
|
|
/* The following three are not really used, they are symbolic constants. */
|
|
|
|
use_first = 16,
|
|
|
|
use_begin = 32,
|
|
|
|
use_end = 64,
|
|
|
|
|
|
|
|
use_he = 1,
|
|
|
|
use_he_begin = use_he | use_begin,
|
|
|
|
use_he_end = use_he | use_end,
|
|
|
|
#if SEPARATE_KEY
|
|
|
|
use_key = 2,
|
|
|
|
use_key_begin = use_key | use_begin,
|
|
|
|
use_key_end = use_key | use_end,
|
|
|
|
use_key_first = use_key_begin | use_first,
|
|
|
|
#endif
|
|
|
|
use_data = 3,
|
|
|
|
use_data_begin = use_data | use_begin,
|
|
|
|
use_data_end = use_data | use_end,
|
|
|
|
use_data_first = use_data_begin | use_first
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
static int
|
|
|
|
check_use (const char *data, nscd_ssize_t first_free, uint8_t *usemap,
|
|
|
|
enum usekey use, ref_t start, size_t len)
|
|
|
|
{
|
|
|
|
assert (len >= 2);
|
|
|
|
|
|
|
|
if (start > first_free || start + len > first_free
|
|
|
|
|| (start & BLOCK_ALIGN_M1))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (usemap[start] == use_not)
|
|
|
|
{
|
|
|
|
/* Add the start marker. */
|
|
|
|
usemap[start] = use | use_begin;
|
|
|
|
use &= ~use_first;
|
|
|
|
|
|
|
|
while (--len > 0)
|
|
|
|
if (usemap[++start] != use_not)
|
|
|
|
return 0;
|
|
|
|
else
|
|
|
|
usemap[start] = use;
|
|
|
|
|
|
|
|
/* Add the end marker. */
|
|
|
|
usemap[start] = use | use_end;
|
|
|
|
}
|
|
|
|
else if ((usemap[start] & ~use_first) == ((use | use_begin) & ~use_first))
|
|
|
|
{
|
|
|
|
/* Hash entries can't be shared. */
|
|
|
|
if (use == use_he)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
usemap[start] |= (use & use_first);
|
|
|
|
use &= ~use_first;
|
|
|
|
|
|
|
|
while (--len > 1)
|
|
|
|
if (usemap[++start] != use)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
if (usemap[++start] != (use | use_end))
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
/* Points to a wrong object or somewhere in the middle. */
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Verify data in persistent database. */
|
|
|
|
static int
|
|
|
|
verify_persistent_db (void *mem, struct database_pers_head *readhead, int dbnr)
|
|
|
|
{
|
|
|
|
assert (dbnr == pwddb || dbnr == grpdb || dbnr == hstdb);
|
|
|
|
|
|
|
|
time_t now = time (NULL);
|
|
|
|
|
|
|
|
struct database_pers_head *head = mem;
|
|
|
|
struct database_pers_head head_copy = *head;
|
|
|
|
|
|
|
|
/* Check that the header that was read matches the head in the database. */
|
|
|
|
if (readhead != NULL && memcmp (head, readhead, sizeof (*head)) != 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
/* First some easy tests: make sure the database header is sane. */
|
|
|
|
if (head->version != DB_VERSION
|
|
|
|
|| head->header_size != sizeof (*head)
|
|
|
|
/* We allow a timestamp to be one hour ahead of the current time.
|
|
|
|
This should cover daylight saving time changes. */
|
|
|
|
|| head->timestamp > now + 60 * 60 + 60
|
|
|
|
|| (head->gc_cycle & 1)
|
|
|
|
|| (size_t) head->module > INT32_MAX / sizeof (ref_t)
|
|
|
|
|| (size_t) head->data_size > INT32_MAX - head->module * sizeof (ref_t)
|
|
|
|
|| head->first_free < 0
|
|
|
|
|| head->first_free > head->data_size
|
|
|
|
|| (head->first_free & BLOCK_ALIGN_M1) != 0
|
|
|
|
|| head->maxnentries < 0
|
|
|
|
|| head->maxnsearched < 0)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
uint8_t *usemap = calloc (head->first_free, 1);
|
|
|
|
if (usemap == NULL)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
const char *data = (char *) &head->array[roundup (head->module,
|
|
|
|
ALIGN / sizeof (ref_t))];
|
|
|
|
|
|
|
|
nscd_ssize_t he_cnt = 0;
|
|
|
|
for (nscd_ssize_t cnt = 0; cnt < head->module; ++cnt)
|
|
|
|
{
|
|
|
|
ref_t work = head->array[cnt];
|
|
|
|
|
|
|
|
while (work != ENDREF)
|
|
|
|
{
|
|
|
|
if (! check_use (data, head->first_free, usemap, use_he, work,
|
|
|
|
sizeof (struct hashentry)))
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
/* Now we know we can dereference the record. */
|
|
|
|
struct hashentry *here = (struct hashentry *) (data + work);
|
|
|
|
|
|
|
|
++he_cnt;
|
|
|
|
|
|
|
|
/* Make sure the record is for this type of service. */
|
|
|
|
if (here->type >= LASTREQ
|
|
|
|
|| serv2db[here->type] != &dbs[dbnr])
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
/* Validate boolean field value. */
|
|
|
|
if (here->first != false && here->first != true)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
if (here->len < 0)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
/* Now the data. */
|
|
|
|
if (here->packet < 0
|
|
|
|
|| here->packet > head->first_free
|
|
|
|
|| here->packet + sizeof (struct datahead) > head->first_free)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
struct datahead *dh = (struct datahead *) (data + here->packet);
|
|
|
|
|
|
|
|
if (! check_use (data, head->first_free, usemap,
|
|
|
|
use_data | (here->first ? use_first : 0),
|
|
|
|
here->packet, dh->allocsize))
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
if (dh->allocsize < sizeof (struct datahead)
|
|
|
|
|| dh->recsize > dh->allocsize
|
|
|
|
|| (dh->notfound != false && dh->notfound != true)
|
|
|
|
|| (dh->usable != false && dh->usable != true))
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
if (here->key < here->packet + sizeof (struct datahead)
|
|
|
|
|| here->key > here->packet + dh->allocsize
|
|
|
|
|| here->key + here->len > here->packet + dh->allocsize)
|
|
|
|
{
|
|
|
|
#if SEPARATE_KEY
|
|
|
|
/* If keys can appear outside of data, this should be done
|
|
|
|
instead. But gc doesn't mark the data in that case. */
|
|
|
|
if (! check_use (data, head->first_free, usemap,
|
|
|
|
use_key | (here->first ? use_first : 0),
|
|
|
|
here->key, here->len))
|
|
|
|
#endif
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
work = here->next;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (he_cnt != head->nentries)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
/* See if all data and keys had at least one reference from
|
|
|
|
he->first == true hashentry. */
|
|
|
|
for (ref_t idx = 0; idx < head->first_free; ++idx)
|
|
|
|
{
|
|
|
|
#if SEPARATE_KEY
|
|
|
|
if (usemap[idx] == use_key_begin)
|
|
|
|
goto fail;
|
|
|
|
#endif
|
|
|
|
if (usemap[idx] == use_data_begin)
|
|
|
|
goto fail;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Finally, make sure the database hasn't changed since the first test. */
|
|
|
|
if (memcmp (mem, &head_copy, sizeof (*head)) != 0)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
free (usemap);
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
free (usemap);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
/* Initialize database information structures. */
|
|
|
|
void
|
|
|
|
nscd_init (void)
|
2007-07-12 20:26:36 +02:00
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
/* Secure mode and unprivileged mode are incompatible */
|
|
|
|
if (server_user != NULL && secure_in_use)
|
2007-07-12 20:26:36 +02:00
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
dbg_log (_("Cannot run nscd in secure mode as unprivileged user"));
|
2005-06-20 17:49:08 +02:00
|
|
|
exit (4);
|
2002-01-18 03:10:41 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Look up unprivileged uid/gid/groups before we start listening on the
|
|
|
|
socket */
|
|
|
|
if (server_user != NULL)
|
|
|
|
begin_drop_privileges ();
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
if (nthreads == -1)
|
|
|
|
/* No configuration for this value, assume a default. */
|
|
|
|
nthreads = 2 * lastdb;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2005-02-22 23:58:32 +01:00
|
|
|
for (size_t cnt = 0; cnt < lastdb; ++cnt)
|
1998-10-18 17:16:22 +02:00
|
|
|
if (dbs[cnt].enabled)
|
1998-06-27 19:16:24 +02:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
pthread_rwlock_init (&dbs[cnt].lock, NULL);
|
2004-08-26 20:35:05 +02:00
|
|
|
pthread_mutex_init (&dbs[cnt].memlock, NULL);
|
1998-07-24 23:32:39 +02:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
if (dbs[cnt].persistent)
|
2003-01-16 08:54:50 +01:00
|
|
|
{
|
2004-08-26 20:35:05 +02:00
|
|
|
/* Try to open the appropriate file on disk. */
|
|
|
|
int fd = open (dbs[cnt].db_filename, O_RDWR);
|
|
|
|
if (fd != -1)
|
|
|
|
{
|
|
|
|
struct stat64 st;
|
|
|
|
void *mem;
|
|
|
|
size_t total;
|
|
|
|
struct database_pers_head head;
|
|
|
|
ssize_t n = TEMP_FAILURE_RETRY (read (fd, &head,
|
|
|
|
sizeof (head)));
|
|
|
|
if (n != sizeof (head) || fstat64 (fd, &st) != 0)
|
|
|
|
{
|
|
|
|
fail_db:
|
|
|
|
dbg_log (_("invalid persistent database file \"%s\": %s"),
|
|
|
|
dbs[cnt].db_filename, strerror (errno));
|
* posix/bits/unistd.h (confstr, getgroups, ttyname_r, gethostname,
getdomainname): Add __NTH.
* stdlib/bits/stdlib.h (ptsname_r, wctomb, mbstowcs, wcstombs):
Likewise.
(realpath): Likewise. Use __const instead of const. Add __restrict
keywords.
* socket/bits/socket2.h (recvfrom): Add __restrict keyword to __buf.
* wcsmbs/bits/wchar2.h (wmemcpy, wmemmove, wmempcpy, wmemset,
wcscpy, wcpcpy, wcsncpy, wcpncpy, wcscat, wcsncat, vswprintf, wcrtomb,
mbsrtowcs, wcsrtombs, mbsnrtowcs, wcsnrtombs): Add __NTH.
* string/bits/string3.h (__memset_ichk): Likewise.
(__memcpy_ichk, __memmove_ichk, __mempcpy_ichk, __strcpy_ichk,
__stpcpy_ichk, __strncpy_ichk, stpncpy, __strcat_ichk,
__strncat_ichk): Likewise. Use __const instead of const.
(__stpncpy_chk): Use __const instead of const.
(__stpncpy_alias): Use __REDIRECT_NTH instead of __REDIRECT.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* nscd/mem.c (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): Move
definitions to...
* nscd/nscd.h (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): ...here.
* nscd/connections.c (usekey): New enum.
(check_use, verify_persistent_db): New functions.
(nscd_init): If persistent database is corrupted, unlink it and
recreate rather than falling back to non-persistent database.
Call verify_persistent_db. Avoid overflows in total computation.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
* iconvdata/utf-16.c (PREPARE_LOOP): Minor cleanups to make code
better readable. Avoid passing var to loop function, it's not
necessary at all.
