171 lines
5.1 KiB
C
171 lines
5.1 KiB
C
/* Copyright (c) 1998, 1999, 2000, 2001, 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Thorsten Kukuk <kukuk@suse.de>, 1998.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _NSCD_H
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#define _NSCD_H 1
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#include <pthread.h>
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#include <time.h>
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#include <sys/uio.h>
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/* The declarations for the request and response types are in the file
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"nscd-client.h", which should contain everything needed by client
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functions. */
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#include "nscd-client.h"
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/* Handle databases. */
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typedef enum
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{
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pwddb,
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grpdb,
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hstdb,
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lastdb
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} dbtype;
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/* Structure for one hash table entry. */
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struct hashentry
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{
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request_type type; /* Which type of dataset. */
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size_t len; /* Length of key. */
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void *key; /* Pointer to key. */
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uid_t owner; /* If secure table, this is the owner. */
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struct hashentry *next; /* Next entry in this hash bucket list. */
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time_t timeout; /* Time when this entry becomes invalid. */
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ssize_t total; /* Number of bytes in PACKET. */
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const void *packet; /* Records for the result. */
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void *data; /* The malloc()ed respond record. */
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int last; /* Nonzero if DATA should be free()d. */
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struct hashentry *dellist; /* Next record to be deleted. */
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};
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/* Structure describing one database. */
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struct database
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{
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pthread_rwlock_t lock;
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int enabled;
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int check_file;
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const char *filename;
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time_t file_mtime;
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size_t module;
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const struct iovec *disabled_iov;
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unsigned long int postimeout;
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unsigned long int negtimeout;
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unsigned long int poshit;
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unsigned long int neghit;
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unsigned long int posmiss;
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unsigned long int negmiss;
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unsigned long int nentries;
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unsigned long int maxnentries;
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unsigned long int maxnsearched;
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unsigned long int rdlockdelayed;
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unsigned long int wrlockdelayed;
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struct hashentry **array;
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};
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/* Global variables. */
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extern struct database dbs[lastdb];
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extern const char *dbnames[lastdb];
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extern const char *serv2str[LASTREQ];
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extern const struct iovec pwd_iov_disabled;
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extern const struct iovec grp_iov_disabled;
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extern const struct iovec hst_iov_disabled;
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/* Number of threads to run. */
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extern int nthreads;
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/* Tables for which we cache data with uid. */
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extern int secure[lastdb];
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extern int secure_in_use; /* Is one of the above 1? */
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/* User name to run server processes as. */
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extern const char *server_user;
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/* Name and UID of user who is allowed to request statistics. */
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extern const char *stat_user;
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extern uid_t stat_uid;
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/* Time the server was started. */
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extern time_t start_time;
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/* Number of times clients had to wait. */
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extern unsigned long int client_queued;
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/* Prototypes for global functions. */
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/* nscd.c */
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extern void termination_handler (int signum) __attribute__ ((__noreturn__));
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extern int nscd_open_socket (void);
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/* connections.c */
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extern void nscd_init (void);
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extern void close_sockets (void);
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extern void start_threads (void) __attribute__ ((__noreturn__));
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/* nscd_conf.c */
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extern int nscd_parse_file (const char *fname, struct database dbs[lastdb]);
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/* nscd_stat.c */
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extern void send_stats (int fd, struct database dbs[lastdb]);
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extern int receive_print_stats (void) __attribute__ ((__noreturn__));
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/* cache.c */
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extern struct hashentry *cache_search (request_type, void *key, size_t len,
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struct database *table, uid_t owner);
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extern void cache_add (int type, void *key, size_t len,
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const void *packet, size_t iovtotal, void *data,
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int last, time_t t, struct database *table,
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uid_t owner);
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extern void prune_cache (struct database *table, time_t now);
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/* pwdcache.c */
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extern void addpwbyname (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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extern void addpwbyuid (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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/* grpcache.c */
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extern void addgrbyname (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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extern void addgrbygid (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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/* hstcache.c */
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extern void addhstbyname (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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extern void addhstbyaddr (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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extern void addhstbynamev6 (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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extern void addhstbyaddrv6 (struct database *db, int fd, request_header *req,
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void *key, uid_t uid);
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#endif /* nscd.h */
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