2005-08-08 21:04:11 +02:00
|
|
|
unlink (dbs[cnt].db_filename);
|
2004-08-26 20:35:05 +02:00
|
|
|
}
|
|
|
|
else if (head.module == 0 && head.data_size == 0)
|
|
|
|
{
|
|
|
|
/* The file has been created, but the head has not been
|
|
|
|
initialized yet. Remove the old file. */
|
|
|
|
unlink (dbs[cnt].db_filename);
|
|
|
|
}
|
|
|
|
else if (head.header_size != (int) sizeof (head))
|
|
|
|
{
|
|
|
|
dbg_log (_("invalid persistent database file \"%s\": %s"),
|
|
|
|
dbs[cnt].db_filename,
|
|
|
|
_("header size does not match"));
|
* posix/bits/unistd.h (confstr, getgroups, ttyname_r, gethostname,
getdomainname): Add __NTH.
* stdlib/bits/stdlib.h (ptsname_r, wctomb, mbstowcs, wcstombs):
Likewise.
(realpath): Likewise. Use __const instead of const. Add __restrict
keywords.
* socket/bits/socket2.h (recvfrom): Add __restrict keyword to __buf.
* wcsmbs/bits/wchar2.h (wmemcpy, wmemmove, wmempcpy, wmemset,
wcscpy, wcpcpy, wcsncpy, wcpncpy, wcscat, wcsncat, vswprintf, wcrtomb,
mbsrtowcs, wcsrtombs, mbsnrtowcs, wcsnrtombs): Add __NTH.
* string/bits/string3.h (__memset_ichk): Likewise.
(__memcpy_ichk, __memmove_ichk, __mempcpy_ichk, __strcpy_ichk,
__stpcpy_ichk, __strncpy_ichk, stpncpy, __strcat_ichk,
__strncat_ichk): Likewise. Use __const instead of const.
(__stpncpy_chk): Use __const instead of const.
(__stpncpy_alias): Use __REDIRECT_NTH instead of __REDIRECT.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* nscd/mem.c (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): Move
definitions to...
* nscd/nscd.h (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): ...here.
* nscd/connections.c (usekey): New enum.
(check_use, verify_persistent_db): New functions.
(nscd_init): If persistent database is corrupted, unlink it and
recreate rather than falling back to non-persistent database.
Call verify_persistent_db. Avoid overflows in total computation.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
* iconvdata/utf-16.c (PREPARE_LOOP): Minor cleanups to make code
better readable. Avoid passing var to loop function, it's not
necessary at all.
2005-08-08 21:04:11 +02:00
|
|
|
unlink (dbs[cnt].db_filename);
|
2004-08-26 20:35:05 +02:00
|
|
|
}
|
|
|
|
else if ((total = (sizeof (head)
|
2004-09-08 17:46:42 +02:00
|
|
|
+ roundup (head.module * sizeof (ref_t),
|
2004-08-26 20:35:05 +02:00
|
|
|
ALIGN)
|
|
|
|
+ head.data_size))
|
* posix/bits/unistd.h (confstr, getgroups, ttyname_r, gethostname,
getdomainname): Add __NTH.
* stdlib/bits/stdlib.h (ptsname_r, wctomb, mbstowcs, wcstombs):
Likewise.
(realpath): Likewise. Use __const instead of const. Add __restrict
keywords.
* socket/bits/socket2.h (recvfrom): Add __restrict keyword to __buf.
* wcsmbs/bits/wchar2.h (wmemcpy, wmemmove, wmempcpy, wmemset,
wcscpy, wcpcpy, wcsncpy, wcpncpy, wcscat, wcsncat, vswprintf, wcrtomb,
mbsrtowcs, wcsrtombs, mbsnrtowcs, wcsnrtombs): Add __NTH.
* string/bits/string3.h (__memset_ichk): Likewise.
(__memcpy_ichk, __memmove_ichk, __mempcpy_ichk, __strcpy_ichk,
__stpcpy_ichk, __strncpy_ichk, stpncpy, __strcat_ichk,
__strncat_ichk): Likewise. Use __const instead of const.
(__stpncpy_chk): Use __const instead of const.
(__stpncpy_alias): Use __REDIRECT_NTH instead of __REDIRECT.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* nscd/mem.c (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): Move
definitions to...
* nscd/nscd.h (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): ...here.
* nscd/connections.c (usekey): New enum.
(check_use, verify_persistent_db): New functions.
(nscd_init): If persistent database is corrupted, unlink it and
recreate rather than falling back to non-persistent database.
Call verify_persistent_db. Avoid overflows in total computation.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
* iconvdata/utf-16.c (PREPARE_LOOP): Minor cleanups to make code
better readable. Avoid passing var to loop function, it's not
necessary at all.
2005-08-08 21:04:11 +02:00
|
|
|
> st.st_size
|
|
|
|
|| total < sizeof (head))
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
|
|
|
dbg_log (_("invalid persistent database file \"%s\": %s"),
|
|
|
|
dbs[cnt].db_filename,
|
|
|
|
_("file size does not match"));
|
* posix/bits/unistd.h (confstr, getgroups, ttyname_r, gethostname,
getdomainname): Add __NTH.
* stdlib/bits/stdlib.h (ptsname_r, wctomb, mbstowcs, wcstombs):
Likewise.
(realpath): Likewise. Use __const instead of const. Add __restrict
keywords.
* socket/bits/socket2.h (recvfrom): Add __restrict keyword to __buf.
* wcsmbs/bits/wchar2.h (wmemcpy, wmemmove, wmempcpy, wmemset,
wcscpy, wcpcpy, wcsncpy, wcpncpy, wcscat, wcsncat, vswprintf, wcrtomb,
mbsrtowcs, wcsrtombs, mbsnrtowcs, wcsnrtombs): Add __NTH.
* string/bits/string3.h (__memset_ichk): Likewise.
(__memcpy_ichk, __memmove_ichk, __mempcpy_ichk, __strcpy_ichk,
__stpcpy_ichk, __strncpy_ichk, stpncpy, __strcat_ichk,
__strncat_ichk): Likewise. Use __const instead of const.
(__stpncpy_chk): Use __const instead of const.
(__stpncpy_alias): Use __REDIRECT_NTH instead of __REDIRECT.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* nscd/mem.c (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): Move
definitions to...
* nscd/nscd.h (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): ...here.
* nscd/connections.c (usekey): New enum.
(check_use, verify_persistent_db): New functions.
(nscd_init): If persistent database is corrupted, unlink it and
recreate rather than falling back to non-persistent database.
Call verify_persistent_db. Avoid overflows in total computation.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
* iconvdata/utf-16.c (PREPARE_LOOP): Minor cleanups to make code
better readable. Avoid passing var to loop function, it's not
necessary at all.
2005-08-08 21:04:11 +02:00
|
|
|
unlink (dbs[cnt].db_filename);
|
2004-08-26 20:35:05 +02:00
|
|
|
}
|
2005-08-24 01:21:53 +02:00
|
|
|
/* Note we map with the maximum size allowed for the
|
|
|
|
database. This is likely much larger than the
|
|
|
|
actual file size. This is OK on most OSes since
|
|
|
|
extensions of the underlying file will
|
|
|
|
automatically translate more pages available for
|
|
|
|
memory access. */
|
|
|
|
else if ((mem = mmap (NULL, dbs[cnt].max_db_size,
|
|
|
|
PROT_READ | PROT_WRITE,
|
|
|
|
MAP_SHARED, fd, 0))
|
|
|
|
== MAP_FAILED)
|
2004-08-26 20:35:05 +02:00
|
|
|
goto fail_db;
|
* posix/bits/unistd.h (confstr, getgroups, ttyname_r, gethostname,
getdomainname): Add __NTH.
* stdlib/bits/stdlib.h (ptsname_r, wctomb, mbstowcs, wcstombs):
Likewise.
(realpath): Likewise. Use __const instead of const. Add __restrict
keywords.
* socket/bits/socket2.h (recvfrom): Add __restrict keyword to __buf.
* wcsmbs/bits/wchar2.h (wmemcpy, wmemmove, wmempcpy, wmemset,
wcscpy, wcpcpy, wcsncpy, wcpncpy, wcscat, wcsncat, vswprintf, wcrtomb,
mbsrtowcs, wcsrtombs, mbsnrtowcs, wcsnrtombs): Add __NTH.
* string/bits/string3.h (__memset_ichk): Likewise.
(__memcpy_ichk, __memmove_ichk, __mempcpy_ichk, __strcpy_ichk,
__stpcpy_ichk, __strncpy_ichk, stpncpy, __strcat_ichk,
__strncat_ichk): Likewise. Use __const instead of const.
(__stpncpy_chk): Use __const instead of const.
(__stpncpy_alias): Use __REDIRECT_NTH instead of __REDIRECT.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
Jakub Jelinek <jakub@redhat.com>
* nscd/mem.c (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): Move
definitions to...
* nscd/nscd.h (BLOCK_ALIGN_LOG, BLOCK_ALIGN, BLOCK_ALIGN_M1): ...here.
* nscd/connections.c (usekey): New enum.
(check_use, verify_persistent_db): New functions.
(nscd_init): If persistent database is corrupted, unlink it and
recreate rather than falling back to non-persistent database.
Call verify_persistent_db. Avoid overflows in total computation.
2005-08-08 Ulrich Drepper <drepper@redhat.com>
* iconvdata/utf-16.c (PREPARE_LOOP): Minor cleanups to make code
better readable. Avoid passing var to loop function, it's not
necessary at all.
2005-08-08 21:04:11 +02:00
|
|
|
else if (!verify_persistent_db (mem, &head, cnt))
|
|
|
|
{
|
|
|
|
munmap (mem, total);
|
|
|
|
dbg_log (_("invalid persistent database file \"%s\": %s"),
|
|
|
|
dbs[cnt].db_filename,
|
|
|
|
_("verification failed"));
|
|
|
|
unlink (dbs[cnt].db_filename);
|
|
|
|
}
|
2004-08-26 20:35:05 +02:00
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Success. We have the database. */
|
|
|
|
dbs[cnt].head = mem;
|
|
|
|
dbs[cnt].memsize = total;
|
|
|
|
dbs[cnt].data = (char *)
|
|
|
|
&dbs[cnt].head->array[roundup (dbs[cnt].head->module,
|
|
|
|
ALIGN / sizeof (ref_t))];
|
|
|
|
dbs[cnt].mmap_used = true;
|
|
|
|
|
|
|
|
if (dbs[cnt].suggested_module > head.module)
|
|
|
|
dbg_log (_("suggested size of table for database %s larger than the persistent database's table"),
|
|
|
|
dbnames[cnt]);
|
|
|
|
|
|
|
|
dbs[cnt].wr_fd = fd;
|
|
|
|
fd = -1;
|
|
|
|
/* We also need a read-only descriptor. */
|
2004-09-10 22:31:41 +02:00
|
|
|
if (dbs[cnt].shared)
|
|
|
|
{
|
|
|
|
dbs[cnt].ro_fd = open (dbs[cnt].db_filename, O_RDONLY);
|
|
|
|
if (dbs[cnt].ro_fd == -1)
|
|
|
|
dbg_log (_("\
|
2004-08-26 20:35:05 +02:00
|
|
|
cannot create read-only descriptor for \"%s\"; no mmap"),
|
2004-09-10 22:31:41 +02:00
|
|
|
dbs[cnt].db_filename);
|
|
|
|
}
|
2004-08-26 20:35:05 +02:00
|
|
|
|
|
|
|
// XXX Shall we test whether the descriptors actually
|
|
|
|
// XXX point to the same file?
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Close the file descriptors in case something went
|
|
|
|
wrong in which case the variable have not been
|
|
|
|
assigned -1. */
|
|
|
|
if (fd != -1)
|
|
|
|
close (fd);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dbs[cnt].head == NULL)
|
|
|
|
{
|
|
|
|
/* No database loaded. Allocate the data structure,
|
|
|
|
possibly on disk. */
|
|
|
|
struct database_pers_head head;
|
|
|
|
size_t total = (sizeof (head)
|
|
|
|
+ roundup (dbs[cnt].suggested_module
|
|
|
|
* sizeof (ref_t), ALIGN)
|
|
|
|
+ (dbs[cnt].suggested_module
|
|
|
|
* DEFAULT_DATASIZE_PER_BUCKET));
|
|
|
|
|
|
|
|
/* Try to create the database. If we do not need a
|
|
|
|
persistent database create a temporary file. */
|
|
|
|
int fd;
|
|
|
|
int ro_fd = -1;
|
|
|
|
if (dbs[cnt].persistent)
|
|
|
|
{
|
|
|
|
fd = open (dbs[cnt].db_filename,
|
|
|
|
O_RDWR | O_CREAT | O_EXCL | O_TRUNC,
|
|
|
|
S_IRUSR | S_IWUSR);
|
2004-09-10 22:31:41 +02:00
|
|
|
if (fd != -1 && dbs[cnt].shared)
|
2004-08-26 20:35:05 +02:00
|
|
|
ro_fd = open (dbs[cnt].db_filename, O_RDONLY);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
2004-10-15 23:12:15 +02:00
|
|
|
char fname[] = _PATH_NSCD_XYZ_DB_TMP;
|
2004-08-26 20:35:05 +02:00
|
|
|
fd = mkstemp (fname);
|
|
|
|
|
|
|
|
/* We do not need the file name anymore after we
|
|
|
|
opened another file descriptor in read-only mode. */
|
2004-10-14 18:18:09 +02:00
|
|
|
if (fd != -1)
|
2004-08-26 20:35:05 +02:00
|
|
|
{
|
2004-10-14 18:18:09 +02:00
|
|
|
if (dbs[cnt].shared)
|
|
|
|
ro_fd = open (fname, O_RDONLY);
|
2004-08-26 20:35:05 +02:00
|
|
|
|
|
|
|
unlink (fname);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fd == -1)
|
|
|
|
{
|
|
|
|
if (errno == EEXIST)
|
|
|
|
{
|
|
|
|
dbg_log (_("database for %s corrupted or simultaneously used; remove %s manually if necessary and restart"),
|
|
|
|
dbnames[cnt], dbs[cnt].db_filename);
|
|
|
|
// XXX Correct way to terminate?
|
|
|
|
exit (1);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (dbs[cnt].persistent)
|
|
|
|
dbg_log (_("cannot create %s; no persistent database used"),
|
|
|
|
dbs[cnt].db_filename);
|
|
|
|
else
|
|
|
|
dbg_log (_("cannot create %s; no sharing possible"),
|
|
|
|
dbs[cnt].db_filename);
|
|
|
|
|
|
|
|
dbs[cnt].persistent = 0;
|
|
|
|
// XXX remember: no mmap
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Tell the user if we could not create the read-only
|
|
|
|
descriptor. */
|
2004-09-10 22:31:41 +02:00
|
|
|
if (ro_fd == -1 && dbs[cnt].shared)
|
2004-08-26 20:35:05 +02:00
|
|
|
dbg_log (_("\
|
|
|
|
cannot create read-only descriptor for \"%s\"; no mmap"),
|
|
|
|
dbs[cnt].db_filename);
|
|
|
|
|
|
|
|
/* Before we create the header, initialiye the hash
|
|
|
|
table. So that if we get interrupted if writing
|
|
|
|
the header we can recognize a partially initialized
|
|
|
|
database. */
|
|
|
|
size_t ps = sysconf (_SC_PAGESIZE);
|
|
|
|
char tmpbuf[ps];
|
|
|
|
assert (~ENDREF == 0);
|
|
|
|
memset (tmpbuf, '\xff', ps);
|
|
|
|
|
|
|
|
size_t remaining = dbs[cnt].suggested_module * sizeof (ref_t);
|
|
|
|
off_t offset = sizeof (head);
|
|
|
|
|
|
|
|
size_t towrite;
|
|
|
|
if (offset % ps != 0)
|
|
|
|
{
|
|
|
|
towrite = MIN (remaining, ps - (offset % ps));
|
2005-07-19 00:28:46 +02:00
|
|
|
if (pwrite (fd, tmpbuf, towrite, offset) != towrite)
|
|
|
|
goto write_fail;
|
2004-08-26 20:35:05 +02:00
|
|
|
offset += towrite;
|
|
|
|
remaining -= towrite;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (remaining > ps)
|
|
|
|
{
|
2005-07-19 00:28:46 +02:00
|
|
|
if (pwrite (fd, tmpbuf, ps, offset) == -1)
|
|
|
|
goto write_fail;
|
2004-08-26 20:35:05 +02:00
|
|
|
offset += ps;
|
|
|
|
remaining -= ps;
|
|
|
|
}
|
|
|
|
|
2005-07-19 00:28:46 +02:00
|
|
|
if (remaining > 0
|
|
|
|
&& pwrite (fd, tmpbuf, remaining, offset) != remaining)
|
|
|
|
goto write_fail;
|
2004-08-26 20:35:05 +02:00
|
|
|
|
|
|
|
/* Create the header of the file. */
|
|
|
|
struct database_pers_head head =
|
|
|
|
{
|
|
|
|
.version = DB_VERSION,
|
|
|
|
.header_size = sizeof (head),
|
|
|
|
.module = dbs[cnt].suggested_module,
|
|
|
|
.data_size = (dbs[cnt].suggested_module
|
|
|
|
* DEFAULT_DATASIZE_PER_BUCKET),
|
|
|
|
.first_free = 0
|
|
|
|
};
|
|
|
|
void *mem;
|
|
|
|
|
|
|
|
if ((TEMP_FAILURE_RETRY (write (fd, &head, sizeof (head)))
|
|
|
|
!= sizeof (head))
|
2005-08-24 01:21:53 +02:00
|
|
|
|| (TEMP_FAILURE_RETRY_VAL (posix_fallocate (fd, 0, total))
|
|
|
|
!= 0)
|
|
|
|
|| (mem = mmap (NULL, dbs[cnt].max_db_size,
|
|
|
|
PROT_READ | PROT_WRITE,
|
2004-08-26 20:35:05 +02:00
|
|
|
MAP_SHARED, fd, 0)) == MAP_FAILED)
|
|
|
|
{
|
2005-07-19 00:28:46 +02:00
|
|
|
write_fail:
|
2004-08-26 20:35:05 +02:00
|
|
|
unlink (dbs[cnt].db_filename);
|
|
|
|
dbg_log (_("cannot write to database file %s: %s"),
|
|
|
|
dbs[cnt].db_filename, strerror (errno));
|
|
|
|
dbs[cnt].persistent = 0;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Success. */
|
|
|
|
dbs[cnt].head = mem;
|
|
|
|
dbs[cnt].data = (char *)
|
|
|
|
&dbs[cnt].head->array[roundup (dbs[cnt].head->module,
|
|
|
|
ALIGN / sizeof (ref_t))];
|
|
|
|
dbs[cnt].memsize = total;
|
|
|
|
dbs[cnt].mmap_used = true;
|
|
|
|
|
|
|
|
/* Remember the descriptors. */
|
|
|
|
dbs[cnt].wr_fd = fd;
|
|
|
|
dbs[cnt].ro_fd = ro_fd;
|
|
|
|
fd = -1;
|
|
|
|
ro_fd = -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (fd != -1)
|
|
|
|
close (fd);
|
|
|
|
if (ro_fd != -1)
|
|
|
|
close (ro_fd);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2004-10-03 21:33:48 +02:00
|
|
|
if (paranoia
|
|
|
|
&& ((dbs[cnt].wr_fd != -1
|
|
|
|
&& fcntl (dbs[cnt].wr_fd, F_SETFD, FD_CLOEXEC) == -1)
|
|
|
|
|| (dbs[cnt].ro_fd != -1
|
|
|
|
&& fcntl (dbs[cnt].ro_fd, F_SETFD, FD_CLOEXEC) == -1)))
|
|
|
|
{
|
|
|
|
dbg_log (_("\
|
|
|
|
cannot set socket to close on exec: %s; disabling paranoia mode"),
|
|
|
|
strerror (errno));
|
|
|
|
paranoia = 0;
|
|
|
|
}
|
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
if (dbs[cnt].head == NULL)
|
|
|
|
{
|
|
|
|
/* We do not use the persistent database. Just
|
|
|
|
create an in-memory data structure. */
|
|
|
|
assert (! dbs[cnt].persistent);
|
|
|
|
|
|
|
|
dbs[cnt].head = xmalloc (sizeof (struct database_pers_head)
|
|
|
|
+ (dbs[cnt].suggested_module
|
|
|
|
* sizeof (ref_t)));
|
2004-12-22 21:10:10 +01:00
|
|
|
memset (dbs[cnt].head, '\0', sizeof (dbs[cnt].head));
|
2004-08-26 20:35:05 +02:00
|
|
|
assert (~ENDREF == 0);
|
|
|
|
memset (dbs[cnt].head->array, '\xff',
|
|
|
|
dbs[cnt].suggested_module * sizeof (ref_t));
|
|
|
|
dbs[cnt].head->module = dbs[cnt].suggested_module;
|
|
|
|
dbs[cnt].head->data_size = (DEFAULT_DATASIZE_PER_BUCKET
|
|
|
|
* dbs[cnt].head->module);
|
|
|
|
dbs[cnt].data = xmalloc (dbs[cnt].head->data_size);
|
|
|
|
dbs[cnt].head->first_free = 0;
|
2004-09-08 17:46:42 +02:00
|
|
|
|
|
|
|
dbs[cnt].shared = 0;
|
|
|
|
assert (dbs[cnt].ro_fd == -1);
|
2003-01-16 08:54:50 +01:00
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
if (dbs[cnt].check_file)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
/* We need the modification date of the file. */
|
2005-08-16 20:10:03 +02:00
|
|
|
struct stat64 st;
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2005-08-16 20:10:03 +02:00
|
|
|
if (stat64 (dbs[cnt].filename, &st) < 0)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
/* We cannot stat() the file, disable file checking. */
|
|
|
|
dbg_log (_("cannot stat() file `%s': %s"),
|
2003-01-16 08:54:50 +01:00
|
|
|
dbs[cnt].filename, strerror (errno));
|
1998-10-18 17:16:22 +02:00
|
|
|
dbs[cnt].check_file = 0;
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
else
|
1998-10-18 17:16:22 +02:00
|
|
|
dbs[cnt].file_mtime = st.st_mtime;
|
|
|
|
}
|
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
|
|
|
/* Create the socket. */
|
1998-10-18 17:16:22 +02:00
|
|
|
sock = socket (AF_UNIX, SOCK_STREAM, 0);
|
|
|
|
if (sock < 0)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
dbg_log (_("cannot open socket: %s"), strerror (errno));
|
2005-06-20 17:49:08 +02:00
|
|
|
exit (errno == EACCES ? 4 : 1);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
/* Bind a name to the socket. */
|
2005-02-22 23:58:32 +01:00
|
|
|
struct sockaddr_un sock_addr;
|
1998-01-31 09:39:55 +01:00
|
|
|
sock_addr.sun_family = AF_UNIX;
|
|
|
|
strcpy (sock_addr.sun_path, _PATH_NSCDSOCKET);
|
1998-10-18 17:16:22 +02:00
|
|
|
if (bind (sock, (struct sockaddr *) &sock_addr, sizeof (sock_addr)) < 0)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
|
|
|
dbg_log ("%s: %s", _PATH_NSCDSOCKET, strerror (errno));
|
2005-06-20 17:49:08 +02:00
|
|
|
exit (errno == EACCES ? 4 : 1);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2004-10-03 21:33:48 +02:00
|
|
|
/* We don't want to get stuck on accept. */
|
2004-08-25 19:24:52 +02:00
|
|
|
int fl = fcntl (sock, F_GETFL);
|
2004-10-03 21:33:48 +02:00
|
|
|
if (fl == -1 || fcntl (sock, F_SETFL, fl | O_NONBLOCK) == -1)
|
|
|
|
{
|
|
|
|
dbg_log (_("cannot change socket to nonblocking mode: %s"),
|
|
|
|
strerror (errno));
|
|
|
|
exit (1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The descriptor needs to be closed on exec. */
|
|
|
|
if (paranoia && fcntl (sock, F_SETFD, FD_CLOEXEC) == -1)
|
|
|
|
{
|
|
|
|
dbg_log (_("cannot set socket to close on exec: %s"),
|
|
|
|
strerror (errno));
|
|
|
|
exit (1);
|
|
|
|
}
|
2004-08-25 19:24:52 +02:00
|
|
|
|
1998-01-31 09:39:55 +01:00
|
|
|
/* Set permissions for the socket. */
|
2004-08-26 20:35:05 +02:00
|
|
|
chmod (_PATH_NSCDSOCKET, DEFFILEMODE);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
|
|
|
/* Set the socket up to accept connections. */
|
1998-10-18 17:16:22 +02:00
|
|
|
if (listen (sock, SOMAXCONN) < 0)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
dbg_log (_("cannot enable socket to accept connections: %s"),
|
|
|
|
strerror (errno));
|
1998-01-31 09:39:55 +01:00
|
|
|
exit (1);
|
|
|
|
}
|
2002-01-18 03:10:41 +01:00
|
|
|
|
|
|
|
/* Change to unprivileged uid/gid/groups if specifed in config file */
|
|
|
|
if (server_user != NULL)
|
|
|
|
finish_drop_privileges ();
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
|
|
|
|
/* Close the connections. */
|
1998-01-31 09:39:55 +01:00
|
|
|
void
|
1998-10-18 17:16:22 +02:00
|
|
|
close_sockets (void)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
close (sock);
|
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2003-05-04 09:00:44 +02:00
|
|
|
|
1999-09-27 02:22:04 +02:00
|
|
|
static void
|
2004-12-22 21:10:10 +01:00
|
|
|
invalidate_cache (char *key)
|
1999-09-27 02:22:04 +02:00
|
|
|
{
|
|
|
|
dbtype number;
|
|
|
|
|
|
|
|
if (strcmp (key, "passwd") == 0)
|
|
|
|
number = pwddb;
|
|
|
|
else if (strcmp (key, "group") == 0)
|
|
|
|
number = grpdb;
|
2001-07-17 04:38:34 +02:00
|
|
|
else if (__builtin_expect (strcmp (key, "hosts"), 0) == 0)
|
2004-06-28 06:42:05 +02:00
|
|
|
{
|
|
|
|
number = hstdb;
|
|
|
|
|
|
|
|
/* Re-initialize the resolver. resolv.conf might have changed. */
|
|
|
|
res_init ();
|
|
|
|
}
|
2001-07-17 04:38:34 +02:00
|
|
|
else
|
2004-12-22 21:10:10 +01:00
|
|
|
return;
|
1999-09-27 02:22:04 +02:00
|
|
|
|
2000-10-23 19:11:35 +02:00
|
|
|
if (dbs[number].enabled)
|
2004-12-22 21:10:10 +01:00
|
|
|
prune_cache (&dbs[number], LONG_MAX);
|
1999-09-27 02:22:04 +02:00
|
|
|
}
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
#ifdef SCM_RIGHTS
|
|
|
|
static void
|
|
|
|
send_ro_fd (struct database_dyn *db, char *key, int fd)
|
|
|
|
{
|
|
|
|
/* If we do not have an read-only file descriptor do nothing. */
|
|
|
|
if (db->ro_fd == -1)
|
|
|
|
return;
|
|
|
|
|
|
|
|
/* We need to send some data along with the descriptor. */
|
|
|
|
struct iovec iov[1];
|
|
|
|
iov[0].iov_base = key;
|
|
|
|
iov[0].iov_len = strlen (key) + 1;
|
|
|
|
|
|
|
|
/* Prepare the control message to transfer the descriptor. */
|
2005-07-14 04:17:58 +02:00
|
|
|
union
|
|
|
|
{
|
|
|
|
struct cmsghdr hdr;
|
|
|
|
char bytes[CMSG_SPACE (sizeof (int))];
|
|
|
|
} buf;
|
2004-09-08 17:46:42 +02:00
|
|
|
struct msghdr msg = { .msg_iov = iov, .msg_iovlen = 1,
|
2005-07-14 04:17:58 +02:00
|
|
|
.msg_control = buf.bytes,
|
|
|
|
.msg_controllen = sizeof (buf) };
|
2004-09-08 17:46:42 +02:00
|
|
|
struct cmsghdr *cmsg = CMSG_FIRSTHDR (&msg);
|
|
|
|
|
|
|
|
cmsg->cmsg_level = SOL_SOCKET;
|
|
|
|
cmsg->cmsg_type = SCM_RIGHTS;
|
|
|
|
cmsg->cmsg_len = CMSG_LEN (sizeof (int));
|
|
|
|
|
|
|
|
*(int *) CMSG_DATA (cmsg) = db->ro_fd;
|
|
|
|
|
|
|
|
msg.msg_controllen = cmsg->cmsg_len;
|
|
|
|
|
|
|
|
/* Send the control message. We repeat when we are interrupted but
|
|
|
|
everything else is ignored. */
|
2005-01-30 21:34:21 +01:00
|
|
|
#ifndef MSG_NOSIGNAL
|
|
|
|
# define MSG_NOSIGNAL 0
|
|
|
|
#endif
|
|
|
|
(void) TEMP_FAILURE_RETRY (sendmsg (fd, &msg, MSG_NOSIGNAL));
|
2004-09-08 17:46:42 +02:00
|
|
|
|
|
|
|
if (__builtin_expect (debug_level > 0, 0))
|
|
|
|
dbg_log (_("provide access to FD %d, for %s"), db->ro_fd, key);
|
|
|
|
}
|
|
|
|
#endif /* SCM_RIGHTS */
|
|
|
|
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Handle new request. */
|
|
|
|
static void
|
1999-06-11 22:58:21 +02:00
|
|
|
handle_request (int fd, request_header *req, void *key, uid_t uid)
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
2001-07-17 04:38:34 +02:00
|
|
|
if (__builtin_expect (req->version, NSCD_VERSION) != NSCD_VERSION)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2001-07-17 03:37:42 +02:00
|
|
|
if (debug_level > 0)
|
|
|
|
dbg_log (_("\
|
1998-10-18 17:16:22 +02:00
|
|
|
cannot handle old request version %d; current version is %d"),
|
2001-07-17 03:37:42 +02:00
|
|
|
req->version, NSCD_VERSION);
|
1998-01-31 09:39:55 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2004-09-17 02:04:18 +02:00
|
|
|
/* Make the SELinux check before we go on to the standard checks. We
|
|
|
|
need to verify that the request type is valid, since it has not
|
|
|
|
yet been checked at this point. */
|
|
|
|
if (selinux_enabled
|
|
|
|
&& __builtin_expect (req->type, GETPWBYNAME) >= GETPWBYNAME
|
|
|
|
&& __builtin_expect (req->type, LASTREQ) < LASTREQ
|
|
|
|
&& nscd_request_avc_has_perm (fd, req->type) != 0)
|
|
|
|
return;
|
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
struct database_dyn *db = serv2db[req->type];
|
|
|
|
|
2004-09-30 04:24:51 +02:00
|
|
|
// XXX Clean up so that each new command need not introduce a
|
|
|
|
// XXX new conditional.
|
2004-09-15 10:25:49 +02:00
|
|
|
if ((__builtin_expect (req->type, GETPWBYNAME) >= GETPWBYNAME
|
|
|
|
&& __builtin_expect (req->type, LASTDBREQ) <= LASTDBREQ)
|
2004-09-30 04:24:51 +02:00
|
|
|
|| req->type == GETAI || req->type == INITGROUPS)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2001-07-17 04:38:34 +02:00
|
|
|
if (__builtin_expect (debug_level, 0) > 0)
|
1999-02-07 01:06:12 +01:00
|
|
|
{
|
|
|
|
if (req->type == GETHOSTBYADDR || req->type == GETHOSTBYADDRv6)
|
|
|
|
{
|
|
|
|
char buf[INET6_ADDRSTRLEN];
|
|
|
|
|
|
|
|
dbg_log ("\t%s (%s)", serv2str[req->type],
|
|
|
|
inet_ntop (req->type == GETHOSTBYADDR
|
|
|
|
? AF_INET : AF_INET6,
|
|
|
|
key, buf, sizeof (buf)));
|
|
|
|
}
|
|
|
|
else
|
2004-08-26 20:35:05 +02:00
|
|
|
dbg_log ("\t%s (%s)", serv2str[req->type], (char *) key);
|
1999-02-07 01:06:12 +01:00
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Is this service enabled? */
|
|
|
|
if (!db->enabled)
|
|
|
|
{
|
1998-10-19 17:22:14 +02:00
|
|
|
/* No, sent the prepared record. */
|
2005-08-24 01:21:53 +02:00
|
|
|
if (TEMP_FAILURE_RETRY (send (fd, db->disabled_iov->iov_base,
|
|
|
|
db->disabled_iov->iov_len,
|
|
|
|
MSG_NOSIGNAL))
|
2003-04-22 21:52:59 +02:00
|
|
|
!= (ssize_t) db->disabled_iov->iov_len
|
2001-07-17 04:38:34 +02:00
|
|
|
&& __builtin_expect (debug_level, 0) > 0)
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
|
|
|
/* We have problems sending the result. */
|
|
|
|
char buf[256];
|
|
|
|
dbg_log (_("cannot write result: %s"),
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
return;
|
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Be sure we can read the data. */
|
2003-04-26 06:15:50 +02:00
|
|
|
if (__builtin_expect (pthread_rwlock_tryrdlock (&db->lock) != 0, 0))
|
|
|
|
{
|
2004-08-26 20:35:05 +02:00
|
|
|
++db->head->rdlockdelayed;
|
2003-04-26 06:15:50 +02:00
|
|
|
pthread_rwlock_rdlock (&db->lock);
|
|
|
|
}
|
1998-10-18 17:16:22 +02:00
|
|
|
|
|
|
|
/* See whether we can handle it from the cache. */
|
2004-08-26 20:35:05 +02:00
|
|
|
struct datahead *cached;
|
|
|
|
cached = (struct datahead *) cache_search (req->type, key, req->key_len,
|
|
|
|
db, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
if (cached != NULL)
|
|
|
|
{
|
|
|
|
/* Hurray it's in the cache. */
|
2005-02-22 23:58:32 +01:00
|
|
|
if (writeall (fd, cached->data, cached->recsize)
|
2004-12-22 21:10:10 +01:00
|
|
|
!= cached->recsize
|
2001-07-17 04:38:34 +02:00
|
|
|
&& __builtin_expect (debug_level, 0) > 0)
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
|
|
|
/* We have problems sending the result. */
|
|
|
|
char buf[256];
|
|
|
|
dbg_log (_("cannot write result: %s"),
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
|
|
|
}
|
|
|
|
|
|
|
|
pthread_rwlock_unlock (&db->lock);
|
|
|
|
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
pthread_rwlock_unlock (&db->lock);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
2001-07-17 04:38:34 +02:00
|
|
|
else if (__builtin_expect (debug_level, 0) > 0)
|
1999-09-27 02:22:04 +02:00
|
|
|
{
|
|
|
|
if (req->type == INVALIDATE)
|
2004-09-08 17:46:42 +02:00
|
|
|
dbg_log ("\t%s (%s)", serv2str[req->type], (char *) key);
|
2004-08-04 08:25:42 +02:00
|
|
|
else
|
2004-08-26 20:35:05 +02:00
|
|
|
dbg_log ("\t%s", serv2str[req->type]);
|
1999-09-27 02:22:04 +02:00
|
|
|
}
|
1998-10-18 17:16:22 +02:00
|
|
|
|
|
|
|
/* Handle the request. */
|
|
|
|
switch (req->type)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
1998-10-18 17:16:22 +02:00
|
|
|
case GETPWBYNAME:
|
2004-08-26 20:35:05 +02:00
|
|
|
addpwbyname (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GETPWBYUID:
|
2004-08-26 20:35:05 +02:00
|
|
|
addpwbyuid (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GETGRBYNAME:
|
2004-08-26 20:35:05 +02:00
|
|
|
addgrbyname (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GETGRBYGID:
|
2004-08-26 20:35:05 +02:00
|
|
|
addgrbygid (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GETHOSTBYNAME:
|
2004-08-26 20:35:05 +02:00
|
|
|
addhstbyname (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GETHOSTBYNAMEv6:
|
2004-08-26 20:35:05 +02:00
|
|
|
addhstbynamev6 (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GETHOSTBYADDR:
|
2004-08-26 20:35:05 +02:00
|
|
|
addhstbyaddr (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GETHOSTBYADDRv6:
|
2004-08-26 20:35:05 +02:00
|
|
|
addhstbyaddrv6 (db, fd, req, key, uid);
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
2004-09-15 10:25:49 +02:00
|
|
|
case GETAI:
|
|
|
|
addhstai (db, fd, req, key, uid);
|
|
|
|
break;
|
|
|
|
|
2004-09-30 04:24:51 +02:00
|
|
|
case INITGROUPS:
|
|
|
|
addinitgroups (db, fd, req, key, uid);
|
|
|
|
break;
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
case GETSTAT:
|
|
|
|
case SHUTDOWN:
|
1999-09-27 02:22:04 +02:00
|
|
|
case INVALIDATE:
|
2004-12-22 21:10:10 +01:00
|
|
|
if (! secure_in_use)
|
|
|
|
{
|
|
|
|
/* Get the callers credentials. */
|
2000-01-08 11:13:33 +01:00
|
|
|
#ifdef SO_PEERCRED
|
2004-12-22 21:10:10 +01:00
|
|
|
struct ucred caller;
|
|
|
|
socklen_t optlen = sizeof (caller);
|
2002-09-05 20:52:18 +02:00
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
if (getsockopt (fd, SOL_SOCKET, SO_PEERCRED, &caller, &optlen) < 0)
|
|
|
|
{
|
|
|
|
char buf[256];
|
1999-06-11 22:58:21 +02:00
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
dbg_log (_("error getting callers id: %s"),
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
|
|
|
break;
|
|
|
|
}
|
2003-05-04 09:00:44 +02:00
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
uid = caller.uid;
|
2003-05-04 09:00:44 +02:00
|
|
|
#else
|
2004-12-22 21:10:10 +01:00
|
|
|
/* Some systems have no SO_PEERCRED implementation. They don't
|
|
|
|
care about security so we don't as well. */
|
|
|
|
uid = 0;
|
2000-01-08 11:13:33 +01:00
|
|
|
#endif
|
2004-12-22 21:10:10 +01:00
|
|
|
}
|
2003-05-04 09:00:44 +02:00
|
|
|
|
|
|
|
/* Accept shutdown, getstat and invalidate only from root. For
|
|
|
|
the stat call also allow the user specified in the config file. */
|
|
|
|
if (req->type == GETSTAT)
|
|
|
|
{
|
|
|
|
if (uid == 0 || uid == stat_uid)
|
|
|
|
send_stats (fd, dbs);
|
|
|
|
}
|
|
|
|
else if (uid == 0)
|
|
|
|
{
|
|
|
|
if (req->type == INVALIDATE)
|
2004-12-22 21:10:10 +01:00
|
|
|
invalidate_cache (key);
|
2003-05-04 09:00:44 +02:00
|
|
|
else
|
|
|
|
termination_handler (0);
|
1999-06-11 22:58:21 +02:00
|
|
|
}
|
1998-10-18 17:16:22 +02:00
|
|
|
break;
|
|
|
|
|
2004-09-08 17:46:42 +02:00
|
|
|
case GETFDPW:
|
|
|
|
case GETFDGR:
|
|
|
|
case GETFDHST:
|
|
|
|
#ifdef SCM_RIGHTS
|
|
|
|
send_ro_fd (serv2db[req->type], key, fd);
|
|
|
|
#endif
|
|
|
|
break;
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
default:
|
2000-02-18 18:25:16 +01:00
|
|
|
/* Ignore the command, it's nothing we know. */
|
|
|
|
break;
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
1998-10-18 17:16:22 +02:00
|
|
|
}
|
|
|
|
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-10-03 21:33:48 +02:00
|
|
|
/* Restart the process. */
|
|
|
|
static void
|
|
|
|
restart (void)
|
|
|
|
{
|
|
|
|
/* First determine the parameters. We do not use the parameters
|
|
|
|
passed to main() since in case nscd is started by running the
|
|
|
|
dynamic linker this will not work. Yes, this is not the usual
|
|
|
|
case but nscd is part of glibc and we occasionally do this. */
|
|
|
|
size_t buflen = 1024;
|
|
|
|
char *buf = alloca (buflen);
|
|
|
|
size_t readlen = 0;
|
|
|
|
int fd = open ("/proc/self/cmdline", O_RDONLY);
|
|
|
|
if (fd == -1)
|
|
|
|
{
|
|
|
|
dbg_log (_("\
|
|
|
|
cannot open /proc/self/cmdline: %s; disabling paranoia mode"),
|
|
|
|
strerror (errno));
|
|
|
|
|
|
|
|
paranoia = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
while (1)
|
|
|
|
{
|
|
|
|
ssize_t n = TEMP_FAILURE_RETRY (read (fd, buf + readlen,
|
|
|
|
buflen - readlen));
|
|
|
|
if (n == -1)
|
|
|
|
{
|
|
|
|
dbg_log (_("\
|
|
|
|
cannot open /proc/self/cmdline: %s; disabling paranoia mode"),
|
|
|
|
strerror (errno));
|
|
|
|
|
|
|
|
close (fd);
|
|
|
|
paranoia = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
readlen += n;
|
|
|
|
|
|
|
|
if (readlen < buflen)
|
|
|
|
break;
|
|
|
|
|
|
|
|
/* We might have to extend the buffer. */
|
|
|
|
size_t old_buflen = buflen;
|
|
|
|
char *newp = extend_alloca (buf, buflen, 2 * buflen);
|
|
|
|
buf = memmove (newp, buf, old_buflen);
|
|
|
|
}
|
|
|
|
|
|
|
|
close (fd);
|
|
|
|
|
|
|
|
/* Parse the command line. Worst case scenario: every two
|
|
|
|
characters form one parameter (one character plus NUL). */
|
|
|
|
char **argv = alloca ((readlen / 2 + 1) * sizeof (argv[0]));
|
|
|
|
int argc = 0;
|
|
|
|
|
|
|
|
char *cp = buf;
|
|
|
|
while (cp < buf + readlen)
|
|
|
|
{
|
|
|
|
argv[argc++] = cp;
|
|
|
|
cp = (char *) rawmemchr (cp, '\0') + 1;
|
|
|
|
}
|
|
|
|
argv[argc] = NULL;
|
|
|
|
|
|
|
|
/* Second, change back to the old user if we changed it. */
|
|
|
|
if (server_user != NULL)
|
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
if (setuid (old_uid) != 0)
|
2004-10-03 21:33:48 +02:00
|
|
|
{
|
|
|
|
dbg_log (_("\
|
|
|
|
cannot change to old UID: %s; disabling paranoia mode"),
|
|
|
|
strerror (errno));
|
|
|
|
|
|
|
|
paranoia = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
if (setgid (old_gid) != 0)
|
2004-10-03 21:33:48 +02:00
|
|
|
{
|
|
|
|
dbg_log (_("\
|
|
|
|
cannot change to old GID: %s; disabling paranoia mode"),
|
|
|
|
strerror (errno));
|
|
|
|
|
|
|
|
setuid (server_uid);
|
|
|
|
paranoia = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Next change back to the old working directory. */
|
|
|
|
if (chdir (oldcwd) == -1)
|
|
|
|
{
|
|
|
|
dbg_log (_("\
|
|
|
|
cannot change to old working directory: %s; disabling paranoia mode"),
|
|
|
|
strerror (errno));
|
|
|
|
|
|
|
|
if (server_user != NULL)
|
|
|
|
{
|
|
|
|
setuid (server_uid);
|
|
|
|
setgid (server_gid);
|
|
|
|
}
|
|
|
|
paranoia = 0;
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Synchronize memory. */
|
|
|
|
for (int cnt = 0; cnt < lastdb; ++cnt)
|
|
|
|
{
|
|
|
|
/* Make sure nobody keeps using the database. */
|
|
|
|
dbs[cnt].head->timestamp = 0;
|
|
|
|
|
|
|
|
if (dbs[cnt].persistent)
|
|
|
|
// XXX async OK?
|
|
|
|
msync (dbs[cnt].head, dbs[cnt].memsize, MS_ASYNC);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* The preparations are done. */
|
|
|
|
execv ("/proc/self/exe", argv);
|
|
|
|
|
|
|
|
/* If we come here, we will never be able to re-exec. */
|
|
|
|
dbg_log (_("re-exec failed: %s; disabling paranoia mode"),
|
|
|
|
strerror (errno));
|
|
|
|
|
|
|
|
if (server_user != NULL)
|
|
|
|
{
|
|
|
|
setuid (server_uid);
|
|
|
|
setgid (server_gid);
|
|
|
|
}
|
2005-07-19 00:28:46 +02:00
|
|
|
if (chdir ("/") != 0)
|
|
|
|
dbg_log (_("cannot change current working directory to \"/\": %s"),
|
|
|
|
strerror (errno));
|
2004-10-03 21:33:48 +02:00
|
|
|
paranoia = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* List of file descriptors. */
|
|
|
|
struct fdlist
|
|
|
|
{
|
|
|
|
int fd;
|
|
|
|
struct fdlist *next;
|
|
|
|
};
|
|
|
|
/* Memory allocated for the list. */
|
|
|
|
static struct fdlist *fdlist;
|
|
|
|
/* List of currently ready-to-read file descriptors. */
|
|
|
|
static struct fdlist *readylist;
|
|
|
|
|
|
|
|
/* Conditional variable and mutex to signal availability of entries in
|
|
|
|
READYLIST. The condvar is initialized dynamically since we might
|
|
|
|
use a different clock depending on availability. */
|
|
|
|
static pthread_cond_t readylist_cond;
|
|
|
|
static pthread_mutex_t readylist_lock = PTHREAD_MUTEX_INITIALIZER;
|
|
|
|
|
|
|
|
/* The clock to use with the condvar. */
|
|
|
|
static clockid_t timeout_clock = CLOCK_REALTIME;
|
|
|
|
|
|
|
|
/* Number of threads ready to handle the READYLIST. */
|
|
|
|
static unsigned long int nready;
|
|
|
|
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* This is the main loop. It is replicated in different threads but the
|
|
|
|
`poll' call makes sure only one thread handles an incoming connection. */
|
|
|
|
static void *
|
|
|
|
__attribute__ ((__noreturn__))
|
|
|
|
nscd_run (void *p)
|
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
const long int my_number = (long int) p;
|
|
|
|
const int run_prune = my_number < lastdb && dbs[my_number].enabled;
|
|
|
|
struct timespec prune_ts;
|
|
|
|
int to = 0;
|
|
|
|
char buf[256];
|
1998-07-24 23:32:39 +02:00
|
|
|
|
2004-09-11 22:48:01 +02:00
|
|
|
if (run_prune)
|
2004-10-03 03:21:47 +02:00
|
|
|
{
|
|
|
|
setup_thread (&dbs[my_number]);
|
2004-09-08 19:56:46 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* We are running. */
|
|
|
|
dbs[my_number].head->timestamp = time (NULL);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
if (clock_gettime (timeout_clock, &prune_ts) == -1)
|
|
|
|
/* Should never happen. */
|
|
|
|
abort ();
|
2003-04-28 04:43:30 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* Compute timeout time. */
|
|
|
|
prune_ts.tv_sec += CACHE_PRUNE_INTERVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Initial locking. */
|
|
|
|
pthread_mutex_lock (&readylist_lock);
|
|
|
|
|
|
|
|
/* One more thread available. */
|
|
|
|
++nready;
|
2003-04-28 04:43:30 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
while (1)
|
|
|
|
{
|
|
|
|
while (readylist == NULL)
|
2004-08-25 19:24:52 +02:00
|
|
|
{
|
|
|
|
if (run_prune)
|
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
/* Wait, but not forever. */
|
|
|
|
to = pthread_cond_timedwait (&readylist_cond, &readylist_lock,
|
|
|
|
&prune_ts);
|
|
|
|
|
|
|
|
/* If we were woken and there is no work to be done,
|
|
|
|
just start pruning. */
|
|
|
|
if (readylist == NULL && to == ETIMEDOUT)
|
|
|
|
{
|
2004-10-03 21:33:48 +02:00
|
|
|
--nready;
|
2004-10-03 03:21:47 +02:00
|
|
|
pthread_mutex_unlock (&readylist_lock);
|
|
|
|
goto only_prune;
|
|
|
|
}
|
2004-08-25 19:24:52 +02:00
|
|
|
}
|
2004-10-03 03:21:47 +02:00
|
|
|
else
|
|
|
|
/* No need to timeout. */
|
|
|
|
pthread_cond_wait (&readylist_cond, &readylist_lock);
|
|
|
|
}
|
2003-04-28 04:43:30 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
struct fdlist *it = readylist->next;
|
|
|
|
if (readylist->next == readylist)
|
|
|
|
/* Just one entry on the list. */
|
|
|
|
readylist = NULL;
|
|
|
|
else
|
|
|
|
readylist->next = it->next;
|
2003-04-28 04:43:30 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* Extract the information and mark the record ready to be used
|
|
|
|
again. */
|
|
|
|
int fd = it->fd;
|
|
|
|
it->next = NULL;
|
2003-04-28 04:43:30 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* One more thread available. */
|
|
|
|
--nready;
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* We are done with the list. */
|
|
|
|
pthread_mutex_unlock (&readylist_lock);
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* We do not want to block on a short read or so. */
|
|
|
|
int fl = fcntl (fd, F_GETFL);
|
|
|
|
if (fl == -1 || fcntl (fd, F_SETFL, fl | O_NONBLOCK) == -1)
|
|
|
|
goto close_and_out;
|
2003-04-28 04:43:30 +02:00
|
|
|
|
|
|
|
/* Now read the request. */
|
2004-10-03 03:21:47 +02:00
|
|
|
request_header req;
|
2003-04-28 04:43:30 +02:00
|
|
|
if (__builtin_expect (TEMP_FAILURE_RETRY (read (fd, &req, sizeof (req)))
|
|
|
|
!= sizeof (req), 0))
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
/* We failed to read data. Note that this also might mean we
|
|
|
|
failed because we would have blocked. */
|
2003-04-28 04:43:30 +02:00
|
|
|
if (debug_level > 0)
|
|
|
|
dbg_log (_("short read while reading request: %s"),
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
2004-10-03 03:21:47 +02:00
|
|
|
goto close_and_out;
|
2003-04-28 04:43:30 +02:00
|
|
|
}
|
|
|
|
|
2004-09-03 05:39:45 +02:00
|
|
|
/* Check whether this is a valid request type. */
|
|
|
|
if (req.type < GETPWBYNAME || req.type >= LASTREQ)
|
|
|
|
goto close_and_out;
|
|
|
|
|
2003-04-28 04:43:30 +02:00
|
|
|
/* Some systems have no SO_PEERCRED implementation. They don't
|
|
|
|
care about security so we don't as well. */
|
2004-10-03 03:21:47 +02:00
|
|
|
uid_t uid = -1;
|
2003-04-26 06:15:50 +02:00
|
|
|
#ifdef SO_PEERCRED
|
2004-10-03 03:21:47 +02:00
|
|
|
pid_t pid = 0;
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
if (secure_in_use)
|
|
|
|
{
|
|
|
|
struct ucred caller;
|
|
|
|
socklen_t optlen = sizeof (caller);
|
|
|
|
|
|
|
|
if (getsockopt (fd, SOL_SOCKET, SO_PEERCRED, &caller, &optlen) < 0)
|
|
|
|
{
|
|
|
|
dbg_log (_("error getting callers id: %s"),
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
|
|
|
goto close_and_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (req.type < GETPWBYNAME || req.type > LASTDBREQ
|
|
|
|
|| serv2db[req.type]->secure)
|
|
|
|
uid = caller.uid;
|
|
|
|
|
|
|
|
pid = caller.pid;
|
|
|
|
}
|
|
|
|
else if (__builtin_expect (debug_level > 0, 0))
|
2003-04-28 04:43:30 +02:00
|
|
|
{
|
|
|
|
struct ucred caller;
|
|
|
|
socklen_t optlen = sizeof (caller);
|
2003-04-26 06:15:50 +02:00
|
|
|
|
2003-04-28 04:43:30 +02:00
|
|
|
if (getsockopt (fd, SOL_SOCKET, SO_PEERCRED, &caller, &optlen) == 0)
|
|
|
|
pid = caller.pid;
|
|
|
|
}
|
2000-01-08 11:13:33 +01:00
|
|
|
#endif
|
1999-06-11 22:58:21 +02:00
|
|
|
|
2003-04-28 04:43:30 +02:00
|
|
|
/* It should not be possible to crash the nscd with a silly
|
|
|
|
request (i.e., a terribly large key). We limit the size to 1kb. */
|
2004-10-03 03:21:47 +02:00
|
|
|
#define MAXKEYLEN 1024
|
2003-04-28 04:43:30 +02:00
|
|
|
if (__builtin_expect (req.key_len, 1) < 0
|
2004-10-03 03:21:47 +02:00
|
|
|
|| __builtin_expect (req.key_len, 1) > MAXKEYLEN)
|
2003-04-28 04:43:30 +02:00
|
|
|
{
|
|
|
|
if (debug_level > 0)
|
|
|
|
dbg_log (_("key length in request too long: %d"), req.key_len);
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Get the key. */
|
2004-10-03 03:21:47 +02:00
|
|
|
char keybuf[MAXKEYLEN];
|
2003-04-28 04:43:30 +02:00
|
|
|
|
|
|
|
if (__builtin_expect (TEMP_FAILURE_RETRY (read (fd, keybuf,
|
|
|
|
req.key_len))
|
|
|
|
!= req.key_len, 0))
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
/* Again, this can also mean we would have blocked. */
|
2001-07-17 03:37:42 +02:00
|
|
|
if (debug_level > 0)
|
2003-04-28 04:43:30 +02:00
|
|
|
dbg_log (_("short read while reading request key: %s"),
|
|
|
|
strerror_r (errno, buf, sizeof (buf)));
|
2004-10-03 03:21:47 +02:00
|
|
|
goto close_and_out;
|
1998-10-18 17:16:22 +02:00
|
|
|
}
|
2003-04-28 04:43:30 +02:00
|
|
|
|
|
|
|
if (__builtin_expect (debug_level, 0) > 0)
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
2003-04-26 06:15:50 +02:00
|
|
|
#ifdef SO_PEERCRED
|
2003-04-28 04:43:30 +02:00
|
|
|
if (pid != 0)
|
|
|
|
dbg_log (_("\
|
2003-04-26 06:15:50 +02:00
|
|
|
handle_request: request received (Version = %d) from PID %ld"),
|
2003-04-28 04:43:30 +02:00
|
|
|
req.version, (long int) pid);
|
|
|
|
else
|
2003-04-26 06:15:50 +02:00
|
|
|
#endif
|
2003-04-28 04:43:30 +02:00
|
|
|
dbg_log (_("\
|
2003-04-26 06:15:50 +02:00
|
|
|
handle_request: request received (Version = %d)"), req.version);
|
2003-04-28 04:43:30 +02:00
|
|
|
}
|
2003-04-26 06:15:50 +02:00
|
|
|
|
2003-04-28 04:43:30 +02:00
|
|
|
/* Phew, we got all the data, now process it. */
|
|
|
|
handle_request (fd, &req, keybuf, uid);
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
1998-07-24 23:32:39 +02:00
|
|
|
|
2004-09-03 05:39:45 +02:00
|
|
|
close_and_out:
|
|
|
|
/* We are done. */
|
|
|
|
close (fd);
|
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* Check whether we should be pruning the cache. */
|
|
|
|
assert (run_prune || to == 0);
|
|
|
|
if (to == ETIMEDOUT)
|
|
|
|
{
|
|
|
|
only_prune:
|
|
|
|
/* The pthread_cond_timedwait() call timed out. It is time
|
|
|
|
to clean up the cache. */
|
|
|
|
assert (my_number < lastdb);
|
2005-04-28 08:27:13 +02:00
|
|
|
prune_cache (&dbs[my_number], time (NULL));
|
2004-10-03 03:21:47 +02:00
|
|
|
|
|
|
|
if (clock_gettime (timeout_clock, &prune_ts) == -1)
|
|
|
|
/* Should never happen. */
|
|
|
|
abort ();
|
|
|
|
|
|
|
|
/* Compute next timeout time. */
|
|
|
|
prune_ts.tv_sec += CACHE_PRUNE_INTERVAL;
|
|
|
|
|
|
|
|
/* In case the list is emtpy we do not want to run the prune
|
|
|
|
code right away again. */
|
|
|
|
to = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Re-locking. */
|
|
|
|
pthread_mutex_lock (&readylist_lock);
|
|
|
|
|
|
|
|
/* One more thread available. */
|
|
|
|
++nready;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
2004-10-03 09:33:54 +02:00
|
|
|
static unsigned int nconns;
|
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
static void
|
2004-10-03 09:33:54 +02:00
|
|
|
fd_ready (int fd)
|
2004-10-03 03:21:47 +02:00
|
|
|
{
|
2004-10-03 09:33:54 +02:00
|
|
|
pthread_mutex_lock (&readylist_lock);
|
|
|
|
|
|
|
|
/* Find an empty entry in FDLIST. */
|
|
|
|
size_t inner;
|
|
|
|
for (inner = 0; inner < nconns; ++inner)
|
|
|
|
if (fdlist[inner].next == NULL)
|
|
|
|
break;
|
|
|
|
assert (inner < nconns);
|
|
|
|
|
|
|
|
fdlist[inner].fd = fd;
|
|
|
|
|
|
|
|
if (readylist == NULL)
|
|
|
|
readylist = fdlist[inner].next = &fdlist[inner];
|
2004-10-03 03:21:47 +02:00
|
|
|
else
|
2004-10-03 09:33:54 +02:00
|
|
|
{
|
|
|
|
fdlist[inner].next = readylist->next;
|
|
|
|
readylist = readylist->next = &fdlist[inner];
|
|
|
|
}
|
|
|
|
|
|
|
|
bool do_signal = true;
|
|
|
|
if (__builtin_expect (nready == 0, 0))
|
|
|
|
{
|
|
|
|
++client_queued;
|
|
|
|
do_signal = false;
|
2004-10-03 23:11:37 +02:00
|
|
|
|
|
|
|
/* Try to start another thread to help out. */
|
|
|
|
pthread_t th;
|
|
|
|
if (nthreads < max_nthreads
|
|
|
|
&& pthread_create (&th, &attr, nscd_run,
|
|
|
|
(void *) (long int) nthreads) == 0)
|
|
|
|
{
|
|
|
|
/* We got another thread. */
|
|
|
|
++nthreads;
|
2005-08-09 08:16:47 +02:00
|
|
|
/* The new thread might need a kick. */
|
2004-10-03 23:11:37 +02:00
|
|
|
do_signal = true;
|
|
|
|
}
|
|
|
|
|
2004-10-03 09:33:54 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
pthread_mutex_unlock (&readylist_lock);
|
|
|
|
|
|
|
|
/* Tell one of the worker threads there is work to do. */
|
|
|
|
if (do_signal)
|
|
|
|
pthread_cond_signal (&readylist_cond);
|
|
|
|
}
|
2004-10-03 03:21:47 +02:00
|
|
|
|
2004-10-03 09:33:54 +02:00
|
|
|
|
2004-10-03 21:33:48 +02:00
|
|
|
/* Check whether restarting should happen. */
|
|
|
|
static inline int
|
|
|
|
restart_p (time_t now)
|
|
|
|
{
|
|
|
|
return (paranoia && readylist == NULL && nready == nthreads
|
|
|
|
&& now >= restart_time);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Array for times a connection was accepted. */
|
2004-10-03 09:33:54 +02:00
|
|
|
static time_t *starttime;
|
|
|
|
|
|
|
|
|
|
|
|
static void
|
|
|
|
__attribute__ ((__noreturn__))
|
|
|
|
main_loop_poll (void)
|
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
struct pollfd *conns = (struct pollfd *) xmalloc (nconns
|
|
|
|
* sizeof (conns[0]));
|
|
|
|
|
|
|
|
conns[0].fd = sock;
|
|
|
|
conns[0].events = POLLRDNORM;
|
|
|
|
size_t nused = 1;
|
|
|
|
size_t firstfree = 1;
|
|
|
|
|
|
|
|
while (1)
|
|
|
|
{
|
|
|
|
/* Wait for any event. We wait at most a couple of seconds so
|
|
|
|
that we can check whether we should close any of the accepted
|
|
|
|
connections since we have not received a request. */
|
|
|
|
#define MAX_ACCEPT_TIMEOUT 30
|
|
|
|
#define MIN_ACCEPT_TIMEOUT 5
|
|
|
|
#define MAIN_THREAD_TIMEOUT \
|
|
|
|
(MAX_ACCEPT_TIMEOUT * 1000 \
|
|
|
|
- ((MAX_ACCEPT_TIMEOUT - MIN_ACCEPT_TIMEOUT) * 1000 * nused) / (2 * nconns))
|
|
|
|
|
|
|
|
int n = poll (conns, nused, MAIN_THREAD_TIMEOUT);
|
|
|
|
|
|
|
|
time_t now = time (NULL);
|
|
|
|
|
|
|
|
/* If there is a descriptor ready for reading or there is a new
|
|
|
|
connection, process this now. */
|
|
|
|
if (n > 0)
|
1998-10-18 17:16:22 +02:00
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
if (conns[0].revents != 0)
|
|
|
|
{
|
|
|
|
/* We have a new incoming connection. Accept the connection. */
|
|
|
|
int fd = TEMP_FAILURE_RETRY (accept (sock, NULL, NULL));
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
/* use the descriptor if we have not reached the limit. */
|
|
|
|
if (fd >= 0 && firstfree < nconns)
|
2004-10-03 03:21:47 +02:00
|
|
|
{
|
2004-12-22 21:10:10 +01:00
|
|
|
conns[firstfree].fd = fd;
|
|
|
|
conns[firstfree].events = POLLRDNORM;
|
|
|
|
starttime[firstfree] = now;
|
|
|
|
if (firstfree >= nused)
|
|
|
|
nused = firstfree + 1;
|
|
|
|
|
|
|
|
do
|
|
|
|
++firstfree;
|
|
|
|
while (firstfree < nused && conns[firstfree].fd != -1);
|
2004-10-03 03:21:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
--n;
|
|
|
|
}
|
|
|
|
|
|
|
|
for (size_t cnt = 1; cnt < nused && n > 0; ++cnt)
|
|
|
|
if (conns[cnt].revents != 0)
|
|
|
|
{
|
2004-10-03 09:33:54 +02:00
|
|
|
fd_ready (conns[cnt].fd);
|
2004-10-03 03:21:47 +02:00
|
|
|
|
|
|
|
/* Clean up the CONNS array. */
|
|
|
|
conns[cnt].fd = -1;
|
|
|
|
if (cnt < firstfree)
|
|
|
|
firstfree = cnt;
|
|
|
|
if (cnt == nused - 1)
|
|
|
|
do
|
|
|
|
--nused;
|
|
|
|
while (conns[nused - 1].fd == -1);
|
|
|
|
|
|
|
|
--n;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now find entries which have timed out. */
|
|
|
|
assert (nused > 0);
|
2004-10-03 09:33:54 +02:00
|
|
|
|
|
|
|
/* We make the timeout length depend on the number of file
|
|
|
|
descriptors currently used. */
|
2004-10-03 03:21:47 +02:00
|
|
|
#define ACCEPT_TIMEOUT \
|
|
|
|
(MAX_ACCEPT_TIMEOUT \
|
|
|
|
- ((MAX_ACCEPT_TIMEOUT - MIN_ACCEPT_TIMEOUT) * nused) / nconns)
|
2004-10-03 09:33:54 +02:00
|
|
|
time_t laststart = now - ACCEPT_TIMEOUT;
|
2004-10-03 03:21:47 +02:00
|
|
|
|
2004-10-03 09:33:54 +02:00
|
|
|
for (size_t cnt = nused - 1; cnt > 0; --cnt)
|
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
if (conns[cnt].fd != -1 && starttime[cnt] < laststart)
|
|
|
|
{
|
|
|
|
/* Remove the entry, it timed out. */
|
|
|
|
(void) close (conns[cnt].fd);
|
|
|
|
conns[cnt].fd = -1;
|
|
|
|
|
|
|
|
if (cnt < firstfree)
|
|
|
|
firstfree = cnt;
|
|
|
|
if (cnt == nused - 1)
|
|
|
|
do
|
|
|
|
--nused;
|
|
|
|
while (conns[nused - 1].fd == -1);
|
|
|
|
}
|
1998-10-18 17:16:22 +02:00
|
|
|
}
|
2004-10-03 21:33:48 +02:00
|
|
|
|
|
|
|
if (restart_p (now))
|
|
|
|
restart ();
|
1998-07-25 20:02:26 +02:00
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
|
2004-10-03 09:33:54 +02:00
|
|
|
#ifdef HAVE_EPOLL
|
|
|
|
static void
|
|
|
|
main_loop_epoll (int efd)
|
|
|
|
{
|
|
|
|
struct epoll_event ev = { 0, };
|
|
|
|
int nused = 1;
|
|
|
|
size_t highest = 0;
|
|
|
|
|
|
|
|
/* Add the socket. */
|
|
|
|
ev.events = EPOLLRDNORM;
|
|
|
|
ev.data.fd = sock;
|
|
|
|
if (epoll_ctl (efd, EPOLL_CTL_ADD, sock, &ev) == -1)
|
|
|
|
/* We cannot use epoll. */
|
|
|
|
return;
|
|
|
|
|
|
|
|
while (1)
|
|
|
|
{
|
|
|
|
struct epoll_event revs[100];
|
|
|
|
# define nrevs (sizeof (revs) / sizeof (revs[0]))
|
|
|
|
|
|
|
|
int n = epoll_wait (efd, revs, nrevs, MAIN_THREAD_TIMEOUT);
|
|
|
|
|
|
|
|
time_t now = time (NULL);
|
|
|
|
|
|
|
|
for (int cnt = 0; cnt < n; ++cnt)
|
|
|
|
if (revs[cnt].data.fd == sock)
|
|
|
|
{
|
|
|
|
/* A new connection. */
|
|
|
|
int fd = TEMP_FAILURE_RETRY (accept (sock, NULL, NULL));
|
|
|
|
|
|
|
|
if (fd >= 0)
|
|
|
|
{
|
|
|
|
/* Try to add the new descriptor. */
|
|
|
|
ev.data.fd = fd;
|
|
|
|
if (fd >= nconns
|
|
|
|
|| epoll_ctl (efd, EPOLL_CTL_ADD, fd, &ev) == -1)
|
|
|
|
/* The descriptor is too large or something went
|
|
|
|
wrong. Close the descriptor. */
|
|
|
|
close (fd);
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Remember when we accepted the connection. */
|
|
|
|
starttime[fd] = now;
|
|
|
|
|
|
|
|
if (fd > highest)
|
|
|
|
highest = fd;
|
|
|
|
|
|
|
|
++nused;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* Remove the descriptor from the epoll descriptor. */
|
2005-08-09 08:16:47 +02:00
|
|
|
(void) epoll_ctl (efd, EPOLL_CTL_DEL, revs[cnt].data.fd, NULL);
|
2004-10-03 09:33:54 +02:00
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
/* Get a worked to handle the request. */
|
2004-10-03 09:33:54 +02:00
|
|
|
fd_ready (revs[cnt].data.fd);
|
|
|
|
|
|
|
|
/* Reset the time. */
|
|
|
|
starttime[revs[cnt].data.fd] = 0;
|
|
|
|
if (revs[cnt].data.fd == highest)
|
|
|
|
do
|
|
|
|
--highest;
|
|
|
|
while (highest > 0 && starttime[highest] == 0);
|
|
|
|
|
|
|
|
--nused;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now look for descriptors for accepted connections which have
|
|
|
|
no reply in too long of a time. */
|
|
|
|
time_t laststart = now - ACCEPT_TIMEOUT;
|
|
|
|
for (int cnt = highest; cnt > STDERR_FILENO; --cnt)
|
|
|
|
if (cnt != sock && starttime[cnt] != 0 && starttime[cnt] < laststart)
|
|
|
|
{
|
|
|
|
/* We are waiting for this one for too long. Close it. */
|
2005-08-09 08:16:47 +02:00
|
|
|
(void) epoll_ctl (efd, EPOLL_CTL_DEL, cnt, NULL);
|
2004-10-03 09:33:54 +02:00
|
|
|
|
|
|
|
(void) close (cnt);
|
|
|
|
|
|
|
|
starttime[cnt] = 0;
|
|
|
|
if (cnt == highest)
|
|
|
|
--highest;
|
|
|
|
}
|
|
|
|
else if (cnt != sock && starttime[cnt] == 0 && cnt == highest)
|
|
|
|
--highest;
|
2004-10-03 21:33:48 +02:00
|
|
|
|
|
|
|
if (restart_p (now))
|
|
|
|
restart ();
|
2004-10-03 09:33:54 +02:00
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* Start all the threads we want. The initial process is thread no. 1. */
|
1998-01-31 09:39:55 +01:00
|
|
|
void
|
1998-10-18 17:16:22 +02:00
|
|
|
start_threads (void)
|
1998-01-31 09:39:55 +01:00
|
|
|
{
|
2004-10-03 03:21:47 +02:00
|
|
|
/* Initialize the conditional variable we will use. The only
|
|
|
|
non-standard attribute we might use is the clock selection. */
|
|
|
|
pthread_condattr_t condattr;
|
|
|
|
pthread_condattr_init (&condattr);
|
|
|
|
|
2004-10-04 18:35:54 +02:00
|
|
|
#if defined _POSIX_CLOCK_SELECTION && _POSIX_CLOCK_SELECTION >= 0 \
|
|
|
|
&& defined _POSIX_MONOTONIC_CLOCK && _POSIX_MONOTONIC_CLOCK >= 0
|
2004-10-03 03:21:47 +02:00
|
|
|
/* Determine whether the monotonous clock is available. */
|
|
|
|
struct timespec dummy;
|
2004-10-04 18:35:54 +02:00
|
|
|
# if _POSIX_MONOTONIC_CLOCK == 0
|
2004-10-04 21:28:07 +02:00
|
|
|
if (sysconf (_SC_MONOTONIC_CLOCK) > 0)
|
2004-10-04 18:35:54 +02:00
|
|
|
# endif
|
|
|
|
# if _POSIX_CLOCK_SELECTION == 0
|
2004-10-04 21:28:07 +02:00
|
|
|
if (sysconf (_SC_CLOCK_SELECTION) > 0)
|
2004-10-04 18:35:54 +02:00
|
|
|
# endif
|
2004-10-04 21:28:07 +02:00
|
|
|
if (clock_getres (CLOCK_MONOTONIC, &dummy) == 0
|
|
|
|
&& pthread_condattr_setclock (&condattr, CLOCK_MONOTONIC) == 0)
|
|
|
|
timeout_clock = CLOCK_MONOTONIC;
|
2004-10-03 03:21:47 +02:00
|
|
|
#endif
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
pthread_cond_init (&readylist_cond, &condattr);
|
|
|
|
pthread_condattr_destroy (&condattr);
|
|
|
|
|
|
|
|
|
|
|
|
/* Create the attribute for the threads. They are all created
|
|
|
|
detached. */
|
1998-10-18 17:16:22 +02:00
|
|
|
pthread_attr_init (&attr);
|
|
|
|
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
|
2004-10-03 23:11:37 +02:00
|
|
|
/* Use 1MB stacks, twice as much for 64-bit architectures. */
|
|
|
|
pthread_attr_setstacksize (&attr, 1024 * 1024 * (sizeof (void *) / 4));
|
1998-01-31 09:39:55 +01:00
|
|
|
|
1998-10-18 17:16:22 +02:00
|
|
|
/* We allow less than LASTDB threads only for debugging. */
|
|
|
|
if (debug_level == 0)
|
|
|
|
nthreads = MAX (nthreads, lastdb);
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-10-03 23:11:37 +02:00
|
|
|
int nfailed = 0;
|
2004-10-03 03:21:47 +02:00
|
|
|
for (long int i = 0; i < nthreads; ++i)
|
|
|
|
{
|
|
|
|
pthread_t th;
|
2004-10-03 23:11:37 +02:00
|
|
|
if (pthread_create (&th, &attr, nscd_run, (void *) (i - nfailed)) != 0)
|
|
|
|
++nfailed;
|
|
|
|
}
|
|
|
|
if (nthreads - nfailed < lastdb)
|
|
|
|
{
|
|
|
|
/* We could not start enough threads. */
|
|
|
|
dbg_log (_("could only start %d threads; terminating"),
|
|
|
|
nthreads - nfailed);
|
|
|
|
exit (1);
|
2004-10-03 03:21:47 +02:00
|
|
|
}
|
1998-01-31 09:39:55 +01:00
|
|
|
|
2004-10-03 09:33:54 +02:00
|
|
|
/* Determine how much room for descriptors we should initially
|
|
|
|
allocate. This might need to change later if we cap the number
|
|
|
|
with MAXCONN. */
|
|
|
|
const long int nfds = sysconf (_SC_OPEN_MAX);
|
|
|
|
#define MINCONN 32
|
|
|
|
#define MAXCONN 16384
|
|
|
|
if (nfds == -1 || nfds > MAXCONN)
|
|
|
|
nconns = MAXCONN;
|
|
|
|
else if (nfds < MINCONN)
|
|
|
|
nconns = MINCONN;
|
|
|
|
else
|
|
|
|
nconns = nfds;
|
|
|
|
|
|
|
|
/* We need memory to pass descriptors on to the worker threads. */
|
|
|
|
fdlist = (struct fdlist *) xcalloc (nconns, sizeof (fdlist[0]));
|
|
|
|
/* Array to keep track when connection was accepted. */
|
|
|
|
starttime = (time_t *) xcalloc (nconns, sizeof (starttime[0]));
|
|
|
|
|
2004-10-03 03:21:47 +02:00
|
|
|
/* In the main thread we execute the loop which handles incoming
|
|
|
|
connections. */
|
2004-10-03 09:33:54 +02:00
|
|
|
#ifdef HAVE_EPOLL
|
|
|
|
int efd = epoll_create (100);
|
|
|
|
if (efd != -1)
|
|
|
|
{
|
|
|
|
main_loop_epoll (efd);
|
|
|
|
close (efd);
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
main_loop_poll ();
|
1998-01-31 09:39:55 +01:00
|
|
|
}
|
2002-01-18 03:10:41 +01:00
|
|
|
|
|
|
|
|
|
|
|
/* Look up the uid, gid, and supplementary groups to run nscd as. When
|
|
|
|
this function is called, we are not listening on the nscd socket yet so
|
|
|
|
we can just use the ordinary lookup functions without causing a lockup */
|
|
|
|
static void
|
|
|
|
begin_drop_privileges (void)
|
|
|
|
{
|
2004-08-26 20:35:05 +02:00
|
|
|
struct passwd *pwd = getpwnam (server_user);
|
2002-01-18 03:10:41 +01:00
|
|
|
|
|
|
|
if (pwd == NULL)
|
|
|
|
{
|
|
|
|
dbg_log (_("Failed to run nscd as user '%s'"), server_user);
|
|
|
|
error (EXIT_FAILURE, 0, _("Failed to run nscd as user '%s'"),
|
|
|
|
server_user);
|
|
|
|
}
|
|
|
|
|
|
|
|
server_uid = pwd->pw_uid;
|
|
|
|
server_gid = pwd->pw_gid;
|
|
|
|
|
2004-10-03 21:33:48 +02:00
|
|
|
/* Save the old UID/GID if we have to change back. */
|
|
|
|
if (paranoia)
|
|
|
|
{
|
|
|
|
old_uid = getuid ();
|
|
|
|
old_gid = getgid ();
|
|
|
|
}
|
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
if (getgrouplist (server_user, server_gid, NULL, &server_ngroups) == 0)
|
|
|
|
{
|
|
|
|
/* This really must never happen. */
|
|
|
|
dbg_log (_("Failed to run nscd as user '%s'"), server_user);
|
|
|
|
error (EXIT_FAILURE, errno, _("initial getgrouplist failed"));
|
|
|
|
}
|
2002-01-18 03:10:41 +01:00
|
|
|
|
2004-08-26 20:35:05 +02:00
|
|
|
server_groups = (gid_t *) xmalloc (server_ngroups * sizeof (gid_t));
|
2002-01-18 03:10:41 +01:00
|
|
|
|
|
|
|
if (getgrouplist (server_user, server_gid, server_groups, &server_ngroups)
|
|
|
|
== -1)
|
|
|
|
{
|
|
|
|
dbg_log (_("Failed to run nscd as user '%s'"), server_user);
|
|
|
|
error (EXIT_FAILURE, errno, _("getgrouplist failed"));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Call setgroups(), setgid(), and setuid() to drop root privileges and
|
|
|
|
run nscd as the user specified in the configuration file. */
|
|
|
|
static void
|
|
|
|
finish_drop_privileges (void)
|
|
|
|
{
|
|
|
|
if (setgroups (server_ngroups, server_groups) == -1)
|
|
|
|
{
|
|
|
|
dbg_log (_("Failed to run nscd as user '%s'"), server_user);
|
|
|
|
error (EXIT_FAILURE, errno, _("setgroups failed"));
|
|
|
|
}
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
if (setgid (server_gid) == -1)
|
2002-01-18 03:10:41 +01:00
|
|
|
{
|
|
|
|
dbg_log (_("Failed to run nscd as user '%s'"), server_user);
|
|
|
|
perror ("setgid");
|
2005-06-20 17:49:08 +02:00
|
|
|
exit (4);
|
2002-01-18 03:10:41 +01:00
|
|
|
}
|
|
|
|
|
2004-12-22 21:10:10 +01:00
|
|
|
if (setuid (server_uid) == -1)
|
2002-01-18 03:10:41 +01:00
|
|
|
{
|
|
|
|
dbg_log (_("Failed to run nscd as user '%s'"), server_user);
|
|
|
|
perror ("setuid");
|
2005-06-20 17:49:08 +02:00
|
|
|
exit (4);
|
2002-01-18 03:10:41 +01:00
|
|
|
}
|
|
|
|
}
|